LinuxLists.cc - [btrfs] e86bb85b1f: stress-ng.utime.ops_per

2021-01-12 15:12:47

Subject: [btrfs] e86bb85b1f: stress-ng.utime.ops_per_sec -70.1% regression

Greeting,

FYI, we noticed a

commit: e86bb85b1fec48bcb8 url: in testcase: stress-ng
on test machine: with following parameters:

nr_threads: 10%
disk: 1HDD
testtime: 30s
class: filesystem
cpufreq_governor: performance
ucode: 0x5003003
fs: btrfs

If you fix the issue, Reported-by: kernel

Details are as below:
--------------------------

To reproduce:

git clone bin/lkp install job.yaml bin/lkp run job.yaml

========================== class/compiler/cpufreq_gov filesystem/gcc-9/perform
commit:
97847e0652 ("Merge e86bb85b1f ("btrfs:
97847e06525b51ea ---------------- %stddev %change \ | 1098218 36607 -40.4% 92962 ? 2% -44.1% 3098 ? 2% -44.1% 936128 ? 6% 31204 ? 6% -41.0% 1939514 64650 -18.5% 44283608 3705607 ? 2% 123519 ? 2% -70.1% 381.20 ? 6% 6316 ? 57% -79.8% 10488 ?101% -89.5% 5605 ? 92% 6094 ?128% 4921 ? 9% +20.5% 4922 ? 9% +20.5% 9818 ? 5% -6.9% 49223 ? 3% -18.4% 903.25 ? 3% 50620 ? 3% -18.0% 903.25 ? 3% 9927 ? 3% 6043459 ? 2% 1125 -6.1% 20361 ? 2% 66221 9927 ? 3% 1225 -5.8% 11313111 0.00 +125.0% 0.01 ? 13% -24.5% 3.26 ? 41% -98.8% 0.00 ? 50% +123.5% 4.77 ? 6% -25.7% 0.02 ? 7% +19.5% 1711 ? 27% +60.7% 0.03 ?132% +2497.6% 0.25 ? 67% +243.4% 0.02 ? 11% +28.6% 0.27 ?160% +1248.5% 0.04 ?165% +4851.4% 36969238 2.009e+09 12297175 ? 2% 1843 +7.0% 8936 -2.2% 952962 5348157 8942 -2.2% 0.00 ? 20% +0.0 1263 +6.1% 36924576 2.003e+09 12274047 ? 2% 8880 -2.1% 950813 5343222 8887 -2.1% 57.00 ?166% -100.0% 19339 ? 7% +31.3% 19917 ? 5% 20940 ? 5% 3470 ? 65% 3470 ? 65% 2061 ?160% 2061 ?160% 3041 ? 47% +75.6% 3748 ? 96% 3748 ? 96% 21172 ? 5% -12.7% 56.25 ?169% -100.0% 122.50 ? 25% -34.5% 122.50 ? 25% -34.5% 21585 ? 5% +13.4% 3340 ? 22% +76.3% 23969 ? 5% +12.5% 22832 ? 5% +26.5% 2329 ?106% 2329 ?106% 3520 ? 65% 3520 ? 65% 1570 ?156% 1570 ?156% 2501 ?109% 2501 ?109% 5208 ? 44% -48.6% 20273 ? 10% +22.3% 1833 ?158% 1833 ?158% 47.69 ? 11% -27.3 20.56 ? 11% -12.1 18.78 ? 11% -11.9 5.42 ? 12% -3.8 5.38 ? 12% -3.8 5.36 ? 12% -3.8 5.32 ? 11% -3.1 5.17 ? 11% -2.4 4.77 ? 8% -2.3 3.79 ? 7% -2.0 3.54 ? 12% -1.8 3.49 ? 9% -1.8 2.49 ? 9% -1.4 3.38 ? 11% -1.3 3.25 ? 11% -1.3 2.99 ? 11% -1.2 1.55 ? 11% -1.2 2.89 ? 10% -1.1 2.46 ? 7% -1.1 1.79 ? 11% -0.7 1.57 ? 11% -0.7 1.64 ? 9% -0.6 1.60 ? 9% -0.6 1.54 ? 8% -0.6 1.21 ? 10% -0.4 1.00 ? 10% -0.4 0.95 ? 14% -0.4 0.95 ? 7% -0.3 0.91 ? 10% -0.3 0.00 +1.0 0.00 +1.6 0.00 +4.2 0.00 +12.6 0.00 +13.0 0.00 +15.3 0.00 +15.8 0.00 +16.0 0.00 +16.0 0.63 ? 10% +16.7 0.00 +18.3 0.00 +18.4 2.18 ? 12% +18.4 0.00 +18.9 9.24 ? 10% +32.2 9.16 ? 10% +32.2 8.30 ? 9% +32.6 8.09 ? 10% +32.7 7.74 ? 9% +32.8 47.72 ? 11% -27.3 20.57 ? 11% -12.1 18.81 ? 11% -11.9 5.42 ? 12% -3.8 5.39 ? 12% -3.8 5.36 ? 12% -3.8 5.34 ? 11% -3.1 5.18 ? 11% -2.4 4.77 ? 8% -2.3 3.80 ? 7% -2.0 3.54 ? 12% -1.8 3.49 ? 9% -1.8 4.39 ? 11% -1.7 3.93 ? 11% -1.5 2.50 ? 9% -1.4 3.26 ? 11% -1.3 2.90 ? 10% -1.1 2.47 ? 7% -1.1 1.55 ? 11% -1.1 2.37 ? 11% -0.9 2.11 ? 10% -0.9 2.13 ? 9% -0.8 2.08 ? 9% -0.8 1.17 ? 12% -0.7 1.58 ? 14% -0.7 1.10 ? 12% -0.6 1.58 ? 9% -0.6 1.56 ? 11% -0.6 1.29 ? 14% -0.5 1.10 ? 13% -0.5 0.59 ? 10% -0.4 0.57 ? 10% -0.4 0.83 ? 13% -0.4 0.91 ? 10% -0.4 0.96 ? 7% -0.4 0.60 ? 14% -0.3 0.65 ? 10% -0.3 0.64 ? 10% -0.3 0.77 ? 12% -0.3 0.69 ? 5% -0.3 0.65 ? 12% -0.3 0.70 ? 9% -0.3 0.62 ? 12% -0.3 0.51 ? 12% -0.3 0.46 ? 31% -0.2 0.59 ? 12% -0.2 0.48 ? 11% -0.2 0.58 ? 10% -0.2 0.52 ? 10% -0.2 0.47 ? 20% -0.2 0.33 ? 12% -0.2 0.46 ? 12% -0.2 0.32 ? 12% -0.2 0.31 ? 12% -0.2 0.32 ? 12% -0.2 0.45 ? 9% -0.2 0.28 ? 63% -0.2 0.35 ? 28% -0.1 0.42 ? 10% -0.1 0.36 ? 10% -0.1 0.35 ? 10% -0.1 0.35 ? 9% -0.1 0.32 ? 10% -0.1 0.36 ? 14% -0.1 0.35 ? 11% -0.1 0.32 ? 9% -0.1 0.27 ? 10% -0.1 0.26 ? 7% -0.1 0.23 ? 15% -0.1 0.19 ? 39% -0.1 0.23 ? 14% -0.1 0.23 ? 14% -0.1 0.18 ? 14% -0.1 0.17 ? 15% -0.1 0.18 ? 13% -0.1 0.19 ? 14% -0.1 0.20 ? 10% -0.1 0.19 ? 16% -0.1 0.15 ? 14% -0.1 0.17 ? 11% -0.1 0.17 ? 17% -0.1 0.16 ? 7% -0.1 0.10 ? 21% -0.1 0.11 ? 9% -0.0 0.11 ? 18% -0.0 0.11 ? 16% -0.0 0.10 -0.0 0.11 ? 13% -0.0 0.12 ? 12% -0.0 0.10 ? 19% -0.0 0.11 ? 14% -0.0 0.09 ? 14% -0.0 0.10 ? 14% -0.0 0.08 ? 10% -0.0 0.21 ? 6% +0.1 0.05 ? 61% +0.1 0.00 +0.2 0.06 ? 17% +0.3 0.00 +0.4 0.00 +0.5 0.00 +0.5 0.00 +0.5 0.00 +1.0 0.00 +1.8 0.00 +4.2 0.00 +16.0 0.00 +16.0 0.64 ? 9% +16.7 0.00 +18.3 0.00 +18.4 2.19 ? 12% +18.4 0.00 +18.9 0.75 ? 8% +27.1 2.32 ? 10% +28.3 9.25 ? 10% +32.2 9.16 ? 10% +32.2 8.31 ? 9% +32.6 8.10 ? 10% +32.7 7.75 ? 9% +32.8 13.73 ? 11% -8.9 5.33 ? 12% -3.8 4.57 ? 11% -3.1 5.30 ? 11% -3.1 3.53 ? 12% -1.8 2.48 ? 9% -1.4 1.10 ? 12% -0.6 1.04 ? 14% -0.5 0.57 ? 11% -0.4 1.06 ? 9% -0.4 1.02 ? 10% -0.4 0.93 ? 14% -0.4 0.79 ? 8% -0.3 0.69 ? 5% -0.3 0.72 ? 11% -0.3 0.65 ? 12% -0.3 0.46 ? 31% -0.2 0.64 ? 9% -0.2 0.60 ? 9% -0.2 0.41 ? 11% -0.2 0.45 ? 10% -0.2 0.30 ? 13% -0.2 0.44 ? 20% -0.2 0.42 ? 11% -0.2 0.42 ? 8% -0.2 0.47 ? 10% -0.2 0.27 ? 65% -0.2 0.36 ? 14% -0.1 0.34 ? 10% -0.1 0.38 ? 11% -0.1 0.32 ? 19% -0.1 0.34 ? 13% -0.1 0.31 ? 9% -0.1 0.27 ? 10% -0.1 0.28 ? 11% -0.1 0.25 ? 8% -0.1 0.26 ? 8% -0.1 0.23 ? 16% -0.1 0.17 ? 16% -0.1 0.22 ? 15% -0.1 0.20 ? 13% -0.1 0.14 ? 18% -0.1 0.21 ? 13% -0.1 0.17 ? 11% -0.1 0.17 ? 17% -0.1 0.19 ? 14% -0.1 0.20 ? 10% -0.1 0.16 ? 10% -0.1 0.15 ? 14% -0.1 0.20 ? 10% -0.1 0.15 ? 14% -0.1 0.17 ? 9% -0.1 0.14 ? 12% -0.1 0.07 ? 11% -0.0 0.11 ? 16% -0.0 0.15 ? 15% -0.0 0.12 ? 12% -0.0 0.11 ? 11% -0.0 0.11 ? 13% -0.0 0.10 ? 5% -0.0 0.10 ? 19% -0.0 0.11 ? 14% -0.0 0.10 ? 14% -0.0 0.10 ? 21% -0.0 0.07 ? 11% -0.0 0.09 ? 20% -0.0 0.07 ? 12% -0.0 0.21 ? 6% +0.1 0.05 ? 62% +0.1 0.00 +0.1 0.00 +0.1 0.00 +0.2 0.00 +0.2 0.46 ? 15% +0.2 0.00 +0.2 0.06 ? 20% +0.3 0.00 +0.6 0.00 +0.6 0.36 ? 12% +0.6 0.00 +1.0 1.57 ? 11% +1.2 0.00 +2.1 0.73 ? 8% +27.1

1.2e+06 +--------------- | +..+..+..+.. 1e+06 |-+ : | : | : 800000 |-+ : | : 600000 |-+O :O O O O O | : 400000 |-+ : | : | : 200000 |-+: | : 0 +--------------- 40000 +----------------- | +..+..+..+... 35000 |-+ : 30000 |-+ : | : 25000 |-+ : | : 20000 |-+O :O O O O O | : 15000 |-+ : 10000 |-+ : | : 5000 |-+: | : 0 +----------------- 140000 +---------------- | +.. 120000 |-+ : | : +.. .. 100000 |-+ : + | : 80000 |-+ : | : 60000 |-+ : | O: O 40000 |-+ : | : 20000 |-+: | : 0 +---------------- 4500 +------------------ | +.. 4000 |-+ : 3500 |-+ : +... + | : + 3000 |-+ : 2500 |-+ : | : 2000 |-+ : 1500 |-+O: O O O O O | : 1000 |-+ : 500 |-+: | : 0 +------------------ 1.2e+06 +--------------- | +..+..+.. .+.. 1e+06 |-+ : | : | : 800000 |-+ : | : 600000 |-+O :O | : O O O O 400000 |-+ : | : | : 200000 |-+: | : 0 +--------------- 40000 +----------------- | +..+..+.. ..+.. 35000 |-+ : 30000 |-+ : | : 25000 |-+ : | : 20000 |-+O :O | : O O O O 15000 |-+ : 10000 |-+ : | : 5000 |-+: | : 0 +----------------- 4.5e+06 +--------------- | 4e+06 |-+ +..+. 3.5e+06 |-+ : | : 3e+06 |-+ : 2.5e+06 |-+ : | : 2e+06 |-+ : 1.5e+06 |-+ : | : 1e+06 |-+O: O O O O O 500000 |-+ : | : 0 +--------------- 160000 +---------------- | .+.. +.. 140000 |-+ .+. +.. .. 120000 |-+ +. | : 100000 |-+ : | : 80000 |-+ : | : 60000 |-+ : 40000 |-+ : | O: O 20000 |-+ : | : 0 +---------------- [*] bisect-good sample
[O] bisect-bad sample

