Hello,
kernel test robot noticed a 94.7% improvement of will-it-scale.per_process_ops on:
commit: 6e553c6bcb7746abad29ce63e0cb7a18348e88fb ("fork: use __mt_dup() to duplicate maple tree in dup_mmap()")
https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master
testcase: will-it-scale
test machine: 104 threads 2 sockets (Skylake) with 192G memory
parameters:
nr_task: 100%
mode: process
test: brk2
cpufreq_governor: performance
Details are as below:
-------------------------------------------------------------------------------------------------->
The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20231128/[email protected]
=========================================================================================
compiler/cpufreq_governor/kconfig/mode/nr_task/rootfs/tbox_group/test/testcase:
gcc-12/performance/x86_64-rhel-8.3/process/100%/debian-11.1-x86_64-20220510.cgz/lkp-skl-fpga01/brk2/will-it-scale
commit:
ec81deb6b7 ("maple_tree: preserve the tree attributes when destroying maple tree")
6e553c6bcb ("fork: use __mt_dup() to duplicate maple tree in dup_mmap()")
ec81deb6b769dc1b 6e553c6bcb7746abad29ce63e0c
---------------- ---------------------------
%stddev %change %stddev
\ | \
24.47 -7.2 17.29 mpstat.cpu.all.soft%
8.76 +7.6 16.36 mpstat.cpu.all.usr%
8.80 +85.5% 16.33 vmstat.cpu.us
7732 -18.3% 6318 vmstat.system.cs
13467005 +94.7% 26223847 will-it-scale.104.processes
129489 +94.7% 252151 will-it-scale.per_process_ops
13467005 +94.7% 26223847 will-it-scale.workload
1.792e+08 -13.6% 1.549e+08 numa-numastat.node0.local_node
1.793e+08 -13.6% 1.549e+08 numa-numastat.node0.numa_hit
1.867e+08 -12.6% 1.631e+08 numa-numastat.node1.local_node
1.867e+08 -12.6% 1.632e+08 numa-numastat.node1.numa_hit
1.793e+08 -13.6% 1.549e+08 numa-vmstat.node0.numa_hit
1.792e+08 -13.6% 1.549e+08 numa-vmstat.node0.numa_local
1.867e+08 -12.6% 1.631e+08 numa-vmstat.node1.numa_hit
1.867e+08 -12.6% 1.631e+08 numa-vmstat.node1.numa_local
122.70 +43.4 166.10 turbostat.PKG_%
56.67 ? 2% -6.8% 52.83 ? 3% turbostat.PkgTmp
376.36 +1.3% 381.14 turbostat.PkgWatt
45.03 -5.8% 42.40 turbostat.RAMWatt
121103 -2.7% 117803 proc-vmstat.nr_slab_unreclaimable
68338 ? 7% +24.8% 85281 ? 6% proc-vmstat.numa_hint_faults
3.66e+08 -13.1% 3.181e+08 proc-vmstat.numa_hit
3.659e+08 -13.1% 3.18e+08 proc-vmstat.numa_local
7.155e+08 -15.6% 6.038e+08 proc-vmstat.pgalloc_normal
1025781 +2.6% 1052377 proc-vmstat.pgfault
7.131e+08 -15.5% 6.028e+08 proc-vmstat.pgfree
12305161 +10.3% 13578139 sched_debug.cfs_rq:/.avg_vruntime.avg
12419603 +10.6% 13739004 sched_debug.cfs_rq:/.avg_vruntime.max
122981 ? 5% +41.3% 173809 ? 12% sched_debug.cfs_rq:/.avg_vruntime.stddev
376.33 ? 43% -53.5% 174.89 ? 34% sched_debug.cfs_rq:/.load_avg.avg
85.75 ? 9% -59.1% 35.08 ? 16% sched_debug.cfs_rq:/.load_avg.min
12305176 +10.3% 13578151 sched_debug.cfs_rq:/.min_vruntime.avg
12419621 +10.6% 13739007 sched_debug.cfs_rq:/.min_vruntime.max
122979 ? 5% +41.3% 173810 ? 12% sched_debug.cfs_rq:/.min_vruntime.stddev
13056 -15.6% 11025 sched_debug.cpu.nr_switches.avg
9228 -22.3% 7174 sched_debug.cpu.nr_switches.min
0.28 ? 7% -63.7% 0.10 ? 10% perf-sched.sch_delay.avg.ms.schedule_timeout.rcu_gp_fqs_loop.rcu_gp_kthread.kthread
0.08 ? 5% -27.0% 0.06 ? 8% perf-sched.sch_delay.avg.ms.smpboot_thread_fn.kthread.ret_from_fork.ret_from_fork_asm
3.56 ? 45% -79.6% 0.73 ?199% perf-sched.sch_delay.max.ms.__cond_resched.smpboot_thread_fn.kthread.ret_from_fork.ret_from_fork_asm
10.02 ? 62% -70.0% 3.01 ? 2% perf-sched.sch_delay.max.ms.schedule_timeout.rcu_gp_fqs_loop.rcu_gp_kthread.kthread
11.16 ? 29% -48.2% 5.78 ? 45% perf-sched.sch_delay.max.ms.wait_for_partner.fifo_open.do_dentry_open.do_open
41.80 +25.8% 52.58 perf-sched.total_wait_and_delay.average.ms
37576 ? 2% -21.0% 29680 perf-sched.total_wait_and_delay.count.ms
41.73 +25.8% 52.50 perf-sched.total_wait_time.average.ms
4.50 ? 2% -16.1% 3.78 ? 6% perf-sched.wait_and_delay.avg.ms.__cond_resched.down_write.__split_vma.do_vmi_align_munmap.__do_sys_brk
4.61 ? 6% -18.0% 3.78 ? 2% perf-sched.wait_and_delay.avg.ms.__cond_resched.down_write.do_brk_flags.__do_sys_brk.do_syscall_64
4.26 ? 7% -11.7% 3.77 perf-sched.wait_and_delay.avg.ms.__cond_resched.kmem_cache_alloc.mas_alloc_nodes.mas_preallocate.__split_vma
32.16 +53.0% 49.20 perf-sched.wait_and_delay.avg.ms.__cond_resched.smpboot_thread_fn.kthread.ret_from_fork.ret_from_fork_asm
63.20 +35.4% 85.56 ? 2% perf-sched.wait_and_delay.avg.ms.smpboot_thread_fn.kthread.ret_from_fork.ret_from_fork_asm
735.00 ? 2% -68.0% 234.83 ? 4% perf-sched.wait_and_delay.count.__cond_resched.down_write.__split_vma.do_vmi_align_munmap.__do_sys_brk
3090 ? 6% -93.8% 190.50 ? 4% perf-sched.wait_and_delay.count.__cond_resched.down_write.do_brk_flags.__do_sys_brk.do_syscall_64
975.67 ? 3% +61.5% 1576 perf-sched.wait_and_delay.count.__cond_resched.down_write_killable.__do_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe
298.17 ? 4% +54.6% 461.00 ? 4% perf-sched.wait_and_delay.count.__cond_resched.kmem_cache_alloc.mas_alloc_nodes.mas_preallocate.__split_vma
524.33 ? 4% +56.2% 819.17 ? 2% perf-sched.wait_and_delay.count.__cond_resched.kmem_cache_alloc.mas_alloc_nodes.mas_preallocate.do_brk_flags
402.83 ? 2% +54.2% 621.17 ? 3% perf-sched.wait_and_delay.count.__cond_resched.kmem_cache_alloc.vm_area_dup.__split_vma.do_vmi_align_munmap
265.50 ? 4% +28.7% 341.67 ? 2% perf-sched.wait_and_delay.count.__cond_resched.remove_vma.do_vmi_align_munmap.__do_sys_brk.do_syscall_64
661.33 ? 7% -27.6% 478.83 ? 10% perf-sched.wait_and_delay.count.__cond_resched.smpboot_thread_fn.kthread.ret_from_fork.ret_from_fork_asm
66.33 ?141% +310.3% 272.17 ? 7% perf-sched.wait_and_delay.count.__cond_resched.zap_pmd_range.isra.0.unmap_page_range
1517 ? 4% +72.0% 2609 perf-sched.wait_and_delay.count.exit_to_user_mode_loop.exit_to_user_mode_prepare.irqentry_exit_to_user_mode.asm_sysvec_apic_timer_interrupt
6322 ? 3% -41.1% 3725 ? 4% perf-sched.wait_and_delay.count.exit_to_user_mode_loop.exit_to_user_mode_prepare.syscall_exit_to_user_mode.do_syscall_64
14299 ? 2% -25.3% 10677 perf-sched.wait_and_delay.count.smpboot_thread_fn.kthread.ret_from_fork.ret_from_fork_asm
19.65 ? 25% -38.8% 12.03 ? 7% perf-sched.wait_and_delay.max.ms.__cond_resched.down_write.__split_vma.do_vmi_align_munmap.__do_sys_brk
20.07 ? 27% -42.3% 11.57 ? 8% perf-sched.wait_and_delay.max.ms.__cond_resched.down_write.do_brk_flags.__do_sys_brk.do_syscall_64
18.62 ? 28% -32.5% 12.56 ? 12% perf-sched.wait_and_delay.max.ms.__cond_resched.kmem_cache_alloc.vm_area_dup.__split_vma.do_vmi_align_munmap
71.03 ? 10% +44.2% 102.39 ? 36% perf-sched.wait_and_delay.max.ms.__cond_resched.smpboot_thread_fn.kthread.ret_from_fork.ret_from_fork_asm
23.72 ? 26% -33.5% 15.79 ? 12% perf-sched.wait_and_delay.max.ms.__cond_resched.unmap_vmas.unmap_region.constprop.0
14.70 ? 21% -33.3% 9.80 ? 2% perf-sched.wait_and_delay.max.ms.schedule_timeout.rcu_gp_fqs_loop.rcu_gp_kthread.kthread
4.50 ? 2% -16.1% 3.78 ? 6% perf-sched.wait_time.avg.ms.__cond_resched.down_write.__split_vma.do_vmi_align_munmap.__do_sys_brk
4.61 ? 6% -18.0% 3.78 ? 2% perf-sched.wait_time.avg.ms.__cond_resched.down_write.do_brk_flags.__do_sys_brk.do_syscall_64
4.26 ? 7% -11.7% 3.77 perf-sched.wait_time.avg.ms.__cond_resched.kmem_cache_alloc.mas_alloc_nodes.mas_preallocate.__split_vma
4.26 ? 9% -100.0% 0.00 perf-sched.wait_time.avg.ms.__cond_resched.kmem_cache_alloc_bulk.mas_alloc_nodes.mas_preallocate.__split_vma
4.61 ? 3% -100.0% 0.00 perf-sched.wait_time.avg.ms.__cond_resched.kmem_cache_alloc_bulk.mas_alloc_nodes.mas_preallocate.do_brk_flags
32.13 +53.1% 49.19 perf-sched.wait_time.avg.ms.__cond_resched.smpboot_thread_fn.kthread.ret_from_fork.ret_from_fork_asm
63.12 +35.5% 85.50 ? 2% perf-sched.wait_time.avg.ms.smpboot_thread_fn.kthread.ret_from_fork.ret_from_fork_asm
19.65 ? 25% -38.8% 12.03 ? 7% perf-sched.wait_time.max.ms.__cond_resched.down_write.__split_vma.do_vmi_align_munmap.__do_sys_brk
20.07 ? 27% -42.3% 11.57 ? 8% perf-sched.wait_time.max.ms.__cond_resched.down_write.do_brk_flags.__do_sys_brk.do_syscall_64
18.62 ? 28% -32.5% 12.56 ? 12% perf-sched.wait_time.max.ms.__cond_resched.kmem_cache_alloc.vm_area_dup.__split_vma.do_vmi_align_munmap
16.69 ? 36% -100.0% 0.00 perf-sched.wait_time.max.ms.__cond_resched.kmem_cache_alloc_bulk.mas_alloc_nodes.mas_preallocate.__split_vma
16.03 ? 17% -100.0% 0.00 perf-sched.wait_time.max.ms.__cond_resched.kmem_cache_alloc_bulk.mas_alloc_nodes.mas_preallocate.do_brk_flags
70.43 ? 10% +45.4% 102.38 ? 36% perf-sched.wait_time.max.ms.__cond_resched.smpboot_thread_fn.kthread.ret_from_fork.ret_from_fork_asm
23.72 ? 26% -33.5% 15.79 ? 12% perf-sched.wait_time.max.ms.__cond_resched.unmap_vmas.unmap_region.constprop.0
17.57 ? 34% -29.3% 12.43 ? 7% perf-sched.wait_time.max.ms.__cond_resched.zap_pmd_range.isra.0.unmap_page_range
8.69 ? 9% -20.8% 6.88 perf-sched.wait_time.max.ms.schedule_timeout.rcu_gp_fqs_loop.rcu_gp_kthread.kthread
2.62 -12.2% 2.30 perf-stat.i.MPKI
2.471e+10 +5.8% 2.614e+10 perf-stat.i.branch-instructions
0.82 +0.1 0.90 ? 3% perf-stat.i.branch-miss-rate%
2.032e+08 +14.1% 2.319e+08 perf-stat.i.branch-misses
61.39 +1.3 62.74 perf-stat.i.cache-miss-rate%
3.567e+08 -14.2% 3.061e+08 perf-stat.i.cache-misses
5.81e+08 -16.2% 4.871e+08 perf-stat.i.cache-references
7695 -18.5% 6271 perf-stat.i.context-switches
2.04 +2.6% 2.09 perf-stat.i.cpi
249.60 -26.8% 182.76 perf-stat.i.cpu-migrations
780.53 +16.7% 911.09 perf-stat.i.cycles-between-cache-misses
0.05 +0.0 0.08 ? 4% perf-stat.i.dTLB-load-miss-rate%
15775916 +75.7% 27724344 perf-stat.i.dTLB-load-misses
3.43e+10 +5.8% 3.63e+10 perf-stat.i.dTLB-loads
459336 ? 4% -18.1% 376380 ? 10% perf-stat.i.dTLB-store-misses
2.189e+10 -2.7% 2.13e+10 perf-stat.i.dTLB-stores
31159069 +37.1% 42716400 perf-stat.i.iTLB-load-misses
456253 ? 4% +83.6% 837671 ? 31% perf-stat.i.iTLB-loads
1.364e+11 -1.9% 1.337e+11 perf-stat.i.instructions
4379 -28.5% 3131 perf-stat.i.instructions-per-iTLB-miss
0.49 -2.1% 0.48 perf-stat.i.ipc
1327 -23.4% 1017 perf-stat.i.metric.K/sec
783.30 +3.4% 809.81 perf-stat.i.metric.M/sec
2733 +2.7% 2807 perf-stat.i.minor-faults
4668970 -23.7% 3562283 ? 12% perf-stat.i.node-load-misses
44341556 -21.0% 35024109 ? 2% perf-stat.i.node-loads
2.44 -0.5 1.91 ? 9% perf-stat.i.node-store-miss-rate%
2146790 -44.9% 1183052 ? 2% perf-stat.i.node-store-misses
85964398 -24.9% 64569512 ? 2% perf-stat.i.node-stores
2733 +2.7% 2807 perf-stat.i.page-faults
2.62 -12.5% 2.29 perf-stat.overall.MPKI
0.82 +0.1 0.89 perf-stat.overall.branch-miss-rate%
61.39 +1.4 62.83 perf-stat.overall.cache-miss-rate%
2.04 +2.1% 2.08 perf-stat.overall.cpi
780.25 +16.6% 910.13 perf-stat.overall.cycles-between-cache-misses
0.05 +0.0 0.08 perf-stat.overall.dTLB-load-miss-rate%
0.00 ? 4% -0.0 0.00 ? 10% perf-stat.overall.dTLB-store-miss-rate%
4376 -28.5% 3130 perf-stat.overall.instructions-per-iTLB-miss
0.49 -2.0% 0.48 perf-stat.overall.ipc
2.44 -0.6 1.80 ? 2% perf-stat.overall.node-store-miss-rate%
3051945 -49.6% 1539638 perf-stat.overall.path-length
2.462e+10 +5.8% 2.605e+10 perf-stat.ps.branch-instructions
2.025e+08 +14.1% 2.311e+08 perf-stat.ps.branch-misses
3.555e+08 -14.2% 3.051e+08 perf-stat.ps.cache-misses
5.791e+08 -16.2% 4.855e+08 perf-stat.ps.cache-references
7668 -18.5% 6250 perf-stat.ps.context-switches
248.68 -26.7% 182.19 perf-stat.ps.cpu-migrations
15739140 +75.6% 27640979 perf-stat.ps.dTLB-load-misses
3.418e+10 +5.8% 3.618e+10 perf-stat.ps.dTLB-loads
458389 ? 4% -18.1% 375627 ? 10% perf-stat.ps.dTLB-store-misses
2.181e+10 -2.7% 2.123e+10 perf-stat.ps.dTLB-stores
31053977 +37.1% 42572874 perf-stat.ps.iTLB-load-misses
454414 ? 4% +83.8% 835372 ? 31% perf-stat.ps.iTLB-loads
1.359e+11 -1.9% 1.333e+11 perf-stat.ps.instructions
2730 +2.6% 2802 perf-stat.ps.minor-faults
4653258 -23.7% 3549888 ? 12% perf-stat.ps.node-load-misses
44203348 -21.0% 34917073 ? 2% perf-stat.ps.node-loads
2139791 -44.9% 1179122 ? 2% perf-stat.ps.node-store-misses
85677729 -24.9% 64357015 ? 2% perf-stat.ps.node-stores
2731 +2.6% 2803 perf-stat.ps.page-faults
4.11e+13 -1.8% 4.038e+13 perf-stat.total.instructions
33.52 -19.0 14.50 perf-profile.calltrace.cycles-pp.do_brk_flags.__do_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe.brk
17.05 -14.1 2.93 perf-profile.calltrace.cycles-pp.mas_store_prealloc.do_brk_flags.__do_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe
11.58 -11.6 0.00 perf-profile.calltrace.cycles-pp.___slab_alloc.__kmem_cache_alloc_bulk.kmem_cache_alloc_bulk.mas_alloc_nodes.mas_preallocate
10.92 -10.9 0.00 perf-profile.calltrace.cycles-pp.kmem_cache_alloc_bulk.mas_alloc_nodes.mas_preallocate.do_brk_flags.__do_sys_brk
10.60 -10.6 0.00 perf-profile.calltrace.cycles-pp.__kmem_cache_alloc_bulk.kmem_cache_alloc_bulk.mas_alloc_nodes.mas_preallocate.do_brk_flags
10.54 -10.5 0.00 perf-profile.calltrace.cycles-pp.mas_wr_bnode.mas_store_prealloc.vma_complete.__split_vma.do_vmi_align_munmap
10.26 -10.3 0.00 perf-profile.calltrace.cycles-pp.mas_wr_spanning_store.mas_store_prealloc.do_brk_flags.__do_sys_brk.do_syscall_64
11.70 -9.9 1.78 perf-profile.calltrace.cycles-pp.mas_alloc_nodes.mas_preallocate.do_brk_flags.__do_sys_brk.do_syscall_64
12.19 -9.2 2.97 perf-profile.calltrace.cycles-pp.mas_preallocate.do_brk_flags.__do_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe
69.63 -9.1 60.49 perf-profile.calltrace.cycles-pp.__do_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe.brk
8.93 -8.9 0.00 perf-profile.calltrace.cycles-pp.mas_split.mas_wr_bnode.mas_store_prealloc.vma_complete.__split_vma
7.42 -7.4 0.00 perf-profile.calltrace.cycles-pp.get_partial_node.___slab_alloc.__kmem_cache_alloc_bulk.kmem_cache_alloc_bulk.mas_alloc_nodes
7.32 -7.3 0.00 perf-profile.calltrace.cycles-pp.mas_spanning_rebalance.mas_wr_spanning_store.mas_store_prealloc.do_brk_flags.__do_sys_brk
12.16 -6.0 6.13 perf-profile.calltrace.cycles-pp.mas_store_prealloc.vma_complete.__split_vma.do_vmi_align_munmap.__do_sys_brk
12.28 -5.9 6.43 perf-profile.calltrace.cycles-pp.vma_complete.__split_vma.do_vmi_align_munmap.__do_sys_brk.do_syscall_64
6.38 -5.6 0.73 ? 2% perf-profile.calltrace.cycles-pp.mas_destroy.mas_store_prealloc.do_brk_flags.__do_sys_brk.do_syscall_64
15.46 -5.0 10.49 ? 4% perf-profile.calltrace.cycles-pp.smpboot_thread_fn.kthread.ret_from_fork.ret_from_fork_asm
15.44 -5.0 10.48 ? 4% perf-profile.calltrace.cycles-pp.__do_softirq.run_ksoftirqd.smpboot_thread_fn.kthread.ret_from_fork
15.44 -5.0 10.48 ? 4% perf-profile.calltrace.cycles-pp.run_ksoftirqd.smpboot_thread_fn.kthread.ret_from_fork.ret_from_fork_asm
15.47 -5.0 10.50 ? 4% perf-profile.calltrace.cycles-pp.ret_from_fork_asm
15.47 -5.0 10.50 ? 4% perf-profile.calltrace.cycles-pp.ret_from_fork.ret_from_fork_asm
15.47 -5.0 10.50 ? 4% perf-profile.calltrace.cycles-pp.kthread.ret_from_fork.ret_from_fork_asm
15.44 -5.0 10.48 ? 4% perf-profile.calltrace.cycles-pp.rcu_core.__do_softirq.run_ksoftirqd.smpboot_thread_fn.kthread
15.42 -5.0 10.46 ? 4% perf-profile.calltrace.cycles-pp.rcu_do_batch.rcu_core.__do_softirq.run_ksoftirqd.smpboot_thread_fn
74.20 -4.5 69.66 perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.brk
20.44 -3.4 17.09 perf-profile.calltrace.cycles-pp.__split_vma.do_vmi_align_munmap.__do_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe
3.84 -2.5 1.34 ? 4% perf-profile.calltrace.cycles-pp.__slab_free.rcu_do_batch.rcu_core.__do_softirq.run_ksoftirqd
76.40 -2.4 74.03 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe.brk
4.90 ? 2% -2.0 2.86 ? 4% perf-profile.calltrace.cycles-pp.rcu_core.__do_softirq.irq_exit_rcu.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt
4.89 ? 2% -2.0 2.84 ? 4% perf-profile.calltrace.cycles-pp.rcu_do_batch.rcu_core.__do_softirq.irq_exit_rcu.sysvec_apic_timer_interrupt
2.88 -1.9 1.03 perf-profile.calltrace.cycles-pp.mas_alloc_nodes.mas_preallocate.__split_vma.do_vmi_align_munmap.__do_sys_brk
3.53 -1.3 2.22 perf-profile.calltrace.cycles-pp.mas_preallocate.__split_vma.do_vmi_align_munmap.__do_sys_brk.do_syscall_64
0.95 ? 3% -0.2 0.71 ? 4% perf-profile.calltrace.cycles-pp.rcu_cblist_dequeue.rcu_do_batch.rcu_core.__do_softirq.run_ksoftirqd
0.71 -0.1 0.62 ? 2% perf-profile.calltrace.cycles-pp.kmem_cache_free.rcu_do_batch.rcu_core.__do_softirq.run_ksoftirqd
0.74 ? 3% +0.2 0.94 ? 4% perf-profile.calltrace.cycles-pp.__unfreeze_partials.rcu_do_batch.rcu_core.__do_softirq.irq_exit_rcu
0.67 +0.3 0.97 ? 3% perf-profile.calltrace.cycles-pp.vm_area_free_rcu_cb.rcu_do_batch.rcu_core.__do_softirq.run_ksoftirqd
0.56 ? 2% +0.4 0.97 ? 5% perf-profile.calltrace.cycles-pp.irq_exit_rcu.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt.syscall_enter_from_user_mode.do_syscall_64
0.56 ? 2% +0.4 0.97 ? 5% perf-profile.calltrace.cycles-pp.__do_softirq.irq_exit_rcu.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt.syscall_enter_from_user_mode
0.58 ? 2% +0.4 1.01 ? 5% perf-profile.calltrace.cycles-pp.asm_sysvec_apic_timer_interrupt.syscall_enter_from_user_mode.do_syscall_64.entry_SYSCALL_64_after_hwframe.brk
0.58 ? 2% +0.4 1.01 ? 5% perf-profile.calltrace.cycles-pp.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt.syscall_enter_from_user_mode.do_syscall_64.entry_SYSCALL_64_after_hwframe
0.00 +0.5 0.51 perf-profile.calltrace.cycles-pp.mas_pop_node.mas_wr_node_store.mas_wr_store_entry.mas_store_gfp.do_vmi_align_munmap
0.00 +0.5 0.52 ? 2% perf-profile.calltrace.cycles-pp.__pte_offset_map_lock.zap_pte_range.zap_pmd_range.unmap_page_range.unmap_vmas
0.00 +0.5 0.53 ? 2% perf-profile.calltrace.cycles-pp.mas_pop_node.mas_wr_node_store.mas_wr_store_entry.mas_store_prealloc.vma_complete
0.00 +0.5 0.54 perf-profile.calltrace.cycles-pp.mas_update_gap.mas_wr_node_store.mas_wr_store_entry.mas_store_prealloc.vma_complete
0.43 ? 44% +0.5 0.97 perf-profile.calltrace.cycles-pp.zap_pte_range.zap_pmd_range.unmap_page_range.unmap_vmas.unmap_region
0.00 +0.5 0.55 perf-profile.calltrace.cycles-pp.arch_get_unmapped_area_topdown.get_unmapped_area.check_brk_limits.__do_sys_brk.do_syscall_64
0.63 ? 2% +0.6 1.18 perf-profile.calltrace.cycles-pp.get_unmapped_area.check_brk_limits.__do_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe
0.00 +0.6 0.56 ? 3% perf-profile.calltrace.cycles-pp.kmem_cache_free.mas_destroy.mas_store_prealloc.do_brk_flags.__do_sys_brk
6.03 ? 2% +0.6 6.62 ? 4% perf-profile.calltrace.cycles-pp.__unfreeze_partials.rcu_do_batch.rcu_core.__do_softirq.run_ksoftirqd
0.71 ? 2% +0.6 1.31 ? 4% perf-profile.calltrace.cycles-pp.syscall_enter_from_user_mode.do_syscall_64.entry_SYSCALL_64_after_hwframe.brk
0.00 +0.6 0.63 ? 2% perf-profile.calltrace.cycles-pp.mas_update_gap.mas_wr_slot_store.mas_wr_store_entry.mas_store_prealloc.do_brk_flags
