LinuxLists.cc - [PATCH] sched/numa: Correct NUMA imbalance calculation

2024-05-24 03:56:22

Subject: [PATCH] sched/numa: Correct NUMA imbalance calculation

When perform load balance, a NUMA imbalance is allowed
if busy CPUs is less than the maximum threshold, it
remains a pair of communication tasks on the current
node when the source doamin is lightly loaded. In many
cases, this prevents communicating tasks being pulled apart.

But when I ran the lmbench bw_pipe testcase, I found that
it was a little inconsistent with the above expectations,
the communicating tasks were migrated to two different
NUMA nodes.

There may be two reasons for this issue:
1. calculate_imbalance() use local->sum_nr_running, it
may not be accurate, because the communication tasks run
on busiest group, it should be busiest->sum_nr_running.

2. In calculate_imbalance(), idles cpus are used to calculat
imbalance, but the group_weight may not be equal between local
and busiest group(My server has 4 NUMA nodes and kernel
builds 3 level NUMA sched_domain, some sched_group's weight
is different). In this case, even if both groups are very idle,
imbalance will be calculated very large, the difference of busy
cpus between groups might be more appropriate as imbalance value.

For lmbench bw_pipe(bw_pipe -P 1):
v6.6: 1776.7533 MB/sec
v6.6 + this patch: 4323 MB/sec

Signed-off-by: Zhang Qiao <[email protected]>
---
kernel/sched/fair.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 03be0d1330a6..c6170cde9c14 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -1323,7 +1323,6 @@ static inline bool is_core_idle(int cpu)
}

#ifdef CONFIG_NUMA
-#define NUMA_IMBALANCE_MIN 2

static inline long
adjust_numa_imbalance(int imbalance, int dst_running, int imb_numa_nr)
@@ -1342,7 +1341,7 @@ adjust_numa_imbalance(int imbalance, int dst_running, int imb_numa_nr)
* Allow a small imbalance based on a simple pair of communicating
* tasks that remain local when the destination is lightly loaded.
*/
- if (imbalance <= NUMA_IMBALANCE_MIN)
+ if (imbalance <= imb_numa_nr)
return 0;

return imbalance;
@@ -10727,14 +10726,15 @@ static inline void calculate_imbalance(struct lb_env *env, struct sd_lb_stats *s
*/
env->migration_type = migrate_task;
env->imbalance = max_t(long, 0,
- (local->idle_cpus - busiest->idle_cpus));
+ (busiest->group_weight - busiest->idle_cpus) -
+ (local->group_weight - local->idle_cpus));
}

#ifdef CONFIG_NUMA
/* Consider allowing a small imbalance between NUMA groups */
if (env->sd->flags & SD_NUMA) {
env->imbalance = adjust_numa_imbalance(env->imbalance,
- local->sum_nr_running + 1,
+ busiest->sum_nr_running,
env->sd->imb_numa_nr);
}
#endif
--
2.18.0.huawei.25

2024-06-03 07:28:36

by kernel test robot

[permalink] [raw]