Disclaimer:
Results have been for informational design or configuration

Thanks,
Oliver Sang

-70.1% regression of stress-ng.utime.ops_per_sec due to commit:
dfb79ec9f104d1a38fda78 ("[PATCH] btrfs: make btrfs_dirty_inode() to always reserve metadata space")
hub.com/0day-ci/linux/commits/Qu-Wenruo/btrfs-make-btrfs_dirty_inode-to-always-reserve-metadata-space/20210108-134133">https://github.com/0day-ci/linux/commits/Qu-Wenruo/btrfs-make-btrfs_dirty_inode-to-always-reserve-metadata-space/20210108-134133
t.kernel.org/cgit/linux/kernel/git/kdave/linux.git">https://git.kernel.org/cgit/linux/kernel/git/kdave/linux.git for-next
96 threads Intel(R) Xeon(R) Gold 6252 CPU @ 2.10GHz with 512G memory
kindly add following tag
test robot <[email protected]>
------------------------------------------------------------------------>
href="https://github.com/intel/lkp-tests.git">https://github.com/intel/lkp-tests.git
# job file is attached in this email
===============================================================
ernor/disk/fs/kconfig/nr_threads/rootfs/tbox_group/testcase/testtime/ucode:
ance/1HDD/btrfs/x86_64-rhel-8.3/10%/debian-10.4-x86_64-20200603.cgz/lkp-csl-2sp7/stress-ng/30s/0x5003003
branch 'for-next-next-v5.10-20201211' into for-next-20201211")
make btrfs_dirty_inode() to always reserve metadata space")
e86bb85b1fec48bcb8dfb79ec9f
---------------------------
%stddev
\
-40.4% 654054 stress-ng.access.ops
21801 stress-ng.access.ops_per_sec
51992 ? 3% stress-ng.chmod.ops
1733 ? 3% stress-ng.chmod.ops_per_sec
-41.0% 552284 stress-ng.chown.ops
18409 stress-ng.chown.ops_per_sec
-18.5% 1580533 stress-ng.fcntl.ops
52684 stress-ng.fcntl.ops_per_sec
-2.8% 43055946 stress-ng.time.file_system_outputs
-70.1% 1109769 stress-ng.utime.ops
36992 stress-ng.utime.ops_per_sec
+12.3% 428.27 ? 9% sched_debug.cfs_rq:/.load_avg.avg
1278 ? 68% softirqs.CPU77.BLOCK
1100 ?124% softirqs.CPU78.BLOCK
-82.3% 990.50 ? 32% softirqs.CPU80.BLOCK
-89.9% 614.50 ? 44% softirqs.CPU92.BLOCK
5931 ? 5% slabinfo.dmaengine-unmap-16.active_objs
5933 ? 5% slabinfo.dmaengine-unmap-16.num_objs
9139 ? 3% slabinfo.kmalloc-rcl-256.active_objs
40177 ? 3% slabinfo.radix_tree_node.active_objs
-18.0% 740.50 ? 3% slabinfo.radix_tree_node.active_slabs
41505 ? 3% slabinfo.radix_tree_node.num_objs
-18.0% 740.50 ? 3% slabinfo.radix_tree_node.num_slabs
+5.8% 10504 proc-vmstat.nr_active_anon
-2.2% 5911900 proc-vmstat.nr_dirtied
1056 ? 4% proc-vmstat.nr_dirty
+4.7% 21309 proc-vmstat.nr_shmem
-4.3% 63404 ? 2% proc-vmstat.nr_slab_reclaimable
+5.8% 10504 proc-vmstat.nr_zone_active_anon
1154 ? 3% proc-vmstat.nr_zone_write_pending
-2.1% 11072335 proc-vmstat.pgfault
0.00 ? 19% perf-sched.sch_delay.avg.ms.preempt_schedule_common._cond_resched.kmem_cache_alloc.start_transaction.btrfs_dirty_inode
0.01 ? 15% perf-sched.sch_delay.max.ms.do_wait.kernel_wait4.__do_sys_wait4.do_syscall_64
0.04 perf-sched.sch_delay.max.ms.rwsem_down_write_slowpath.chmod_common.do_fchmodat.__x64_sys_chmod
0.01 ? 24% perf-sched.sch_delay.max.ms.wait_for_partner.fifo_open.do_dentry_open.path_openat
3.54 perf-sched.total_sch_delay.max.ms
0.02 ? 5% perf-sched.wait_and_delay.avg.ms.rwsem_down_write_slowpath.chmod_common.do_fchmodat.__x64_sys_fchmodat
2750 ? 22% perf-sched.wait_and_delay.count.rwsem_down_write_slowpath.chmod_common.__x64_sys_fchmod.do_syscall_64
0.81 ? 66% perf-sched.wait_time.avg.ms.preempt_schedule_common._cond_resched.dput.path_put.do_fchmodat
0.86 ? 49% perf-sched.wait_time.avg.ms.preempt_schedule_common._cond_resched.kmem_cache_alloc.start_transaction.btrfs_dirty_inode
0.02 ? 13% perf-sched.wait_time.avg.ms.rwsem_down_write_slowpath.chmod_common.do_fchmodat.__x64_sys_chmod
3.67 ? 57% perf-sched.wait_time.max.ms.preempt_schedule_common._cond_resched.dput.path_put.do_fchmodat
2.17 ? 99% perf-sched.wait_time.max.ms.preempt_schedule_common._cond_resched.mnt_want_write.chmod_common.do_fchmodat
-5.8% 34829162 ? 2% perf-stat.i.cache-misses
-2.7% 1.954e+09 perf-stat.i.dTLB-stores
-6.5% 11500340 perf-stat.i.iTLB-load-misses
1972 ? 2% perf-stat.i.instructions-per-iTLB-miss
8740 perf-stat.i.minor-faults
-3.6% 919068 perf-stat.i.node-loads
-7.4% 4950006 ? 2% perf-stat.i.node-store-misses
8748 perf-stat.i.page-faults
0.00 ? 18% perf-stat.overall.dTLB-store-miss-rate%
1339 perf-stat.overall.instructions-per-iTLB-miss
-5.8% 34784593 ? 2% perf-stat.ps.cache-misses
-2.7% 1.949e+09 perf-stat.ps.dTLB-stores
-6.5% 11479296 perf-stat.ps.iTLB-load-misses
8694 perf-stat.ps.minor-faults
-3.6% 916929 perf-stat.ps.node-loads
-7.5% 4944422 ? 2% perf-stat.ps.node-store-misses
8702 perf-stat.ps.page-faults
0.00 interrupts.92:PCI-MSI.31981625-edge.i40e-eth0-TxRx-56
25385 ? 16% interrupts.CPU13.CAL:Function_call_interrupts
+9.7% 21856 interrupts.CPU23.TLB:TLB_shootdowns
+9.5% 22935 ? 4% interrupts.CPU29.CAL:Function_call_interrupts
-96.1% 136.75 ? 5% interrupts.CPU29.NMI:Non-maskable_interrupts
-96.1% 136.75 ? 5% interrupts.CPU29.PMI:Performance_monitoring_interrupts
-93.5% 134.00 ? 3% interrupts.CPU33.NMI:Non-maskable_interrupts
-93.5% 134.00 ? 3% interrupts.CPU33.PMI:Performance_monitoring_interrupts
5342 ? 36% interrupts.CPU35.RES:Rescheduling_interrupts
-96.5% 133.00 ? 5% interrupts.CPU40.NMI:Non-maskable_interrupts
-96.5% 133.00 ? 5% interrupts.CPU40.PMI:Performance_monitoring_interrupts
18476 ? 6% interrupts.CPU45.CAL:Function_call_interrupts
0.00 interrupts.CPU56.92:PCI-MSI.31981625-edge.i40e-eth0-TxRx-56
80.25 ? 32% interrupts.CPU56.NMI:Non-maskable_interrupts
80.25 ? 32% interrupts.CPU56.PMI:Performance_monitoring_interrupts
24479 ? 5% interrupts.CPU58.TLB:TLB_shootdowns
5888 ? 48% interrupts.CPU62.RES:Rescheduling_interrupts
26976 ? 14% interrupts.CPU66.CAL:Function_call_interrupts
28873 ? 14% interrupts.CPU69.CAL:Function_call_interrupts
-66.3% 784.50 ?150% interrupts.CPU73.NMI:Non-maskable_interrupts
-66.3% 784.50 ?150% interrupts.CPU73.PMI:Performance_monitoring_interrupts
-96.7% 116.00 ? 27% interrupts.CPU77.NMI:Non-maskable_interrupts
-96.7% 116.00 ? 27% interrupts.CPU77.PMI:Performance_monitoring_interrupts
-93.6% 101.00 ? 37% interrupts.CPU81.NMI:Non-maskable_interrupts
-93.6% 101.00 ? 37% interrupts.CPU81.PMI:Performance_monitoring_interrupts
-95.9% 102.75 ? 41% interrupts.CPU88.NMI:Non-maskable_interrupts
-95.9% 102.75 ? 41% interrupts.CPU88.PMI:Performance_monitoring_interrupts
2674 ? 46% interrupts.CPU9.RES:Rescheduling_interrupts
24803 ? 11% interrupts.CPU91.CAL:Function_call_interrupts
-93.6% 117.75 ? 24% interrupts.CPU94.NMI:Non-maskable_interrupts
-93.6% 117.75 ? 24% interrupts.CPU94.PMI:Performance_monitoring_interrupts
20.39 ? 3% perf-profile.calltrace.cycles-pp.do_faccessat.do_syscall_64.entry_SYSCALL_64_after_hwframe
8.50 ? 3% perf-profile.calltrace.cycles-pp.prepare_creds.do_faccessat.do_syscall_64.entry_SYSCALL_64_after_hwframe
6.92 ? 3% perf-profile.calltrace.cycles-pp.put_cred_rcu.do_faccessat.do_syscall_64.entry_SYSCALL_64_after_hwframe
1.60 ? 3% perf-profile.calltrace.cycles-pp.free_uid.put_cred_rcu.do_faccessat.do_syscall_64.entry_SYSCALL_64_after_hwframe
1.57 ? 3% perf-profile.calltrace.cycles-pp.refcount_dec_and_lock_irqsave.free_uid.put_cred_rcu.do_faccessat.do_syscall_64
1.56 ? 3% perf-profile.calltrace.cycles-pp.refcount_dec_not_one.refcount_dec_and_lock_irqsave.free_uid.put_cred_rcu.do_faccessat
2.19 ? 3% perf-profile.calltrace.cycles-pp.key_put.put_cred_rcu.do_faccessat.do_syscall_64.entry_SYSCALL_64_after_hwframe
2.74 ? 4% perf-profile.calltrace.cycles-pp.security_prepare_creds.prepare_creds.do_faccessat.do_syscall_64.entry_SYSCALL_64_after_hwframe
2.50 ? 4% perf-profile.calltrace.cycles-pp.btrfs_update_inode.btrfs_dirty_inode.btrfs_setattr.notify_change.chmod_common
1.84 ? 4% perf-profile.calltrace.cycles-pp.btrfs_delayed_update_inode.btrfs_update_inode.btrfs_dirty_inode.btrfs_setattr.notify_change
1.74 ? 4% perf-profile.calltrace.cycles-pp.apparmor_cred_prepare.security_prepare_creds.prepare_creds.do_faccessat.do_syscall_64
1.72 ? 6% perf-profile.calltrace.cycles-pp.security_cred_free.put_cred_rcu.do_faccessat.do_syscall_64.entry_SYSCALL_64_after_hwframe
1.08 ? 8% perf-profile.calltrace.cycles-pp.apparmor_cred_free.security_cred_free.put_cred_rcu.do_faccessat.do_syscall_64
2.04 ? 6% perf-profile.calltrace.cycles-pp.filename_lookup.do_faccessat.do_syscall_64.entry_SYSCALL_64_after_hwframe
1.96 ? 3% perf-profile.calltrace.cycles-pp.__do_sys_newfstatat.do_syscall_64.entry_SYSCALL_64_after_hwframe
1.82 ? 6% perf-profile.calltrace.cycles-pp.path_lookupat.filename_lookup.do_faccessat.do_syscall_64.entry_SYSCALL_64_after_hwframe
0.39 ? 57% perf-profile.calltrace.cycles-pp.join_transaction.start_transaction.btrfs_dirty_inode.btrfs_setattr.notify_change
1.75 ? 3% perf-profile.calltrace.cycles-pp.vfs_statx.__do_sys_newfstatat.do_syscall_64.entry_SYSCALL_64_after_hwframe
1.33 ? 2% perf-profile.calltrace.cycles-pp.__btrfs_release_delayed_node.btrfs_delayed_update_inode.btrfs_update_inode.btrfs_dirty_inode.btrfs_setattr
1.11 ? 6% perf-profile.calltrace.cycles-pp.link_path_walk.path_lookupat.filename_lookup.do_faccessat.do_syscall_64
0.91 ? 3% perf-profile.calltrace.cycles-pp.kmem_cache_alloc.prepare_creds.do_faccessat.do_syscall_64.entry_SYSCALL_64_after_hwframe
1.00 ? 4% perf-profile.calltrace.cycles-pp.user_path_at_empty.do_faccessat.do_syscall_64.entry_SYSCALL_64_after_hwframe
0.98 ? 4% perf-profile.calltrace.cycles-pp.getname_flags.user_path_at_empty.do_faccessat.do_syscall_64.entry_SYSCALL_64_after_hwframe
0.94 ? 3% perf-profile.calltrace.cycles-pp.__kmalloc.security_prepare_creds.prepare_creds.do_faccessat.do_syscall_64
0.77 ? 5% perf-profile.calltrace.cycles-pp.strncpy_from_user.getname_flags.user_path_at_empty.do_faccessat.do_syscall_64
0.63 ? 3% perf-profile.calltrace.cycles-pp.filename_lookup.vfs_statx.__do_sys_newfstatat.do_syscall_64.entry_SYSCALL_64_after_hwframe
0.58 ? 4% perf-profile.calltrace.cycles-pp.kmem_cache_free.do_faccessat.do_syscall_64.entry_SYSCALL_64_after_hwframe
0.61 ? 4% perf-profile.calltrace.cycles-pp.kfree.security_cred_free.put_cred_rcu.do_faccessat.do_syscall_64
0.57 ? 3% perf-profile.calltrace.cycles-pp.path_lookupat.filename_lookup.vfs_statx.__do_sys_newfstatat.do_syscall_64
0.98 ? 4% perf-profile.calltrace.cycles-pp._find_next_bit.cpumask_next.__percpu_counter_sum.__reserve_bytes.btrfs_reserve_metadata_bytes
1.56 ? 4% perf-profile.calltrace.cycles-pp.cpumask_next.__percpu_counter_sum.__reserve_bytes.btrfs_reserve_metadata_bytes.btrfs_block_rsv_add
4.23 ? 4% perf-profile.calltrace.cycles-pp.__percpu_counter_sum.__reserve_bytes.btrfs_reserve_metadata_bytes.btrfs_block_rsv_add.start_transaction
12.55 ? 4% perf-profile.calltrace.cycles-pp.native_queued_spin_lock_slowpath._raw_spin_lock.__reserve_bytes.btrfs_reserve_metadata_bytes.btrfs_block_rsv_add
13.01 ? 4% perf-profile.calltrace.cycles-pp._raw_spin_lock.__reserve_bytes.btrfs_reserve_metadata_bytes.btrfs_block_rsv_add.start_transaction
15.29 ? 3% perf-profile.calltrace.cycles-pp.native_queued_spin_lock_slowpath._raw_spin_lock.btrfs_block_rsv_release.btrfs_trans_release_metadata.__btrfs_end_transaction
15.81 ? 3% perf-profile.calltrace.cycles-pp._raw_spin_lock.btrfs_block_rsv_release.btrfs_trans_release_metadata.__btrfs_end_transaction.btrfs_dirty_inode
16.04 ? 3% perf-profile.calltrace.cycles-pp.btrfs_block_rsv_release.btrfs_trans_release_metadata.__btrfs_end_transaction.btrfs_dirty_inode.btrfs_setattr
16.05 ? 3% perf-profile.calltrace.cycles-pp.btrfs_trans_release_metadata.__btrfs_end_transaction.btrfs_dirty_inode.btrfs_setattr.notify_change
17.34 ? 3% perf-profile.calltrace.cycles-pp.__btrfs_end_transaction.btrfs_dirty_inode.btrfs_setattr.notify_change.chmod_common
18.27 ? 4% perf-profile.calltrace.cycles-pp.__reserve_bytes.btrfs_reserve_metadata_bytes.btrfs_block_rsv_add.start_transaction.btrfs_dirty_inode
18.39 ? 4% perf-profile.calltrace.cycles-pp.btrfs_reserve_metadata_bytes.btrfs_block_rsv_add.start_transaction.btrfs_dirty_inode.btrfs_setattr
20.61 ? 4% perf-profile.calltrace.cycles-pp.start_transaction.btrfs_dirty_inode.btrfs_setattr.notify_change.chmod_common
18.88 ? 4% perf-profile.calltrace.cycles-pp.btrfs_block_rsv_add.start_transaction.btrfs_dirty_inode.btrfs_setattr.notify_change
41.40 ? 3% perf-profile.calltrace.cycles-pp.__x64_sys_fchmod.do_syscall_64.entry_SYSCALL_64_after_hwframe
41.36 ? 3% perf-profile.calltrace.cycles-pp.chmod_common.__x64_sys_fchmod.do_syscall_64.entry_SYSCALL_64_after_hwframe