0.73 ? 2% +0.6 1.36 perf-profile.calltrace.cycles-pp.check_brk_limits.__do_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe.brk
0.00 +0.7 0.68 perf-profile.calltrace.cycles-pp.obj_cgroup_charge.kmem_cache_alloc.vm_area_dup.__split_vma.do_vmi_align_munmap
0.00 +0.7 0.69 perf-profile.calltrace.cycles-pp.___slab_alloc.kmem_cache_alloc.mas_alloc_nodes.mas_preallocate.do_brk_flags
0.74 ? 2% +0.7 1.46 perf-profile.calltrace.cycles-pp.zap_pmd_range.unmap_page_range.unmap_vmas.unmap_region.do_vmi_align_munmap
0.00 +0.7 0.72 perf-profile.calltrace.cycles-pp.___slab_alloc.kmem_cache_alloc.mas_alloc_nodes.mas_wr_node_store.mas_wr_store_entry
0.00 +0.7 0.72 perf-profile.calltrace.cycles-pp.kmem_cache_alloc.mas_alloc_nodes.mas_preallocate.__split_vma.do_vmi_align_munmap
0.00 +0.7 0.74 perf-profile.calltrace.cycles-pp.allocate_slab.___slab_alloc.kmem_cache_alloc.vm_area_dup.__split_vma
0.72 +0.7 1.46 perf-profile.calltrace.cycles-pp.memcg_slab_post_alloc_hook.kmem_cache_alloc.vm_area_dup.__split_vma.do_vmi_align_munmap
0.00 +0.8 0.76 perf-profile.calltrace.cycles-pp.userfaultfd_unmap_complete.__do_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe.brk
0.00 +0.8 0.78 perf-profile.calltrace.cycles-pp.down_write_killable.__do_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe.brk
0.00 +0.8 0.80 ? 2% perf-profile.calltrace.cycles-pp.free_pgtables.unmap_region.do_vmi_align_munmap.__do_sys_brk.do_syscall_64
1.00 ? 5% +0.9 1.89 ? 4% perf-profile.calltrace.cycles-pp.__do_softirq.irq_exit_rcu.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt.brk
1.00 ? 5% +0.9 1.89 ? 4% perf-profile.calltrace.cycles-pp.irq_exit_rcu.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt.brk
0.00 +0.9 0.89 perf-profile.calltrace.cycles-pp.mas_wr_slot_store.mas_wr_store_entry.mas_store_prealloc.do_brk_flags.__do_sys_brk
1.03 ? 5% +0.9 1.94 ? 4% perf-profile.calltrace.cycles-pp.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt.brk
0.56 +0.9 1.48 perf-profile.calltrace.cycles-pp.kmem_cache_alloc.mas_alloc_nodes.mas_preallocate.do_brk_flags.__do_sys_brk
1.04 ? 4% +0.9 1.96 ? 4% perf-profile.calltrace.cycles-pp.asm_sysvec_apic_timer_interrupt.brk
0.00 +1.0 0.98 perf-profile.calltrace.cycles-pp.___slab_alloc.kmem_cache_alloc.vm_area_dup.__split_vma.do_vmi_align_munmap
0.25 ?100% +1.0 1.24 ? 2% perf-profile.calltrace.cycles-pp.mtree_range_walk.mas_walk.mas_find.__do_sys_brk.do_syscall_64
0.75 +1.0 1.74 perf-profile.calltrace.cycles-pp.mas_walk.mas_find.__do_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe
0.55 +1.0 1.57 ? 2% perf-profile.calltrace.cycles-pp.__call_rcu_common.do_vmi_align_munmap.__do_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe
1.13 ? 2% +1.1 2.18 perf-profile.calltrace.cycles-pp.perf_event_mmap_output.perf_iterate_sb.perf_event_mmap_event.perf_event_mmap.do_brk_flags
0.95 +1.1 2.03 perf-profile.calltrace.cycles-pp.mas_find.__do_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe.brk
1.30 ? 2% +1.2 2.49 perf-profile.calltrace.cycles-pp.unmap_page_range.unmap_vmas.unmap_region.do_vmi_align_munmap.__do_sys_brk
0.00 +1.3 1.28 perf-profile.calltrace.cycles-pp.kmem_cache_alloc.mas_alloc_nodes.mas_wr_node_store.mas_wr_store_entry.mas_store_gfp
1.50 +1.4 2.90 perf-profile.calltrace.cycles-pp.__entry_text_start.brk
1.62 +1.5 3.08 perf-profile.calltrace.cycles-pp.perf_iterate_sb.perf_event_mmap_event.perf_event_mmap.do_brk_flags.__do_sys_brk
1.78 +1.5 3.28 perf-profile.calltrace.cycles-pp.unmap_vmas.unmap_region.do_vmi_align_munmap.__do_sys_brk.do_syscall_64
0.00 +1.5 1.52 ? 2% perf-profile.calltrace.cycles-pp.__call_rcu_common.mas_wr_node_store.mas_wr_store_entry.mas_store_gfp.do_vmi_align_munmap
0.00 +1.5 1.52 perf-profile.calltrace.cycles-pp.mas_alloc_nodes.mas_wr_node_store.mas_wr_store_entry.mas_store_gfp.do_vmi_align_munmap
0.00 +1.5 1.53 perf-profile.calltrace.cycles-pp.__call_rcu_common.mas_wr_node_store.mas_wr_store_entry.mas_store_prealloc.vma_complete
0.00 +1.7 1.74 perf-profile.calltrace.cycles-pp.mas_wr_store_entry.mas_store_prealloc.do_brk_flags.__do_sys_brk.do_syscall_64
0.00 +1.9 1.90 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_safe_stack.brk
2.35 +2.2 4.51 perf-profile.calltrace.cycles-pp.perf_event_mmap_event.perf_event_mmap.do_brk_flags.__do_sys_brk.do_syscall_64
2.30 +2.4 4.65 perf-profile.calltrace.cycles-pp.kmem_cache_alloc.vm_area_dup.__split_vma.do_vmi_align_munmap.__do_sys_brk
2.62 +2.5 5.10 perf-profile.calltrace.cycles-pp.perf_event_mmap.do_brk_flags.__do_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe
3.12 +2.6 5.70 perf-profile.calltrace.cycles-pp.unmap_region.do_vmi_align_munmap.__do_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe
2.74 +2.8 5.53 perf-profile.calltrace.cycles-pp.vm_area_dup.__split_vma.do_vmi_align_munmap.__do_sys_brk.do_syscall_64
4.28 ? 3% +2.9 7.16 ? 4% perf-profile.calltrace.cycles-pp._raw_spin_lock_irqsave.free_pcppages_bulk.free_unref_page_commit.free_unref_page.__unfreeze_partials
4.38 ? 3% +2.9 7.31 ? 4% perf-profile.calltrace.cycles-pp.free_pcppages_bulk.free_unref_page_commit.free_unref_page.__unfreeze_partials.rcu_do_batch
4.41 ? 3% +2.9 7.35 ? 4% perf-profile.calltrace.cycles-pp.free_unref_page_commit.free_unref_page.__unfreeze_partials.rcu_do_batch.rcu_core
4.43 ? 3% +3.0 7.38 ? 4% perf-profile.calltrace.cycles-pp.free_unref_page.__unfreeze_partials.rcu_do_batch.rcu_core.__do_softirq
3.44 +3.5 6.99 perf-profile.calltrace.cycles-pp.syscall_exit_to_user_mode.do_syscall_64.entry_SYSCALL_64_after_hwframe.brk
3.91 +3.8 7.74 perf-profile.calltrace.cycles-pp.syscall_return_via_sysret.brk
4.63 +4.3 8.91 perf-profile.calltrace.cycles-pp.mas_store_gfp.do_vmi_align_munmap.__do_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe
83.68 +4.7 88.36 perf-profile.calltrace.cycles-pp.brk
0.00 +4.8 4.76 perf-profile.calltrace.cycles-pp.mas_wr_node_store.mas_wr_store_entry.mas_store_prealloc.vma_complete.__split_vma
0.00 +5.5 5.54 perf-profile.calltrace.cycles-pp.mas_wr_store_entry.mas_store_prealloc.vma_complete.__split_vma.do_vmi_align_munmap
32.01 +6.3 38.28 perf-profile.calltrace.cycles-pp.do_vmi_align_munmap.__do_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe.brk
0.00 +6.4 6.35 perf-profile.calltrace.cycles-pp.mas_wr_node_store.mas_wr_store_entry.mas_store_gfp.do_vmi_align_munmap.__do_sys_brk
0.82 +6.7 7.53 perf-profile.calltrace.cycles-pp.mas_wr_store_entry.mas_store_gfp.do_vmi_align_munmap.__do_sys_brk.do_syscall_64
29.25 -20.1 9.14 perf-profile.children.cycles-pp.mas_store_prealloc
33.60 -18.9 14.67 perf-profile.children.cycles-pp.do_brk_flags
27.84 -17.3 10.50 ? 2% perf-profile.children.cycles-pp._raw_spin_lock_irqsave
27.53 -17.1 10.38 ? 2% perf-profile.children.cycles-pp.native_queued_spin_lock_slowpath
13.75 -13.7 0.00 perf-profile.children.cycles-pp.mas_wr_bnode
13.22 -13.2 0.00 perf-profile.children.cycles-pp.kmem_cache_alloc_bulk
12.52 -12.5 0.00 perf-profile.children.cycles-pp.__kmem_cache_alloc_bulk
15.06 -10.7 4.36 perf-profile.children.cycles-pp.mas_alloc_nodes
15.78 -10.5 5.29 perf-profile.children.cycles-pp.mas_preallocate
10.28 -10.3 0.00 perf-profile.children.cycles-pp.mas_wr_spanning_store
12.34 -9.9 2.40 perf-profile.children.cycles-pp.___slab_alloc
9.30 -9.2 0.09 ? 4% perf-profile.children.cycles-pp.get_partial_node
69.68 -9.1 60.59 perf-profile.children.cycles-pp.__do_sys_brk
8.99 -9.0 0.00 perf-profile.children.cycles-pp.mas_split
27.56 -8.0 19.53 perf-profile.children.cycles-pp.rcu_do_batch
27.59 -8.0 19.56 perf-profile.children.cycles-pp.__do_softirq
27.58 -8.0 19.55 perf-profile.children.cycles-pp.rcu_core
7.37 -7.4 0.00 perf-profile.children.cycles-pp.mas_spanning_rebalance
7.54 -6.5 1.02 perf-profile.children.cycles-pp.mas_destroy
5.92 -5.9 0.00 perf-profile.children.cycles-pp.mas_topiary_replace
12.39 -5.8 6.61 perf-profile.children.cycles-pp.vma_complete
15.46 -5.0 10.49 ? 4% perf-profile.children.cycles-pp.smpboot_thread_fn
15.44 -5.0 10.48 ? 4% perf-profile.children.cycles-pp.run_ksoftirqd
15.47 -5.0 10.50 ? 4% perf-profile.children.cycles-pp.ret_from_fork_asm
15.47 -5.0 10.50 ? 4% perf-profile.children.cycles-pp.ret_from_fork
15.47 -5.0 10.50 ? 4% perf-profile.children.cycles-pp.kthread
8.32 -4.6 3.78 ? 2% perf-profile.children.cycles-pp.__slab_free
74.27 -4.5 69.76 perf-profile.children.cycles-pp.do_syscall_64
15.32 -4.2 11.08 ? 2% perf-profile.children.cycles-pp.__unfreeze_partials
20.53 -3.3 17.27 perf-profile.children.cycles-pp.__split_vma
12.15 ? 2% -3.1 9.09 ? 3% perf-profile.children.cycles-pp.irq_exit_rcu
12.47 ? 2% -3.0 9.42 ? 3% perf-profile.children.cycles-pp.sysvec_apic_timer_interrupt
12.50 ? 2% -3.0 9.46 ? 3% perf-profile.children.cycles-pp.asm_sysvec_apic_timer_interrupt
76.50 -2.3 74.18 perf-profile.children.cycles-pp.entry_SYSCALL_64_after_hwframe
1.91 ? 4% -1.8 0.16 ? 3% perf-profile.children.cycles-pp.get_any_partial
1.09 -0.9 0.14 ? 2% perf-profile.children.cycles-pp.memcpy_orig
1.72 -0.7 1.05 perf-profile.children.cycles-pp.mas_pop_node
1.14 -0.2 0.98 ? 2% perf-profile.children.cycles-pp.mas_prev_slot
1.71 ? 2% -0.1 1.57 ? 4% perf-profile.children.cycles-pp.rcu_cblist_dequeue
1.10 -0.1 0.98 perf-profile.children.cycles-pp.mas_next_slot
0.32 ? 2% -0.1 0.22 ? 3% perf-profile.children.cycles-pp.inc_slabs_node
0.60 ? 2% -0.1 0.52 perf-profile.children.cycles-pp.rcu_segcblist_enqueue
0.48 ? 2% -0.1 0.40 ? 2% perf-profile.children.cycles-pp.rcu_nocb_try_bypass
0.47 ? 2% -0.1 0.40 perf-profile.children.cycles-pp.alloc_pages_mpol
0.38 ? 3% -0.1 0.31 ? 2% perf-profile.children.cycles-pp.get_page_from_freelist
0.18 ? 2% -0.1 0.11 perf-profile.children.cycles-pp.__list_del_entry_valid_or_report
0.44 ? 3% -0.1 0.37 perf-profile.children.cycles-pp.__alloc_pages
0.27 ? 2% -0.1 0.22 ? 4% perf-profile.children.cycles-pp.mt_free_rcu
0.25 ? 3% -0.1 0.20 ? 3% perf-profile.children.cycles-pp.rmqueue
0.20 ? 6% -0.0 0.16 ? 3% perf-profile.children.cycles-pp.__rmqueue_pcplist
0.15 ? 3% -0.0 0.11 ? 5% perf-profile.children.cycles-pp.discard_slab
0.16 ? 4% -0.0 0.12 ? 3% perf-profile.children.cycles-pp.rmqueue_bulk
0.08 ? 5% -0.0 0.06 perf-profile.children.cycles-pp.__list_add_valid_or_report
0.24 ? 2% -0.0 0.22 ? 2% perf-profile.children.cycles-pp.__free_one_page
0.19 ? 2% +0.0 0.21 ? 3% perf-profile.children.cycles-pp.update_process_times
0.44 ? 2% +0.0 0.46 ? 4% perf-profile.children.cycles-pp.setup_object
1.00 +0.0 1.03 perf-profile.children.cycles-pp.shuffle_freelist
0.20 ? 3% +0.0 0.24 ? 4% perf-profile.children.cycles-pp.should_failslab
0.09 ? 4% +0.0 0.14 ? 3% perf-profile.children.cycles-pp.strlen
0.06 +0.0 0.11 ? 4% perf-profile.children.cycles-pp.__kmalloc_node
0.06 ? 8% +0.0 0.10 ? 4% perf-profile.children.cycles-pp.__init_rwsem
0.05 +0.0 0.10 ? 3% perf-profile.children.cycles-pp.__kmem_cache_alloc_node
0.00 +0.1 0.05 perf-profile.children.cycles-pp.memcg_account_kmem
0.00 +0.1 0.05 perf-profile.children.cycles-pp.testcase
0.06 +0.1 0.11 ? 4% perf-profile.children.cycles-pp.memcg_alloc_slab_cgroups
0.05 ? 7% +0.1 0.10 ? 4% perf-profile.children.cycles-pp.__pte_offset_map
0.00 +0.1 0.05 ? 8% perf-profile.children.cycles-pp.flush_tlb_batched_pending
0.00 +0.1 0.06 ? 8% perf-profile.children.cycles-pp.__free_slab
0.02 ?141% +0.1 0.08 ? 18% perf-profile.children.cycles-pp.machine__process_mmap2_event
0.07 ? 13% +0.1 0.13 ? 5% perf-profile.children.cycles-pp.may_expand_vm
0.05 ? 50% +0.1 0.11 ? 18% perf-profile.children.cycles-pp.perf_session__process_user_event
0.05 ? 50% +0.1 0.11 ? 18% perf-profile.children.cycles-pp.__ordered_events__flush
0.00 +0.1 0.06 ? 6% perf-profile.children.cycles-pp.memset_orig
0.12 ? 3% +0.1 0.18 ? 2% perf-profile.children.cycles-pp.anon_vma_clone
0.08 ? 4% +0.1 0.14 ? 3% perf-profile.children.cycles-pp.vma_dup_policy
0.07 ? 6% +0.1 0.14 ? 2% perf-profile.children.cycles-pp.free_pgd_range
0.03 ?100% +0.1 0.10 ? 20% perf-profile.children.cycles-pp.perf_session__deliver_event
0.00 +0.1 0.06 ? 7% perf-profile.children.cycles-pp.mas_prev
0.11 ? 3% +0.1 0.18 ? 2% perf-profile.children.cycles-pp.mas_node_count_gfp
0.01 ?223% +0.1 0.08 perf-profile.children.cycles-pp.tlb_batch_pages_flush
0.11 ? 6% +0.1 0.18 ? 2% perf-profile.children.cycles-pp.unmap_single_vma
1.17 +0.1 1.24 ? 2% perf-profile.children.cycles-pp.mtree_range_walk
0.09 ? 5% +0.1 0.17 ? 2% perf-profile.children.cycles-pp.up_read
0.02 ?141% +0.1 0.10 ? 6% perf-profile.children.cycles-pp.vma_prepare
0.06 ? 6% +0.1 0.14 ? 3% perf-profile.children.cycles-pp.can_vma_merge_after
0.10 ? 10% +0.1 0.19 ? 6% perf-profile.children.cycles-pp.kfree
0.08 ? 6% +0.1 0.16 ? 3% perf-profile.children.cycles-pp.strnlen
0.10 ? 4% +0.1 0.20 ? 2% perf-profile.children.cycles-pp.lru_add_drain_cpu
0.18 ? 2% +0.1 0.27 perf-profile.children.cycles-pp.tlb_gather_mmu
0.09 +0.1 0.19 ? 2% perf-profile.children.cycles-pp.refill_obj_stock
0.00 +0.1 0.10 ? 4% perf-profile.children.cycles-pp.mlock_drain_local
0.10 ? 5% +0.1 0.20 ? 2% perf-profile.children.cycles-pp.unlink_anon_vmas
0.11 ? 4% +0.1 0.21 ? 3% perf-profile.children.cycles-pp.khugepaged_enter_vma
0.10 ? 5% +0.1 0.20 perf-profile.children.cycles-pp.current_obj_cgroup
0.10 ? 6% +0.1 0.20 ? 2% perf-profile.children.cycles-pp.syscall_exit_to_user_mode_prepare
0.12 ? 5% +0.1 0.23 ? 3% perf-profile.children.cycles-pp._raw_spin_lock
0.14 ? 4% +0.1 0.26 perf-profile.children.cycles-pp.cap_mmap_addr
0.15 ? 6% +0.1 0.27 perf-profile.children.cycles-pp.exit_to_user_mode_prepare
0.10 ? 3% +0.1 0.23 perf-profile.children.cycles-pp.downgrade_write
0.14 ? 3% +0.1 0.28 perf-profile.children.cycles-pp.remove_vma
2.56 +0.1 2.70 perf-profile.children.cycles-pp.kmem_cache_free
0.00 +0.1 0.14 ? 2% perf-profile.children.cycles-pp.mas_is_err
0.14 ? 3% +0.1 0.28 perf-profile.children.cycles-pp.lru_add_drain
0.08 ? 5% +0.1 0.22 ? 2% perf-profile.children.cycles-pp.__vm_enough_memory
0.15 ? 3% +0.1 0.30 ? 2% perf-profile.children.cycles-pp.__x64_sys_brk
0.15 ? 3% +0.1 0.30 ? 2% perf-profile.children.cycles-pp.vma_adjust_trans_huge
0.22 ? 2% +0.2 0.38 ? 3% perf-profile.children.cycles-pp.rcu_all_qs
0.06 +0.2 0.24 ? 2% perf-profile.children.cycles-pp.mas_prev_range
0.16 ? 4% +0.2 0.35 perf-profile.children.cycles-pp.mas_wr_store_setup
0.24 ? 3% +0.2 0.42 perf-profile.children.cycles-pp.tlb_finish_mmu
0.22 ? 3% +0.2 0.41 perf-profile.children.cycles-pp.security_mmap_addr
0.20 ? 3% +0.2 0.39 ? 2% perf-profile.children.cycles-pp.cap_vm_enough_memory
0.17 ? 5% +0.2 0.36 ? 2% perf-profile.children.cycles-pp.percpu_counter_add_batch
0.14 ? 6% +0.2 0.34 ? 2% perf-profile.children.cycles-pp.strscpy
0.01 ?223% +0.2 0.24 perf-profile.children.cycles-pp.mas_wr_append
0.19 ? 4% +0.2 0.43 ? 2% perf-profile.children.cycles-pp.mas_nomem
0.25 +0.2 0.50 ? 2% perf-profile.children.cycles-pp.security_vm_enough_memory_mm
0.26 +0.3 0.51 ? 2% perf-profile.children.cycles-pp.entry_SYSRETQ_unsafe_stack
0.27 ? 2% +0.3 0.53 ? 2% perf-profile.children.cycles-pp.__pte_offset_map_lock
0.27 ? 2% +0.3 0.56 perf-profile.children.cycles-pp.arch_get_unmapped_area_topdown
0.35 ? 2% +0.3 0.68 perf-profile.children.cycles-pp.obj_cgroup_charge
0.36 ? 2% +0.4 0.72 ? 2% perf-profile.children.cycles-pp.mod_objcg_state
0.39 ? 3% +0.4 0.78 perf-profile.children.cycles-pp.up_write
0.44 ? 2% +0.4 0.85 ? 2% perf-profile.children.cycles-pp.free_pgtables
0.35 +0.4 0.77 perf-profile.children.cycles-pp.userfaultfd_unmap_complete
0.38 ? 2% +0.4 0.81 perf-profile.children.cycles-pp.down_write_killable
0.56 +0.4 1.01 ? 2% perf-profile.children.cycles-pp.down_write
0.53 ? 2% +0.5 1.00 perf-profile.children.cycles-pp.zap_pte_range
0.31 ? 2% +0.5 0.82 perf-profile.children.cycles-pp.mas_wr_end_piv
0.56 +0.5 1.10 perf-profile.children.cycles-pp.mas_leaf_max_gap
0.89 +0.6 1.45 perf-profile.children.cycles-pp.__cond_resched
0.64 ? 2% +0.6 1.20 perf-profile.children.cycles-pp.get_unmapped_area
0.72 ? 2% +0.6 1.32 ? 4% perf-profile.children.cycles-pp.syscall_enter_from_user_mode
0.48 ? 2% +0.6 1.08 perf-profile.children.cycles-pp.entry_SYSCALL_64_safe_stack
0.73 ? 2% +0.6 1.37 perf-profile.children.cycles-pp.check_brk_limits
0.77 ? 2% +0.7 1.50 perf-profile.children.cycles-pp.zap_pmd_range
0.94 +0.8 1.77 perf-profile.children.cycles-pp.memcg_slab_post_alloc_hook
0.68 +0.8 1.52 perf-profile.children.cycles-pp.mas_wr_walk
0.00 +0.9 0.90 perf-profile.children.cycles-pp.mas_wr_slot_store
1.22 +0.9 2.17 perf-profile.children.cycles-pp.vm_area_free_rcu_cb
1.14 ? 2% +1.1 2.20 perf-profile.children.cycles-pp.perf_event_mmap_output
0.91 +1.1 2.02 perf-profile.children.cycles-pp.mas_walk
1.32 +1.2 2.54 perf-profile.children.cycles-pp.unmap_page_range
3.44 +1.3 4.69 perf-profile.children.cycles-pp.__call_rcu_common
0.33 ? 4% +1.4 1.74 perf-profile.children.cycles-pp.mas_update_gap
1.63 +1.5 3.10 perf-profile.children.cycles-pp.perf_iterate_sb
1.79 +1.5 3.30 perf-profile.children.cycles-pp.unmap_vmas
1.60 +1.6 3.19 perf-profile.children.cycles-pp.mas_find
1.85 +1.9 3.73 perf-profile.children.cycles-pp.__entry_text_start
2.39 +2.2 4.60 perf-profile.children.cycles-pp.perf_event_mmap_event
2.62 +2.5 5.12 perf-profile.children.cycles-pp.perf_event_mmap
3.15 +2.6 5.79 perf-profile.children.cycles-pp.unmap_region
2.75 +2.8 5.55 perf-profile.children.cycles-pp.vm_area_dup
3.46 +3.6 7.04 perf-profile.children.cycles-pp.syscall_exit_to_user_mode
3.94 +3.9 7.80 perf-profile.children.cycles-pp.syscall_return_via_sysret
4.68 +4.3 9.03 perf-profile.children.cycles-pp.mas_store_gfp
3.74 +4.7 8.40 perf-profile.children.cycles-pp.kmem_cache_alloc
83.90 +4.9 88.80 perf-profile.children.cycles-pp.brk
32.12 +6.4 38.51 perf-profile.children.cycles-pp.do_vmi_align_munmap
0.24 ? 2% +11.0 11.20 perf-profile.children.cycles-pp.mas_wr_node_store
1.38 +13.6 14.95 perf-profile.children.cycles-pp.mas_wr_store_entry
27.53 -17.1 10.38 ? 2% perf-profile.self.cycles-pp.native_queued_spin_lock_slowpath
4.60 -0.8 3.76 ? 2% perf-profile.self.cycles-pp.__slab_free
0.94 -0.8 0.12 ? 4% perf-profile.self.cycles-pp.memcpy_orig
1.52 -0.6 0.94 perf-profile.self.cycles-pp.mas_pop_node
0.79 -0.5 0.30 perf-profile.self.cycles-pp.___slab_alloc
0.31 -0.2 0.12 ? 3% perf-profile.self.cycles-pp._raw_spin_lock_irqsave
0.28 ? 3% -0.2 0.09 ? 5% perf-profile.self.cycles-pp.__unfreeze_partials
1.68 ? 2% -0.1 1.55 ? 5% perf-profile.self.cycles-pp.rcu_cblist_dequeue
2.14 -0.1 2.02 perf-profile.self.cycles-pp.kmem_cache_free
0.37 ? 2% -0.1 0.28 perf-profile.self.cycles-pp.rcu_nocb_try_bypass
0.30 ? 2% -0.1 0.22 ? 3% perf-profile.self.cycles-pp.inc_slabs_node
0.52 ? 2% -0.1 0.46 ? 2% perf-profile.self.cycles-pp.rcu_segcblist_enqueue
0.17 ? 2% -0.1 0.10 ? 4% perf-profile.self.cycles-pp.__list_del_entry_valid_or_report
0.26 -0.0 0.21 ? 4% perf-profile.self.cycles-pp.mt_free_rcu
0.15 ? 3% -0.0 0.11 ? 3% perf-profile.self.cycles-pp.discard_slab