40.94 ? 3% perf-profile.calltrace.cycles-pp.notify_change.chmod_common.__x64_sys_fchmod.do_syscall_64.entry_SYSCALL_64_after_hwframe
40.80 ? 3% perf-profile.calltrace.cycles-pp.btrfs_setattr.notify_change.chmod_common.__x64_sys_fchmod.do_syscall_64
40.56 ? 4% perf-profile.calltrace.cycles-pp.btrfs_dirty_inode.btrfs_setattr.notify_change.chmod_common.__x64_sys_fchmod
20.41 ? 3% perf-profile.children.cycles-pp.do_faccessat
8.51 ? 3% perf-profile.children.cycles-pp.prepare_creds
6.93 ? 3% perf-profile.children.cycles-pp.put_cred_rcu
1.60 ? 3% perf-profile.children.cycles-pp.free_uid
1.58 ? 3% perf-profile.children.cycles-pp.refcount_dec_and_lock_irqsave
1.56 ? 3% perf-profile.children.cycles-pp.refcount_dec_not_one
2.21 ? 3% perf-profile.children.cycles-pp.key_put
2.75 ? 4% perf-profile.children.cycles-pp.security_prepare_creds
2.50 ? 4% perf-profile.children.cycles-pp.btrfs_update_inode
1.84 ? 4% perf-profile.children.cycles-pp.btrfs_delayed_update_inode
1.74 ? 4% perf-profile.children.cycles-pp.apparmor_cred_prepare
1.72 ? 6% perf-profile.children.cycles-pp.security_cred_free
2.68 ? 5% perf-profile.children.cycles-pp.filename_lookup
2.40 ? 5% perf-profile.children.cycles-pp.path_lookupat
1.09 ? 9% perf-profile.children.cycles-pp.apparmor_cred_free
1.96 ? 3% perf-profile.children.cycles-pp.__do_sys_newfstatat
1.75 ? 3% perf-profile.children.cycles-pp.vfs_statx
1.34 ? 3% perf-profile.children.cycles-pp.__btrfs_release_delayed_node
0.49 ? 7% perf-profile.children.cycles-pp.join_transaction
1.49 ? 6% perf-profile.children.cycles-pp.link_path_walk
1.23 ? 4% perf-profile.children.cycles-pp.kmem_cache_alloc
1.30 ? 4% perf-profile.children.cycles-pp.user_path_at_empty
1.29 ? 4% perf-profile.children.cycles-pp.getname_flags
0.50 ? 6% perf-profile.children.cycles-pp.common_perm_cond
0.92 ? 7% perf-profile.children.cycles-pp.inode_permission
0.46 ? 6% perf-profile.children.cycles-pp.common_perm
0.97 ? 3% perf-profile.children.cycles-pp.__kmalloc
0.99 ? 4% perf-profile.children.cycles-pp.strncpy_from_user
0.79 ? 5% perf-profile.children.cycles-pp.kmem_cache_free
0.62 ? 13% perf-profile.children.cycles-pp.mutex_lock
0.14 ? 16% perf-profile.children.cycles-pp.btrfs_get_or_create_delayed_node
0.14 ? 18% perf-profile.children.cycles-pp.btrfs_get_delayed_node
0.46 ? 4% perf-profile.children.cycles-pp.generic_permission
0.56 ? 6% perf-profile.children.cycles-pp.walk_component
0.61 ? 4% perf-profile.children.cycles-pp.kfree
0.26 ? 3% perf-profile.children.cycles-pp.security_path_chmod
0.31 ? 7% perf-profile.children.cycles-pp.vfs_getattr
0.30 ? 7% perf-profile.children.cycles-pp.security_inode_getattr
0.46 ? 6% perf-profile.children.cycles-pp.btrfs_update_root_times
0.39 ? 5% perf-profile.children.cycles-pp.mutex_unlock
0.39 ? 9% perf-profile.children.cycles-pp.syscall_return_via_sysret
0.44 ? 4% perf-profile.children.cycles-pp.__check_object_size
0.37 ? 3% perf-profile.children.cycles-pp.complete_walk
0.26 ? 5% perf-profile.children.cycles-pp.get_obj_cgroup_from_current
0.22 ? 16% perf-profile.children.cycles-pp.revert_creds
0.36 ? 3% perf-profile.children.cycles-pp.unlazy_walk
0.28 ? 5% perf-profile.children.cycles-pp.obj_cgroup_charge
0.38 ? 3% perf-profile.children.cycles-pp.btrfs_getattr
0.33 ? 9% perf-profile.children.cycles-pp.lookup_fast
0.29 ? 15% perf-profile.children.cycles-pp.btrfs_permission
0.15 ? 8% perf-profile.children.cycles-pp.capable_wrt_inode_uidgid
0.29 perf-profile.children.cycles-pp.__legitimize_path
0.14 ? 10% perf-profile.children.cycles-pp.security_capable
0.13 ? 11% perf-profile.children.cycles-pp.apparmor_capable
0.15 ? 8% perf-profile.children.cycles-pp.ns_capable_common
0.28 ? 10% perf-profile.children.cycles-pp.refill_obj_stock
0.12 ? 27% perf-profile.children.cycles-pp.map_id_up
0.20 ? 10% perf-profile.children.cycles-pp.cp_new_stat
0.28 ? 6% perf-profile.children.cycles-pp.__mod_memcg_lruvec_state
0.23 ? 8% perf-profile.children.cycles-pp.path_put
0.22 ? 11% perf-profile.children.cycles-pp.dput
0.22 ? 9% perf-profile.children.cycles-pp.__d_lookup_rcu
0.19 ? 12% perf-profile.children.cycles-pp.path_init
0.24 ? 5% perf-profile.children.cycles-pp.__entry_text_start
0.23 ? 9% perf-profile.children.cycles-pp.___might_sleep
0.20 ? 4% perf-profile.children.cycles-pp.__check_heap_object
0.16 ? 7% perf-profile.children.cycles-pp.__list_add_valid
0.16 ? 11% perf-profile.children.cycles-pp.__might_sleep
0.13 ? 5% perf-profile.children.cycles-pp._cond_resched
0.09 ? 7% perf-profile.children.cycles-pp.fill_stack_inode_item
0.14 ? 12% perf-profile.children.cycles-pp.syscall_enter_from_user_mode
0.15 ? 7% perf-profile.children.cycles-pp.__legitimize_mnt
0.10 ? 11% perf-profile.children.cycles-pp.override_creds
0.10 ? 11% perf-profile.children.cycles-pp.__list_del_entry_valid
0.10 ? 12% perf-profile.children.cycles-pp.step_into
0.12 ? 12% perf-profile.children.cycles-pp.lockref_get_not_dead
0.13 ? 12% perf-profile.children.cycles-pp.__mod_memcg_state
0.12 ? 11% perf-profile.children.cycles-pp.rcu_read_unlock_strict
0.09 ? 13% perf-profile.children.cycles-pp.lockref_put_or_lock
0.12 ? 3% perf-profile.children.cycles-pp.memset_erms
0.12 ? 7% perf-profile.children.cycles-pp.syscall_exit_to_user_mode
0.11 ? 4% perf-profile.children.cycles-pp._copy_to_user
0.04 ? 58% perf-profile.children.cycles-pp.mnt_want_write
0.07 ? 13% perf-profile.children.cycles-pp.inode_get_bytes
0.07 ? 13% perf-profile.children.cycles-pp.rcu_all_qs
0.06 ? 11% perf-profile.children.cycles-pp.security_inode_permission
0.05 ? 8% perf-profile.children.cycles-pp.__fget_light
0.07 ? 7% perf-profile.children.cycles-pp.entry_SYSCALL_64_safe_stack
0.08 ? 8% perf-profile.children.cycles-pp.copy_user_enhanced_fast_string
0.07 ? 7% perf-profile.children.cycles-pp.__put_cred
0.07 ? 14% perf-profile.children.cycles-pp.btrfs_balance_delayed_items
0.06 ? 14% perf-profile.children.cycles-pp.exit_to_user_mode_prepare
0.08 ? 6% perf-profile.children.cycles-pp.__x86_indirect_thunk_rax
0.06 ? 15% perf-profile.children.cycles-pp.mntput_no_expire
0.28 ? 12% perf-profile.children.cycles-pp.btrfs_put_transaction
0.15 ? 9% perf-profile.children.cycles-pp._raw_spin_unlock_irqrestore
0.21 ? 10% perf-profile.children.cycles-pp.find_next_bit
0.38 ? 4% perf-profile.children.cycles-pp._raw_spin_lock_irqsave
0.43 ? 14% perf-profile.children.cycles-pp.btrfs_get_alloc_profile
0.46 ? 14% perf-profile.children.cycles-pp.calc_available_free_space
0.48 ? 2% perf-profile.children.cycles-pp.btrfs_block_rsv_add_bytes
0.48 ? 8% perf-profile.children.cycles-pp.wait_current_trans
1.00 ? 4% perf-profile.children.cycles-pp._find_next_bit
1.77 ? 4% perf-profile.children.cycles-pp.cpumask_next
4.24 ? 4% perf-profile.children.cycles-pp.__percpu_counter_sum
16.04 ? 3% perf-profile.children.cycles-pp.btrfs_block_rsv_release
16.05 ? 3% perf-profile.children.cycles-pp.btrfs_trans_release_metadata
17.35 ? 3% perf-profile.children.cycles-pp.__btrfs_end_transaction
18.27 ? 4% perf-profile.children.cycles-pp.__reserve_bytes
18.39 ? 4% perf-profile.children.cycles-pp.btrfs_reserve_metadata_bytes
20.61 ? 4% perf-profile.children.cycles-pp.start_transaction
18.88 ? 4% perf-profile.children.cycles-pp.btrfs_block_rsv_add
27.88 ? 3% perf-profile.children.cycles-pp.native_queued_spin_lock_slowpath
30.66 ? 3% perf-profile.children.cycles-pp._raw_spin_lock
41.41 ? 3% perf-profile.children.cycles-pp.__x64_sys_fchmod
41.36 ? 3% perf-profile.children.cycles-pp.chmod_common
40.95 ? 3% perf-profile.children.cycles-pp.notify_change
40.80 ? 3% perf-profile.children.cycles-pp.btrfs_setattr
40.56 ? 4% perf-profile.children.cycles-pp.btrfs_dirty_inode
4.81 ? 4% perf-profile.self.cycles-pp.prepare_creds
1.55 ? 3% perf-profile.self.cycles-pp.refcount_dec_not_one
1.42 ? 4% perf-profile.self.cycles-pp.put_cred_rcu
2.19 ? 3% perf-profile.self.cycles-pp.key_put
1.73 ? 4% perf-profile.self.cycles-pp.apparmor_cred_prepare
1.08 ? 9% perf-profile.self.cycles-pp.apparmor_cred_free
0.45 ? 5% perf-profile.self.cycles-pp.common_perm
0.58 ? 13% perf-profile.self.cycles-pp.mutex_lock
0.13 ? 20% perf-profile.self.cycles-pp.btrfs_get_delayed_node
0.63 ? 5% perf-profile.self.cycles-pp.kmem_cache_alloc
0.64 ? 4% perf-profile.self.cycles-pp.link_path_walk
0.55 ? 5% perf-profile.self.cycles-pp.kmem_cache_free
0.48 ? 4% perf-profile.self.cycles-pp.__kmalloc
0.39 ? 6% perf-profile.self.cycles-pp.mutex_unlock
0.46 ? 5% perf-profile.self.cycles-pp.strncpy_from_user
0.39 ? 9% perf-profile.self.cycles-pp.syscall_return_via_sysret
0.22 ? 16% perf-profile.self.cycles-pp.revert_creds
0.40 ? 3% perf-profile.self.cycles-pp.kfree
0.38 ? 7% perf-profile.self.cycles-pp.join_transaction
0.22 ? 5% perf-profile.self.cycles-pp.get_obj_cgroup_from_current
0.27 ? 5% perf-profile.self.cycles-pp.obj_cgroup_charge
0.13 ? 11% perf-profile.self.cycles-pp.apparmor_capable
0.28 ? 16% perf-profile.self.cycles-pp.btrfs_permission
0.27 ? 8% perf-profile.self.cycles-pp.generic_permission
0.27 ? 10% perf-profile.self.cycles-pp.refill_obj_stock
0.32 ? 2% perf-profile.self.cycles-pp.btrfs_getattr
0.12 ? 25% perf-profile.self.cycles-pp.map_id_up
0.23 ? 4% perf-profile.self.cycles-pp.__entry_text_start
0.22 ? 9% perf-profile.self.cycles-pp.__d_lookup_rcu
0.25 ? 5% perf-profile.self.cycles-pp.do_faccessat
0.20 ? 13% perf-profile.self.cycles-pp.inode_permission
0.22 ? 9% perf-profile.self.cycles-pp.___might_sleep
0.20 ? 4% perf-profile.self.cycles-pp.__check_heap_object
0.16 ? 7% perf-profile.self.cycles-pp.__list_add_valid
0.17 ? 11% perf-profile.self.cycles-pp.path_init
0.15 ? 10% perf-profile.self.cycles-pp.__might_sleep
0.16 ? 7% perf-profile.self.cycles-pp.__check_object_size
0.13 ? 13% perf-profile.self.cycles-pp.syscall_enter_from_user_mode
0.09 ? 7% perf-profile.self.cycles-pp.override_creds
0.14 ? 8% perf-profile.self.cycles-pp.__legitimize_mnt
0.12 ? 12% perf-profile.self.cycles-pp.entry_SYSCALL_64_after_hwframe
0.06 perf-profile.self.cycles-pp.btrfs_update_inode
0.13 ? 5% perf-profile.self.cycles-pp.walk_component
0.10 ? 11% perf-profile.self.cycles-pp.step_into
0.10 ? 11% perf-profile.self.cycles-pp.__list_del_entry_valid
0.12 ? 12% perf-profile.self.cycles-pp.lockref_get_not_dead
0.13 ? 12% perf-profile.self.cycles-pp.__mod_memcg_state
0.10 ? 11% perf-profile.self.cycles-pp.lookup_fast
0.08 ? 13% perf-profile.self.cycles-pp.lockref_put_or_lock
0.14 ? 5% perf-profile.self.cycles-pp.__mod_memcg_lruvec_state
0.08 ? 10% perf-profile.self.cycles-pp.filename_lookup
0.11 ? 3% perf-profile.self.cycles-pp.memset_erms
0.08 ? 5% perf-profile.self.cycles-pp.getname_flags
0.03 ?100% perf-profile.self.cycles-pp.dput
0.06 ? 11% perf-profile.self.cycles-pp.security_inode_permission
0.10 ? 14% perf-profile.self.cycles-pp.rcu_read_unlock_strict
0.08 ? 10% perf-profile.self.cycles-pp.copy_user_enhanced_fast_string
0.06 ? 13% perf-profile.self.cycles-pp._cond_resched
0.07 ? 7% perf-profile.self.cycles-pp.entry_SYSCALL_64_safe_stack
0.05 ? 8% perf-profile.self.cycles-pp.__fget_light
0.07 ? 13% perf-profile.self.cycles-pp.path_lookupat
0.07 ? 20% perf-profile.self.cycles-pp.btrfs_balance_delayed_items
0.07 ? 10% perf-profile.self.cycles-pp.__virt_addr_valid
0.06 ? 6% perf-profile.self.cycles-pp.__put_cred
0.04 ? 60% perf-profile.self.cycles-pp.exit_to_user_mode_prepare
0.06 ? 17% perf-profile.self.cycles-pp.notify_change
0.05 ? 8% perf-profile.self.cycles-pp.mntput_no_expire
0.28 ? 12% perf-profile.self.cycles-pp.btrfs_put_transaction
0.13 ? 11% perf-profile.self.cycles-pp._raw_spin_unlock_irqrestore
0.12 ? 5% perf-profile.self.cycles-pp.btrfs_reserve_metadata_bytes
0.14 ? 13% perf-profile.self.cycles-pp.btrfs_block_rsv_release
0.16 ? 18% perf-profile.self.cycles-pp.btrfs_get_alloc_profile
0.18 ? 7% perf-profile.self.cycles-pp.wait_current_trans
0.64 ? 6% perf-profile.self.cycles-pp.start_transaction
0.21 ? 10% perf-profile.self.cycles-pp.find_next_bit
0.38 ? 4% perf-profile.self.cycles-pp._raw_spin_lock_irqsave
0.57 ? 14% perf-profile.self.cycles-pp.__reserve_bytes
0.57 ? 7% perf-profile.self.cycles-pp.cpumask_next
0.98 ? 11% perf-profile.self.cycles-pp.__btrfs_end_transaction
0.99 ? 4% perf-profile.self.cycles-pp._find_next_bit
2.77 ? 6% perf-profile.self.cycles-pp._raw_spin_lock
2.08 ? 4% perf-profile.self.cycles-pp.__percpu_counter_sum
27.79 ? 3% perf-profile.self.cycles-pp.native_queued_spin_lock_slowpath