0.17 ? 2% -0.0 0.14 ? 2% perf-profile.self.cycles-pp.get_any_partial
0.08 ? 5% -0.0 0.06 perf-profile.self.cycles-pp.__list_add_valid_or_report
0.15 ? 3% -0.0 0.13 ? 3% perf-profile.self.cycles-pp.__free_one_page
0.10 ? 3% +0.0 0.12 ? 4% perf-profile.self.cycles-pp.rcu_segcblist_pend_cbs
0.08 ? 10% +0.0 0.10 ? 4% perf-profile.self.cycles-pp.should_failslab
0.08 +0.0 0.12 ? 3% perf-profile.self.cycles-pp.strlen
0.06 +0.0 0.10 ? 6% perf-profile.self.cycles-pp.vma_dup_policy
0.08 +0.0 0.12 ? 3% perf-profile.self.cycles-pp.anon_vma_clone
0.06 ? 9% +0.0 0.10 ? 6% perf-profile.self.cycles-pp.may_expand_vm
0.00 +0.1 0.05 perf-profile.self.cycles-pp.mas_prev
0.03 ? 70% +0.1 0.08 ? 5% perf-profile.self.cycles-pp.__init_rwsem
0.09 ? 8% +0.1 0.14 ? 4% perf-profile.self.cycles-pp.kfree
0.00 +0.1 0.06 ? 6% perf-profile.self.cycles-pp.__vm_enough_memory
0.07 ? 6% +0.1 0.13 ? 2% perf-profile.self.cycles-pp.mas_node_count_gfp
0.03 ? 70% +0.1 0.09 ? 7% perf-profile.self.cycles-pp.security_vm_enough_memory_mm
0.15 ? 3% +0.1 0.21 ? 11% perf-profile.self.cycles-pp.setup_object
0.00 +0.1 0.06 perf-profile.self.cycles-pp.memset_orig
0.07 ? 5% +0.1 0.13 ? 3% perf-profile.self.cycles-pp.security_mmap_addr
0.00 +0.1 0.06 ? 6% perf-profile.self.cycles-pp.tlb_batch_pages_flush
0.06 ? 7% +0.1 0.13 ? 3% perf-profile.self.cycles-pp.free_pgd_range
0.08 +0.1 0.15 ? 2% perf-profile.self.cycles-pp.check_brk_limits
0.08 ? 6% +0.1 0.14 ? 3% perf-profile.self.cycles-pp.khugepaged_enter_vma
0.09 ? 4% +0.1 0.17 ? 2% perf-profile.self.cycles-pp.unmap_single_vma
0.00 +0.1 0.08 ? 6% perf-profile.self.cycles-pp.vma_prepare
0.07 ? 5% +0.1 0.15 ? 4% perf-profile.self.cycles-pp.up_read
0.06 ? 7% +0.1 0.14 ? 5% perf-profile.self.cycles-pp.strnlen
0.16 ? 2% +0.1 0.24 perf-profile.self.cycles-pp.tlb_gather_mmu
0.07 +0.1 0.15 ? 3% perf-profile.self.cycles-pp.unlink_anon_vmas
0.09 ? 6% +0.1 0.17 perf-profile.self.cycles-pp.lru_add_drain_cpu
0.00 +0.1 0.08 perf-profile.self.cycles-pp.mlock_drain_local
0.04 ? 44% +0.1 0.12 ? 3% perf-profile.self.cycles-pp.can_vma_merge_after
0.14 ? 2% +0.1 0.22 ? 3% perf-profile.self.cycles-pp.get_unmapped_area
0.01 ?223% +0.1 0.09 ? 5% perf-profile.self.cycles-pp.__pte_offset_map
0.06 ? 7% +0.1 0.15 ? 3% perf-profile.self.cycles-pp.remove_vma
0.08 ? 4% +0.1 0.17 ? 3% perf-profile.self.cycles-pp.syscall_exit_to_user_mode_prepare
0.09 +0.1 0.18 ? 3% perf-profile.self.cycles-pp.refill_obj_stock
0.08 ? 4% +0.1 0.17 ? 3% perf-profile.self.cycles-pp.current_obj_cgroup
0.09 ? 4% +0.1 0.18 ? 2% perf-profile.self.cycles-pp.__pte_offset_map_lock
0.00 +0.1 0.10 ? 4% perf-profile.self.cycles-pp.mas_is_err
0.09 ? 6% +0.1 0.19 ? 3% perf-profile.self.cycles-pp.mas_nomem
0.11 ? 4% +0.1 0.21 ? 4% perf-profile.self.cycles-pp._raw_spin_lock
0.24 ? 2% +0.1 0.35 perf-profile.self.cycles-pp.mas_destroy
0.12 ? 3% +0.1 0.23 ? 2% perf-profile.self.cycles-pp.cap_mmap_addr
1.02 +0.1 1.13 perf-profile.self.cycles-pp.mtree_range_walk
0.15 ? 4% +0.1 0.26 ? 4% perf-profile.self.cycles-pp.rcu_all_qs
0.12 ? 6% +0.1 0.22 ? 2% perf-profile.self.cycles-pp.exit_to_user_mode_prepare
0.09 +0.1 0.20 ? 2% perf-profile.self.cycles-pp.downgrade_write
0.13 +0.1 0.25 ? 2% perf-profile.self.cycles-pp.__x64_sys_brk
0.22 ? 2% +0.1 0.34 ? 2% perf-profile.self.cycles-pp.unmap_vmas
0.13 ? 3% +0.1 0.26 ? 2% perf-profile.self.cycles-pp.vma_adjust_trans_huge
0.12 ? 4% +0.1 0.25 ? 2% perf-profile.self.cycles-pp.entry_SYSCALL_64_safe_stack
0.16 ? 3% +0.1 0.30 perf-profile.self.cycles-pp.tlb_finish_mmu
0.12 ? 4% +0.1 0.26 ? 2% perf-profile.self.cycles-pp.mas_wr_store_setup
0.14 ? 4% +0.2 0.29 ? 2% perf-profile.self.cycles-pp.syscall_enter_from_user_mode
0.14 ? 2% +0.2 0.31 perf-profile.self.cycles-pp.free_pgtables
0.12 ? 4% +0.2 0.28 perf-profile.self.cycles-pp.strscpy
0.00 +0.2 0.17 ? 4% perf-profile.self.cycles-pp.mas_prev_range
0.14 ? 4% +0.2 0.31 ? 2% perf-profile.self.cycles-pp.percpu_counter_add_batch
0.18 ? 2% +0.2 0.35 perf-profile.self.cycles-pp.cap_vm_enough_memory
0.18 ? 3% +0.2 0.36 ? 2% perf-profile.self.cycles-pp.zap_pte_range
0.15 ? 3% +0.2 0.33 ? 2% perf-profile.self.cycles-pp.zap_pmd_range
0.27 +0.2 0.47 perf-profile.self.cycles-pp.unmap_region
0.00 +0.2 0.20 ? 2% perf-profile.self.cycles-pp.mas_wr_append
0.00 +0.2 0.20 ? 3% perf-profile.self.cycles-pp.mas_wr_slot_store
0.18 ? 2% +0.2 0.39 perf-profile.self.cycles-pp.vma_complete
0.34 ? 5% +0.2 0.55 ? 3% perf-profile.self.cycles-pp.vm_area_free_rcu_cb
0.22 ? 2% +0.2 0.44 ? 2% perf-profile.self.cycles-pp.entry_SYSRETQ_unsafe_stack
0.45 ? 2% +0.2 0.68 perf-profile.self.cycles-pp.mas_alloc_nodes
0.20 ? 2% +0.2 0.43 ? 2% perf-profile.self.cycles-pp.down_write_killable
0.20 ? 3% +0.2 0.44 perf-profile.self.cycles-pp.perf_event_mmap
0.18 ? 3% +0.2 0.42 ? 2% perf-profile.self.cycles-pp.do_syscall_64
0.24 +0.3 0.49 perf-profile.self.cycles-pp.arch_get_unmapped_area_topdown
0.27 ? 3% +0.3 0.54 perf-profile.self.cycles-pp.obj_cgroup_charge
0.36 ? 2% +0.3 0.66 ? 3% perf-profile.self.cycles-pp.down_write
0.30 ? 2% +0.3 0.62 perf-profile.self.cycles-pp.vm_area_dup
0.32 ? 2% +0.3 0.64 ? 2% perf-profile.self.cycles-pp.mod_objcg_state
0.35 +0.3 0.68 perf-profile.self.cycles-pp.mas_walk
0.34 ? 2% +0.3 0.68 perf-profile.self.cycles-pp.perf_event_mmap_event
0.33 ? 2% +0.4 0.68 perf-profile.self.cycles-pp.up_write
0.44 ? 2% +0.4 0.80 perf-profile.self.cycles-pp.perf_iterate_sb
0.58 +0.4 0.94 ? 2% perf-profile.self.cycles-pp.__cond_resched
0.30 ? 2% +0.4 0.68 perf-profile.self.cycles-pp.userfaultfd_unmap_complete
0.51 +0.4 0.88 perf-profile.self.cycles-pp.mas_next_slot
0.44 ? 2% +0.4 0.82 perf-profile.self.cycles-pp.unmap_page_range
0.58 +0.4 0.96 perf-profile.self.cycles-pp.mas_find
0.26 +0.4 0.68 perf-profile.self.cycles-pp.mas_wr_end_piv
0.48 ? 2% +0.4 0.90 perf-profile.self.cycles-pp.brk
0.45 +0.4 0.88 perf-profile.self.cycles-pp.mas_prev_slot
0.49 +0.4 0.94 perf-profile.self.cycles-pp.mas_leaf_max_gap
0.34 ? 2% +0.4 0.78 perf-profile.self.cycles-pp.mas_store_prealloc
0.20 ? 3% +0.4 0.65 ? 2% perf-profile.self.cycles-pp.mas_update_gap
0.41 ? 2% +0.5 0.92 perf-profile.self.cycles-pp.mas_store_gfp
0.64 +0.6 1.23 perf-profile.self.cycles-pp.memcg_slab_post_alloc_hook
0.59 ? 2% +0.6 1.22 perf-profile.self.cycles-pp.__split_vma
0.44 ? 2% +0.7 1.10 perf-profile.self.cycles-pp.mas_wr_store_entry
0.66 +0.7 1.35 perf-profile.self.cycles-pp.mas_preallocate
0.59 +0.7 1.33 perf-profile.self.cycles-pp.do_brk_flags
0.58 +0.7 1.32 perf-profile.self.cycles-pp.mas_wr_walk
1.03 +0.8 1.81 perf-profile.self.cycles-pp.do_vmi_align_munmap
0.78 +0.8 1.57 perf-profile.self.cycles-pp.__do_sys_brk
1.79 +0.9 2.66 perf-profile.self.cycles-pp.__call_rcu_common
1.02 +1.0 1.98 perf-profile.self.cycles-pp.perf_event_mmap_output
1.33 +1.4 2.74 perf-profile.self.cycles-pp.kmem_cache_alloc
1.64 +1.7 3.30 perf-profile.self.cycles-pp.__entry_text_start
2.26 +2.2 4.50 perf-profile.self.cycles-pp.entry_SYSCALL_64_after_hwframe
3.23 +3.3 6.58 perf-profile.self.cycles-pp.syscall_exit_to_user_mode
0.21 ? 2% +3.6 3.82 perf-profile.self.cycles-pp.mas_wr_node_store
3.93 +3.9 7.78 perf-profile.self.cycles-pp.syscall_return_via_sysret
Disclaimer:
Results have been estimated based on internal Intel analysis and are provided
for informational purposes only. Any difference in system hardware or software
design or configuration may affect actual performance.
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
* kernel test robot <[email protected]> [231128 08:56]:
>
>
> Hello,
>
> kernel test robot noticed a 94.7% improvement of will-it-scale.per_process_ops on:
Okay, this *seems* awesome. I expected to see results in
micro-benchmarks from Peng's patches - but not in this area.
>
>
> commit: 6e553c6bcb7746abad29ce63e0cb7a18348e88fb ("fork: use __mt_dup() to duplicate maple tree in dup_mmap()")
> https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master
>
> testcase: will-it-scale
> test machine: 104 threads 2 sockets (Skylake) with 192G memory
> parameters:
>
> nr_task: 100%
> mode: process
> test: brk2
> cpufreq_governor: performance
>
>
>
>
>
>
> Details are as below:
> -------------------------------------------------------------------------------------------------->
>
>
> The kernel config and materials to reproduce are available at:
> https://download.01.org/0day-ci/archive/20231128/[email protected]
>
> =========================================================================================
> compiler/cpufreq_governor/kconfig/mode/nr_task/rootfs/tbox_group/test/testcase:
> gcc-12/performance/x86_64-rhel-8.3/process/100%/debian-11.1-x86_64-20220510.cgz/lkp-skl-fpga01/brk2/will-it-scale
This test was written by willy to improve on the less-than-ideal bkr1;
forking has nothing to do with this test. It is expanding and
contracting a VMA (as apposed to adding and removing a new VMA in brk1).
[1]
The forking changes should have zero effects on this test. Does anyone
have an insight as to why we would see any change (let alone 94.7%)?
I would think that maybe the start-up time would change, but that should
be a very small amount of the tests overall time.
>
> commit:
> ec81deb6b7 ("maple_tree: preserve the tree attributes when destroying maple tree")
The tree isn't destroyed in this test.
> 6e553c6bcb ("fork: use __mt_dup() to duplicate maple tree in dup_mmap()")
The process isn't forking in the loop.
...
1. https://github.com/antonblanchard/will-it-scale/blame/master/tests/brk2.c
Thanks,
Liam
在 2023/11/28 21:55, kernel test robot 写道:
>
>
> Hello,
>
> kernel test robot noticed a 94.7% improvement of will-it-scale.per_process_ops on:
>
>
> commit: 6e553c6bcb7746abad29ce63e0cb7a18348e88fb ("fork: use __mt_dup() to duplicate maple tree in dup_mmap()")
> https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master
>
> testcase: will-it-scale
> test machine: 104 threads 2 sockets (Skylake) with 192G memory
> parameters:
>
> nr_task: 100%
> mode: process
> test: brk2
> cpufreq_governor: performance
>
>
>
>
>
>
> Details are as below:
> -------------------------------------------------------------------------------------------------->
>
>
> The kernel config and materials to reproduce are available at:
> https://download.01.org/0day-ci/archive/20231128/[email protected]
>
> =========================================================================================
> compiler/cpufreq_governor/kconfig/mode/nr_task/rootfs/tbox_group/test/testcase:
> gcc-12/performance/x86_64-rhel-8.3/process/100%/debian-11.1-x86_64-20220510.cgz/lkp-skl-fpga01/brk2/will-it-scale
>
> commit:
> ec81deb6b7 ("maple_tree: preserve the tree attributes when destroying maple tree")
> 6e553c6bcb ("fork: use __mt_dup() to duplicate maple tree in dup_mmap()")
>
> ec81deb6b769dc1b 6e553c6bcb7746abad29ce63e0c
> ---------------- ---------------------------
> %stddev %change %stddev
> \ | \
> 24.47 -7.2 17.29 mpstat.cpu.all.soft%
> 8.76 +7.6 16.36 mpstat.cpu.all.usr%
> 8.80 +85.5% 16.33 vmstat.cpu.us
> 7732 -18.3% 6318 vmstat.system.cs
> 13467005 +94.7% 26223847 will-it-scale.104.processes
> 129489 +94.7% 252151 will-it-scale.per_process_ops
> 13467005 +94.7% 26223847 will-it-scale.workload
> 1.792e+08 -13.6% 1.549e+08 numa-numastat.node0.local_node
> 1.793e+08 -13.6% 1.549e+08 numa-numastat.node0.numa_hit
> 1.867e+08 -12.6% 1.631e+08 numa-numastat.node1.local_node
> 1.867e+08 -12.6% 1.632e+08 numa-numastat.node1.numa_hit
> 1.793e+08 -13.6% 1.549e+08 numa-vmstat.node0.numa_hit
> 1.792e+08 -13.6% 1.549e+08 numa-vmstat.node0.numa_local
> 1.867e+08 -12.6% 1.631e+08 numa-vmstat.node1.numa_hit
> 1.867e+08 -12.6% 1.631e+08 numa-vmstat.node1.numa_local
> 122.70 +43.4 166.10 turbostat.PKG_%
> 56.67 ± 2% -6.8% 52.83 ± 3% turbostat.PkgTmp
> 376.36 +1.3% 381.14 turbostat.PkgWatt
> 45.03 -5.8% 42.40 turbostat.RAMWatt
> 121103 -2.7% 117803 proc-vmstat.nr_slab_unreclaimable
> 68338 ± 7% +24.8% 85281 ± 6% proc-vmstat.numa_hint_faults
> 3.66e+08 -13.1% 3.181e+08 proc-vmstat.numa_hit
> 3.659e+08 -13.1% 3.18e+08 proc-vmstat.numa_local
> 7.155e+08 -15.6% 6.038e+08 proc-vmstat.pgalloc_normal
> 1025781 +2.6% 1052377 proc-vmstat.pgfault
> 7.131e+08 -15.5% 6.028e+08 proc-vmstat.pgfree
> 12305161 +10.3% 13578139 sched_debug.cfs_rq:/.avg_vruntime.avg
> 12419603 +10.6% 13739004 sched_debug.cfs_rq:/.avg_vruntime.max
> 122981 ± 5% +41.3% 173809 ± 12% sched_debug.cfs_rq:/.avg_vruntime.stddev
> 376.33 ± 43% -53.5% 174.89 ± 34% sched_debug.cfs_rq:/.load_avg.avg
> 85.75 ± 9% -59.1% 35.08 ± 16% sched_debug.cfs_rq:/.load_avg.min
> 12305176 +10.3% 13578151 sched_debug.cfs_rq:/.min_vruntime.avg
> 12419621 +10.6% 13739007 sched_debug.cfs_rq:/.min_vruntime.max
> 122979 ± 5% +41.3% 173810 ± 12% sched_debug.cfs_rq:/.min_vruntime.stddev
> 13056 -15.6% 11025 sched_debug.cpu.nr_switches.avg
> 9228 -22.3% 7174 sched_debug.cpu.nr_switches.min
> 0.28 ± 7% -63.7% 0.10 ± 10% perf-sched.sch_delay.avg.ms.schedule_timeout.rcu_gp_fqs_loop.rcu_gp_kthread.kthread
> 0.08 ± 5% -27.0% 0.06 ± 8% perf-sched.sch_delay.avg.ms.smpboot_thread_fn.kthread.ret_from_fork.ret_from_fork_asm
> 3.56 ± 45% -79.6% 0.73 ±199% perf-sched.sch_delay.max.ms.__cond_resched.smpboot_thread_fn.kthread.ret_from_fork.ret_from_fork_asm
> 10.02 ± 62% -70.0% 3.01 ± 2% perf-sched.sch_delay.max.ms.schedule_timeout.rcu_gp_fqs_loop.rcu_gp_kthread.kthread
> 11.16 ± 29% -48.2% 5.78 ± 45% perf-sched.sch_delay.max.ms.wait_for_partner.fifo_open.do_dentry_open.do_open
> 41.80 +25.8% 52.58 perf-sched.total_wait_and_delay.average.ms
> 37576 ± 2% -21.0% 29680 perf-sched.total_wait_and_delay.count.ms
> 41.73 +25.8% 52.50 perf-sched.total_wait_time.average.ms
> 4.50 ± 2% -16.1% 3.78 ± 6% perf-sched.wait_and_delay.avg.ms.__cond_resched.down_write.__split_vma.do_vmi_align_munmap.__do_sys_brk
> 4.61 ± 6% -18.0% 3.78 ± 2% perf-sched.wait_and_delay.avg.ms.__cond_resched.down_write.do_brk_flags.__do_sys_brk.do_syscall_64
> 4.26 ± 7% -11.7% 3.77 perf-sched.wait_and_delay.avg.ms.__cond_resched.kmem_cache_alloc.mas_alloc_nodes.mas_preallocate.__split_vma
> 32.16 +53.0% 49.20 perf-sched.wait_and_delay.avg.ms.__cond_resched.smpboot_thread_fn.kthread.ret_from_fork.ret_from_fork_asm
> 63.20 +35.4% 85.56 ± 2% perf-sched.wait_and_delay.avg.ms.smpboot_thread_fn.kthread.ret_from_fork.ret_from_fork_asm
> 735.00 ± 2% -68.0% 234.83 ± 4% perf-sched.wait_and_delay.count.__cond_resched.down_write.__split_vma.do_vmi_align_munmap.__do_sys_brk
> 3090 ± 6% -93.8% 190.50 ± 4% perf-sched.wait_and_delay.count.__cond_resched.down_write.do_brk_flags.__do_sys_brk.do_syscall_64
> 975.67 ± 3% +61.5% 1576 perf-sched.wait_and_delay.count.__cond_resched.down_write_killable.__do_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe
> 298.17 ± 4% +54.6% 461.00 ± 4% perf-sched.wait_and_delay.count.__cond_resched.kmem_cache_alloc.mas_alloc_nodes.mas_preallocate.__split_vma
> 524.33 ± 4% +56.2% 819.17 ± 2% perf-sched.wait_and_delay.count.__cond_resched.kmem_cache_alloc.mas_alloc_nodes.mas_preallocate.do_brk_flags
> 402.83 ± 2% +54.2% 621.17 ± 3% perf-sched.wait_and_delay.count.__cond_resched.kmem_cache_alloc.vm_area_dup.__split_vma.do_vmi_align_munmap
> 265.50 ± 4% +28.7% 341.67 ± 2% perf-sched.wait_and_delay.count.__cond_resched.remove_vma.do_vmi_align_munmap.__do_sys_brk.do_syscall_64
> 661.33 ± 7% -27.6% 478.83 ± 10% perf-sched.wait_and_delay.count.__cond_resched.smpboot_thread_fn.kthread.ret_from_fork.ret_from_fork_asm
> 66.33 ±141% +310.3% 272.17 ± 7% perf-sched.wait_and_delay.count.__cond_resched.zap_pmd_range.isra.0.unmap_page_range
> 1517 ± 4% +72.0% 2609 perf-sched.wait_and_delay.count.exit_to_user_mode_loop.exit_to_user_mode_prepare.irqentry_exit_to_user_mode.asm_sysvec_apic_timer_interrupt
> 6322 ± 3% -41.1% 3725 ± 4% perf-sched.wait_and_delay.count.exit_to_user_mode_loop.exit_to_user_mode_prepare.syscall_exit_to_user_mode.do_syscall_64
> 14299 ± 2% -25.3% 10677 perf-sched.wait_and_delay.count.smpboot_thread_fn.kthread.ret_from_fork.ret_from_fork_asm
> 19.65 ± 25% -38.8% 12.03 ± 7% perf-sched.wait_and_delay.max.ms.__cond_resched.down_write.__split_vma.do_vmi_align_munmap.__do_sys_brk
> 20.07 ± 27% -42.3% 11.57 ± 8% perf-sched.wait_and_delay.max.ms.__cond_resched.down_write.do_brk_flags.__do_sys_brk.do_syscall_64
> 18.62 ± 28% -32.5% 12.56 ± 12% perf-sched.wait_and_delay.max.ms.__cond_resched.kmem_cache_alloc.vm_area_dup.__split_vma.do_vmi_align_munmap
> 71.03 ± 10% +44.2% 102.39 ± 36% perf-sched.wait_and_delay.max.ms.__cond_resched.smpboot_thread_fn.kthread.ret_from_fork.ret_from_fork_asm
> 23.72 ± 26% -33.5% 15.79 ± 12% perf-sched.wait_and_delay.max.ms.__cond_resched.unmap_vmas.unmap_region.constprop.0
> 14.70 ± 21% -33.3% 9.80 ± 2% perf-sched.wait_and_delay.max.ms.schedule_timeout.rcu_gp_fqs_loop.rcu_gp_kthread.kthread
> 4.50 ± 2% -16.1% 3.78 ± 6% perf-sched.wait_time.avg.ms.__cond_resched.down_write.__split_vma.do_vmi_align_munmap.__do_sys_brk
> 4.61 ± 6% -18.0% 3.78 ± 2% perf-sched.wait_time.avg.ms.__cond_resched.down_write.do_brk_flags.__do_sys_brk.do_syscall_64
> 4.26 ± 7% -11.7% 3.77 perf-sched.wait_time.avg.ms.__cond_resched.kmem_cache_alloc.mas_alloc_nodes.mas_preallocate.__split_vma
> 4.26 ± 9% -100.0% 0.00 perf-sched.wait_time.avg.ms.__cond_resched.kmem_cache_alloc_bulk.mas_alloc_nodes.mas_preallocate.__split_vma
> 4.61 ± 3% -100.0% 0.00 perf-sched.wait_time.avg.ms.__cond_resched.kmem_cache_alloc_bulk.mas_alloc_nodes.mas_preallocate.do_brk_flags
> 32.13 +53.1% 49.19 perf-sched.wait_time.avg.ms.__cond_resched.smpboot_thread_fn.kthread.ret_from_fork.ret_from_fork_asm
> 63.12 +35.5% 85.50 ± 2% perf-sched.wait_time.avg.ms.smpboot_thread_fn.kthread.ret_from_fork.ret_from_fork_asm
> 19.65 ± 25% -38.8% 12.03 ± 7% perf-sched.wait_time.max.ms.__cond_resched.down_write.__split_vma.do_vmi_align_munmap.__do_sys_brk
> 20.07 ± 27% -42.3% 11.57 ± 8% perf-sched.wait_time.max.ms.__cond_resched.down_write.do_brk_flags.__do_sys_brk.do_syscall_64
> 18.62 ± 28% -32.5% 12.56 ± 12% perf-sched.wait_time.max.ms.__cond_resched.kmem_cache_alloc.vm_area_dup.__split_vma.do_vmi_align_munmap
> 16.69 ± 36% -100.0% 0.00 perf-sched.wait_time.max.ms.__cond_resched.kmem_cache_alloc_bulk.mas_alloc_nodes.mas_preallocate.__split_vma
> 16.03 ± 17% -100.0% 0.00 perf-sched.wait_time.max.ms.__cond_resched.kmem_cache_alloc_bulk.mas_alloc_nodes.mas_preallocate.do_brk_flags
> 70.43 ± 10% +45.4% 102.38 ± 36% perf-sched.wait_time.max.ms.__cond_resched.smpboot_thread_fn.kthread.ret_from_fork.ret_from_fork_asm
> 23.72 ± 26% -33.5% 15.79 ± 12% perf-sched.wait_time.max.ms.__cond_resched.unmap_vmas.unmap_region.constprop.0
> 17.57 ± 34% -29.3% 12.43 ± 7% perf-sched.wait_time.max.ms.__cond_resched.zap_pmd_range.isra.0.unmap_page_range
> 8.69 ± 9% -20.8% 6.88 perf-sched.wait_time.max.ms.schedule_timeout.rcu_gp_fqs_loop.rcu_gp_kthread.kthread
> 2.62 -12.2% 2.30 perf-stat.i.MPKI
> 2.471e+10 +5.8% 2.614e+10 perf-stat.i.branch-instructions
> 0.82 +0.1 0.90 ± 3% perf-stat.i.branch-miss-rate%
> 2.032e+08 +14.1% 2.319e+08 perf-stat.i.branch-misses
> 61.39 +1.3 62.74 perf-stat.i.cache-miss-rate%
> 3.567e+08 -14.2% 3.061e+08 perf-stat.i.cache-misses
> 5.81e+08 -16.2% 4.871e+08 perf-stat.i.cache-references
> 7695 -18.5% 6271 perf-stat.i.context-switches
> 2.04 +2.6% 2.09 perf-stat.i.cpi
> 249.60 -26.8% 182.76 perf-stat.i.cpu-migrations
> 780.53 +16.7% 911.09 perf-stat.i.cycles-between-cache-misses
> 0.05 +0.0 0.08 ± 4% perf-stat.i.dTLB-load-miss-rate%
> 15775916 +75.7% 27724344 perf-stat.i.dTLB-load-misses
> 3.43e+10 +5.8% 3.63e+10 perf-stat.i.dTLB-loads
> 459336 ± 4% -18.1% 376380 ± 10% perf-stat.i.dTLB-store-misses
> 2.189e+10 -2.7% 2.13e+10 perf-stat.i.dTLB-stores
> 31159069 +37.1% 42716400 perf-stat.i.iTLB-load-misses
> 456253 ± 4% +83.6% 837671 ± 31% perf-stat.i.iTLB-loads
> 1.364e+11 -1.9% 1.337e+11 perf-stat.i.instructions
> 4379 -28.5% 3131 perf-stat.i.instructions-per-iTLB-miss
> 0.49 -2.1% 0.48 perf-stat.i.ipc
> 1327 -23.4% 1017 perf-stat.i.metric.K/sec
> 783.30 +3.4% 809.81 perf-stat.i.metric.M/sec
> 2733 +2.7% 2807 perf-stat.i.minor-faults
> 4668970 -23.7% 3562283 ± 12% perf-stat.i.node-load-misses
> 44341556 -21.0% 35024109 ± 2% perf-stat.i.node-loads
> 2.44 -0.5 1.91 ± 9% perf-stat.i.node-store-miss-rate%
> 2146790 -44.9% 1183052 ± 2% perf-stat.i.node-store-misses
> 85964398 -24.9% 64569512 ± 2% perf-stat.i.node-stores
> 2733 +2.7% 2807 perf-stat.i.page-faults
> 2.62 -12.5% 2.29 perf-stat.overall.MPKI
> 0.82 +0.1 0.89 perf-stat.overall.branch-miss-rate%
> 61.39 +1.4 62.83 perf-stat.overall.cache-miss-rate%
> 2.04 +2.1% 2.08 perf-stat.overall.cpi
> 780.25 +16.6% 910.13 perf-stat.overall.cycles-between-cache-misses
> 0.05 +0.0 0.08 perf-stat.overall.dTLB-load-miss-rate%
> 0.00 ± 4% -0.0 0.00 ± 10% perf-stat.overall.dTLB-store-miss-rate%
> 4376 -28.5% 3130 perf-stat.overall.instructions-per-iTLB-miss
> 0.49 -2.0% 0.48 perf-stat.overall.ipc
> 2.44 -0.6 1.80 ± 2% perf-stat.overall.node-store-miss-rate%
> 3051945 -49.6% 1539638 perf-stat.overall.path-length
> 2.462e+10 +5.8% 2.605e+10 perf-stat.ps.branch-instructions
> 2.025e+08 +14.1% 2.311e+08 perf-stat.ps.branch-misses
> 3.555e+08 -14.2% 3.051e+08 perf-stat.ps.cache-misses
> 5.791e+08 -16.2% 4.855e+08 perf-stat.ps.cache-references
> 7668 -18.5% 6250 perf-stat.ps.context-switches
> 248.68 -26.7% 182.19 perf-stat.ps.cpu-migrations
> 15739140 +75.6% 27640979 perf-stat.ps.dTLB-load-misses
> 3.418e+10 +5.8% 3.618e+10 perf-stat.ps.dTLB-loads
> 458389 ± 4% -18.1% 375627 ± 10% perf-stat.ps.dTLB-store-misses
> 2.181e+10 -2.7% 2.123e+10 perf-stat.ps.dTLB-stores
> 31053977 +37.1% 42572874 perf-stat.ps.iTLB-load-misses
> 454414 ± 4% +83.8% 835372 ± 31% perf-stat.ps.iTLB-loads
> 1.359e+11 -1.9% 1.333e+11 perf-stat.ps.instructions
> 2730 +2.6% 2802 perf-stat.ps.minor-faults
> 4653258 -23.7% 3549888 ± 12% perf-stat.ps.node-load-misses
> 44203348 -21.0% 34917073 ± 2% perf-stat.ps.node-loads
> 2139791 -44.9% 1179122 ± 2% perf-stat.ps.node-store-misses
> 85677729 -24.9% 64357015 ± 2% perf-stat.ps.node-stores
> 2731 +2.6% 2803 perf-stat.ps.page-faults
> 4.11e+13 -1.8% 4.038e+13 perf-stat.total.instructions
> 33.52 -19.0 14.50 perf-profile.calltrace.cycles-pp.do_brk_flags.__do_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe.brk
> 17.05 -14.1 2.93 perf-profile.calltrace.cycles-pp.mas_store_prealloc.do_brk_flags.__do_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe
Hi, Liam
From the performance data shown above, we can see that there is a
significant variation in the overhead of mas_store_prealloc() within
the do_brk_flags() function. I speculate that the maple tree duplicated
through __mt_dup() has a different structure compared to the maple tree
duplicated through bulk store. In this test case, the maple tree duplicated
through __mt_dup() triggers a fast path for maple tree store operations,
thus avoiding memory allocation. It also avoids the slow path for maple
tree store operations.
Thanks,
Peng
> 11.58 -11.6 0.00 perf-profile.calltrace.cycles-pp.___slab_alloc.__kmem_cache_alloc_bulk.kmem_cache_alloc_bulk.mas_alloc_nodes.mas_preallocate
> 10.92 -10.9 0.00 perf-profile.calltrace.cycles-pp.kmem_cache_alloc_bulk.mas_alloc_nodes.mas_preallocate.do_brk_flags.__do_sys_brk
> 10.60 -10.6 0.00 perf-profile.calltrace.cycles-pp.__kmem_cache_alloc_bulk.kmem_cache_alloc_bulk.mas_alloc_nodes.mas_preallocate.do_brk_flags
> 10.54 -10.5 0.00 perf-profile.calltrace.cycles-pp.mas_wr_bnode.mas_store_prealloc.vma_complete.__split_vma.do_vmi_align_munmap
> 10.26 -10.3 0.00 perf-profile.calltrace.cycles-pp.mas_wr_spanning_store.mas_store_prealloc.do_brk_flags.__do_sys_brk.do_syscall_64
> 11.70 -9.9 1.78 perf-profile.calltrace.cycles-pp.mas_alloc_nodes.mas_preallocate.do_brk_flags.__do_sys_brk.do_syscall_64
> 12.19 -9.2 2.97 perf-profile.calltrace.cycles-pp.mas_preallocate.do_brk_flags.__do_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe
> 69.63 -9.1 60.49 perf-profile.calltrace.cycles-pp.__do_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe.brk
> 8.93 -8.9 0.00 perf-profile.calltrace.cycles-pp.mas_split.mas_wr_bnode.mas_store_prealloc.vma_complete.__split_vma
> 7.42 -7.4 0.00 perf-profile.calltrace.cycles-pp.get_partial_node.___slab_alloc.__kmem_cache_alloc_bulk.kmem_cache_alloc_bulk.mas_alloc_nodes
> 7.32 -7.3 0.00 perf-profile.calltrace.cycles-pp.mas_spanning_rebalance.mas_wr_spanning_store.mas_store_prealloc.do_brk_flags.__do_sys_brk
> 12.16 -6.0 6.13 perf-profile.calltrace.cycles-pp.mas_store_prealloc.vma_complete.__split_vma.do_vmi_align_munmap.__do_sys_brk
> 12.28 -5.9 6.43 perf-profile.calltrace.cycles-pp.vma_complete.__split_vma.do_vmi_align_munmap.__do_sys_brk.do_syscall_64
> 6.38 -5.6 0.73 ± 2% perf-profile.calltrace.cycles-pp.mas_destroy.mas_store_prealloc.do_brk_flags.__do_sys_brk.do_syscall_64
> 15.46 -5.0 10.49 ± 4% perf-profile.calltrace.cycles-pp.smpboot_thread_fn.kthread.ret_from_fork.ret_from_fork_asm
> 15.44 -5.0 10.48 ± 4% perf-profile.calltrace.cycles-pp.__do_softirq.run_ksoftirqd.smpboot_thread_fn.kthread.ret_from_fork
> 15.44 -5.0 10.48 ± 4% perf-profile.calltrace.cycles-pp.run_ksoftirqd.smpboot_thread_fn.kthread.ret_from_fork.ret_from_fork_asm
> 15.47 -5.0 10.50 ± 4% perf-profile.calltrace.cycles-pp.ret_from_fork_asm
> 15.47 -5.0 10.50 ± 4% perf-profile.calltrace.cycles-pp.ret_from_fork.ret_from_fork_asm
> 15.47 -5.0 10.50 ± 4% perf-profile.calltrace.cycles-pp.kthread.ret_from_fork.ret_from_fork_asm
> 15.44 -5.0 10.48 ± 4% perf-profile.calltrace.cycles-pp.rcu_core.__do_softirq.run_ksoftirqd.smpboot_thread_fn.kthread
> 15.42 -5.0 10.46 ± 4% perf-profile.calltrace.cycles-pp.rcu_do_batch.rcu_core.__do_softirq.run_ksoftirqd.smpboot_thread_fn
> 74.20 -4.5 69.66 perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.brk
> 20.44 -3.4 17.09 perf-profile.calltrace.cycles-pp.__split_vma.do_vmi_align_munmap.__do_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe
> 3.84 -2.5 1.34 ± 4% perf-profile.calltrace.cycles-pp.__slab_free.rcu_do_batch.rcu_core.__do_softirq.run_ksoftirqd
> 76.40 -2.4 74.03 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe.brk
> 4.90 ± 2% -2.0 2.86 ± 4% perf-profile.calltrace.cycles-pp.rcu_core.__do_softirq.irq_exit_rcu.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt
> 4.89 ± 2% -2.0 2.84 ± 4% perf-profile.calltrace.cycles-pp.rcu_do_batch.rcu_core.__do_softirq.irq_exit_rcu.sysvec_apic_timer_interrupt
> 2.88 -1.9 1.03 perf-profile.calltrace.cycles-pp.mas_alloc_nodes.mas_preallocate.__split_vma.do_vmi_align_munmap.__do_sys_brk
> 3.53 -1.3 2.22 perf-profile.calltrace.cycles-pp.mas_preallocate.__split_vma.do_vmi_align_munmap.__do_sys_brk.do_syscall_64
> 0.95 ± 3% -0.2 0.71 ± 4% perf-profile.calltrace.cycles-pp.rcu_cblist_dequeue.rcu_do_batch.rcu_core.__do_softirq.run_ksoftirqd
> 0.71 -0.1 0.62 ± 2% perf-profile.calltrace.cycles-pp.kmem_cache_free.rcu_do_batch.rcu_core.__do_softirq.run_ksoftirqd
> 0.74 ± 3% +0.2 0.94 ± 4% perf-profile.calltrace.cycles-pp.__unfreeze_partials.rcu_do_batch.rcu_core.__do_softirq.irq_exit_rcu
> 0.67 +0.3 0.97 ± 3% perf-profile.calltrace.cycles-pp.vm_area_free_rcu_cb.rcu_do_batch.rcu_core.__do_softirq.run_ksoftirqd
> 0.56 ± 2% +0.4 0.97 ± 5% perf-profile.calltrace.cycles-pp.irq_exit_rcu.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt.syscall_enter_from_user_mode.do_syscall_64
> 0.56 ± 2% +0.4 0.97 ± 5% perf-profile.calltrace.cycles-pp.__do_softirq.irq_exit_rcu.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt.syscall_enter_from_user_mode
> 0.58 ± 2% +0.4 1.01 ± 5% perf-profile.calltrace.cycles-pp.asm_sysvec_apic_timer_interrupt.syscall_enter_from_user_mode.do_syscall_64.entry_SYSCALL_64_after_hwframe.brk
> 0.58 ± 2% +0.4 1.01 ± 5% perf-profile.calltrace.cycles-pp.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt.syscall_enter_from_user_mode.do_syscall_64.entry_SYSCALL_64_after_hwframe
> 0.00 +0.5 0.51 perf-profile.calltrace.cycles-pp.mas_pop_node.mas_wr_node_store.mas_wr_store_entry.mas_store_gfp.do_vmi_align_munmap
> 0.00 +0.5 0.52 ± 2% perf-profile.calltrace.cycles-pp.__pte_offset_map_lock.zap_pte_range.zap_pmd_range.unmap_page_range.unmap_vmas
> 0.00 +0.5 0.53 ± 2% perf-profile.calltrace.cycles-pp.mas_pop_node.mas_wr_node_store.mas_wr_store_entry.mas_store_prealloc.vma_complete
> 0.00 +0.5 0.54 perf-profile.calltrace.cycles-pp.mas_update_gap.mas_wr_node_store.mas_wr_store_entry.mas_store_prealloc.vma_complete
> 0.43 ± 44% +0.5 0.97 perf-profile.calltrace.cycles-pp.zap_pte_range.zap_pmd_range.unmap_page_range.unmap_vmas.unmap_region
> 0.00 +0.5 0.55 perf-profile.calltrace.cycles-pp.arch_get_unmapped_area_topdown.get_unmapped_area.check_brk_limits.__do_sys_brk.do_syscall_64
> 0.63 ± 2% +0.6 1.18 perf-profile.calltrace.cycles-pp.get_unmapped_area.check_brk_limits.__do_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe
> 0.00 +0.6 0.56 ± 3% perf-profile.calltrace.cycles-pp.kmem_cache_free.mas_destroy.mas_store_prealloc.do_brk_flags.__do_sys_brk
> 6.03 ± 2% +0.6 6.62 ± 4% perf-profile.calltrace.cycles-pp.__unfreeze_partials.rcu_do_batch.rcu_core.__do_softirq.run_ksoftirqd
> 0.71 ± 2% +0.6 1.31 ± 4% perf-profile.calltrace.cycles-pp.syscall_enter_from_user_mode.do_syscall_64.entry_SYSCALL_64_after_hwframe.brk
> 0.00 +0.6 0.63 ± 2% perf-profile.calltrace.cycles-pp.mas_update_gap.mas_wr_slot_store.mas_wr_store_entry.mas_store_prealloc.do_brk_flags
> 0.73 ± 2% +0.6 1.36 perf-profile.calltrace.cycles-pp.check_brk_limits.__do_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe.brk
> 0.00 +0.7 0.68 perf-profile.calltrace.cycles-pp.obj_cgroup_charge.kmem_cache_alloc.vm_area_dup.__split_vma.do_vmi_align_munmap
> 0.00 +0.7 0.69 perf-profile.calltrace.cycles-pp.___slab_alloc.kmem_cache_alloc.mas_alloc_nodes.mas_preallocate.do_brk_flags
> 0.74 ± 2% +0.7 1.46 perf-profile.calltrace.cycles-pp.zap_pmd_range.unmap_page_range.unmap_vmas.unmap_region.do_vmi_align_munmap
> 0.00 +0.7 0.72 perf-profile.calltrace.cycles-pp.___slab_alloc.kmem_cache_alloc.mas_alloc_nodes.mas_wr_node_store.mas_wr_store_entry
> 0.00 +0.7 0.72 perf-profile.calltrace.cycles-pp.kmem_cache_alloc.mas_alloc_nodes.mas_preallocate.__split_vma.do_vmi_align_munmap
> 0.00 +0.7 0.74 perf-profile.calltrace.cycles-pp.allocate_slab.___slab_alloc.kmem_cache_alloc.vm_area_dup.__split_vma
> 0.72 +0.7 1.46 perf-profile.calltrace.cycles-pp.memcg_slab_post_alloc_hook.kmem_cache_alloc.vm_area_dup.__split_vma.do_vmi_align_munmap
> 0.00 +0.8 0.76 perf-profile.calltrace.cycles-pp.userfaultfd_unmap_complete.__do_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe.brk
> 0.00 +0.8 0.78 perf-profile.calltrace.cycles-pp.down_write_killable.__do_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe.brk
> 0.00 +0.8 0.80 ± 2% perf-profile.calltrace.cycles-pp.free_pgtables.unmap_region.do_vmi_align_munmap.__do_sys_brk.do_syscall_64
> 1.00 ± 5% +0.9 1.89 ± 4% perf-profile.calltrace.cycles-pp.__do_softirq.irq_exit_rcu.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt.brk
> 1.00 ± 5% +0.9 1.89 ± 4% perf-profile.calltrace.cycles-pp.irq_exit_rcu.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt.brk
> 0.00 +0.9 0.89 perf-profile.calltrace.cycles-pp.mas_wr_slot_store.mas_wr_store_entry.mas_store_prealloc.do_brk_flags.__do_sys_brk
> 1.03 ± 5% +0.9 1.94 ± 4% perf-profile.calltrace.cycles-pp.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt.brk
> 0.56 +0.9 1.48 perf-profile.calltrace.cycles-pp.kmem_cache_alloc.mas_alloc_nodes.mas_preallocate.do_brk_flags.__do_sys_brk
> 1.04 ± 4% +0.9 1.96 ± 4% perf-profile.calltrace.cycles-pp.asm_sysvec_apic_timer_interrupt.brk
> 0.00 +1.0 0.98 perf-profile.calltrace.cycles-pp.___slab_alloc.kmem_cache_alloc.vm_area_dup.__split_vma.do_vmi_align_munmap
> 0.25 ±100% +1.0 1.24 ± 2% perf-profile.calltrace.cycles-pp.mtree_range_walk.mas_walk.mas_find.__do_sys_brk.do_syscall_64
> 0.75 +1.0 1.74 perf-profile.calltrace.cycles-pp.mas_walk.mas_find.__do_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe
> 0.55 +1.0 1.57 ± 2% perf-profile.calltrace.cycles-pp.__call_rcu_common.do_vmi_align_munmap.__do_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe
> 1.13 ± 2% +1.1 2.18 perf-profile.calltrace.cycles-pp.perf_event_mmap_output.perf_iterate_sb.perf_event_mmap_event.perf_event_mmap.do_brk_flags
> 0.95 +1.1 2.03 perf-profile.calltrace.cycles-pp.mas_find.__do_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe.brk
> 1.30 ± 2% +1.2 2.49 perf-profile.calltrace.cycles-pp.unmap_page_range.unmap_vmas.unmap_region.do_vmi_align_munmap.__do_sys_brk
> 0.00 +1.3 1.28 perf-profile.calltrace.cycles-pp.kmem_cache_alloc.mas_alloc_nodes.mas_wr_node_store.mas_wr_store_entry.mas_store_gfp
> 1.50 +1.4 2.90 perf-profile.calltrace.cycles-pp.__entry_text_start.brk
> 1.62 +1.5 3.08 perf-profile.calltrace.cycles-pp.perf_iterate_sb.perf_event_mmap_event.perf_event_mmap.do_brk_flags.__do_sys_brk
> 1.78 +1.5 3.28 perf-profile.calltrace.cycles-pp.unmap_vmas.unmap_region.do_vmi_align_munmap.__do_sys_brk.do_syscall_64
> 0.00 +1.5 1.52 ± 2% perf-profile.calltrace.cycles-pp.__call_rcu_common.mas_wr_node_store.mas_wr_store_entry.mas_store_gfp.do_vmi_align_munmap
> 0.00 +1.5 1.52 perf-profile.calltrace.cycles-pp.mas_alloc_nodes.mas_wr_node_store.mas_wr_store_entry.mas_store_gfp.do_vmi_align_munmap
> 0.00 +1.5 1.53 perf-profile.calltrace.cycles-pp.__call_rcu_common.mas_wr_node_store.mas_wr_store_entry.mas_store_prealloc.vma_complete
> 0.00 +1.7 1.74 perf-profile.calltrace.cycles-pp.mas_wr_store_entry.mas_store_prealloc.do_brk_flags.__do_sys_brk.do_syscall_64
> 0.00 +1.9 1.90 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_safe_stack.brk
> 2.35 +2.2 4.51 perf-profile.calltrace.cycles-pp.perf_event_mmap_event.perf_event_mmap.do_brk_flags.__do_sys_brk.do_syscall_64
> 2.30 +2.4 4.65 perf-profile.calltrace.cycles-pp.kmem_cache_alloc.vm_area_dup.__split_vma.do_vmi_align_munmap.__do_sys_brk
> 2.62 +2.5 5.10 perf-profile.calltrace.cycles-pp.perf_event_mmap.do_brk_flags.__do_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe
> 3.12 +2.6 5.70 perf-profile.calltrace.cycles-pp.unmap_region.do_vmi_align_munmap.__do_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe
> 2.74 +2.8 5.53 perf-profile.calltrace.cycles-pp.vm_area_dup.__split_vma.do_vmi_align_munmap.__do_sys_brk.do_syscall_64
> 4.28 ± 3% +2.9 7.16 ± 4% perf-profile.calltrace.cycles-pp._raw_spin_lock_irqsave.free_pcppages_bulk.free_unref_page_commit.free_unref_page.__unfreeze_partials
> 4.38 ± 3% +2.9 7.31 ± 4% perf-profile.calltrace.cycles-pp.free_pcppages_bulk.free_unref_page_commit.free_unref_page.__unfreeze_partials.rcu_do_batch
> 4.41 ± 3% +2.9 7.35 ± 4% perf-profile.calltrace.cycles-pp.free_unref_page_commit.free_unref_page.__unfreeze_partials.rcu_do_batch.rcu_core
> 4.43 ± 3% +3.0 7.38 ± 4% perf-profile.calltrace.cycles-pp.free_unref_page.__unfreeze_partials.rcu_do_batch.rcu_core.__do_softirq
> 3.44 +3.5 6.99 perf-profile.calltrace.cycles-pp.syscall_exit_to_user_mode.do_syscall_64.entry_SYSCALL_64_after_hwframe.brk
> 3.91 +3.8 7.74 perf-profile.calltrace.cycles-pp.syscall_return_via_sysret.brk
> 4.63 +4.3 8.91 perf-profile.calltrace.cycles-pp.mas_store_gfp.do_vmi_align_munmap.__do_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe
> 83.68 +4.7 88.36 perf-profile.calltrace.cycles-pp.brk
> 0.00 +4.8 4.76 perf-profile.calltrace.cycles-pp.mas_wr_node_store.mas_wr_store_entry.mas_store_prealloc.vma_complete.__split_vma
> 0.00 +5.5 5.54 perf-profile.calltrace.cycles-pp.mas_wr_store_entry.mas_store_prealloc.vma_complete.__split_vma.do_vmi_align_munmap
> 32.01 +6.3 38.28 perf-profile.calltrace.cycles-pp.do_vmi_align_munmap.__do_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe.brk
> 0.00 +6.4 6.35 perf-profile.calltrace.cycles-pp.mas_wr_node_store.mas_wr_store_entry.mas_store_gfp.do_vmi_align_munmap.__do_sys_brk
> 0.82 +6.7 7.53 perf-profile.calltrace.cycles-pp.mas_wr_store_entry.mas_store_gfp.do_vmi_align_munmap.__do_sys_brk.do_syscall_64
> 29.25 -20.1 9.14 perf-profile.children.cycles-pp.mas_store_prealloc
> 33.60 -18.9 14.67 perf-profile.children.cycles-pp.do_brk_flags
> 27.84 -17.3 10.50 ± 2% perf-profile.children.cycles-pp._raw_spin_lock_irqsave
> 27.53 -17.1 10.38 ± 2% perf-profile.children.cycles-pp.native_queued_spin_lock_slowpath
> 13.75 -13.7 0.00 perf-profile.children.cycles-pp.mas_wr_bnode
> 13.22 -13.2 0.00 perf-profile.children.cycles-pp.kmem_cache_alloc_bulk
> 12.52 -12.5 0.00 perf-profile.children.cycles-pp.__kmem_cache_alloc_bulk
> 15.06 -10.7 4.36 perf-profile.children.cycles-pp.mas_alloc_nodes
> 15.78 -10.5 5.29 perf-profile.children.cycles-pp.mas_preallocate
> 10.28 -10.3 0.00 perf-profile.children.cycles-pp.mas_wr_spanning_store
> 12.34 -9.9 2.40 perf-profile.children.cycles-pp.___slab_alloc
> 9.30 -9.2 0.09 ± 4% perf-profile.children.cycles-pp.get_partial_node
> 69.68 -9.1 60.59 perf-profile.children.cycles-pp.__do_sys_brk
> 8.99 -9.0 0.00 perf-profile.children.cycles-pp.mas_split
> 27.56 -8.0 19.53 perf-profile.children.cycles-pp.rcu_do_batch
> 27.59 -8.0 19.56 perf-profile.children.cycles-pp.__do_softirq
> 27.58 -8.0 19.55 perf-profile.children.cycles-pp.rcu_core
> 7.37 -7.4 0.00 perf-profile.children.cycles-pp.mas_spanning_rebalance
> 7.54 -6.5 1.02 perf-profile.children.cycles-pp.mas_destroy
> 5.92 -5.9 0.00 perf-profile.children.cycles-pp.mas_topiary_replace
> 12.39 -5.8 6.61 perf-profile.children.cycles-pp.vma_complete
> 15.46 -5.0 10.49 ± 4% perf-profile.children.cycles-pp.smpboot_thread_fn
> 15.44 -5.0 10.48 ± 4% perf-profile.children.cycles-pp.run_ksoftirqd