stress-ng.access.ops

--------------------------------------------------+
.+..+..+. .+.. .+..+..+..+..+..+..+ |
+. +. +. |
|
|
|
O O O O O O O O O O O O |
O O O |
|
|
|
|
|
|
--------------------------------------------------+

stress-ng.access.ops_per_sec

--------------------------------------------------+
.+..+..+. .+.. .+..+...+..+..+..+..+ |
+. +. +. |
|
|
|
O O O O O O O O O O O O |
O O O |
|
|
|
|
|
|
--------------------------------------------------+

stress-ng.chmod.ops

--------------------------------------------------+
|
+..+.. .+.. |
+. +.. +.. +.. +.. |
..+.. .. .. .. +.. |
+. + + + +..+..+ |
|
|
O O O |
O O O O O O O O O O O O O O O O |
|
|
|
|
--------------------------------------------------+

stress-ng.chmod.ops_per_sec

--------------------------------------------------+
+.. .+.. |
+ +..+. +.. +.. |
.+.. .+.. + |
+...+..+. +. + +... .+..+ |
+ +. |
|
|
O O O O O O O |
O O O O O O O O |
|
|
|
|
--------------------------------------------------+

stress-ng.chown.ops

--------------------------------------------------+
+.. |
+. +.. .+.. .. .+..+.. .+.. |
+. + +..+..+..+. +. .+ |
+. |
|
|
O O O O O O O |
O O O O O O O O |
|
|
|
|
|
--------------------------------------------------+

stress-ng.chown.ops_per_sec

--------------------------------------------------+
+.. |
+. +.. .+.. .. .+...+.. .+.. |
+. + +..+..+..+. +. .+ |
+. |
|
|
O O O O O O O |
O O O O O O O O |
|
|
|
|
|
--------------------------------------------------+

stress-ng.utime.ops

--------------------------------------------------+
.+..+.. .+.. .+.. .+.. |
+. +. +. .+..+..+..+.. .+ |
+..+..+..+. +. |
|
|
|
|
|
|
O O O O O |
O O O O O O O O O O |
|
|
--------------------------------------------------+

stress-ng.utime.ops_per_sec

--------------------------------------------------+
|
.+.. ..+.. |
+ +. +. .+.. .+..+..+..+..+.. .+ |
+. +. +. |
|
|
|
|
|
|
O O O O O O O O O O O O O O O O O O O |
|
|
--------------------------------------------------+

estimated based on internal Intel analysis and are provided
purposes only. Any difference in system hardware or software
may affect actual performance.

Attachments:

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config-5.10.0-rc7-ge86bb85b1fec (173.70 kB)
job-script (8.41 kB)
job.yaml (5.71 kB)
reproduce (604.00 B)
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2021-01-13 07:18:38

by Qu Wenruo

[permalink] [raw]

Subject: Re: [btrfs] e86bb85b1f: stress-ng.utime.ops_per_sec -70.1% regression

On 2021/1/12 下午11:24, kernel test robot wrote:
>
> Greeting,
>
> FYI, we noticed a -70.1% regression of stress-ng.utime.ops_per_sec due to commit:
>
>
> commit: e86bb85b1fec48bcb8dfb79ec9f104d1a38fda78 ("[PATCH] btrfs: make btrfs_dirty_inode() to always reserve metadata space")
> url: https://github.com/0day-ci/linux/commits/Qu-Wenruo/btrfs-make-btrfs_dirty_inode-to-always-reserve-metadata-space/20210108-134133
> base: https://git.kernel.org/cgit/linux/kernel/git/kdave/linux.git for-next
>
> in testcase: stress-ng
> on test machine: 96 threads Intel(R) Xeon(R) Gold 6252 CPU @ 2.10GHz with 512G memory
> with following parameters:
>
> nr_threads: 10%
> disk: 1HDD
> testtime: 30s
> class: filesystem
> cpufreq_governor: performance
> ucode: 0x5003003
> fs: btrfs
>
>
>
>
> If you fix the issue, kindly add following tag
> Reported-by: kernel test robot <[email protected]>
>
>
> Details are as below:
> -------------------------------------------------------------------------------------------------->
>
>
> To reproduce:
>
> git clone https://github.com/intel/lkp-tests.git
> cd lkp-tests
> bin/lkp install job.yaml # job file is attached in this email
> bin/lkp run job.yaml
>
> =========================================================================================
> class/compiler/cpufreq_governor/disk/fs/kconfig/nr_threads/rootfs/tbox_group/testcase/testtime/ucode:
> filesystem/gcc-9/performance/1HDD/btrfs/x86_64-rhel-8.3/10%/debian-10.4-x86_64-20200603.cgz/lkp-csl-2sp7/stress-ng/30s/0x5003003
>
> commit:
> 97847e0652 ("Merge branch 'for-next-next-v5.10-20201211' into for-next-20201211")
> e86bb85b1f ("btrfs: make btrfs_dirty_inode() to always reserve metadata space")
>
> 97847e06525b51ea e86bb85b1fec48bcb8dfb79ec9f
> ---------------- ---------------------------
> %stddev %change %stddev
> \ | \
> 1098218 -40.4% 654054 stress-ng.access.ops
> 36607 -40.4% 21801 stress-ng.access.ops_per_sec

This is a little interesting.
Although accessing an inode will update its atime, but don't we have
lazy_atime mount option?

> 92962 ± 2% -44.1% 51992 ± 3% stress-ng.chmod.ops
> 3098 ± 2% -44.1% 1733 ± 3% stress-ng.chmod.ops_per_sec
> 936128 ± 6% -41.0% 552284 stress-ng.chown.ops
> 31204 ± 6% -41.0% 18409 stress-ng.chown.ops_per_sec
> 1939514 -18.5% 1580533 stress-ng.fcntl.ops
> 64650 -18.5% 52684 stress-ng.fcntl.ops_per_sec
> 3705607 ± 2% -70.1% 1109769 stress-ng.utime.ops
> 123519 ± 2% -70.1% 36992 stress-ng.utime.ops_per_sec

Another interesting part is, only stress-ng is reporting such
regressioin on the commit?
No other report on the commit with different test env? E.g. NVME SSD?

Above operations is affected by such commit, but I'm a little surprised
only one report here.

Just because flushing on HDD is more expensive? If no other test suite
is fine, I would prefer to accept the drop, as it really streamline the
operations.