> 15.47 -5.0 10.50 ± 4% perf-profile.children.cycles-pp.ret_from_fork_asm
> 15.47 -5.0 10.50 ± 4% perf-profile.children.cycles-pp.ret_from_fork
> 15.47 -5.0 10.50 ± 4% perf-profile.children.cycles-pp.kthread
> 8.32 -4.6 3.78 ± 2% perf-profile.children.cycles-pp.__slab_free
> 74.27 -4.5 69.76 perf-profile.children.cycles-pp.do_syscall_64
> 15.32 -4.2 11.08 ± 2% perf-profile.children.cycles-pp.__unfreeze_partials
> 20.53 -3.3 17.27 perf-profile.children.cycles-pp.__split_vma
> 12.15 ± 2% -3.1 9.09 ± 3% perf-profile.children.cycles-pp.irq_exit_rcu
> 12.47 ± 2% -3.0 9.42 ± 3% perf-profile.children.cycles-pp.sysvec_apic_timer_interrupt
> 12.50 ± 2% -3.0 9.46 ± 3% perf-profile.children.cycles-pp.asm_sysvec_apic_timer_interrupt
> 76.50 -2.3 74.18 perf-profile.children.cycles-pp.entry_SYSCALL_64_after_hwframe
> 1.91 ± 4% -1.8 0.16 ± 3% perf-profile.children.cycles-pp.get_any_partial
> 1.09 -0.9 0.14 ± 2% perf-profile.children.cycles-pp.memcpy_orig
> 1.72 -0.7 1.05 perf-profile.children.cycles-pp.mas_pop_node
> 1.14 -0.2 0.98 ± 2% perf-profile.children.cycles-pp.mas_prev_slot
> 1.71 ± 2% -0.1 1.57 ± 4% perf-profile.children.cycles-pp.rcu_cblist_dequeue
> 1.10 -0.1 0.98 perf-profile.children.cycles-pp.mas_next_slot
> 0.32 ± 2% -0.1 0.22 ± 3% perf-profile.children.cycles-pp.inc_slabs_node
> 0.60 ± 2% -0.1 0.52 perf-profile.children.cycles-pp.rcu_segcblist_enqueue
> 0.48 ± 2% -0.1 0.40 ± 2% perf-profile.children.cycles-pp.rcu_nocb_try_bypass
> 0.47 ± 2% -0.1 0.40 perf-profile.children.cycles-pp.alloc_pages_mpol
> 0.38 ± 3% -0.1 0.31 ± 2% perf-profile.children.cycles-pp.get_page_from_freelist
> 0.18 ± 2% -0.1 0.11 perf-profile.children.cycles-pp.__list_del_entry_valid_or_report
> 0.44 ± 3% -0.1 0.37 perf-profile.children.cycles-pp.__alloc_pages
> 0.27 ± 2% -0.1 0.22 ± 4% perf-profile.children.cycles-pp.mt_free_rcu
> 0.25 ± 3% -0.1 0.20 ± 3% perf-profile.children.cycles-pp.rmqueue
> 0.20 ± 6% -0.0 0.16 ± 3% perf-profile.children.cycles-pp.__rmqueue_pcplist
> 0.15 ± 3% -0.0 0.11 ± 5% perf-profile.children.cycles-pp.discard_slab
> 0.16 ± 4% -0.0 0.12 ± 3% perf-profile.children.cycles-pp.rmqueue_bulk
> 0.08 ± 5% -0.0 0.06 perf-profile.children.cycles-pp.__list_add_valid_or_report
> 0.24 ± 2% -0.0 0.22 ± 2% perf-profile.children.cycles-pp.__free_one_page
> 0.19 ± 2% +0.0 0.21 ± 3% perf-profile.children.cycles-pp.update_process_times
> 0.44 ± 2% +0.0 0.46 ± 4% perf-profile.children.cycles-pp.setup_object
> 1.00 +0.0 1.03 perf-profile.children.cycles-pp.shuffle_freelist
> 0.20 ± 3% +0.0 0.24 ± 4% perf-profile.children.cycles-pp.should_failslab
> 0.09 ± 4% +0.0 0.14 ± 3% perf-profile.children.cycles-pp.strlen
> 0.06 +0.0 0.11 ± 4% perf-profile.children.cycles-pp.__kmalloc_node
> 0.06 ± 8% +0.0 0.10 ± 4% perf-profile.children.cycles-pp.__init_rwsem
> 0.05 +0.0 0.10 ± 3% perf-profile.children.cycles-pp.__kmem_cache_alloc_node
> 0.00 +0.1 0.05 perf-profile.children.cycles-pp.memcg_account_kmem
> 0.00 +0.1 0.05 perf-profile.children.cycles-pp.testcase
> 0.06 +0.1 0.11 ± 4% perf-profile.children.cycles-pp.memcg_alloc_slab_cgroups
> 0.05 ± 7% +0.1 0.10 ± 4% perf-profile.children.cycles-pp.__pte_offset_map
> 0.00 +0.1 0.05 ± 8% perf-profile.children.cycles-pp.flush_tlb_batched_pending
> 0.00 +0.1 0.06 ± 8% perf-profile.children.cycles-pp.__free_slab
> 0.02 ±141% +0.1 0.08 ± 18% perf-profile.children.cycles-pp.machine__process_mmap2_event
> 0.07 ± 13% +0.1 0.13 ± 5% perf-profile.children.cycles-pp.may_expand_vm
> 0.05 ± 50% +0.1 0.11 ± 18% perf-profile.children.cycles-pp.perf_session__process_user_event
> 0.05 ± 50% +0.1 0.11 ± 18% perf-profile.children.cycles-pp.__ordered_events__flush
> 0.00 +0.1 0.06 ± 6% perf-profile.children.cycles-pp.memset_orig
> 0.12 ± 3% +0.1 0.18 ± 2% perf-profile.children.cycles-pp.anon_vma_clone
> 0.08 ± 4% +0.1 0.14 ± 3% perf-profile.children.cycles-pp.vma_dup_policy
> 0.07 ± 6% +0.1 0.14 ± 2% perf-profile.children.cycles-pp.free_pgd_range
> 0.03 ±100% +0.1 0.10 ± 20% perf-profile.children.cycles-pp.perf_session__deliver_event
> 0.00 +0.1 0.06 ± 7% perf-profile.children.cycles-pp.mas_prev
> 0.11 ± 3% +0.1 0.18 ± 2% perf-profile.children.cycles-pp.mas_node_count_gfp
> 0.01 ±223% +0.1 0.08 perf-profile.children.cycles-pp.tlb_batch_pages_flush
> 0.11 ± 6% +0.1 0.18 ± 2% perf-profile.children.cycles-pp.unmap_single_vma
> 1.17 +0.1 1.24 ± 2% perf-profile.children.cycles-pp.mtree_range_walk
> 0.09 ± 5% +0.1 0.17 ± 2% perf-profile.children.cycles-pp.up_read
> 0.02 ±141% +0.1 0.10 ± 6% perf-profile.children.cycles-pp.vma_prepare
> 0.06 ± 6% +0.1 0.14 ± 3% perf-profile.children.cycles-pp.can_vma_merge_after
> 0.10 ± 10% +0.1 0.19 ± 6% perf-profile.children.cycles-pp.kfree
> 0.08 ± 6% +0.1 0.16 ± 3% perf-profile.children.cycles-pp.strnlen
> 0.10 ± 4% +0.1 0.20 ± 2% perf-profile.children.cycles-pp.lru_add_drain_cpu
> 0.18 ± 2% +0.1 0.27 perf-profile.children.cycles-pp.tlb_gather_mmu
> 0.09 +0.1 0.19 ± 2% perf-profile.children.cycles-pp.refill_obj_stock
> 0.00 +0.1 0.10 ± 4% perf-profile.children.cycles-pp.mlock_drain_local
> 0.10 ± 5% +0.1 0.20 ± 2% perf-profile.children.cycles-pp.unlink_anon_vmas
> 0.11 ± 4% +0.1 0.21 ± 3% perf-profile.children.cycles-pp.khugepaged_enter_vma
> 0.10 ± 5% +0.1 0.20 perf-profile.children.cycles-pp.current_obj_cgroup
> 0.10 ± 6% +0.1 0.20 ± 2% perf-profile.children.cycles-pp.syscall_exit_to_user_mode_prepare
> 0.12 ± 5% +0.1 0.23 ± 3% perf-profile.children.cycles-pp._raw_spin_lock
> 0.14 ± 4% +0.1 0.26 perf-profile.children.cycles-pp.cap_mmap_addr
> 0.15 ± 6% +0.1 0.27 perf-profile.children.cycles-pp.exit_to_user_mode_prepare
> 0.10 ± 3% +0.1 0.23 perf-profile.children.cycles-pp.downgrade_write
> 0.14 ± 3% +0.1 0.28 perf-profile.children.cycles-pp.remove_vma
> 2.56 +0.1 2.70 perf-profile.children.cycles-pp.kmem_cache_free
> 0.00 +0.1 0.14 ± 2% perf-profile.children.cycles-pp.mas_is_err
> 0.14 ± 3% +0.1 0.28 perf-profile.children.cycles-pp.lru_add_drain
> 0.08 ± 5% +0.1 0.22 ± 2% perf-profile.children.cycles-pp.__vm_enough_memory
> 0.15 ± 3% +0.1 0.30 ± 2% perf-profile.children.cycles-pp.__x64_sys_brk
> 0.15 ± 3% +0.1 0.30 ± 2% perf-profile.children.cycles-pp.vma_adjust_trans_huge
> 0.22 ± 2% +0.2 0.38 ± 3% perf-profile.children.cycles-pp.rcu_all_qs
> 0.06 +0.2 0.24 ± 2% perf-profile.children.cycles-pp.mas_prev_range
> 0.16 ± 4% +0.2 0.35 perf-profile.children.cycles-pp.mas_wr_store_setup
> 0.24 ± 3% +0.2 0.42 perf-profile.children.cycles-pp.tlb_finish_mmu
> 0.22 ± 3% +0.2 0.41 perf-profile.children.cycles-pp.security_mmap_addr
> 0.20 ± 3% +0.2 0.39 ± 2% perf-profile.children.cycles-pp.cap_vm_enough_memory
> 0.17 ± 5% +0.2 0.36 ± 2% perf-profile.children.cycles-pp.percpu_counter_add_batch
> 0.14 ± 6% +0.2 0.34 ± 2% perf-profile.children.cycles-pp.strscpy
> 0.01 ±223% +0.2 0.24 perf-profile.children.cycles-pp.mas_wr_append
> 0.19 ± 4% +0.2 0.43 ± 2% perf-profile.children.cycles-pp.mas_nomem
> 0.25 +0.2 0.50 ± 2% perf-profile.children.cycles-pp.security_vm_enough_memory_mm
> 0.26 +0.3 0.51 ± 2% perf-profile.children.cycles-pp.entry_SYSRETQ_unsafe_stack
> 0.27 ± 2% +0.3 0.53 ± 2% perf-profile.children.cycles-pp.__pte_offset_map_lock
> 0.27 ± 2% +0.3 0.56 perf-profile.children.cycles-pp.arch_get_unmapped_area_topdown
> 0.35 ± 2% +0.3 0.68 perf-profile.children.cycles-pp.obj_cgroup_charge
> 0.36 ± 2% +0.4 0.72 ± 2% perf-profile.children.cycles-pp.mod_objcg_state
> 0.39 ± 3% +0.4 0.78 perf-profile.children.cycles-pp.up_write
> 0.44 ± 2% +0.4 0.85 ± 2% perf-profile.children.cycles-pp.free_pgtables
> 0.35 +0.4 0.77 perf-profile.children.cycles-pp.userfaultfd_unmap_complete
> 0.38 ± 2% +0.4 0.81 perf-profile.children.cycles-pp.down_write_killable
> 0.56 +0.4 1.01 ± 2% perf-profile.children.cycles-pp.down_write
> 0.53 ± 2% +0.5 1.00 perf-profile.children.cycles-pp.zap_pte_range
> 0.31 ± 2% +0.5 0.82 perf-profile.children.cycles-pp.mas_wr_end_piv
> 0.56 +0.5 1.10 perf-profile.children.cycles-pp.mas_leaf_max_gap
> 0.89 +0.6 1.45 perf-profile.children.cycles-pp.__cond_resched
> 0.64 ± 2% +0.6 1.20 perf-profile.children.cycles-pp.get_unmapped_area
> 0.72 ± 2% +0.6 1.32 ± 4% perf-profile.children.cycles-pp.syscall_enter_from_user_mode
> 0.48 ± 2% +0.6 1.08 perf-profile.children.cycles-pp.entry_SYSCALL_64_safe_stack
> 0.73 ± 2% +0.6 1.37 perf-profile.children.cycles-pp.check_brk_limits
> 0.77 ± 2% +0.7 1.50 perf-profile.children.cycles-pp.zap_pmd_range
> 0.94 +0.8 1.77 perf-profile.children.cycles-pp.memcg_slab_post_alloc_hook
> 0.68 +0.8 1.52 perf-profile.children.cycles-pp.mas_wr_walk
> 0.00 +0.9 0.90 perf-profile.children.cycles-pp.mas_wr_slot_store
> 1.22 +0.9 2.17 perf-profile.children.cycles-pp.vm_area_free_rcu_cb
> 1.14 ± 2% +1.1 2.20 perf-profile.children.cycles-pp.perf_event_mmap_output
> 0.91 +1.1 2.02 perf-profile.children.cycles-pp.mas_walk
> 1.32 +1.2 2.54 perf-profile.children.cycles-pp.unmap_page_range
> 3.44 +1.3 4.69 perf-profile.children.cycles-pp.__call_rcu_common
> 0.33 ± 4% +1.4 1.74 perf-profile.children.cycles-pp.mas_update_gap
> 1.63 +1.5 3.10 perf-profile.children.cycles-pp.perf_iterate_sb
> 1.79 +1.5 3.30 perf-profile.children.cycles-pp.unmap_vmas
> 1.60 +1.6 3.19 perf-profile.children.cycles-pp.mas_find
> 1.85 +1.9 3.73 perf-profile.children.cycles-pp.__entry_text_start
> 2.39 +2.2 4.60 perf-profile.children.cycles-pp.perf_event_mmap_event
> 2.62 +2.5 5.12 perf-profile.children.cycles-pp.perf_event_mmap
> 3.15 +2.6 5.79 perf-profile.children.cycles-pp.unmap_region
> 2.75 +2.8 5.55 perf-profile.children.cycles-pp.vm_area_dup
> 3.46 +3.6 7.04 perf-profile.children.cycles-pp.syscall_exit_to_user_mode
> 3.94 +3.9 7.80 perf-profile.children.cycles-pp.syscall_return_via_sysret
> 4.68 +4.3 9.03 perf-profile.children.cycles-pp.mas_store_gfp
> 3.74 +4.7 8.40 perf-profile.children.cycles-pp.kmem_cache_alloc
> 83.90 +4.9 88.80 perf-profile.children.cycles-pp.brk
> 32.12 +6.4 38.51 perf-profile.children.cycles-pp.do_vmi_align_munmap
> 0.24 ± 2% +11.0 11.20 perf-profile.children.cycles-pp.mas_wr_node_store
> 1.38 +13.6 14.95 perf-profile.children.cycles-pp.mas_wr_store_entry
> 27.53 -17.1 10.38 ± 2% perf-profile.self.cycles-pp.native_queued_spin_lock_slowpath
> 4.60 -0.8 3.76 ± 2% perf-profile.self.cycles-pp.__slab_free
> 0.94 -0.8 0.12 ± 4% perf-profile.self.cycles-pp.memcpy_orig
> 1.52 -0.6 0.94 perf-profile.self.cycles-pp.mas_pop_node
> 0.79 -0.5 0.30 perf-profile.self.cycles-pp.___slab_alloc
> 0.31 -0.2 0.12 ± 3% perf-profile.self.cycles-pp._raw_spin_lock_irqsave
> 0.28 ± 3% -0.2 0.09 ± 5% perf-profile.self.cycles-pp.__unfreeze_partials
> 1.68 ± 2% -0.1 1.55 ± 5% perf-profile.self.cycles-pp.rcu_cblist_dequeue
> 2.14 -0.1 2.02 perf-profile.self.cycles-pp.kmem_cache_free
> 0.37 ± 2% -0.1 0.28 perf-profile.self.cycles-pp.rcu_nocb_try_bypass
> 0.30 ± 2% -0.1 0.22 ± 3% perf-profile.self.cycles-pp.inc_slabs_node
> 0.52 ± 2% -0.1 0.46 ± 2% perf-profile.self.cycles-pp.rcu_segcblist_enqueue
> 0.17 ± 2% -0.1 0.10 ± 4% perf-profile.self.cycles-pp.__list_del_entry_valid_or_report
> 0.26 -0.0 0.21 ± 4% perf-profile.self.cycles-pp.mt_free_rcu
> 0.15 ± 3% -0.0 0.11 ± 3% perf-profile.self.cycles-pp.discard_slab
> 0.17 ± 2% -0.0 0.14 ± 2% perf-profile.self.cycles-pp.get_any_partial
> 0.08 ± 5% -0.0 0.06 perf-profile.self.cycles-pp.__list_add_valid_or_report
> 0.15 ± 3% -0.0 0.13 ± 3% perf-profile.self.cycles-pp.__free_one_page
> 0.10 ± 3% +0.0 0.12 ± 4% perf-profile.self.cycles-pp.rcu_segcblist_pend_cbs
> 0.08 ± 10% +0.0 0.10 ± 4% perf-profile.self.cycles-pp.should_failslab
> 0.08 +0.0 0.12 ± 3% perf-profile.self.cycles-pp.strlen
> 0.06 +0.0 0.10 ± 6% perf-profile.self.cycles-pp.vma_dup_policy
> 0.08 +0.0 0.12 ± 3% perf-profile.self.cycles-pp.anon_vma_clone
> 0.06 ± 9% +0.0 0.10 ± 6% perf-profile.self.cycles-pp.may_expand_vm
> 0.00 +0.1 0.05 perf-profile.self.cycles-pp.mas_prev
> 0.03 ± 70% +0.1 0.08 ± 5% perf-profile.self.cycles-pp.__init_rwsem
> 0.09 ± 8% +0.1 0.14 ± 4% perf-profile.self.cycles-pp.kfree
> 0.00 +0.1 0.06 ± 6% perf-profile.self.cycles-pp.__vm_enough_memory
> 0.07 ± 6% +0.1 0.13 ± 2% perf-profile.self.cycles-pp.mas_node_count_gfp
> 0.03 ± 70% +0.1 0.09 ± 7% perf-profile.self.cycles-pp.security_vm_enough_memory_mm
> 0.15 ± 3% +0.1 0.21 ± 11% perf-profile.self.cycles-pp.setup_object
> 0.00 +0.1 0.06 perf-profile.self.cycles-pp.memset_orig
> 0.07 ± 5% +0.1 0.13 ± 3% perf-profile.self.cycles-pp.security_mmap_addr
> 0.00 +0.1 0.06 ± 6% perf-profile.self.cycles-pp.tlb_batch_pages_flush
> 0.06 ± 7% +0.1 0.13 ± 3% perf-profile.self.cycles-pp.free_pgd_range
> 0.08 +0.1 0.15 ± 2% perf-profile.self.cycles-pp.check_brk_limits
> 0.08 ± 6% +0.1 0.14 ± 3% perf-profile.self.cycles-pp.khugepaged_enter_vma
> 0.09 ± 4% +0.1 0.17 ± 2% perf-profile.self.cycles-pp.unmap_single_vma
> 0.00 +0.1 0.08 ± 6% perf-profile.self.cycles-pp.vma_prepare
> 0.07 ± 5% +0.1 0.15 ± 4% perf-profile.self.cycles-pp.up_read
> 0.06 ± 7% +0.1 0.14 ± 5% perf-profile.self.cycles-pp.strnlen
> 0.16 ± 2% +0.1 0.24 perf-profile.self.cycles-pp.tlb_gather_mmu
> 0.07 +0.1 0.15 ± 3% perf-profile.self.cycles-pp.unlink_anon_vmas
> 0.09 ± 6% +0.1 0.17 perf-profile.self.cycles-pp.lru_add_drain_cpu
> 0.00 +0.1 0.08 perf-profile.self.cycles-pp.mlock_drain_local
> 0.04 ± 44% +0.1 0.12 ± 3% perf-profile.self.cycles-pp.can_vma_merge_after
> 0.14 ± 2% +0.1 0.22 ± 3% perf-profile.self.cycles-pp.get_unmapped_area
> 0.01 ±223% +0.1 0.09 ± 5% perf-profile.self.cycles-pp.__pte_offset_map
> 0.06 ± 7% +0.1 0.15 ± 3% perf-profile.self.cycles-pp.remove_vma
> 0.08 ± 4% +0.1 0.17 ± 3% perf-profile.self.cycles-pp.syscall_exit_to_user_mode_prepare
> 0.09 +0.1 0.18 ± 3% perf-profile.self.cycles-pp.refill_obj_stock
> 0.08 ± 4% +0.1 0.17 ± 3% perf-profile.self.cycles-pp.current_obj_cgroup
> 0.09 ± 4% +0.1 0.18 ± 2% perf-profile.self.cycles-pp.__pte_offset_map_lock
> 0.00 +0.1 0.10 ± 4% perf-profile.self.cycles-pp.mas_is_err
> 0.09 ± 6% +0.1 0.19 ± 3% perf-profile.self.cycles-pp.mas_nomem
> 0.11 ± 4% +0.1 0.21 ± 4% perf-profile.self.cycles-pp._raw_spin_lock
> 0.24 ± 2% +0.1 0.35 perf-profile.self.cycles-pp.mas_destroy
> 0.12 ± 3% +0.1 0.23 ± 2% perf-profile.self.cycles-pp.cap_mmap_addr
> 1.02 +0.1 1.13 perf-profile.self.cycles-pp.mtree_range_walk
> 0.15 ± 4% +0.1 0.26 ± 4% perf-profile.self.cycles-pp.rcu_all_qs
> 0.12 ± 6% +0.1 0.22 ± 2% perf-profile.self.cycles-pp.exit_to_user_mode_prepare
> 0.09 +0.1 0.20 ± 2% perf-profile.self.cycles-pp.downgrade_write
> 0.13 +0.1 0.25 ± 2% perf-profile.self.cycles-pp.__x64_sys_brk
> 0.22 ± 2% +0.1 0.34 ± 2% perf-profile.self.cycles-pp.unmap_vmas
> 0.13 ± 3% +0.1 0.26 ± 2% perf-profile.self.cycles-pp.vma_adjust_trans_huge
> 0.12 ± 4% +0.1 0.25 ± 2% perf-profile.self.cycles-pp.entry_SYSCALL_64_safe_stack
> 0.16 ± 3% +0.1 0.30 perf-profile.self.cycles-pp.tlb_finish_mmu
> 0.12 ± 4% +0.1 0.26 ± 2% perf-profile.self.cycles-pp.mas_wr_store_setup
> 0.14 ± 4% +0.2 0.29 ± 2% perf-profile.self.cycles-pp.syscall_enter_from_user_mode
> 0.14 ± 2% +0.2 0.31 perf-profile.self.cycles-pp.free_pgtables
> 0.12 ± 4% +0.2 0.28 perf-profile.self.cycles-pp.strscpy
> 0.00 +0.2 0.17 ± 4% perf-profile.self.cycles-pp.mas_prev_range
> 0.14 ± 4% +0.2 0.31 ± 2% perf-profile.self.cycles-pp.percpu_counter_add_batch
> 0.18 ± 2% +0.2 0.35 perf-profile.self.cycles-pp.cap_vm_enough_memory
> 0.18 ± 3% +0.2 0.36 ± 2% perf-profile.self.cycles-pp.zap_pte_range
> 0.15 ± 3% +0.2 0.33 ± 2% perf-profile.self.cycles-pp.zap_pmd_range
> 0.27 +0.2 0.47 perf-profile.self.cycles-pp.unmap_region
> 0.00 +0.2 0.20 ± 2% perf-profile.self.cycles-pp.mas_wr_append
> 0.00 +0.2 0.20 ± 3% perf-profile.self.cycles-pp.mas_wr_slot_store
> 0.18 ± 2% +0.2 0.39 perf-profile.self.cycles-pp.vma_complete
> 0.34 ± 5% +0.2 0.55 ± 3% perf-profile.self.cycles-pp.vm_area_free_rcu_cb
> 0.22 ± 2% +0.2 0.44 ± 2% perf-profile.self.cycles-pp.entry_SYSRETQ_unsafe_stack
> 0.45 ± 2% +0.2 0.68 perf-profile.self.cycles-pp.mas_alloc_nodes
> 0.20 ± 2% +0.2 0.43 ± 2% perf-profile.self.cycles-pp.down_write_killable
> 0.20 ± 3% +0.2 0.44 perf-profile.self.cycles-pp.perf_event_mmap
> 0.18 ± 3% +0.2 0.42 ± 2% perf-profile.self.cycles-pp.do_syscall_64
> 0.24 +0.3 0.49 perf-profile.self.cycles-pp.arch_get_unmapped_area_topdown
> 0.27 ± 3% +0.3 0.54 perf-profile.self.cycles-pp.obj_cgroup_charge
> 0.36 ± 2% +0.3 0.66 ± 3% perf-profile.self.cycles-pp.down_write
> 0.30 ± 2% +0.3 0.62 perf-profile.self.cycles-pp.vm_area_dup
> 0.32 ± 2% +0.3 0.64 ± 2% perf-profile.self.cycles-pp.mod_objcg_state
> 0.35 +0.3 0.68 perf-profile.self.cycles-pp.mas_walk
> 0.34 ± 2% +0.3 0.68 perf-profile.self.cycles-pp.perf_event_mmap_event
> 0.33 ± 2% +0.4 0.68 perf-profile.self.cycles-pp.up_write
> 0.44 ± 2% +0.4 0.80 perf-profile.self.cycles-pp.perf_iterate_sb
> 0.58 +0.4 0.94 ± 2% perf-profile.self.cycles-pp.__cond_resched
> 0.30 ± 2% +0.4 0.68 perf-profile.self.cycles-pp.userfaultfd_unmap_complete
> 0.51 +0.4 0.88 perf-profile.self.cycles-pp.mas_next_slot
> 0.44 ± 2% +0.4 0.82 perf-profile.self.cycles-pp.unmap_page_range
> 0.58 +0.4 0.96 perf-profile.self.cycles-pp.mas_find
> 0.26 +0.4 0.68 perf-profile.self.cycles-pp.mas_wr_end_piv
> 0.48 ± 2% +0.4 0.90 perf-profile.self.cycles-pp.brk
> 0.45 +0.4 0.88 perf-profile.self.cycles-pp.mas_prev_slot
> 0.49 +0.4 0.94 perf-profile.self.cycles-pp.mas_leaf_max_gap
> 0.34 ± 2% +0.4 0.78 perf-profile.self.cycles-pp.mas_store_prealloc
> 0.20 ± 3% +0.4 0.65 ± 2% perf-profile.self.cycles-pp.mas_update_gap
> 0.41 ± 2% +0.5 0.92 perf-profile.self.cycles-pp.mas_store_gfp
> 0.64 +0.6 1.23 perf-profile.self.cycles-pp.memcg_slab_post_alloc_hook
> 0.59 ± 2% +0.6 1.22 perf-profile.self.cycles-pp.__split_vma
> 0.44 ± 2% +0.7 1.10 perf-profile.self.cycles-pp.mas_wr_store_entry
> 0.66 +0.7 1.35 perf-profile.self.cycles-pp.mas_preallocate
> 0.59 +0.7 1.33 perf-profile.self.cycles-pp.do_brk_flags
> 0.58 +0.7 1.32 perf-profile.self.cycles-pp.mas_wr_walk
> 1.03 +0.8 1.81 perf-profile.self.cycles-pp.do_vmi_align_munmap
> 0.78 +0.8 1.57 perf-profile.self.cycles-pp.__do_sys_brk
> 1.79 +0.9 2.66 perf-profile.self.cycles-pp.__call_rcu_common
> 1.02 +1.0 1.98 perf-profile.self.cycles-pp.perf_event_mmap_output
> 1.33 +1.4 2.74 perf-profile.self.cycles-pp.kmem_cache_alloc
> 1.64 +1.7 3.30 perf-profile.self.cycles-pp.__entry_text_start
> 2.26 +2.2 4.50 perf-profile.self.cycles-pp.entry_SYSCALL_64_after_hwframe
> 3.23 +3.3 6.58 perf-profile.self.cycles-pp.syscall_exit_to_user_mode
> 0.21 ± 2% +3.6 3.82 perf-profile.self.cycles-pp.mas_wr_node_store
> 3.93 +3.9 7.78 perf-profile.self.cycles-pp.syscall_return_via_sysret
>
>
>
>
> Disclaimer:
> Results have been estimated based on internal Intel analysis and are provided
> for informational purposes only. Any difference in system hardware or software
> design or configuration may affect actual performance.
>
>
* Peng Zhang <[email protected]> [231204 02:15]:
>
>
> 在 2023/11/28 21:55, kernel test robot 写道:
> >
> >
> > Hello,
> >
> > kernel test robot noticed a 94.7% improvement of will-it-scale.per_process_ops on:
> >
> >
> > commit: 6e553c6bcb7746abad29ce63e0cb7a18348e88fb ("fork: use __mt_dup() to duplicate maple tree in dup_mmap()")
> > https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master
> >
> > testcase: will-it-scale
> > test machine: 104 threads 2 sockets (Skylake) with 192G memory
> > parameters:
> >
> > nr_task: 100%
> > mode: process
> > test: brk2
> > cpufreq_governor: performance
> >
> >
> >
> >
> >
> >
> > Details are as below:
> > -------------------------------------------------------------------------------------------------->
> >
> >
> > The kernel config and materials to reproduce are available at:
> > https://download.01.org/0day-ci/archive/20231128/[email protected]
> >
> > =========================================================================================
> > compiler/cpufreq_governor/kconfig/mode/nr_task/rootfs/tbox_group/test/testcase:
> > gcc-12/performance/x86_64-rhel-8.3/process/100%/debian-11.1-x86_64-20220510.cgz/lkp-skl-fpga01/brk2/will-it-scale
> >
> > commit:
> > ec81deb6b7 ("maple_tree: preserve the tree attributes when destroying maple tree")
> > 6e553c6bcb ("fork: use __mt_dup() to duplicate maple tree in dup_mmap()")
> >
> > ec81deb6b769dc1b 6e553c6bcb7746abad29ce63e0c
> > ---------------- ---------------------------
> > %stddev %change %stddev
> > \ | \
> > 24.47 -7.2 17.29 mpstat.cpu.all.soft%
> > 8.76 +7.6 16.36 mpstat.cpu.all.usr%
> > 8.80 +85.5% 16.33 vmstat.cpu.us
> > 7732 -18.3% 6318 vmstat.system.cs
> > 13467005 +94.7% 26223847 will-it-scale.104.processes
> > 129489 +94.7% 252151 will-it-scale.per_process_ops
> > 13467005 +94.7% 26223847 will-it-scale.workload
> > 1.792e+08 -13.6% 1.549e+08 numa-numastat.node0.local_node
> > 1.793e+08 -13.6% 1.549e+08 numa-numastat.node0.numa_hit
> > 1.867e+08 -12.6% 1.631e+08 numa-numastat.node1.local_node
> > 1.867e+08 -12.6% 1.632e+08 numa-numastat.node1.numa_hit
> > 1.793e+08 -13.6% 1.549e+08 numa-vmstat.node0.numa_hit
> > 1.792e+08 -13.6% 1.549e+08 numa-vmstat.node0.numa_local
> > 1.867e+08 -12.6% 1.631e+08 numa-vmstat.node1.numa_hit
> > 1.867e+08 -12.6% 1.631e+08 numa-vmstat.node1.numa_local
> > 122.70 +43.4 166.10 turbostat.PKG_%
> > 56.67 ± 2% -6.8% 52.83 ± 3% turbostat.PkgTmp
> > 376.36 +1.3% 381.14 turbostat.PkgWatt
> > 45.03 -5.8% 42.40 turbostat.RAMWatt
> > 121103 -2.7% 117803 proc-vmstat.nr_slab_unreclaimable
> > 68338 ± 7% +24.8% 85281 ± 6% proc-vmstat.numa_hint_faults
> > 3.66e+08 -13.1% 3.181e+08 proc-vmstat.numa_hit
> > 3.659e+08 -13.1% 3.18e+08 proc-vmstat.numa_local
> > 7.155e+08 -15.6% 6.038e+08 proc-vmstat.pgalloc_normal
> > 1025781 +2.6% 1052377 proc-vmstat.pgfault
> > 7.131e+08 -15.5% 6.028e+08 proc-vmstat.pgfree
> > 12305161 +10.3% 13578139 sched_debug.cfs_rq:/.avg_vruntime.avg
> > 12419603 +10.6% 13739004 sched_debug.cfs_rq:/.avg_vruntime.max
> > 122981 ± 5% +41.3% 173809 ± 12% sched_debug.cfs_rq:/.avg_vruntime.stddev
> > 376.33 ± 43% -53.5% 174.89 ± 34% sched_debug.cfs_rq:/.load_avg.avg
> > 85.75 ± 9% -59.1% 35.08 ± 16% sched_debug.cfs_rq:/.load_avg.min
> > 12305176 +10.3% 13578151 sched_debug.cfs_rq:/.min_vruntime.avg
> > 12419621 +10.6% 13739007 sched_debug.cfs_rq:/.min_vruntime.max
> > 122979 ± 5% +41.3% 173810 ± 12% sched_debug.cfs_rq:/.min_vruntime.stddev
> > 13056 -15.6% 11025 sched_debug.cpu.nr_switches.avg
> > 9228 -22.3% 7174 sched_debug.cpu.nr_switches.min
> > 0.28 ± 7% -63.7% 0.10 ± 10% perf-sched.sch_delay.avg.ms.schedule_timeout.rcu_gp_fqs_loop.rcu_gp_kthread.kthread
> > 0.08 ± 5% -27.0% 0.06 ± 8% perf-sched.sch_delay.avg.ms.smpboot_thread_fn.kthread.ret_from_fork.ret_from_fork_asm
> > 3.56 ± 45% -79.6% 0.73 ±199% perf-sched.sch_delay.max.ms.__cond_resched.smpboot_thread_fn.kthread.ret_from_fork.ret_from_fork_asm
> > 10.02 ± 62% -70.0% 3.01 ± 2% perf-sched.sch_delay.max.ms.schedule_timeout.rcu_gp_fqs_loop.rcu_gp_kthread.kthread
> > 11.16 ± 29% -48.2% 5.78 ± 45% perf-sched.sch_delay.max.ms.wait_for_partner.fifo_open.do_dentry_open.do_open
> > 41.80 +25.8% 52.58 perf-sched.total_wait_and_delay.average.ms
> > 37576 ± 2% -21.0% 29680 perf-sched.total_wait_and_delay.count.ms
> > 41.73 +25.8% 52.50 perf-sched.total_wait_time.average.ms
> > 4.50 ± 2% -16.1% 3.78 ± 6% perf-sched.wait_and_delay.avg.ms.__cond_resched.down_write.__split_vma.do_vmi_align_munmap.__do_sys_brk
> > 4.61 ± 6% -18.0% 3.78 ± 2% perf-sched.wait_and_delay.avg.ms.__cond_resched.down_write.do_brk_flags.__do_sys_brk.do_syscall_64
> > 4.26 ± 7% -11.7% 3.77 perf-sched.wait_and_delay.avg.ms.__cond_resched.kmem_cache_alloc.mas_alloc_nodes.mas_preallocate.__split_vma
> > 32.16 +53.0% 49.20 perf-sched.wait_and_delay.avg.ms.__cond_resched.smpboot_thread_fn.kthread.ret_from_fork.ret_from_fork_asm
> > 63.20 +35.4% 85.56 ± 2% perf-sched.wait_and_delay.avg.ms.smpboot_thread_fn.kthread.ret_from_fork.ret_from_fork_asm
> > 735.00 ± 2% -68.0% 234.83 ± 4% perf-sched.wait_and_delay.count.__cond_resched.down_write.__split_vma.do_vmi_align_munmap.__do_sys_brk
> > 3090 ± 6% -93.8% 190.50 ± 4% perf-sched.wait_and_delay.count.__cond_resched.down_write.do_brk_flags.__do_sys_brk.do_syscall_64
> > 975.67 ± 3% +61.5% 1576 perf-sched.wait_and_delay.count.__cond_resched.down_write_killable.__do_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe
> > 298.17 ± 4% +54.6% 461.00 ± 4% perf-sched.wait_and_delay.count.__cond_resched.kmem_cache_alloc.mas_alloc_nodes.mas_preallocate.__split_vma
> > 524.33 ± 4% +56.2% 819.17 ± 2% perf-sched.wait_and_delay.count.__cond_resched.kmem_cache_alloc.mas_alloc_nodes.mas_preallocate.do_brk_flags
> > 402.83 ± 2% +54.2% 621.17 ± 3% perf-sched.wait_and_delay.count.__cond_resched.kmem_cache_alloc.vm_area_dup.__split_vma.do_vmi_align_munmap
> > 265.50 ± 4% +28.7% 341.67 ± 2% perf-sched.wait_and_delay.count.__cond_resched.remove_vma.do_vmi_align_munmap.__do_sys_brk.do_syscall_64
> > 661.33 ± 7% -27.6% 478.83 ± 10% perf-sched.wait_and_delay.count.__cond_resched.smpboot_thread_fn.kthread.ret_from_fork.ret_from_fork_asm
> > 66.33 ±141% +310.3% 272.17 ± 7% perf-sched.wait_and_delay.count.__cond_resched.zap_pmd_range.isra.0.unmap_page_range
> > 1517 ± 4% +72.0% 2609 perf-sched.wait_and_delay.count.exit_to_user_mode_loop.exit_to_user_mode_prepare.irqentry_exit_to_user_mode.asm_sysvec_apic_timer_interrupt
> > 6322 ± 3% -41.1% 3725 ± 4% perf-sched.wait_and_delay.count.exit_to_user_mode_loop.exit_to_user_mode_prepare.syscall_exit_to_user_mode.do_syscall_64
> > 14299 ± 2% -25.3% 10677 perf-sched.wait_and_delay.count.smpboot_thread_fn.kthread.ret_from_fork.ret_from_fork_asm
> > 19.65 ± 25% -38.8% 12.03 ± 7% perf-sched.wait_and_delay.max.ms.__cond_resched.down_write.__split_vma.do_vmi_align_munmap.__do_sys_brk
> > 20.07 ± 27% -42.3% 11.57 ± 8% perf-sched.wait_and_delay.max.ms.__cond_resched.down_write.do_brk_flags.__do_sys_brk.do_syscall_64
> > 18.62 ± 28% -32.5% 12.56 ± 12% perf-sched.wait_and_delay.max.ms.__cond_resched.kmem_cache_alloc.vm_area_dup.__split_vma.do_vmi_align_munmap
> > 71.03 ± 10% +44.2% 102.39 ± 36% perf-sched.wait_and_delay.max.ms.__cond_resched.smpboot_thread_fn.kthread.ret_from_fork.ret_from_fork_asm
> > 23.72 ± 26% -33.5% 15.79 ± 12% perf-sched.wait_and_delay.max.ms.__cond_resched.unmap_vmas.unmap_region.constprop.0
> > 14.70 ± 21% -33.3% 9.80 ± 2% perf-sched.wait_and_delay.max.ms.schedule_timeout.rcu_gp_fqs_loop.rcu_gp_kthread.kthread
> > 4.50 ± 2% -16.1% 3.78 ± 6% perf-sched.wait_time.avg.ms.__cond_resched.down_write.__split_vma.do_vmi_align_munmap.__do_sys_brk
> > 4.61 ± 6% -18.0% 3.78 ± 2% perf-sched.wait_time.avg.ms.__cond_resched.down_write.do_brk_flags.__do_sys_brk.do_syscall_64
> > 4.26 ± 7% -11.7% 3.77 perf-sched.wait_time.avg.ms.__cond_resched.kmem_cache_alloc.mas_alloc_nodes.mas_preallocate.__split_vma
> > 4.26 ± 9% -100.0% 0.00 perf-sched.wait_time.avg.ms.__cond_resched.kmem_cache_alloc_bulk.mas_alloc_nodes.mas_preallocate.__split_vma
> > 4.61 ± 3% -100.0% 0.00 perf-sched.wait_time.avg.ms.__cond_resched.kmem_cache_alloc_bulk.mas_alloc_nodes.mas_preallocate.do_brk_flags
> > 32.13 +53.1% 49.19 perf-sched.wait_time.avg.ms.__cond_resched.smpboot_thread_fn.kthread.ret_from_fork.ret_from_fork_asm
> > 63.12 +35.5% 85.50 ± 2% perf-sched.wait_time.avg.ms.smpboot_thread_fn.kthread.ret_from_fork.ret_from_fork_asm
> > 19.65 ± 25% -38.8% 12.03 ± 7% perf-sched.wait_time.max.ms.__cond_resched.down_write.__split_vma.do_vmi_align_munmap.__do_sys_brk
> > 20.07 ± 27% -42.3% 11.57 ± 8% perf-sched.wait_time.max.ms.__cond_resched.down_write.do_brk_flags.__do_sys_brk.do_syscall_64
> > 18.62 ± 28% -32.5% 12.56 ± 12% perf-sched.wait_time.max.ms.__cond_resched.kmem_cache_alloc.vm_area_dup.__split_vma.do_vmi_align_munmap
> > 16.69 ± 36% -100.0% 0.00 perf-sched.wait_time.max.ms.__cond_resched.kmem_cache_alloc_bulk.mas_alloc_nodes.mas_preallocate.__split_vma
> > 16.03 ± 17% -100.0% 0.00 perf-sched.wait_time.max.ms.__cond_resched.kmem_cache_alloc_bulk.mas_alloc_nodes.mas_preallocate.do_brk_flags
> > 70.43 ± 10% +45.4% 102.38 ± 36% perf-sched.wait_time.max.ms.__cond_resched.smpboot_thread_fn.kthread.ret_from_fork.ret_from_fork_asm
> > 23.72 ± 26% -33.5% 15.79 ± 12% perf-sched.wait_time.max.ms.__cond_resched.unmap_vmas.unmap_region.constprop.0
> > 17.57 ± 34% -29.3% 12.43 ± 7% perf-sched.wait_time.max.ms.__cond_resched.zap_pmd_range.isra.0.unmap_page_range
> > 8.69 ± 9% -20.8% 6.88 perf-sched.wait_time.max.ms.schedule_timeout.rcu_gp_fqs_loop.rcu_gp_kthread.kthread
> > 2.62 -12.2% 2.30 perf-stat.i.MPKI
> > 2.471e+10 +5.8% 2.614e+10 perf-stat.i.branch-instructions
> > 0.82 +0.1 0.90 ± 3% perf-stat.i.branch-miss-rate%
> > 2.032e+08 +14.1% 2.319e+08 perf-stat.i.branch-misses
> > 61.39 +1.3 62.74 perf-stat.i.cache-miss-rate%
> > 3.567e+08 -14.2% 3.061e+08 perf-stat.i.cache-misses
> > 5.81e+08 -16.2% 4.871e+08 perf-stat.i.cache-references
> > 7695 -18.5% 6271 perf-stat.i.context-switches
> > 2.04 +2.6% 2.09 perf-stat.i.cpi
> > 249.60 -26.8% 182.76 perf-stat.i.cpu-migrations
> > 780.53 +16.7% 911.09 perf-stat.i.cycles-between-cache-misses
> > 0.05 +0.0 0.08 ± 4% perf-stat.i.dTLB-load-miss-rate%
> > 15775916 +75.7% 27724344 perf-stat.i.dTLB-load-misses
> > 3.43e+10 +5.8% 3.63e+10 perf-stat.i.dTLB-loads
> > 459336 ± 4% -18.1% 376380 ± 10% perf-stat.i.dTLB-store-misses
> > 2.189e+10 -2.7% 2.13e+10 perf-stat.i.dTLB-stores
> > 31159069 +37.1% 42716400 perf-stat.i.iTLB-load-misses
> > 456253 ± 4% +83.6% 837671 ± 31% perf-stat.i.iTLB-loads
> > 1.364e+11 -1.9% 1.337e+11 perf-stat.i.instructions
> > 4379 -28.5% 3131 perf-stat.i.instructions-per-iTLB-miss
> > 0.49 -2.1% 0.48 perf-stat.i.ipc
> > 1327 -23.4% 1017 perf-stat.i.metric.K/sec
> > 783.30 +3.4% 809.81 perf-stat.i.metric.M/sec
> > 2733 +2.7% 2807 perf-stat.i.minor-faults
> > 4668970 -23.7% 3562283 ± 12% perf-stat.i.node-load-misses
> > 44341556 -21.0% 35024109 ± 2% perf-stat.i.node-loads
> > 2.44 -0.5 1.91 ± 9% perf-stat.i.node-store-miss-rate%
> > 2146790 -44.9% 1183052 ± 2% perf-stat.i.node-store-misses
> > 85964398 -24.9% 64569512 ± 2% perf-stat.i.node-stores
> > 2733 +2.7% 2807 perf-stat.i.page-faults
> > 2.62 -12.5% 2.29 perf-stat.overall.MPKI
> > 0.82 +0.1 0.89 perf-stat.overall.branch-miss-rate%
> > 61.39 +1.4 62.83 perf-stat.overall.cache-miss-rate%
> > 2.04 +2.1% 2.08 perf-stat.overall.cpi
> > 780.25 +16.6% 910.13 perf-stat.overall.cycles-between-cache-misses
> > 0.05 +0.0 0.08 perf-stat.overall.dTLB-load-miss-rate%
> > 0.00 ± 4% -0.0 0.00 ± 10% perf-stat.overall.dTLB-store-miss-rate%
> > 4376 -28.5% 3130 perf-stat.overall.instructions-per-iTLB-miss
> > 0.49 -2.0% 0.48 perf-stat.overall.ipc
> > 2.44 -0.6 1.80 ± 2% perf-stat.overall.node-store-miss-rate%
> > 3051945 -49.6% 1539638 perf-stat.overall.path-length
> > 2.462e+10 +5.8% 2.605e+10 perf-stat.ps.branch-instructions
> > 2.025e+08 +14.1% 2.311e+08 perf-stat.ps.branch-misses
> > 3.555e+08 -14.2% 3.051e+08 perf-stat.ps.cache-misses
> > 5.791e+08 -16.2% 4.855e+08 perf-stat.ps.cache-references
> > 7668 -18.5% 6250 perf-stat.ps.context-switches
> > 248.68 -26.7% 182.19 perf-stat.ps.cpu-migrations
> > 15739140 +75.6% 27640979 perf-stat.ps.dTLB-load-misses
> > 3.418e+10 +5.8% 3.618e+10 perf-stat.ps.dTLB-loads
> > 458389 ± 4% -18.1% 375627 ± 10% perf-stat.ps.dTLB-store-misses
> > 2.181e+10 -2.7% 2.123e+10 perf-stat.ps.dTLB-stores
> > 31053977 +37.1% 42572874 perf-stat.ps.iTLB-load-misses
> > 454414 ± 4% +83.8% 835372 ± 31% perf-stat.ps.iTLB-loads
> > 1.359e+11 -1.9% 1.333e+11 perf-stat.ps.instructions
> > 2730 +2.6% 2802 perf-stat.ps.minor-faults
> > 4653258 -23.7% 3549888 ± 12% perf-stat.ps.node-load-misses
> > 44203348 -21.0% 34917073 ± 2% perf-stat.ps.node-loads
> > 2139791 -44.9% 1179122 ± 2% perf-stat.ps.node-store-misses
> > 85677729 -24.9% 64357015 ± 2% perf-stat.ps.node-stores
> > 2731 +2.6% 2803 perf-stat.ps.page-faults
> > 4.11e+13 -1.8% 4.038e+13 perf-stat.total.instructions
> > 33.52 -19.0 14.50 perf-profile.calltrace.cycles-pp.do_brk_flags.__do_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe.brk
> > 17.05 -14.1 2.93 perf-profile.calltrace.cycles-pp.mas_store_prealloc.do_brk_flags.__do_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe
> Hi, Liam
>
> From the performance data shown above, we can see that there is a
> significant variation in the overhead of mas_store_prealloc() within
> the do_brk_flags() function. I speculate that the maple tree duplicated
> through __mt_dup() has a different structure compared to the maple tree
> duplicated through bulk store. In this test case, the maple tree duplicated
> through __mt_dup() triggers a fast path for maple tree store operations,
> thus avoiding memory allocation. It also avoids the slow path for maple
> tree store operations.