Thanks,
Qu

> 381.20 ± 6% +12.3% 428.27 ± 9% sched_debug.cfs_rq:/.load_avg.avg
> 6316 ± 57% -79.8% 1278 ± 68% softirqs.CPU77.BLOCK
> 10488 ±101% -89.5% 1100 ±124% softirqs.CPU78.BLOCK
> 5605 ± 92% -82.3% 990.50 ± 32% softirqs.CPU80.BLOCK
> 6094 ±128% -89.9% 614.50 ± 44% softirqs.CPU92.BLOCK
> 4921 ± 9% +20.5% 5931 ± 5% slabinfo.dmaengine-unmap-16.active_objs
> 4922 ± 9% +20.5% 5933 ± 5% slabinfo.dmaengine-unmap-16.num_objs
> 9818 ± 5% -6.9% 9139 ± 3% slabinfo.kmalloc-rcl-256.active_objs
> 49223 ± 3% -18.4% 40177 ± 3% slabinfo.radix_tree_node.active_objs
> 903.25 ± 3% -18.0% 740.50 ± 3% slabinfo.radix_tree_node.active_slabs
> 50620 ± 3% -18.0% 41505 ± 3% slabinfo.radix_tree_node.num_objs
> 903.25 ± 3% -18.0% 740.50 ± 3% slabinfo.radix_tree_node.num_slabs
> 9927 ± 3% +5.8% 10504 proc-vmstat.nr_active_anon
> 6043459 ± 2% -2.2% 5911900 proc-vmstat.nr_dirtied
> 1125 -6.1% 1056 ± 4% proc-vmstat.nr_dirty
> 20361 ± 2% +4.7% 21309 proc-vmstat.nr_shmem
> 66221 -4.3% 63404 ± 2% proc-vmstat.nr_slab_reclaimable
> 9927 ± 3% +5.8% 10504 proc-vmstat.nr_zone_active_anon
> 1225 -5.8% 1154 ± 3% proc-vmstat.nr_zone_write_pending
> 11313111 -2.1% 11072335 proc-vmstat.pgfault
> 0.00 +125.0% 0.00 ± 19% perf-sched.sch_delay.avg.ms.preempt_schedule_common._cond_resched.kmem_cache_alloc.start_transaction.btrfs_dirty_inode
> 0.01 ± 13% -24.5% 0.01 ± 15% perf-sched.sch_delay.max.ms.do_wait.kernel_wait4.__do_sys_wait4.do_syscall_64
> 3.26 ± 41% -98.8% 0.04 perf-sched.sch_delay.max.ms.rwsem_down_write_slowpath.chmod_common.do_fchmodat.__x64_sys_chmod
> 0.00 ± 50% +123.5% 0.01 ± 24% perf-sched.sch_delay.max.ms.wait_for_partner.fifo_open.do_dentry_open.path_openat
> 4.77 ± 6% -25.7% 3.54 perf-sched.total_sch_delay.max.ms
> 0.02 ± 7% +19.5% 0.02 ± 5% perf-sched.wait_and_delay.avg.ms.rwsem_down_write_slowpath.chmod_common.do_fchmodat.__x64_sys_fchmodat
> 1711 ± 27% +60.7% 2750 ± 22% perf-sched.wait_and_delay.count.rwsem_down_write_slowpath.chmod_common.__x64_sys_fchmod.do_syscall_64
> 0.03 ±132% +2497.6% 0.81 ± 66% perf-sched.wait_time.avg.ms.preempt_schedule_common._cond_resched.dput.path_put.do_fchmodat
> 0.25 ± 67% +243.4% 0.86 ± 49% perf-sched.wait_time.avg.ms.preempt_schedule_common._cond_resched.kmem_cache_alloc.start_transaction.btrfs_dirty_inode
> 0.02 ± 11% +28.6% 0.02 ± 13% perf-sched.wait_time.avg.ms.rwsem_down_write_slowpath.chmod_common.do_fchmodat.__x64_sys_chmod
> 0.27 ±160% +1248.5% 3.67 ± 57% perf-sched.wait_time.max.ms.preempt_schedule_common._cond_resched.dput.path_put.do_fchmodat
> 0.04 ±165% +4851.4% 2.17 ± 99% perf-sched.wait_time.max.ms.preempt_schedule_common._cond_resched.mnt_want_write.chmod_common.do_fchmodat
> 36969238 -5.8% 34829162 ± 2% perf-stat.i.cache-misses
> 2.009e+09 -2.7% 1.954e+09 perf-stat.i.dTLB-stores
> 12297175 ± 2% -6.5% 11500340 perf-stat.i.iTLB-load-misses
> 1843 +7.0% 1972 ± 2% perf-stat.i.instructions-per-iTLB-miss
> 8936 -2.2% 8740 perf-stat.i.minor-faults
> 952962 -3.6% 919068 perf-stat.i.node-loads
> 5348157 -7.4% 4950006 ± 2% perf-stat.i.node-store-misses
> 8942 -2.2% 8748 perf-stat.i.page-faults
> 0.00 ± 20% +0.0 0.00 ± 18% perf-stat.overall.dTLB-store-miss-rate%
> 1263 +6.1% 1339 perf-stat.overall.instructions-per-iTLB-miss
> 36924576 -5.8% 34784593 ± 2% perf-stat.ps.cache-misses
> 2.003e+09 -2.7% 1.949e+09 perf-stat.ps.dTLB-stores
> 12274047 ± 2% -6.5% 11479296 perf-stat.ps.iTLB-load-misses
> 8880 -2.1% 8694 perf-stat.ps.minor-faults
> 950813 -3.6% 916929 perf-stat.ps.node-loads
> 5343222 -7.5% 4944422 ± 2% perf-stat.ps.node-store-misses
> 8887 -2.1% 8702 perf-stat.ps.page-faults
> 57.00 ±166% -100.0% 0.00 interrupts.92:PCI-MSI.31981625-edge.i40e-eth0-TxRx-56
> 19339 ± 7% +31.3% 25385 ± 16% interrupts.CPU13.CAL:Function_call_interrupts
> 19917 ± 5% +9.7% 21856 interrupts.CPU23.TLB:TLB_shootdowns
> 20940 ± 5% +9.5% 22935 ± 4% interrupts.CPU29.CAL:Function_call_interrupts
> 3470 ± 65% -96.1% 136.75 ± 5% interrupts.CPU29.NMI:Non-maskable_interrupts
> 3470 ± 65% -96.1% 136.75 ± 5% interrupts.CPU29.PMI:Performance_monitoring_interrupts
> 2061 ±160% -93.5% 134.00 ± 3% interrupts.CPU33.NMI:Non-maskable_interrupts
> 2061 ±160% -93.5% 134.00 ± 3% interrupts.CPU33.PMI:Performance_monitoring_interrupts
> 3041 ± 47% +75.6% 5342 ± 36% interrupts.CPU35.RES:Rescheduling_interrupts
> 3748 ± 96% -96.5% 133.00 ± 5% interrupts.CPU40.NMI:Non-maskable_interrupts
> 3748 ± 96% -96.5% 133.00 ± 5% interrupts.CPU40.PMI:Performance_monitoring_interrupts
> 21172 ± 5% -12.7% 18476 ± 6% interrupts.CPU45.CAL:Function_call_interrupts
> 56.25 ±169% -100.0% 0.00 interrupts.CPU56.92:PCI-MSI.31981625-edge.i40e-eth0-TxRx-56
> 122.50 ± 25% -34.5% 80.25 ± 32% interrupts.CPU56.NMI:Non-maskable_interrupts
> 122.50 ± 25% -34.5% 80.25 ± 32% interrupts.CPU56.PMI:Performance_monitoring_interrupts
> 21585 ± 5% +13.4% 24479 ± 5% interrupts.CPU58.TLB:TLB_shootdowns
> 3340 ± 22% +76.3% 5888 ± 48% interrupts.CPU62.RES:Rescheduling_interrupts
> 23969 ± 5% +12.5% 26976 ± 14% interrupts.CPU66.CAL:Function_call_interrupts
> 22832 ± 5% +26.5% 28873 ± 14% interrupts.CPU69.CAL:Function_call_interrupts
> 2329 ±106% -66.3% 784.50 ±150% interrupts.CPU73.NMI:Non-maskable_interrupts
> 2329 ±106% -66.3% 784.50 ±150% interrupts.CPU73.PMI:Performance_monitoring_interrupts
> 3520 ± 65% -96.7% 116.00 ± 27% interrupts.CPU77.NMI:Non-maskable_interrupts
> 3520 ± 65% -96.7% 116.00 ± 27% interrupts.CPU77.PMI:Performance_monitoring_interrupts
> 1570 ±156% -93.6% 101.00 ± 37% interrupts.CPU81.NMI:Non-maskable_interrupts
> 1570 ±156% -93.6% 101.00 ± 37% interrupts.CPU81.PMI:Performance_monitoring_interrupts
> 2501 ±109% -95.9% 102.75 ± 41% interrupts.CPU88.NMI:Non-maskable_interrupts
> 2501 ±109% -95.9% 102.75 ± 41% interrupts.CPU88.PMI:Performance_monitoring_interrupts
> 5208 ± 44% -48.6% 2674 ± 46% interrupts.CPU9.RES:Rescheduling_interrupts
> 20273 ± 10% +22.3% 24803 ± 11% interrupts.CPU91.CAL:Function_call_interrupts
> 1833 ±158% -93.6% 117.75 ± 24% interrupts.CPU94.NMI:Non-maskable_interrupts
> 1833 ±158% -93.6% 117.75 ± 24% interrupts.CPU94.PMI:Performance_monitoring_interrupts
> 47.69 ± 11% -27.3 20.39 ± 3% perf-profile.calltrace.cycles-pp.do_faccessat.do_syscall_64.entry_SYSCALL_64_after_hwframe
> 20.56 ± 11% -12.1 8.50 ± 3% perf-profile.calltrace.cycles-pp.prepare_creds.do_faccessat.do_syscall_64.entry_SYSCALL_64_after_hwframe
> 18.78 ± 11% -11.9 6.92 ± 3% perf-profile.calltrace.cycles-pp.put_cred_rcu.do_faccessat.do_syscall_64.entry_SYSCALL_64_after_hwframe
> 5.42 ± 12% -3.8 1.60 ± 3% perf-profile.calltrace.cycles-pp.free_uid.put_cred_rcu.do_faccessat.do_syscall_64.entry_SYSCALL_64_after_hwframe
> 5.38 ± 12% -3.8 1.57 ± 3% perf-profile.calltrace.cycles-pp.refcount_dec_and_lock_irqsave.free_uid.put_cred_rcu.do_faccessat.do_syscall_64
> 5.36 ± 12% -3.8 1.56 ± 3% perf-profile.calltrace.cycles-pp.refcount_dec_not_one.refcount_dec_and_lock_irqsave.free_uid.put_cred_rcu.do_faccessat
> 5.32 ± 11% -3.1 2.19 ± 3% perf-profile.calltrace.cycles-pp.key_put.put_cred_rcu.do_faccessat.do_syscall_64.entry_SYSCALL_64_after_hwframe
> 5.17 ± 11% -2.4 2.74 ± 4% perf-profile.calltrace.cycles-pp.security_prepare_creds.prepare_creds.do_faccessat.do_syscall_64.entry_SYSCALL_64_after_hwframe
> 4.77 ± 8% -2.3 2.50 ± 4% perf-profile.calltrace.cycles-pp.btrfs_update_inode.btrfs_dirty_inode.btrfs_setattr.notify_change.chmod_common
> 3.79 ± 7% -2.0 1.84 ± 4% perf-profile.calltrace.cycles-pp.btrfs_delayed_update_inode.btrfs_update_inode.btrfs_dirty_inode.btrfs_setattr.notify_change
> 3.54 ± 12% -1.8 1.74 ± 4% perf-profile.calltrace.cycles-pp.apparmor_cred_prepare.security_prepare_creds.prepare_creds.do_faccessat.do_syscall_64
> 3.49 ± 9% -1.8 1.72 ± 6% perf-profile.calltrace.cycles-pp.security_cred_free.put_cred_rcu.do_faccessat.do_syscall_64.entry_SYSCALL_64_after_hwframe
> 2.49 ± 9% -1.4 1.08 ± 8% perf-profile.calltrace.cycles-pp.apparmor_cred_free.security_cred_free.put_cred_rcu.do_faccessat.do_syscall_64
> 3.38 ± 11% -1.3 2.04 ± 6% perf-profile.calltrace.cycles-pp.filename_lookup.do_faccessat.do_syscall_64.entry_SYSCALL_64_after_hwframe
> 3.25 ± 11% -1.3 1.96 ± 3% perf-profile.calltrace.cycles-pp.__do_sys_newfstatat.do_syscall_64.entry_SYSCALL_64_after_hwframe
> 2.99 ± 11% -1.2 1.82 ± 6% perf-profile.calltrace.cycles-pp.path_lookupat.filename_lookup.do_faccessat.do_syscall_64.entry_SYSCALL_64_after_hwframe
> 1.55 ± 11% -1.2 0.39 ± 57% perf-profile.calltrace.cycles-pp.join_transaction.start_transaction.btrfs_dirty_inode.btrfs_setattr.notify_change
> 2.89 ± 10% -1.1 1.75 ± 3% perf-profile.calltrace.cycles-pp.vfs_statx.__do_sys_newfstatat.do_syscall_64.entry_SYSCALL_64_after_hwframe
> 2.46 ± 7% -1.1 1.33 ± 2% perf-profile.calltrace.cycles-pp.__btrfs_release_delayed_node.btrfs_delayed_update_inode.btrfs_update_inode.btrfs_dirty_inode.btrfs_setattr
> 1.79 ± 11% -0.7 1.11 ± 6% perf-profile.calltrace.cycles-pp.link_path_walk.path_lookupat.filename_lookup.do_faccessat.do_syscall_64
> 1.57 ± 11% -0.7 0.91 ± 3% perf-profile.calltrace.cycles-pp.kmem_cache_alloc.prepare_creds.do_faccessat.do_syscall_64.entry_SYSCALL_64_after_hwframe
> 1.64 ± 9% -0.6 1.00 ± 4% perf-profile.calltrace.cycles-pp.user_path_at_empty.do_faccessat.do_syscall_64.entry_SYSCALL_64_after_hwframe
> 1.60 ± 9% -0.6 0.98 ± 4% perf-profile.calltrace.cycles-pp.getname_flags.user_path_at_empty.do_faccessat.do_syscall_64.entry_SYSCALL_64_after_hwframe
> 1.54 ± 8% -0.6 0.94 ± 3% perf-profile.calltrace.cycles-pp.__kmalloc.security_prepare_creds.prepare_creds.do_faccessat.do_syscall_64
> 1.21 ± 10% -0.4 0.77 ± 5% perf-profile.calltrace.cycles-pp.strncpy_from_user.getname_flags.user_path_at_empty.do_faccessat.do_syscall_64
> 1.00 ± 10% -0.4 0.63 ± 3% perf-profile.calltrace.cycles-pp.filename_lookup.vfs_statx.__do_sys_newfstatat.do_syscall_64.entry_SYSCALL_64_after_hwframe
> 0.95 ± 14% -0.4 0.58 ± 4% perf-profile.calltrace.cycles-pp.kmem_cache_free.do_faccessat.do_syscall_64.entry_SYSCALL_64_after_hwframe
> 0.95 ± 7% -0.3 0.61 ± 4% perf-profile.calltrace.cycles-pp.kfree.security_cred_free.put_cred_rcu.do_faccessat.do_syscall_64
> 0.91 ± 10% -0.3 0.57 ± 3% perf-profile.calltrace.cycles-pp.path_lookupat.filename_lookup.vfs_statx.__do_sys_newfstatat.do_syscall_64
> 0.00 +1.0 0.98 ± 4% perf-profile.calltrace.cycles-pp._find_next_bit.cpumask_next.__percpu_counter_sum.__reserve_bytes.btrfs_reserve_metadata_bytes
> 0.00 +1.6 1.56 ± 4% perf-profile.calltrace.cycles-pp.cpumask_next.__percpu_counter_sum.__reserve_bytes.btrfs_reserve_metadata_bytes.btrfs_block_rsv_add
> 0.00 +4.2 4.23 ± 4% perf-profile.calltrace.cycles-pp.__percpu_counter_sum.__reserve_bytes.btrfs_reserve_metadata_bytes.btrfs_block_rsv_add.start_transaction
> 0.00 +12.6 12.55 ± 4% perf-profile.calltrace.cycles-pp.native_queued_spin_lock_slowpath._raw_spin_lock.__reserve_bytes.btrfs_reserve_metadata_bytes.btrfs_block_rsv_add