>
Hi Peng,
Thanks for the analysis. I would expect such a difference to be
equalised the first loop - the maple tree would be expanded to make
space and then contracted, but each new loop should cause a node store.
If your speculation is correct, then we were causing a contraction
followed by an expansion; effectively 'jittering' after a fork. I will
add this to the work items to investigate and see if we are not hitting
this in other scenarios.
This speculation looks correct considering we see a reduction of
spanning stores and associated allocations/cleanup. I'm guessing we
filled the nodes too much and the brk VMA was the last entry in a node,
and so we end up rebalancing to relocate that entry and constantly hit
our worst case. It's probably never fixed to avoid causing a larger
rebalance event. Hopefully this only shows up in the old fork method.
There is also a lot of down_write and __split_vma delta, which is odd.
Perhaps the __split_vma could be explained by the jittering during a
split. Maybe the down_write is due to the excessive time in allocations
and thus potentially triggering a timeout that ends up causing a
rescheduling.
Either way, this is a welcomed result. Thanks for having a look at
these numbers, and for the patches that caused them.
Apologies for leaving all the benchmarking data in the reply, but
perhaps there is more to add that I've missed in this data.
Regards,
Liam
> > 11.58 -11.6 0.00 perf-profile.calltrace.cycles-pp.___slab_alloc.__kmem_cache_alloc_bulk.kmem_cache_alloc_bulk.mas_alloc_nodes.mas_preallocate
> > 10.92 -10.9 0.00 perf-profile.calltrace.cycles-pp.kmem_cache_alloc_bulk.mas_alloc_nodes.mas_preallocate.do_brk_flags.__do_sys_brk
> > 10.60 -10.6 0.00 perf-profile.calltrace.cycles-pp.__kmem_cache_alloc_bulk.kmem_cache_alloc_bulk.mas_alloc_nodes.mas_preallocate.do_brk_flags
> > 10.54 -10.5 0.00 perf-profile.calltrace.cycles-pp.mas_wr_bnode.mas_store_prealloc.vma_complete.__split_vma.do_vmi_align_munmap
> > 10.26 -10.3 0.00 perf-profile.calltrace.cycles-pp.mas_wr_spanning_store.mas_store_prealloc.do_brk_flags.__do_sys_brk.do_syscall_64
> > 11.70 -9.9 1.78 perf-profile.calltrace.cycles-pp.mas_alloc_nodes.mas_preallocate.do_brk_flags.__do_sys_brk.do_syscall_64
> > 12.19 -9.2 2.97 perf-profile.calltrace.cycles-pp.mas_preallocate.do_brk_flags.__do_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe
> > 69.63 -9.1 60.49 perf-profile.calltrace.cycles-pp.__do_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe.brk
> > 8.93 -8.9 0.00 perf-profile.calltrace.cycles-pp.mas_split.mas_wr_bnode.mas_store_prealloc.vma_complete.__split_vma
> > 7.42 -7.4 0.00 perf-profile.calltrace.cycles-pp.get_partial_node.___slab_alloc.__kmem_cache_alloc_bulk.kmem_cache_alloc_bulk.mas_alloc_nodes
> > 7.32 -7.3 0.00 perf-profile.calltrace.cycles-pp.mas_spanning_rebalance.mas_wr_spanning_store.mas_store_prealloc.do_brk_flags.__do_sys_brk
> > 12.16 -6.0 6.13 perf-profile.calltrace.cycles-pp.mas_store_prealloc.vma_complete.__split_vma.do_vmi_align_munmap.__do_sys_brk
> > 12.28 -5.9 6.43 perf-profile.calltrace.cycles-pp.vma_complete.__split_vma.do_vmi_align_munmap.__do_sys_brk.do_syscall_64
> > 6.38 -5.6 0.73 ± 2% perf-profile.calltrace.cycles-pp.mas_destroy.mas_store_prealloc.do_brk_flags.__do_sys_brk.do_syscall_64
> > 15.46 -5.0 10.49 ± 4% perf-profile.calltrace.cycles-pp.smpboot_thread_fn.kthread.ret_from_fork.ret_from_fork_asm
> > 15.44 -5.0 10.48 ± 4% perf-profile.calltrace.cycles-pp.__do_softirq.run_ksoftirqd.smpboot_thread_fn.kthread.ret_from_fork
> > 15.44 -5.0 10.48 ± 4% perf-profile.calltrace.cycles-pp.run_ksoftirqd.smpboot_thread_fn.kthread.ret_from_fork.ret_from_fork_asm
> > 15.47 -5.0 10.50 ± 4% perf-profile.calltrace.cycles-pp.ret_from_fork_asm
> > 15.47 -5.0 10.50 ± 4% perf-profile.calltrace.cycles-pp.ret_from_fork.ret_from_fork_asm
> > 15.47 -5.0 10.50 ± 4% perf-profile.calltrace.cycles-pp.kthread.ret_from_fork.ret_from_fork_asm
> > 15.44 -5.0 10.48 ± 4% perf-profile.calltrace.cycles-pp.rcu_core.__do_softirq.run_ksoftirqd.smpboot_thread_fn.kthread
> > 15.42 -5.0 10.46 ± 4% perf-profile.calltrace.cycles-pp.rcu_do_batch.rcu_core.__do_softirq.run_ksoftirqd.smpboot_thread_fn
> > 74.20 -4.5 69.66 perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.brk
> > 20.44 -3.4 17.09 perf-profile.calltrace.cycles-pp.__split_vma.do_vmi_align_munmap.__do_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe
> > 3.84 -2.5 1.34 ± 4% perf-profile.calltrace.cycles-pp.__slab_free.rcu_do_batch.rcu_core.__do_softirq.run_ksoftirqd
> > 76.40 -2.4 74.03 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe.brk
> > 4.90 ± 2% -2.0 2.86 ± 4% perf-profile.calltrace.cycles-pp.rcu_core.__do_softirq.irq_exit_rcu.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt
> > 4.89 ± 2% -2.0 2.84 ± 4% perf-profile.calltrace.cycles-pp.rcu_do_batch.rcu_core.__do_softirq.irq_exit_rcu.sysvec_apic_timer_interrupt
> > 2.88 -1.9 1.03 perf-profile.calltrace.cycles-pp.mas_alloc_nodes.mas_preallocate.__split_vma.do_vmi_align_munmap.__do_sys_brk
> > 3.53 -1.3 2.22 perf-profile.calltrace.cycles-pp.mas_preallocate.__split_vma.do_vmi_align_munmap.__do_sys_brk.do_syscall_64
> > 0.95 ± 3% -0.2 0.71 ± 4% perf-profile.calltrace.cycles-pp.rcu_cblist_dequeue.rcu_do_batch.rcu_core.__do_softirq.run_ksoftirqd
> > 0.71 -0.1 0.62 ± 2% perf-profile.calltrace.cycles-pp.kmem_cache_free.rcu_do_batch.rcu_core.__do_softirq.run_ksoftirqd
> > 0.74 ± 3% +0.2 0.94 ± 4% perf-profile.calltrace.cycles-pp.__unfreeze_partials.rcu_do_batch.rcu_core.__do_softirq.irq_exit_rcu
> > 0.67 +0.3 0.97 ± 3% perf-profile.calltrace.cycles-pp.vm_area_free_rcu_cb.rcu_do_batch.rcu_core.__do_softirq.run_ksoftirqd
> > 0.56 ± 2% +0.4 0.97 ± 5% perf-profile.calltrace.cycles-pp.irq_exit_rcu.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt.syscall_enter_from_user_mode.do_syscall_64
> > 0.56 ± 2% +0.4 0.97 ± 5% perf-profile.calltrace.cycles-pp.__do_softirq.irq_exit_rcu.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt.syscall_enter_from_user_mode
> > 0.58 ± 2% +0.4 1.01 ± 5% perf-profile.calltrace.cycles-pp.asm_sysvec_apic_timer_interrupt.syscall_enter_from_user_mode.do_syscall_64.entry_SYSCALL_64_after_hwframe.brk
> > 0.58 ± 2% +0.4 1.01 ± 5% perf-profile.calltrace.cycles-pp.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt.syscall_enter_from_user_mode.do_syscall_64.entry_SYSCALL_64_after_hwframe
> > 0.00 +0.5 0.51 perf-profile.calltrace.cycles-pp.mas_pop_node.mas_wr_node_store.mas_wr_store_entry.mas_store_gfp.do_vmi_align_munmap
> > 0.00 +0.5 0.52 ± 2% perf-profile.calltrace.cycles-pp.__pte_offset_map_lock.zap_pte_range.zap_pmd_range.unmap_page_range.unmap_vmas
> > 0.00 +0.5 0.53 ± 2% perf-profile.calltrace.cycles-pp.mas_pop_node.mas_wr_node_store.mas_wr_store_entry.mas_store_prealloc.vma_complete
> > 0.00 +0.5 0.54 perf-profile.calltrace.cycles-pp.mas_update_gap.mas_wr_node_store.mas_wr_store_entry.mas_store_prealloc.vma_complete
> > 0.43 ± 44% +0.5 0.97 perf-profile.calltrace.cycles-pp.zap_pte_range.zap_pmd_range.unmap_page_range.unmap_vmas.unmap_region
> > 0.00 +0.5 0.55 perf-profile.calltrace.cycles-pp.arch_get_unmapped_area_topdown.get_unmapped_area.check_brk_limits.__do_sys_brk.do_syscall_64
> > 0.63 ± 2% +0.6 1.18 perf-profile.calltrace.cycles-pp.get_unmapped_area.check_brk_limits.__do_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe
> > 0.00 +0.6 0.56 ± 3% perf-profile.calltrace.cycles-pp.kmem_cache_free.mas_destroy.mas_store_prealloc.do_brk_flags.__do_sys_brk
> > 6.03 ± 2% +0.6 6.62 ± 4% perf-profile.calltrace.cycles-pp.__unfreeze_partials.rcu_do_batch.rcu_core.__do_softirq.run_ksoftirqd
> > 0.71 ± 2% +0.6 1.31 ± 4% perf-profile.calltrace.cycles-pp.syscall_enter_from_user_mode.do_syscall_64.entry_SYSCALL_64_after_hwframe.brk
> > 0.00 +0.6 0.63 ± 2% perf-profile.calltrace.cycles-pp.mas_update_gap.mas_wr_slot_store.mas_wr_store_entry.mas_store_prealloc.do_brk_flags
> > 0.73 ± 2% +0.6 1.36 perf-profile.calltrace.cycles-pp.check_brk_limits.__do_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe.brk
> > 0.00 +0.7 0.68 perf-profile.calltrace.cycles-pp.obj_cgroup_charge.kmem_cache_alloc.vm_area_dup.__split_vma.do_vmi_align_munmap
> > 0.00 +0.7 0.69 perf-profile.calltrace.cycles-pp.___slab_alloc.kmem_cache_alloc.mas_alloc_nodes.mas_preallocate.do_brk_flags
> > 0.74 ± 2% +0.7 1.46 perf-profile.calltrace.cycles-pp.zap_pmd_range.unmap_page_range.unmap_vmas.unmap_region.do_vmi_align_munmap
> > 0.00 +0.7 0.72 perf-profile.calltrace.cycles-pp.___slab_alloc.kmem_cache_alloc.mas_alloc_nodes.mas_wr_node_store.mas_wr_store_entry
> > 0.00 +0.7 0.72 perf-profile.calltrace.cycles-pp.kmem_cache_alloc.mas_alloc_nodes.mas_preallocate.__split_vma.do_vmi_align_munmap
> > 0.00 +0.7 0.74 perf-profile.calltrace.cycles-pp.allocate_slab.___slab_alloc.kmem_cache_alloc.vm_area_dup.__split_vma
> > 0.72 +0.7 1.46 perf-profile.calltrace.cycles-pp.memcg_slab_post_alloc_hook.kmem_cache_alloc.vm_area_dup.__split_vma.do_vmi_align_munmap
> > 0.00 +0.8 0.76 perf-profile.calltrace.cycles-pp.userfaultfd_unmap_complete.__do_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe.brk
> > 0.00 +0.8 0.78 perf-profile.calltrace.cycles-pp.down_write_killable.__do_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe.brk
> > 0.00 +0.8 0.80 ± 2% perf-profile.calltrace.cycles-pp.free_pgtables.unmap_region.do_vmi_align_munmap.__do_sys_brk.do_syscall_64
> > 1.00 ± 5% +0.9 1.89 ± 4% perf-profile.calltrace.cycles-pp.__do_softirq.irq_exit_rcu.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt.brk
> > 1.00 ± 5% +0.9 1.89 ± 4% perf-profile.calltrace.cycles-pp.irq_exit_rcu.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt.brk
> > 0.00 +0.9 0.89 perf-profile.calltrace.cycles-pp.mas_wr_slot_store.mas_wr_store_entry.mas_store_prealloc.do_brk_flags.__do_sys_brk
> > 1.03 ± 5% +0.9 1.94 ± 4% perf-profile.calltrace.cycles-pp.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt.brk
> > 0.56 +0.9 1.48 perf-profile.calltrace.cycles-pp.kmem_cache_alloc.mas_alloc_nodes.mas_preallocate.do_brk_flags.__do_sys_brk
> > 1.04 ± 4% +0.9 1.96 ± 4% perf-profile.calltrace.cycles-pp.asm_sysvec_apic_timer_interrupt.brk
> > 0.00 +1.0 0.98 perf-profile.calltrace.cycles-pp.___slab_alloc.kmem_cache_alloc.vm_area_dup.__split_vma.do_vmi_align_munmap
> > 0.25 ±100% +1.0 1.24 ± 2% perf-profile.calltrace.cycles-pp.mtree_range_walk.mas_walk.mas_find.__do_sys_brk.do_syscall_64
> > 0.75 +1.0 1.74 perf-profile.calltrace.cycles-pp.mas_walk.mas_find.__do_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe
> > 0.55 +1.0 1.57 ± 2% perf-profile.calltrace.cycles-pp.__call_rcu_common.do_vmi_align_munmap.__do_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe
> > 1.13 ± 2% +1.1 2.18 perf-profile.calltrace.cycles-pp.perf_event_mmap_output.perf_iterate_sb.perf_event_mmap_event.perf_event_mmap.do_brk_flags
> > 0.95 +1.1 2.03 perf-profile.calltrace.cycles-pp.mas_find.__do_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe.brk
> > 1.30 ± 2% +1.2 2.49 perf-profile.calltrace.cycles-pp.unmap_page_range.unmap_vmas.unmap_region.do_vmi_align_munmap.__do_sys_brk
> > 0.00 +1.3 1.28 perf-profile.calltrace.cycles-pp.kmem_cache_alloc.mas_alloc_nodes.mas_wr_node_store.mas_wr_store_entry.mas_store_gfp
> > 1.50 +1.4 2.90 perf-profile.calltrace.cycles-pp.__entry_text_start.brk
> > 1.62 +1.5 3.08 perf-profile.calltrace.cycles-pp.perf_iterate_sb.perf_event_mmap_event.perf_event_mmap.do_brk_flags.__do_sys_brk
> > 1.78 +1.5 3.28 perf-profile.calltrace.cycles-pp.unmap_vmas.unmap_region.do_vmi_align_munmap.__do_sys_brk.do_syscall_64
> > 0.00 +1.5 1.52 ± 2% perf-profile.calltrace.cycles-pp.__call_rcu_common.mas_wr_node_store.mas_wr_store_entry.mas_store_gfp.do_vmi_align_munmap
> > 0.00 +1.5 1.52 perf-profile.calltrace.cycles-pp.mas_alloc_nodes.mas_wr_node_store.mas_wr_store_entry.mas_store_gfp.do_vmi_align_munmap
> > 0.00 +1.5 1.53 perf-profile.calltrace.cycles-pp.__call_rcu_common.mas_wr_node_store.mas_wr_store_entry.mas_store_prealloc.vma_complete
> > 0.00 +1.7 1.74 perf-profile.calltrace.cycles-pp.mas_wr_store_entry.mas_store_prealloc.do_brk_flags.__do_sys_brk.do_syscall_64
> > 0.00 +1.9 1.90 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_safe_stack.brk
> > 2.35 +2.2 4.51 perf-profile.calltrace.cycles-pp.perf_event_mmap_event.perf_event_mmap.do_brk_flags.__do_sys_brk.do_syscall_64
> > 2.30 +2.4 4.65 perf-profile.calltrace.cycles-pp.kmem_cache_alloc.vm_area_dup.__split_vma.do_vmi_align_munmap.__do_sys_brk
> > 2.62 +2.5 5.10 perf-profile.calltrace.cycles-pp.perf_event_mmap.do_brk_flags.__do_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe
> > 3.12 +2.6 5.70 perf-profile.calltrace.cycles-pp.unmap_region.do_vmi_align_munmap.__do_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe
> > 2.74 +2.8 5.53 perf-profile.calltrace.cycles-pp.vm_area_dup.__split_vma.do_vmi_align_munmap.__do_sys_brk.do_syscall_64
> > 4.28 ± 3% +2.9 7.16 ± 4% perf-profile.calltrace.cycles-pp._raw_spin_lock_irqsave.free_pcppages_bulk.free_unref_page_commit.free_unref_page.__unfreeze_partials
> > 4.38 ± 3% +2.9 7.31 ± 4% perf-profile.calltrace.cycles-pp.free_pcppages_bulk.free_unref_page_commit.free_unref_page.__unfreeze_partials.rcu_do_batch
> > 4.41 ± 3% +2.9 7.35 ± 4% perf-profile.calltrace.cycles-pp.free_unref_page_commit.free_unref_page.__unfreeze_partials.rcu_do_batch.rcu_core
> > 4.43 ± 3% +3.0 7.38 ± 4% perf-profile.calltrace.cycles-pp.free_unref_page.__unfreeze_partials.rcu_do_batch.rcu_core.__do_softirq
> > 3.44 +3.5 6.99 perf-profile.calltrace.cycles-pp.syscall_exit_to_user_mode.do_syscall_64.entry_SYSCALL_64_after_hwframe.brk
> > 3.91 +3.8 7.74 perf-profile.calltrace.cycles-pp.syscall_return_via_sysret.brk
> > 4.63 +4.3 8.91 perf-profile.calltrace.cycles-pp.mas_store_gfp.do_vmi_align_munmap.__do_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe
> > 83.68 +4.7 88.36 perf-profile.calltrace.cycles-pp.brk
> > 0.00 +4.8 4.76 perf-profile.calltrace.cycles-pp.mas_wr_node_store.mas_wr_store_entry.mas_store_prealloc.vma_complete.__split_vma
> > 0.00 +5.5 5.54 perf-profile.calltrace.cycles-pp.mas_wr_store_entry.mas_store_prealloc.vma_complete.__split_vma.do_vmi_align_munmap
> > 32.01 +6.3 38.28 perf-profile.calltrace.cycles-pp.do_vmi_align_munmap.__do_sys_brk.do_syscall_64.entry_SYSCALL_64_after_hwframe.brk
> > 0.00 +6.4 6.35 perf-profile.calltrace.cycles-pp.mas_wr_node_store.mas_wr_store_entry.mas_store_gfp.do_vmi_align_munmap.__do_sys_brk
> > 0.82 +6.7 7.53 perf-profile.calltrace.cycles-pp.mas_wr_store_entry.mas_store_gfp.do_vmi_align_munmap.__do_sys_brk.do_syscall_64
> > 29.25 -20.1 9.14 perf-profile.children.cycles-pp.mas_store_prealloc
> > 33.60 -18.9 14.67 perf-profile.children.cycles-pp.do_brk_flags
> > 27.84 -17.3 10.50 ± 2% perf-profile.children.cycles-pp._raw_spin_lock_irqsave
> > 27.53 -17.1 10.38 ± 2% perf-profile.children.cycles-pp.native_queued_spin_lock_slowpath
> > 13.75 -13.7 0.00 perf-profile.children.cycles-pp.mas_wr_bnode
> > 13.22 -13.2 0.00 perf-profile.children.cycles-pp.kmem_cache_alloc_bulk
> > 12.52 -12.5 0.00 perf-profile.children.cycles-pp.__kmem_cache_alloc_bulk
> > 15.06 -10.7 4.36 perf-profile.children.cycles-pp.mas_alloc_nodes
> > 15.78 -10.5 5.29 perf-profile.children.cycles-pp.mas_preallocate
> > 10.28 -10.3 0.00 perf-profile.children.cycles-pp.mas_wr_spanning_store
> > 12.34 -9.9 2.40 perf-profile.children.cycles-pp.___slab_alloc
> > 9.30 -9.2 0.09 ± 4% perf-profile.children.cycles-pp.get_partial_node
> > 69.68 -9.1 60.59 perf-profile.children.cycles-pp.__do_sys_brk
> > 8.99 -9.0 0.00 perf-profile.children.cycles-pp.mas_split
> > 27.56 -8.0 19.53 perf-profile.children.cycles-pp.rcu_do_batch
> > 27.59 -8.0 19.56 perf-profile.children.cycles-pp.__do_softirq
> > 27.58 -8.0 19.55 perf-profile.children.cycles-pp.rcu_core
> > 7.37 -7.4 0.00 perf-profile.children.cycles-pp.mas_spanning_rebalance
> > 7.54 -6.5 1.02 perf-profile.children.cycles-pp.mas_destroy
> > 5.92 -5.9 0.00 perf-profile.children.cycles-pp.mas_topiary_replace
> > 12.39 -5.8 6.61 perf-profile.children.cycles-pp.vma_complete
> > 15.46 -5.0 10.49 ± 4% perf-profile.children.cycles-pp.smpboot_thread_fn
> > 15.44 -5.0 10.48 ± 4% perf-profile.children.cycles-pp.run_ksoftirqd
> > 15.47 -5.0 10.50 ± 4% perf-profile.children.cycles-pp.ret_from_fork_asm
> > 15.47 -5.0 10.50 ± 4% perf-profile.children.cycles-pp.ret_from_fork
> > 15.47 -5.0 10.50 ± 4% perf-profile.children.cycles-pp.kthread
> > 8.32 -4.6 3.78 ± 2% perf-profile.children.cycles-pp.__slab_free
> > 74.27 -4.5 69.76 perf-profile.children.cycles-pp.do_syscall_64
> > 15.32 -4.2 11.08 ± 2% perf-profile.children.cycles-pp.__unfreeze_partials
> > 20.53 -3.3 17.27 perf-profile.children.cycles-pp.__split_vma
> > 12.15 ± 2% -3.1 9.09 ± 3% perf-profile.children.cycles-pp.irq_exit_rcu
> > 12.47 ± 2% -3.0 9.42 ± 3% perf-profile.children.cycles-pp.sysvec_apic_timer_interrupt
> > 12.50 ± 2% -3.0 9.46 ± 3% perf-profile.children.cycles-pp.asm_sysvec_apic_timer_interrupt
> > 76.50 -2.3 74.18 perf-profile.children.cycles-pp.entry_SYSCALL_64_after_hwframe
> > 1.91 ± 4% -1.8 0.16 ± 3% perf-profile.children.cycles-pp.get_any_partial
> > 1.09 -0.9 0.14 ± 2% perf-profile.children.cycles-pp.memcpy_orig
> > 1.72 -0.7 1.05 perf-profile.children.cycles-pp.mas_pop_node
> > 1.14 -0.2 0.98 ± 2% perf-profile.children.cycles-pp.mas_prev_slot
> > 1.71 ± 2% -0.1 1.57 ± 4% perf-profile.children.cycles-pp.rcu_cblist_dequeue
> > 1.10 -0.1 0.98 perf-profile.children.cycles-pp.mas_next_slot
> > 0.32 ± 2% -0.1 0.22 ± 3% perf-profile.children.cycles-pp.inc_slabs_node
> > 0.60 ± 2% -0.1 0.52 perf-profile.children.cycles-pp.rcu_segcblist_enqueue
> > 0.48 ± 2% -0.1 0.40 ± 2% perf-profile.children.cycles-pp.rcu_nocb_try_bypass
> > 0.47 ± 2% -0.1 0.40 perf-profile.children.cycles-pp.alloc_pages_mpol
> > 0.38 ± 3% -0.1 0.31 ± 2% perf-profile.children.cycles-pp.get_page_from_freelist
> > 0.18 ± 2% -0.1 0.11 perf-profile.children.cycles-pp.__list_del_entry_valid_or_report
> > 0.44 ± 3% -0.1 0.37 perf-profile.children.cycles-pp.__alloc_pages
> > 0.27 ± 2% -0.1 0.22 ± 4% perf-profile.children.cycles-pp.mt_free_rcu
> > 0.25 ± 3% -0.1 0.20 ± 3% perf-profile.children.cycles-pp.rmqueue
> > 0.20 ± 6% -0.0 0.16 ± 3% perf-profile.children.cycles-pp.__rmqueue_pcplist
> > 0.15 ± 3% -0.0 0.11 ± 5% perf-profile.children.cycles-pp.discard_slab
> > 0.16 ± 4% -0.0 0.12 ± 3% perf-profile.children.cycles-pp.rmqueue_bulk
> > 0.08 ± 5% -0.0 0.06 perf-profile.children.cycles-pp.__list_add_valid_or_report
> > 0.24 ± 2% -0.0 0.22 ± 2% perf-profile.children.cycles-pp.__free_one_page
> > 0.19 ± 2% +0.0 0.21 ± 3% perf-profile.children.cycles-pp.update_process_times
> > 0.44 ± 2% +0.0 0.46 ± 4% perf-profile.children.cycles-pp.setup_object
> > 1.00 +0.0 1.03 perf-profile.children.cycles-pp.shuffle_freelist
> > 0.20 ± 3% +0.0 0.24 ± 4% perf-profile.children.cycles-pp.should_failslab
> > 0.09 ± 4% +0.0 0.14 ± 3% perf-profile.children.cycles-pp.strlen
> > 0.06 +0.0 0.11 ± 4% perf-profile.children.cycles-pp.__kmalloc_node
> > 0.06 ± 8% +0.0 0.10 ± 4% perf-profile.children.cycles-pp.__init_rwsem
> > 0.05 +0.0 0.10 ± 3% perf-profile.children.cycles-pp.__kmem_cache_alloc_node
> > 0.00 +0.1 0.05 perf-profile.children.cycles-pp.memcg_account_kmem
> > 0.00 +0.1 0.05 perf-profile.children.cycles-pp.testcase
> > 0.06 +0.1 0.11 ± 4% perf-profile.children.cycles-pp.memcg_alloc_slab_cgroups
> > 0.05 ± 7% +0.1 0.10 ± 4% perf-profile.children.cycles-pp.__pte_offset_map
> > 0.00 +0.1 0.05 ± 8% perf-profile.children.cycles-pp.flush_tlb_batched_pending
> > 0.00 +0.1 0.06 ± 8% perf-profile.children.cycles-pp.__free_slab
> > 0.02 ±141% +0.1 0.08 ± 18% perf-profile.children.cycles-pp.machine__process_mmap2_event
> > 0.07 ± 13% +0.1 0.13 ± 5% perf-profile.children.cycles-pp.may_expand_vm
> > 0.05 ± 50% +0.1 0.11 ± 18% perf-profile.children.cycles-pp.perf_session__process_user_event
> > 0.05 ± 50% +0.1 0.11 ± 18% perf-profile.children.cycles-pp.__ordered_events__flush
> > 0.00 +0.1 0.06 ± 6% perf-profile.children.cycles-pp.memset_orig
> > 0.12 ± 3% +0.1 0.18 ± 2% perf-profile.children.cycles-pp.anon_vma_clone
> > 0.08 ± 4% +0.1 0.14 ± 3% perf-profile.children.cycles-pp.vma_dup_policy
> > 0.07 ± 6% +0.1 0.14 ± 2% perf-profile.children.cycles-pp.free_pgd_range
> > 0.03 ±100% +0.1 0.10 ± 20% perf-profile.children.cycles-pp.perf_session__deliver_event
> > 0.00 +0.1 0.06 ± 7% perf-profile.children.cycles-pp.mas_prev
> > 0.11 ± 3% +0.1 0.18 ± 2% perf-profile.children.cycles-pp.mas_node_count_gfp
> > 0.01 ±223% +0.1 0.08 perf-profile.children.cycles-pp.tlb_batch_pages_flush
> > 0.11 ± 6% +0.1 0.18 ± 2% perf-profile.children.cycles-pp.unmap_single_vma
> > 1.17 +0.1 1.24 ± 2% perf-profile.children.cycles-pp.mtree_range_walk
> > 0.09 ± 5% +0.1 0.17 ± 2% perf-profile.children.cycles-pp.up_read
> > 0.02 ±141% +0.1 0.10 ± 6% perf-profile.children.cycles-pp.vma_prepare
> > 0.06 ± 6% +0.1 0.14 ± 3% perf-profile.children.cycles-pp.can_vma_merge_after
> > 0.10 ± 10% +0.1 0.19 ± 6% perf-profile.children.cycles-pp.kfree
> > 0.08 ± 6% +0.1 0.16 ± 3% perf-profile.children.cycles-pp.strnlen
> > 0.10 ± 4% +0.1 0.20 ± 2% perf-profile.children.cycles-pp.lru_add_drain_cpu
> > 0.18 ± 2% +0.1 0.27 perf-profile.children.cycles-pp.tlb_gather_mmu
> > 0.09 +0.1 0.19 ± 2% perf-profile.children.cycles-pp.refill_obj_stock
> > 0.00 +0.1 0.10 ± 4% perf-profile.children.cycles-pp.mlock_drain_local
> > 0.10 ± 5% +0.1 0.20 ± 2% perf-profile.children.cycles-pp.unlink_anon_vmas
> > 0.11 ± 4% +0.1 0.21 ± 3% perf-profile.children.cycles-pp.khugepaged_enter_vma
> > 0.10 ± 5% +0.1 0.20 perf-profile.children.cycles-pp.current_obj_cgroup
> > 0.10 ± 6% +0.1 0.20 ± 2% perf-profile.children.cycles-pp.syscall_exit_to_user_mode_prepare
> > 0.12 ± 5% +0.1 0.23 ± 3% perf-profile.children.cycles-pp._raw_spin_lock
> > 0.14 ± 4% +0.1 0.26 perf-profile.children.cycles-pp.cap_mmap_addr
> > 0.15 ± 6% +0.1 0.27 perf-profile.children.cycles-pp.exit_to_user_mode_prepare
> > 0.10 ± 3% +0.1 0.23 perf-profile.children.cycles-pp.downgrade_write
> > 0.14 ± 3% +0.1 0.28 perf-profile.children.cycles-pp.remove_vma
> > 2.56 +0.1 2.70 perf-profile.children.cycles-pp.kmem_cache_free
> > 0.00 +0.1 0.14 ± 2% perf-profile.children.cycles-pp.mas_is_err
> > 0.14 ± 3% +0.1 0.28 perf-profile.children.cycles-pp.lru_add_drain
> > 0.08 ± 5% +0.1 0.22 ± 2% perf-profile.children.cycles-pp.__vm_enough_memory
> > 0.15 ± 3% +0.1 0.30 ± 2% perf-profile.children.cycles-pp.__x64_sys_brk
> > 0.15 ± 3% +0.1 0.30 ± 2% perf-profile.children.cycles-pp.vma_adjust_trans_huge
> > 0.22 ± 2% +0.2 0.38 ± 3% perf-profile.children.cycles-pp.rcu_all_qs
> > 0.06 +0.2 0.24 ± 2% perf-profile.children.cycles-pp.mas_prev_range
> > 0.16 ± 4% +0.2 0.35 perf-profile.children.cycles-pp.mas_wr_store_setup
> > 0.24 ± 3% +0.2 0.42 perf-profile.children.cycles-pp.tlb_finish_mmu
> > 0.22 ± 3% +0.2 0.41 perf-profile.children.cycles-pp.security_mmap_addr
> > 0.20 ± 3% +0.2 0.39 ± 2% perf-profile.children.cycles-pp.cap_vm_enough_memory
> > 0.17 ± 5% +0.2 0.36 ± 2% perf-profile.children.cycles-pp.percpu_counter_add_batch
> > 0.14 ± 6% +0.2 0.34 ± 2% perf-profile.children.cycles-pp.strscpy
> > 0.01 ±223% +0.2 0.24 perf-profile.children.cycles-pp.mas_wr_append
> > 0.19 ± 4% +0.2 0.43 ± 2% perf-profile.children.cycles-pp.mas_nomem
> > 0.25 +0.2 0.50 ± 2% perf-profile.children.cycles-pp.security_vm_enough_memory_mm
> > 0.26 +0.3 0.51 ± 2% perf-profile.children.cycles-pp.entry_SYSRETQ_unsafe_stack
> > 0.27 ± 2% +0.3 0.53 ± 2% perf-profile.children.cycles-pp.__pte_offset_map_lock
> > 0.27 ± 2% +0.3 0.56 perf-profile.children.cycles-pp.arch_get_unmapped_area_topdown
> > 0.35 ± 2% +0.3 0.68 perf-profile.children.cycles-pp.obj_cgroup_charge
> > 0.36 ± 2% +0.4 0.72 ± 2% perf-profile.children.cycles-pp.mod_objcg_state
> > 0.39 ± 3% +0.4 0.78 perf-profile.children.cycles-pp.up_write
> > 0.44 ± 2% +0.4 0.85 ± 2% perf-profile.children.cycles-pp.free_pgtables
> > 0.35 +0.4 0.77 perf-profile.children.cycles-pp.userfaultfd_unmap_complete
> > 0.38 ± 2% +0.4 0.81 perf-profile.children.cycles-pp.down_write_killable
> > 0.56 +0.4 1.01 ± 2% perf-profile.children.cycles-pp.down_write
> > 0.53 ± 2% +0.5 1.00 perf-profile.children.cycles-pp.zap_pte_range
> > 0.31 ± 2% +0.5 0.82 perf-profile.children.cycles-pp.mas_wr_end_piv
> > 0.56 +0.5 1.10 perf-profile.children.cycles-pp.mas_leaf_max_gap
> > 0.89 +0.6 1.45 perf-profile.children.cycles-pp.__cond_resched
> > 0.64 ± 2% +0.6 1.20 perf-profile.children.cycles-pp.get_unmapped_area
> > 0.72 ± 2% +0.6 1.32 ± 4% perf-profile.children.cycles-pp.syscall_enter_from_user_mode
> > 0.48 ± 2% +0.6 1.08 perf-profile.children.cycles-pp.entry_SYSCALL_64_safe_stack
> > 0.73 ± 2% +0.6 1.37 perf-profile.children.cycles-pp.check_brk_limits
> > 0.77 ± 2% +0.7 1.50 perf-profile.children.cycles-pp.zap_pmd_range
> > 0.94 +0.8 1.77 perf-profile.children.cycles-pp.memcg_slab_post_alloc_hook
> > 0.68 +0.8 1.52 perf-profile.children.cycles-pp.mas_wr_walk
> > 0.00 +0.9 0.90 perf-profile.children.cycles-pp.mas_wr_slot_store
> > 1.22 +0.9 2.17 perf-profile.children.cycles-pp.vm_area_free_rcu_cb
> > 1.14 ± 2% +1.1 2.20 perf-profile.children.cycles-pp.perf_event_mmap_output
> > 0.91 +1.1 2.02 perf-profile.children.cycles-pp.mas_walk
> > 1.32 +1.2 2.54 perf-profile.children.cycles-pp.unmap_page_range
> > 3.44 +1.3 4.69 perf-profile.children.cycles-pp.__call_rcu_common
> > 0.33 ± 4% +1.4 1.74 perf-profile.children.cycles-pp.mas_update_gap
> > 1.63 +1.5 3.10 perf-profile.children.cycles-pp.perf_iterate_sb
> > 1.79 +1.5 3.30 perf-profile.children.cycles-pp.unmap_vmas
> > 1.60 +1.6 3.19 perf-profile.children.cycles-pp.mas_find
> > 1.85 +1.9 3.73 perf-profile.children.cycles-pp.__entry_text_start
> > 2.39 +2.2 4.60 perf-profile.children.cycles-pp.perf_event_mmap_event
> > 2.62 +2.5 5.12 perf-profile.children.cycles-pp.perf_event_mmap
> > 3.15 +2.6 5.79 perf-profile.children.cycles-pp.unmap_region
> > 2.75 +2.8 5.55 perf-profile.children.cycles-pp.vm_area_dup
> > 3.46 +3.6 7.04 perf-profile.children.cycles-pp.syscall_exit_to_user_mode
> > 3.94 +3.9 7.80 perf-profile.children.cycles-pp.syscall_return_via_sysret
> > 4.68 +4.3 9.03 perf-profile.children.cycles-pp.mas_store_gfp
> > 3.74 +4.7 8.40 perf-profile.children.cycles-pp.kmem_cache_alloc
> > 83.90 +4.9 88.80 perf-profile.children.cycles-pp.brk
> > 32.12 +6.4 38.51 perf-profile.children.cycles-pp.do_vmi_align_munmap
> > 0.24 ± 2% +11.0 11.20 perf-profile.children.cycles-pp.mas_wr_node_store
> > 1.38 +13.6 14.95 perf-profile.children.cycles-pp.mas_wr_store_entry
> > 27.53 -17.1 10.38 ± 2% perf-profile.self.cycles-pp.native_queued_spin_lock_slowpath
> > 4.60 -0.8 3.76 ± 2% perf-profile.self.cycles-pp.__slab_free
> > 0.94 -0.8 0.12 ± 4% perf-profile.self.cycles-pp.memcpy_orig
> > 1.52 -0.6 0.94 perf-profile.self.cycles-pp.mas_pop_node
> > 0.79 -0.5 0.30 perf-profile.self.cycles-pp.___slab_alloc
> > 0.31 -0.2 0.12 ± 3% perf-profile.self.cycles-pp._raw_spin_lock_irqsave
> > 0.28 ± 3% -0.2 0.09 ± 5% perf-profile.self.cycles-pp.__unfreeze_partials
> > 1.68 ± 2% -0.1 1.55 ± 5% perf-profile.self.cycles-pp.rcu_cblist_dequeue
> > 2.14 -0.1 2.02 perf-profile.self.cycles-pp.kmem_cache_free
> > 0.37 ± 2% -0.1 0.28 perf-profile.self.cycles-pp.rcu_nocb_try_bypass
> > 0.30 ± 2% -0.1 0.22 ± 3% perf-profile.self.cycles-pp.inc_slabs_node
> > 0.52 ± 2% -0.1 0.46 ± 2% perf-profile.self.cycles-pp.rcu_segcblist_enqueue
> > 0.17 ± 2% -0.1 0.10 ± 4% perf-profile.self.cycles-pp.__list_del_entry_valid_or_report
> > 0.26 -0.0 0.21 ± 4% perf-profile.self.cycles-pp.mt_free_rcu
> > 0.15 ± 3% -0.0 0.11 ± 3% perf-profile.self.cycles-pp.discard_slab
> > 0.17 ± 2% -0.0 0.14 ± 2% perf-profile.self.cycles-pp.get_any_partial
> > 0.08 ± 5% -0.0 0.06 perf-profile.self.cycles-pp.__list_add_valid_or_report
> > 0.15 ± 3% -0.0 0.13 ± 3% perf-profile.self.cycles-pp.__free_one_page
> > 0.10 ± 3% +0.0 0.12 ± 4% perf-profile.self.cycles-pp.rcu_segcblist_pend_cbs
> > 0.08 ± 10% +0.0 0.10 ± 4% perf-profile.self.cycles-pp.should_failslab
> > 0.08 +0.0 0.12 ± 3% perf-profile.self.cycles-pp.strlen
> > 0.06 +0.0 0.10 ± 6% perf-profile.self.cycles-pp.vma_dup_policy
> > 0.08 +0.0 0.12 ± 3% perf-profile.self.cycles-pp.anon_vma_clone
> > 0.06 ± 9% +0.0 0.10 ± 6% perf-profile.self.cycles-pp.may_expand_vm
> > 0.00 +0.1 0.05 perf-profile.self.cycles-pp.mas_prev
> > 0.03 ± 70% +0.1 0.08 ± 5% perf-profile.self.cycles-pp.__init_rwsem
> > 0.09 ± 8% +0.1 0.14 ± 4% perf-profile.self.cycles-pp.kfree
> > 0.00 +0.1 0.06 ± 6% perf-profile.self.cycles-pp.__vm_enough_memory
> > 0.07 ± 6% +0.1 0.13 ± 2% perf-profile.self.cycles-pp.mas_node_count_gfp
> > 0.03 ± 70% +0.1 0.09 ± 7% perf-profile.self.cycles-pp.security_vm_enough_memory_mm
> > 0.15 ± 3% +0.1 0.21 ± 11% perf-profile.self.cycles-pp.setup_object
> > 0.00 +0.1 0.06 perf-profile.self.cycles-pp.memset_orig
> > 0.07 ± 5% +0.1 0.13 ± 3% perf-profile.self.cycles-pp.security_mmap_addr
> > 0.00 +0.1 0.06 ± 6% perf-profile.self.cycles-pp.tlb_batch_pages_flush
> > 0.06 ± 7% +0.1 0.13 ± 3% perf-profile.self.cycles-pp.free_pgd_range
> > 0.08 +0.1 0.15 ± 2% perf-profile.self.cycles-pp.check_brk_limits
> > 0.08 ± 6% +0.1 0.14 ± 3% perf-profile.self.cycles-pp.khugepaged_enter_vma
> > 0.09 ± 4% +0.1 0.17 ± 2% perf-profile.self.cycles-pp.unmap_single_vma
> > 0.00 +0.1 0.08 ± 6% perf-profile.self.cycles-pp.vma_prepare
> > 0.07 ± 5% +0.1 0.15 ± 4% perf-profile.self.cycles-pp.up_read
> > 0.06 ± 7% +0.1 0.14 ± 5% perf-profile.self.cycles-pp.strnlen
> > 0.16 ± 2% +0.1 0.24 perf-profile.self.cycles-pp.tlb_gather_mmu
> > 0.07 +0.1 0.15 ± 3% perf-profile.self.cycles-pp.unlink_anon_vmas
> > 0.09 ± 6% +0.1 0.17 perf-profile.self.cycles-pp.lru_add_drain_cpu
> > 0.00 +0.1 0.08 perf-profile.self.cycles-pp.mlock_drain_local
> > 0.04 ± 44% +0.1 0.12 ± 3% perf-profile.self.cycles-pp.can_vma_merge_after
> > 0.14 ± 2% +0.1 0.22 ± 3% perf-profile.self.cycles-pp.get_unmapped_area
> > 0.01 ±223% +0.1 0.09 ± 5% perf-profile.self.cycles-pp.__pte_offset_map
> > 0.06 ± 7% +0.1 0.15 ± 3% perf-profile.self.cycles-pp.remove_vma
> > 0.08 ± 4% +0.1 0.17 ± 3% perf-profile.self.cycles-pp.syscall_exit_to_user_mode_prepare
> > 0.09 +0.1 0.18 ± 3% perf-profile.self.cycles-pp.refill_obj_stock
> > 0.08 ± 4% +0.1 0.17 ± 3% perf-profile.self.cycles-pp.current_obj_cgroup
> > 0.09 ± 4% +0.1 0.18 ± 2% perf-profile.self.cycles-pp.__pte_offset_map_lock
> > 0.00 +0.1 0.10 ± 4% perf-profile.self.cycles-pp.mas_is_err
> > 0.09 ± 6% +0.1 0.19 ± 3% perf-profile.self.cycles-pp.mas_nomem
> > 0.11 ± 4% +0.1 0.21 ± 4% perf-profile.self.cycles-pp._raw_spin_lock
> > 0.24 ± 2% +0.1 0.35 perf-profile.self.cycles-pp.mas_destroy
> > 0.12 ± 3% +0.1 0.23 ± 2% perf-profile.self.cycles-pp.cap_mmap_addr
> > 1.02 +0.1 1.13 perf-profile.self.cycles-pp.mtree_range_walk
> > 0.15 ± 4% +0.1 0.26 ± 4% perf-profile.self.cycles-pp.rcu_all_qs
> > 0.12 ± 6% +0.1 0.22 ± 2% perf-profile.self.cycles-pp.exit_to_user_mode_prepare
> > 0.09 +0.1 0.20 ± 2% perf-profile.self.cycles-pp.downgrade_write
> > 0.13 +0.1 0.25 ± 2% perf-profile.self.cycles-pp.__x64_sys_brk
> > 0.22 ± 2% +0.1 0.34 ± 2% perf-profile.self.cycles-pp.unmap_vmas
> > 0.13 ± 3% +0.1 0.26 ± 2% perf-profile.self.cycles-pp.vma_adjust_trans_huge
> > 0.12 ± 4% +0.1 0.25 ± 2% perf-profile.self.cycles-pp.entry_SYSCALL_64_safe_stack
> > 0.16 ± 3% +0.1 0.30 perf-profile.self.cycles-pp.tlb_finish_mmu
> > 0.12 ± 4% +0.1 0.26 ± 2% perf-profile.self.cycles-pp.mas_wr_store_setup
> > 0.14 ± 4% +0.2 0.29 ± 2% perf-profile.self.cycles-pp.syscall_enter_from_user_mode
> > 0.14 ± 2% +0.2 0.31 perf-profile.self.cycles-pp.free_pgtables
> > 0.12 ± 4% +0.2 0.28 perf-profile.self.cycles-pp.strscpy
> > 0.00 +0.2 0.17 ± 4% perf-profile.self.cycles-pp.mas_prev_range
> > 0.14 ± 4% +0.2 0.31 ± 2% perf-profile.self.cycles-pp.percpu_counter_add_batch
> > 0.18 ± 2% +0.2 0.35 perf-profile.self.cycles-pp.cap_vm_enough_memory
> > 0.18 ± 3% +0.2 0.36 ± 2% perf-profile.self.cycles-pp.zap_pte_range
> > 0.15 ± 3% +0.2 0.33 ± 2% perf-profile.self.cycles-pp.zap_pmd_range
> > 0.27 +0.2 0.47 perf-profile.self.cycles-pp.unmap_region
> > 0.00 +0.2 0.20 ± 2% perf-profile.self.cycles-pp.mas_wr_append
> > 0.00 +0.2 0.20 ± 3% perf-profile.self.cycles-pp.mas_wr_slot_store
> > 0.18 ± 2% +0.2 0.39 perf-profile.self.cycles-pp.vma_complete
> > 0.34 ± 5% +0.2 0.55 ± 3% perf-profile.self.cycles-pp.vm_area_free_rcu_cb
> > 0.22 ± 2% +0.2 0.44 ± 2% perf-profile.self.cycles-pp.entry_SYSRETQ_unsafe_stack
> > 0.45 ± 2% +0.2 0.68 perf-profile.self.cycles-pp.mas_alloc_nodes
> > 0.20 ± 2% +0.2 0.43 ± 2% perf-profile.self.cycles-pp.down_write_killable
> > 0.20 ± 3% +0.2 0.44 perf-profile.self.cycles-pp.perf_event_mmap
> > 0.18 ± 3% +0.2 0.42 ± 2% perf-profile.self.cycles-pp.do_syscall_64
> > 0.24 +0.3 0.49 perf-profile.self.cycles-pp.arch_get_unmapped_area_topdown
> > 0.27 ± 3% +0.3 0.54 perf-profile.self.cycles-pp.obj_cgroup_charge
> > 0.36 ± 2% +0.3 0.66 ± 3% perf-profile.self.cycles-pp.down_write
> > 0.30 ± 2% +0.3 0.62 perf-profile.self.cycles-pp.vm_area_dup
> > 0.32 ± 2% +0.3 0.64 ± 2% perf-profile.self.cycles-pp.mod_objcg_state
> > 0.35 +0.3 0.68 perf-profile.self.cycles-pp.mas_walk
> > 0.34 ± 2% +0.3 0.68 perf-profile.self.cycles-pp.perf_event_mmap_event
> > 0.33 ± 2% +0.4 0.68 perf-profile.self.cycles-pp.up_write
> > 0.44 ± 2% +0.4 0.80 perf-profile.self.cycles-pp.perf_iterate_sb
> > 0.58 +0.4 0.94 ± 2% perf-profile.self.cycles-pp.__cond_resched
> > 0.30 ± 2% +0.4 0.68 perf-profile.self.cycles-pp.userfaultfd_unmap_complete
> > 0.51 +0.4 0.88 perf-profile.self.cycles-pp.mas_next_slot
> > 0.44 ± 2% +0.4 0.82 perf-profile.self.cycles-pp.unmap_page_range
> > 0.58 +0.4 0.96 perf-profile.self.cycles-pp.mas_find
> > 0.26 +0.4 0.68 perf-profile.self.cycles-pp.mas_wr_end_piv
> > 0.48 ± 2% +0.4 0.90 perf-profile.self.cycles-pp.brk
> > 0.45 +0.4 0.88 perf-profile.self.cycles-pp.mas_prev_slot
> > 0.49 +0.4 0.94 perf-profile.self.cycles-pp.mas_leaf_max_gap
> > 0.34 ± 2% +0.4 0.78 perf-profile.self.cycles-pp.mas_store_prealloc
> > 0.20 ± 3% +0.4 0.65 ± 2% perf-profile.self.cycles-pp.mas_update_gap
> > 0.41 ± 2% +0.5 0.92 perf-profile.self.cycles-pp.mas_store_gfp
> > 0.64 +0.6 1.23 perf-profile.self.cycles-pp.memcg_slab_post_alloc_hook
> > 0.59 ± 2% +0.6 1.22 perf-profile.self.cycles-pp.__split_vma
> > 0.44 ± 2% +0.7 1.10 perf-profile.self.cycles-pp.mas_wr_store_entry
> > 0.66 +0.7 1.35 perf-profile.self.cycles-pp.mas_preallocate
> > 0.59 +0.7 1.33 perf-profile.self.cycles-pp.do_brk_flags
> > 0.58 +0.7 1.32 perf-profile.self.cycles-pp.mas_wr_walk
> > 1.03 +0.8 1.81 perf-profile.self.cycles-pp.do_vmi_align_munmap
> > 0.78 +0.8 1.57 perf-profile.self.cycles-pp.__do_sys_brk
> > 1.79 +0.9 2.66 perf-profile.self.cycles-pp.__call_rcu_common
> > 1.02 +1.0 1.98 perf-profile.self.cycles-pp.perf_event_mmap_output
> > 1.33 +1.4 2.74 perf-profile.self.cycles-pp.kmem_cache_alloc
> > 1.64 +1.7 3.30 perf-profile.self.cycles-pp.__entry_text_start
> > 2.26 +2.2 4.50 perf-profile.self.cycles-pp.entry_SYSCALL_64_after_hwframe
> > 3.23 +3.3 6.58 perf-profile.self.cycles-pp.syscall_exit_to_user_mode
> > 0.21 ± 2% +3.6 3.82 perf-profile.self.cycles-pp.mas_wr_node_store
> > 3.93 +3.9 7.78 perf-profile.self.cycles-pp.syscall_return_via_sysret
> >
> >
> >
> >
> > Disclaimer:
> > Results have been estimated based on internal Intel analysis and are provided
> > for informational purposes only. Any difference in system hardware or software
> > design or configuration may affect actual performance.
> >
> >