> 0.00 +13.0 13.01 ± 4% perf-profile.calltrace.cycles-pp._raw_spin_lock.__reserve_bytes.btrfs_reserve_metadata_bytes.btrfs_block_rsv_add.start_transaction
> 0.00 +15.3 15.29 ± 3% perf-profile.calltrace.cycles-pp.native_queued_spin_lock_slowpath._raw_spin_lock.btrfs_block_rsv_release.btrfs_trans_release_metadata.__btrfs_end_transaction
> 0.00 +15.8 15.81 ± 3% perf-profile.calltrace.cycles-pp._raw_spin_lock.btrfs_block_rsv_release.btrfs_trans_release_metadata.__btrfs_end_transaction.btrfs_dirty_inode
> 0.00 +16.0 16.04 ± 3% perf-profile.calltrace.cycles-pp.btrfs_block_rsv_release.btrfs_trans_release_metadata.__btrfs_end_transaction.btrfs_dirty_inode.btrfs_setattr
> 0.00 +16.0 16.05 ± 3% perf-profile.calltrace.cycles-pp.btrfs_trans_release_metadata.__btrfs_end_transaction.btrfs_dirty_inode.btrfs_setattr.notify_change
> 0.63 ± 10% +16.7 17.34 ± 3% perf-profile.calltrace.cycles-pp.__btrfs_end_transaction.btrfs_dirty_inode.btrfs_setattr.notify_change.chmod_common
> 0.00 +18.3 18.27 ± 4% perf-profile.calltrace.cycles-pp.__reserve_bytes.btrfs_reserve_metadata_bytes.btrfs_block_rsv_add.start_transaction.btrfs_dirty_inode
> 0.00 +18.4 18.39 ± 4% perf-profile.calltrace.cycles-pp.btrfs_reserve_metadata_bytes.btrfs_block_rsv_add.start_transaction.btrfs_dirty_inode.btrfs_setattr
> 2.18 ± 12% +18.4 20.61 ± 4% perf-profile.calltrace.cycles-pp.start_transaction.btrfs_dirty_inode.btrfs_setattr.notify_change.chmod_common
> 0.00 +18.9 18.88 ± 4% perf-profile.calltrace.cycles-pp.btrfs_block_rsv_add.start_transaction.btrfs_dirty_inode.btrfs_setattr.notify_change
> 9.24 ± 10% +32.2 41.40 ± 3% perf-profile.calltrace.cycles-pp.__x64_sys_fchmod.do_syscall_64.entry_SYSCALL_64_after_hwframe
> 9.16 ± 10% +32.2 41.36 ± 3% perf-profile.calltrace.cycles-pp.chmod_common.__x64_sys_fchmod.do_syscall_64.entry_SYSCALL_64_after_hwframe
> 8.30 ± 9% +32.6 40.94 ± 3% perf-profile.calltrace.cycles-pp.notify_change.chmod_common.__x64_sys_fchmod.do_syscall_64.entry_SYSCALL_64_after_hwframe
> 8.09 ± 10% +32.7 40.80 ± 3% perf-profile.calltrace.cycles-pp.btrfs_setattr.notify_change.chmod_common.__x64_sys_fchmod.do_syscall_64
> 7.74 ± 9% +32.8 40.56 ± 4% perf-profile.calltrace.cycles-pp.btrfs_dirty_inode.btrfs_setattr.notify_change.chmod_common.__x64_sys_fchmod
> 47.72 ± 11% -27.3 20.41 ± 3% perf-profile.children.cycles-pp.do_faccessat
> 20.57 ± 11% -12.1 8.51 ± 3% perf-profile.children.cycles-pp.prepare_creds
> 18.81 ± 11% -11.9 6.93 ± 3% perf-profile.children.cycles-pp.put_cred_rcu
> 5.42 ± 12% -3.8 1.60 ± 3% perf-profile.children.cycles-pp.free_uid
> 5.39 ± 12% -3.8 1.58 ± 3% perf-profile.children.cycles-pp.refcount_dec_and_lock_irqsave
> 5.36 ± 12% -3.8 1.56 ± 3% perf-profile.children.cycles-pp.refcount_dec_not_one
> 5.34 ± 11% -3.1 2.21 ± 3% perf-profile.children.cycles-pp.key_put
> 5.18 ± 11% -2.4 2.75 ± 4% perf-profile.children.cycles-pp.security_prepare_creds
> 4.77 ± 8% -2.3 2.50 ± 4% perf-profile.children.cycles-pp.btrfs_update_inode
> 3.80 ± 7% -2.0 1.84 ± 4% perf-profile.children.cycles-pp.btrfs_delayed_update_inode
> 3.54 ± 12% -1.8 1.74 ± 4% perf-profile.children.cycles-pp.apparmor_cred_prepare
> 3.49 ± 9% -1.8 1.72 ± 6% perf-profile.children.cycles-pp.security_cred_free
> 4.39 ± 11% -1.7 2.68 ± 5% perf-profile.children.cycles-pp.filename_lookup
> 3.93 ± 11% -1.5 2.40 ± 5% perf-profile.children.cycles-pp.path_lookupat
> 2.50 ± 9% -1.4 1.09 ± 9% perf-profile.children.cycles-pp.apparmor_cred_free
> 3.26 ± 11% -1.3 1.96 ± 3% perf-profile.children.cycles-pp.__do_sys_newfstatat
> 2.90 ± 10% -1.1 1.75 ± 3% perf-profile.children.cycles-pp.vfs_statx
> 2.47 ± 7% -1.1 1.34 ± 3% perf-profile.children.cycles-pp.__btrfs_release_delayed_node
> 1.55 ± 11% -1.1 0.49 ± 7% perf-profile.children.cycles-pp.join_transaction
> 2.37 ± 11% -0.9 1.49 ± 6% perf-profile.children.cycles-pp.link_path_walk
> 2.11 ± 10% -0.9 1.23 ± 4% perf-profile.children.cycles-pp.kmem_cache_alloc
> 2.13 ± 9% -0.8 1.30 ± 4% perf-profile.children.cycles-pp.user_path_at_empty
> 2.08 ± 9% -0.8 1.29 ± 4% perf-profile.children.cycles-pp.getname_flags
> 1.17 ± 12% -0.7 0.50 ± 6% perf-profile.children.cycles-pp.common_perm_cond
> 1.58 ± 14% -0.7 0.92 ± 7% perf-profile.children.cycles-pp.inode_permission
> 1.10 ± 12% -0.6 0.46 ± 6% perf-profile.children.cycles-pp.common_perm
> 1.58 ± 9% -0.6 0.97 ± 3% perf-profile.children.cycles-pp.__kmalloc
> 1.56 ± 11% -0.6 0.99 ± 4% perf-profile.children.cycles-pp.strncpy_from_user
> 1.29 ± 14% -0.5 0.79 ± 5% perf-profile.children.cycles-pp.kmem_cache_free
> 1.10 ± 13% -0.5 0.62 ± 13% perf-profile.children.cycles-pp.mutex_lock
> 0.59 ± 10% -0.4 0.14 ± 16% perf-profile.children.cycles-pp.btrfs_get_or_create_delayed_node
> 0.57 ± 10% -0.4 0.14 ± 18% perf-profile.children.cycles-pp.btrfs_get_delayed_node
> 0.83 ± 13% -0.4 0.46 ± 4% perf-profile.children.cycles-pp.generic_permission
> 0.91 ± 10% -0.4 0.56 ± 6% perf-profile.children.cycles-pp.walk_component
> 0.96 ± 7% -0.4 0.61 ± 4% perf-profile.children.cycles-pp.kfree
> 0.60 ± 14% -0.3 0.26 ± 3% perf-profile.children.cycles-pp.security_path_chmod
> 0.65 ± 10% -0.3 0.31 ± 7% perf-profile.children.cycles-pp.vfs_getattr
> 0.64 ± 10% -0.3 0.30 ± 7% perf-profile.children.cycles-pp.security_inode_getattr
> 0.77 ± 12% -0.3 0.46 ± 6% perf-profile.children.cycles-pp.btrfs_update_root_times
> 0.69 ± 5% -0.3 0.39 ± 5% perf-profile.children.cycles-pp.mutex_unlock
> 0.65 ± 12% -0.3 0.39 ± 9% perf-profile.children.cycles-pp.syscall_return_via_sysret
> 0.70 ± 9% -0.3 0.44 ± 4% perf-profile.children.cycles-pp.__check_object_size
> 0.62 ± 12% -0.3 0.37 ± 3% perf-profile.children.cycles-pp.complete_walk
> 0.51 ± 12% -0.3 0.26 ± 5% perf-profile.children.cycles-pp.get_obj_cgroup_from_current
> 0.46 ± 31% -0.2 0.22 ± 16% perf-profile.children.cycles-pp.revert_creds
> 0.59 ± 12% -0.2 0.36 ± 3% perf-profile.children.cycles-pp.unlazy_walk
> 0.48 ± 11% -0.2 0.28 ± 5% perf-profile.children.cycles-pp.obj_cgroup_charge
> 0.58 ± 10% -0.2 0.38 ± 3% perf-profile.children.cycles-pp.btrfs_getattr
> 0.52 ± 10% -0.2 0.33 ± 9% perf-profile.children.cycles-pp.lookup_fast
> 0.47 ± 20% -0.2 0.29 ± 15% perf-profile.children.cycles-pp.btrfs_permission
> 0.33 ± 12% -0.2 0.15 ± 8% perf-profile.children.cycles-pp.capable_wrt_inode_uidgid
> 0.46 ± 12% -0.2 0.29 perf-profile.children.cycles-pp.__legitimize_path
> 0.32 ± 12% -0.2 0.14 ± 10% perf-profile.children.cycles-pp.security_capable
> 0.31 ± 12% -0.2 0.13 ± 11% perf-profile.children.cycles-pp.apparmor_capable
> 0.32 ± 12% -0.2 0.15 ± 8% perf-profile.children.cycles-pp.ns_capable_common
> 0.45 ± 9% -0.2 0.28 ± 10% perf-profile.children.cycles-pp.refill_obj_stock
> 0.28 ± 63% -0.2 0.12 ± 27% perf-profile.children.cycles-pp.map_id_up
> 0.35 ± 28% -0.1 0.20 ± 10% perf-profile.children.cycles-pp.cp_new_stat
> 0.42 ± 10% -0.1 0.28 ± 6% perf-profile.children.cycles-pp.__mod_memcg_lruvec_state
> 0.36 ± 10% -0.1 0.23 ± 8% perf-profile.children.cycles-pp.path_put
> 0.35 ± 10% -0.1 0.22 ± 11% perf-profile.children.cycles-pp.dput
> 0.35 ± 9% -0.1 0.22 ± 9% perf-profile.children.cycles-pp.__d_lookup_rcu
> 0.32 ± 10% -0.1 0.19 ± 12% perf-profile.children.cycles-pp.path_init
> 0.36 ± 14% -0.1 0.24 ± 5% perf-profile.children.cycles-pp.__entry_text_start
> 0.35 ± 11% -0.1 0.23 ± 9% perf-profile.children.cycles-pp.___might_sleep
> 0.32 ± 9% -0.1 0.20 ± 4% perf-profile.children.cycles-pp.__check_heap_object
> 0.27 ± 10% -0.1 0.16 ± 7% perf-profile.children.cycles-pp.__list_add_valid
> 0.26 ± 7% -0.1 0.16 ± 11% perf-profile.children.cycles-pp.__might_sleep
> 0.23 ± 15% -0.1 0.13 ± 5% perf-profile.children.cycles-pp._cond_resched
> 0.19 ± 39% -0.1 0.09 ± 7% perf-profile.children.cycles-pp.fill_stack_inode_item
> 0.23 ± 14% -0.1 0.14 ± 12% perf-profile.children.cycles-pp.syscall_enter_from_user_mode
> 0.23 ± 14% -0.1 0.15 ± 7% perf-profile.children.cycles-pp.__legitimize_mnt
> 0.18 ± 14% -0.1 0.10 ± 11% perf-profile.children.cycles-pp.override_creds
> 0.17 ± 15% -0.1 0.10 ± 11% perf-profile.children.cycles-pp.__list_del_entry_valid
> 0.18 ± 13% -0.1 0.10 ± 12% perf-profile.children.cycles-pp.step_into
> 0.19 ± 14% -0.1 0.12 ± 12% perf-profile.children.cycles-pp.lockref_get_not_dead
> 0.20 ± 10% -0.1 0.13 ± 12% perf-profile.children.cycles-pp.__mod_memcg_state
> 0.19 ± 16% -0.1 0.12 ± 11% perf-profile.children.cycles-pp.rcu_read_unlock_strict
> 0.15 ± 14% -0.1 0.09 ± 13% perf-profile.children.cycles-pp.lockref_put_or_lock
> 0.17 ± 11% -0.1 0.12 ± 3% perf-profile.children.cycles-pp.memset_erms
> 0.17 ± 17% -0.1 0.12 ± 7% perf-profile.children.cycles-pp.syscall_exit_to_user_mode
> 0.16 ± 7% -0.1 0.11 ± 4% perf-profile.children.cycles-pp._copy_to_user
> 0.10 ± 21% -0.1 0.04 ± 58% perf-profile.children.cycles-pp.mnt_want_write
> 0.11 ± 9% -0.0 0.07 ± 13% perf-profile.children.cycles-pp.inode_get_bytes
> 0.11 ± 18% -0.0 0.07 ± 13% perf-profile.children.cycles-pp.rcu_all_qs
> 0.11 ± 16% -0.0 0.06 ± 11% perf-profile.children.cycles-pp.security_inode_permission
> 0.10 -0.0 0.05 ± 8% perf-profile.children.cycles-pp.__fget_light
> 0.11 ± 13% -0.0 0.07 ± 7% perf-profile.children.cycles-pp.entry_SYSCALL_64_safe_stack
> 0.12 ± 12% -0.0 0.08 ± 8% perf-profile.children.cycles-pp.copy_user_enhanced_fast_string
> 0.10 ± 19% -0.0 0.07 ± 7% perf-profile.children.cycles-pp.__put_cred
> 0.11 ± 14% -0.0 0.07 ± 14% perf-profile.children.cycles-pp.btrfs_balance_delayed_items
> 0.09 ± 14% -0.0 0.06 ± 14% perf-profile.children.cycles-pp.exit_to_user_mode_prepare
> 0.10 ± 14% -0.0 0.08 ± 6% perf-profile.children.cycles-pp.__x86_indirect_thunk_rax
> 0.08 ± 10% -0.0 0.06 ± 15% perf-profile.children.cycles-pp.mntput_no_expire
> 0.21 ± 6% +0.1 0.28 ± 12% perf-profile.children.cycles-pp.btrfs_put_transaction
> 0.05 ± 61% +0.1 0.15 ± 9% perf-profile.children.cycles-pp._raw_spin_unlock_irqrestore
> 0.00 +0.2 0.21 ± 10% perf-profile.children.cycles-pp.find_next_bit
> 0.06 ± 17% +0.3 0.38 ± 4% perf-profile.children.cycles-pp._raw_spin_lock_irqsave
> 0.00 +0.4 0.43 ± 14% perf-profile.children.cycles-pp.btrfs_get_alloc_profile
> 0.00 +0.5 0.46 ± 14% perf-profile.children.cycles-pp.calc_available_free_space
> 0.00 +0.5 0.48 ± 2% perf-profile.children.cycles-pp.btrfs_block_rsv_add_bytes
> 0.00 +0.5 0.48 ± 8% perf-profile.children.cycles-pp.wait_current_trans
> 0.00 +1.0 1.00 ± 4% perf-profile.children.cycles-pp._find_next_bit
> 0.00 +1.8 1.77 ± 4% perf-profile.children.cycles-pp.cpumask_next
> 0.00 +4.2 4.24 ± 4% perf-profile.children.cycles-pp.__percpu_counter_sum
> 0.00 +16.0 16.04 ± 3% perf-profile.children.cycles-pp.btrfs_block_rsv_release
> 0.00 +16.0 16.05 ± 3% perf-profile.children.cycles-pp.btrfs_trans_release_metadata
> 0.64 ± 9% +16.7 17.35 ± 3% perf-profile.children.cycles-pp.__btrfs_end_transaction
> 0.00 +18.3 18.27 ± 4% perf-profile.children.cycles-pp.__reserve_bytes
> 0.00 +18.4 18.39 ± 4% perf-profile.children.cycles-pp.btrfs_reserve_metadata_bytes
> 2.19 ± 12% +18.4 20.61 ± 4% perf-profile.children.cycles-pp.start_transaction
> 0.00 +18.9 18.88 ± 4% perf-profile.children.cycles-pp.btrfs_block_rsv_add
> 0.75 ± 8% +27.1 27.88 ± 3% perf-profile.children.cycles-pp.native_queued_spin_lock_slowpath
> 2.32 ± 10% +28.3 30.66 ± 3% perf-profile.children.cycles-pp._raw_spin_lock
> 9.25 ± 10% +32.2 41.41 ± 3% perf-profile.children.cycles-pp.__x64_sys_fchmod
> 9.16 ± 10% +32.2 41.36 ± 3% perf-profile.children.cycles-pp.chmod_common
> 8.31 ± 9% +32.6 40.95 ± 3% perf-profile.children.cycles-pp.notify_change
> 8.10 ± 10% +32.7 40.80 ± 3% perf-profile.children.cycles-pp.btrfs_setattr
> 7.75 ± 9% +32.8 40.56 ± 4% perf-profile.children.cycles-pp.btrfs_dirty_inode
> 13.73 ± 11% -8.9 4.81 ± 4% perf-profile.self.cycles-pp.prepare_creds
> 5.33 ± 12% -3.8 1.55 ± 3% perf-profile.self.cycles-pp.refcount_dec_not_one
> 4.57 ± 11% -3.1 1.42 ± 4% perf-profile.self.cycles-pp.put_cred_rcu
> 5.30 ± 11% -3.1 2.19 ± 3% perf-profile.self.cycles-pp.key_put
> 3.53 ± 12% -1.8 1.73 ± 4% perf-profile.self.cycles-pp.apparmor_cred_prepare
> 2.48 ± 9% -1.4 1.08 ± 9% perf-profile.self.cycles-pp.apparmor_cred_free
> 1.10 ± 12% -0.6 0.45 ± 5% perf-profile.self.cycles-pp.common_perm
> 1.04 ± 14% -0.5 0.58 ± 13% perf-profile.self.cycles-pp.mutex_lock
> 0.57 ± 11% -0.4 0.13 ± 20% perf-profile.self.cycles-pp.btrfs_get_delayed_node
> 1.06 ± 9% -0.4 0.63 ± 5% perf-profile.self.cycles-pp.kmem_cache_alloc
> 1.02 ± 10% -0.4 0.64 ± 4% perf-profile.self.cycles-pp.link_path_walk
> 0.93 ± 14% -0.4 0.55 ± 5% perf-profile.self.cycles-pp.kmem_cache_free
> 0.79 ± 8% -0.3 0.48 ± 4% perf-profile.self.cycles-pp.__kmalloc
> 0.69 ± 5% -0.3 0.39 ± 6% perf-profile.self.cycles-pp.mutex_unlock
> 0.72 ± 11% -0.3 0.46 ± 5% perf-profile.self.cycles-pp.strncpy_from_user
> 0.65 ± 12% -0.3 0.39 ± 9% perf-profile.self.cycles-pp.syscall_return_via_sysret
> 0.46 ± 31% -0.2 0.22 ± 16% perf-profile.self.cycles-pp.revert_creds
> 0.64 ± 9% -0.2 0.40 ± 3% perf-profile.self.cycles-pp.kfree
> 0.60 ± 9% -0.2 0.38 ± 7% perf-profile.self.cycles-pp.join_transaction
> 0.41 ± 11% -0.2 0.22 ± 5% perf-profile.self.cycles-pp.get_obj_cgroup_from_current
> 0.45 ± 10% -0.2 0.27 ± 5% perf-profile.self.cycles-pp.obj_cgroup_charge
> 0.30 ± 13% -0.2 0.13 ± 11% perf-profile.self.cycles-pp.apparmor_capable
> 0.44 ± 20% -0.2 0.28 ± 16% perf-profile.self.cycles-pp.btrfs_permission
> 0.42 ± 11% -0.2 0.27 ± 8% perf-profile.self.cycles-pp.generic_permission
> 0.42 ± 8% -0.2 0.27 ± 10% perf-profile.self.cycles-pp.refill_obj_stock
> 0.47 ± 10% -0.2 0.32 ± 2% perf-profile.self.cycles-pp.btrfs_getattr
> 0.27 ± 65% -0.2 0.12 ± 25% perf-profile.self.cycles-pp.map_id_up
> 0.36 ± 14% -0.1 0.23 ± 4% perf-profile.self.cycles-pp.__entry_text_start
> 0.34 ± 10% -0.1 0.22 ± 9% perf-profile.self.cycles-pp.__d_lookup_rcu
> 0.38 ± 11% -0.1 0.25 ± 5% perf-profile.self.cycles-pp.do_faccessat
> 0.32 ± 19% -0.1 0.20 ± 13% perf-profile.self.cycles-pp.inode_permission
> 0.34 ± 13% -0.1 0.22 ± 9% perf-profile.self.cycles-pp.___might_sleep
> 0.31 ± 9% -0.1 0.20 ± 4% perf-profile.self.cycles-pp.__check_heap_object
> 0.27 ± 10% -0.1 0.16 ± 7% perf-profile.self.cycles-pp.__list_add_valid
> 0.28 ± 11% -0.1 0.17 ± 11% perf-profile.self.cycles-pp.path_init
> 0.25 ± 8% -0.1 0.15 ± 10% perf-profile.self.cycles-pp.__might_sleep
> 0.26 ± 8% -0.1 0.16 ± 7% perf-profile.self.cycles-pp.__check_object_size
> 0.23 ± 16% -0.1 0.13 ± 13% perf-profile.self.cycles-pp.syscall_enter_from_user_mode
> 0.17 ± 16% -0.1 0.09 ± 7% perf-profile.self.cycles-pp.override_creds
> 0.22 ± 15% -0.1 0.14 ± 8% perf-profile.self.cycles-pp.__legitimize_mnt
> 0.20 ± 13% -0.1 0.12 ± 12% perf-profile.self.cycles-pp.entry_SYSCALL_64_after_hwframe
> 0.14 ± 18% -0.1 0.06 perf-profile.self.cycles-pp.btrfs_update_inode
> 0.21 ± 13% -0.1 0.13 ± 5% perf-profile.self.cycles-pp.walk_component
> 0.17 ± 11% -0.1 0.10 ± 11% perf-profile.self.cycles-pp.step_into
> 0.17 ± 17% -0.1 0.10 ± 11% perf-profile.self.cycles-pp.__list_del_entry_valid
> 0.19 ± 14% -0.1 0.12 ± 12% perf-profile.self.cycles-pp.lockref_get_not_dead
> 0.20 ± 10% -0.1 0.13 ± 12% perf-profile.self.cycles-pp.__mod_memcg_state
> 0.16 ± 10% -0.1 0.10 ± 11% perf-profile.self.cycles-pp.lookup_fast
> 0.15 ± 14% -0.1 0.08 ± 13% perf-profile.self.cycles-pp.lockref_put_or_lock
> 0.20 ± 10% -0.1 0.14 ± 5% perf-profile.self.cycles-pp.__mod_memcg_lruvec_state
> 0.15 ± 14% -0.1 0.08 ± 10% perf-profile.self.cycles-pp.filename_lookup
> 0.17 ± 9% -0.1 0.11 ± 3% perf-profile.self.cycles-pp.memset_erms
> 0.14 ± 12% -0.1 0.08 ± 5% perf-profile.self.cycles-pp.getname_flags
> 0.07 ± 11% -0.0 0.03 ±100% perf-profile.self.cycles-pp.dput
> 0.11 ± 16% -0.0 0.06 ± 11% perf-profile.self.cycles-pp.security_inode_permission
> 0.15 ± 15% -0.0 0.10 ± 14% perf-profile.self.cycles-pp.rcu_read_unlock_strict
> 0.12 ± 12% -0.0 0.08 ± 10% perf-profile.self.cycles-pp.copy_user_enhanced_fast_string
> 0.11 ± 11% -0.0 0.06 ± 13% perf-profile.self.cycles-pp._cond_resched
> 0.11 ± 13% -0.0 0.07 ± 7% perf-profile.self.cycles-pp.entry_SYSCALL_64_safe_stack
> 0.10 ± 5% -0.0 0.05 ± 8% perf-profile.self.cycles-pp.__fget_light
> 0.10 ± 19% -0.0 0.07 ± 13% perf-profile.self.cycles-pp.path_lookupat
> 0.11 ± 14% -0.0 0.07 ± 20% perf-profile.self.cycles-pp.btrfs_balance_delayed_items
> 0.10 ± 14% -0.0 0.07 ± 10% perf-profile.self.cycles-pp.__virt_addr_valid
> 0.10 ± 21% -0.0 0.06 ± 6% perf-profile.self.cycles-pp.__put_cred
> 0.07 ± 11% -0.0 0.04 ± 60% perf-profile.self.cycles-pp.exit_to_user_mode_prepare
> 0.09 ± 20% -0.0 0.06 ± 17% perf-profile.self.cycles-pp.notify_change
> 0.07 ± 12% -0.0 0.05 ± 8% perf-profile.self.cycles-pp.mntput_no_expire
> 0.21 ± 6% +0.1 0.28 ± 12% perf-profile.self.cycles-pp.btrfs_put_transaction
> 0.05 ± 62% +0.1 0.13 ± 11% perf-profile.self.cycles-pp._raw_spin_unlock_irqrestore
> 0.00 +0.1 0.12 ± 5% perf-profile.self.cycles-pp.btrfs_reserve_metadata_bytes
> 0.00 +0.1 0.14 ± 13% perf-profile.self.cycles-pp.btrfs_block_rsv_release
> 0.00 +0.2 0.16 ± 18% perf-profile.self.cycles-pp.btrfs_get_alloc_profile
> 0.00 +0.2 0.18 ± 7% perf-profile.self.cycles-pp.wait_current_trans
> 0.46 ± 15% +0.2 0.64 ± 6% perf-profile.self.cycles-pp.start_transaction
> 0.00 +0.2 0.21 ± 10% perf-profile.self.cycles-pp.find_next_bit
> 0.06 ± 20% +0.3 0.38 ± 4% perf-profile.self.cycles-pp._raw_spin_lock_irqsave
> 0.00 +0.6 0.57 ± 14% perf-profile.self.cycles-pp.__reserve_bytes
> 0.00 +0.6 0.57 ± 7% perf-profile.self.cycles-pp.cpumask_next
> 0.36 ± 12% +0.6 0.98 ± 11% perf-profile.self.cycles-pp.__btrfs_end_transaction
> 0.00 +1.0 0.99 ± 4% perf-profile.self.cycles-pp._find_next_bit
> 1.57 ± 11% +1.2 2.77 ± 6% perf-profile.self.cycles-pp._raw_spin_lock
> 0.00 +2.1 2.08 ± 4% perf-profile.self.cycles-pp.__percpu_counter_sum
> 0.73 ± 8% +27.1 27.79 ± 3% perf-profile.self.cycles-pp.native_queued_spin_lock_slowpath
>
>
>
> stress-ng.access.ops
>
> 1.2e+06 +-----------------------------------------------------------------+
> | +..+..+..+.. .+..+..+. .+.. .+..+..+..+..+..+..+ |
> 1e+06 |-+ : +. +. +. |
> | : |
> | : |
> 800000 |-+ : |
> | : O O O O O O O O O O O O |
> 600000 |-+O :O O O O O O O O |
> | : |
> 400000 |-+ : |
> | : |
> | : |
> 200000 |-+: |
> | : |
> 0 +-----------------------------------------------------------------+
>
>
> stress-ng.access.ops_per_sec
>
> 40000 +-------------------------------------------------------------------+
> | +..+..+..+... .+..+..+. .+.. .+..+...+..+..+..+..+ |
> 35000 |-+ : +. +. +. |
> 30000 |-+ : |
> | : |
> 25000 |-+ : |
> | : O O O O O O O O O O O O |
> 20000 |-+O :O O O O O O O O |
> | : |
> 15000 |-+ : |
> 10000 |-+ : |
> | : |
> 5000 |-+: |
> | : |
> 0 +-------------------------------------------------------------------+
>
>
> stress-ng.chmod.ops
>
> 140000 +------------------------------------------------------------------+
> | +.. |
> 120000 |-+ : +..+.. .+.. |
> | : +.. .. +. +.. +.. +.. +.. |
> 100000 |-+ : + ..+.. .. .. .. +.. |
> | : +. + + + +..+..+ |
> 80000 |-+ : |
> | : |
> 60000 |-+ : O O O |
> | O: O O O O O O O O O O O O O O O O O |
> 40000 |-+ : |
> | : |
> 20000 |-+: |
> | : |
> 0 +------------------------------------------------------------------+
>
>
> stress-ng.chmod.ops_per_sec
>
> 4500 +--------------------------------------------------------------------+
> | +.. +.. .+.. |
> 4000 |-+ : + +..+. +.. +.. |
> 3500 |-+ : +... + .+.. .+.. + |
> | : + +...+..+. +. + +... .+..+ |
> 3000 |-+ : + +. |
> 2500 |-+ : |
> | : |
> 2000 |-+ : O O O O O O O |
> 1500 |-+O: O O O O O O O O O O O O O |
> | : |
> 1000 |-+ : |
> 500 |-+: |
> | : |
> 0 +--------------------------------------------------------------------+
>
>
> stress-ng.chown.ops
>
> 1.2e+06 +-----------------------------------------------------------------+
> | +..+..+.. .+.. +.. |
> 1e+06 |-+ : +. +.. .+.. .. .+..+.. .+.. |
> | : +. + +..+..+..+. +. .+ |
> | : +. |
> 800000 |-+ : |
> | : |
> 600000 |-+O :O O O O O O O O |
> | : O O O O O O O O O O O O |
> 400000 |-+ : |
> | : |
> | : |
> 200000 |-+: |
> | : |
> 0 +-----------------------------------------------------------------+
>
>
> stress-ng.chown.ops_per_sec
>
> 40000 +-------------------------------------------------------------------+
> | +..+..+.. ..+.. +.. |
> 35000 |-+ : +. +.. .+.. .. .+...+.. .+.. |
> 30000 |-+ : +. + +..+..+..+. +. .+ |
> | : +. |
> 25000 |-+ : |
> | : |
> 20000 |-+O :O O O O O O O O |
> | : O O O O O O O O O O O O |
> 15000 |-+ : |
> 10000 |-+ : |
> | : |
> 5000 |-+: |
> | : |
> 0 +-------------------------------------------------------------------+
>
>
> stress-ng.utime.ops
>
> 4.5e+06 +-----------------------------------------------------------------+
> | .+..+.. .+.. .+.. .+.. |
> 4e+06 |-+ +..+. +. +. +. .+..+..+..+.. .+ |
> 3.5e+06 |-+ : +..+..+..+. +. |
> | : |
> 3e+06 |-+ : |
> 2.5e+06 |-+ : |
> | : |
> 2e+06 |-+ : |
> 1.5e+06 |-+ : |
> | : O O O O O |
> 1e+06 |-+O: O O O O O O O O O O O O O O O |
> 500000 |-+ : |
> | : |
> 0 +-----------------------------------------------------------------+
>
>
> stress-ng.utime.ops_per_sec
>
> 160000 +------------------------------------------------------------------+
> | .+.. +.. |
> 140000 |-+ .+. +.. .. .+.. ..+.. |
> 120000 |-+ +. + +. +. .+.. .+..+..+..+..+.. .+ |
> | : +. +. +. |
> 100000 |-+ : |
> | : |
> 80000 |-+ : |
> | : |
> 60000 |-+ : |
> 40000 |-+ : |
> | O: O O O O O O O O O O O O O O O O O O O O |
> 20000 |-+ : |
> | : |
> 0 +------------------------------------------------------------------+
>
>
> [*] bisect-good sample
> [O] bisect-bad sample
>
>
>
> 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.
>
>
> Thanks,
> Oliver Sang
>