Subject: Re: [PATCH] sched/numa: Correct NUMA imbalance calculation

Hello,

kernel test robot

commit: 6efc66e7c7874a2852 url:
Details are as below:
--------------------------

The kernel config
noticed a -40.4% regression of unixbench.throughput on:
9068c203fdb7c1be61036a ("[PATCH] sched/numa: Correct NUMA imbalance calculation")
hub.com/intel-lab-lkp/linux/commits/Zhang-Qiao/sched-numa-Correct-NUMA-imbalance-calculation/20240524-120507">https://github.com/intel-lab-lkp/linux/commits/Zhang-Qiao/sched-numa-Correct-NUMA-imbalance-calculation/20240524-120507
t.kernel.org/cgit/linux/kernel/git/tip/tip.git">https://git.kernel.org/cgit/linux/kernel/git/tip/tip.git 97450eb909658573dcacc1063b06d3d08642c0c1
s://lore.kernel.org/all/20240524035438.2701479-1-zhangqiao22@huawei.com/">https://lore.kernel.org/all/[email protected]/
sched/numa: Correct NUMA imbalance calculation
threads 2 sockets Intel(R) Xeon(R) Platinum 8480CTDX (Sapphire Rapids) with 512G memory
the commit also has significant impact on the following tests:
----------------------------------------------------------------------------------------------+
| unixbench: unixbench.throughput -6.8% regression |
| 224 threads 2 sockets Intel(R) Xeon(R) Platinum 8480CTDX (Sapphire Rapids) with 256G memory |
| cpufreq_governor=performance |
|
|
|
----------------------------------------------------------------------------------------------+
| unixbench: unixbench.throughput -26.7% regression |
| 224 threads 4 sockets Intel(R) Xeon(R) Platinum 8380H CPU @ 2.90GHz (Cooper Lake) with 192G memory |
| cpufreq_governor=performance |
|
|
|
----------------------------------------------------------------------------------------------+
in a separate patch/commit (i.e. not just a new version of
kindly add following tags
test robot <[email protected]>
//lore.kernel.org/oe-lkp/202406031516.a1956bdc-oliver.sang@intel.com">https://lore.kernel.org/oe-lkp/[email protected]
------------------------------------------------------------------------>
and materials to reproduce are available at:
.01.org/0day-ci/archive/20240603/202406031516.a1956bdc-oliver.sang@intel.com">https://download.01.org/0day-ci/archive/20240603/[email protected]
===============================================================
kconfig/nr_task/rootfs/runtime/tbox_group/test/testcase:
4-rhel-8.3/100%/debian-12-x86_64-20240206.cgz/300s/lkp-spr-2sp4/fsdisk-w/unixbench
Remove shift of thermal clock")
Correct NUMA imbalance calculation")
6efc66e7c7874a28529068c203f
---------------------------
%stddev
\
-25.8% 2315045 ? 2% numa-meminfo.node1.MemUsed
137820 ? 40% numa-numastat.node1.other_node
137820 ? 40% numa-vmstat.node1.numa_other
-35.8% 115.00 ? 6% perf-c2c.DRAM.remote
68.67 ? 13% perf-c2c.HITM.remote
+1.7% 41238 proc-vmstat.nr_slab_reclaimable
50238 ? 9% proc-vmstat.pgactivate
0.50 mpstat.cpu.all.irq%
0.02 ? 2% mpstat.cpu.all.soft%
1.72 mpstat.cpu.all.usr%
-40.5% 106.88 ? 4% sched_debug.cfs_rq:/.util_est.avg
-22.9% 377.95 ? 5% sched_debug.cfs_rq:/.util_est.max
19.98 ? 34% sched_debug.cfs_rq:/.util_est.min
-40.4% 1.828e+08 ? 4% unixbench.throughput
+2.2% 285832 unixbench.time.involuntary_context_switches
1356 unixbench.time.user_time
-40.4% 6.781e+10 ? 4% unixbench.workload
1.84 ? 18% perf-stat.i.MPKI
-42.2% 1.261e+10 ? 5% perf-stat.i.branch-instructions
41.57 ? 7% perf-stat.i.cache-miss-rate%
-85.5% 1.139e+08 ? 32% perf-stat.i.cache-misses
-79.6% 2.024e+08 ? 22% perf-stat.i.cache-references
2389 perf-stat.i.context-switches
7.40 ? 4% perf-stat.i.cpi
+1.0% 5.174e+11 perf-stat.i.cpu-cycles
-2.5% 258.31 perf-stat.i.cpu-migrations
8109 ? 20% perf-stat.i.cycles-between-cache-misses
-42.2% 6.159e+10 ? 5% perf-stat.i.instructions
0.22 ? 3% perf-stat.i.ipc
0.09 ? 16% perf-stat.i.major-faults
1.81 ? 26% perf-stat.overall.MPKI
55.01 ? 9% perf-stat.overall.cache-miss-rate%
8.44 ? 5% perf-stat.overall.cpi
5049 ? 29% perf-stat.overall.cycles-between-cache-misses
0.12 ? 4% perf-stat.overall.ipc
-2.7% 340.75 perf-stat.overall.path-length
-42.0% 1.27e+10 ? 4% perf-stat.ps.branch-instructions
-85.8% 1.133e+08 ? 30% perf-stat.ps.cache-misses
-79.8% 2.02e+08 ? 21% perf-stat.ps.cache-references
+1.4% 5.225e+11 perf-stat.ps.cpu-cycles
-2.6% 253.24 perf-stat.ps.cpu-migrations
-42.0% 6.204e+10 ? 4% perf-stat.ps.instructions
0.09 ? 17% perf-stat.ps.major-faults
-42.0% 2.311e+13 ? 5% perf-stat.total.instructions
52.69 perf-profile.calltrace.cycles-pp.folio_unlock.simple_write_end.generic_perform_write.generic_file_write_iter.vfs_write
0.60 ? 61% perf-profile.calltrace.cycles-pp.entry_SYSCALL_64.write
0.90 ? 14% perf-profile.calltrace.cycles-pp.__generic_file_write_iter.generic_file_write_iter.vfs_write.ksys_write.do_syscall_64
4.56 ? 6% perf-profile.calltrace.cycles-pp.simple_write_begin.generic_perform_write.generic_file_write_iter.vfs_write.ksys_write
0.50 ? 45% perf-profile.calltrace.cycles-pp.fault_in_readable.fault_in_iov_iter_readable.generic_perform_write.generic_file_write_iter.vfs_write
0.64 ? 10% perf-profile.calltrace.cycles-pp.fault_in_iov_iter_readable.generic_perform_write.generic_file_write_iter.vfs_write.ksys_write
1.09 ? 3% perf-profile.calltrace.cycles-pp.rw_verify_area.vfs_write.ksys_write.do_syscall_64.entry_SYSCALL_64_after_hwframe
1.02 ? 2% perf-profile.calltrace.cycles-pp.security_file_permission.rw_verify_area.vfs_write.ksys_write.do_syscall_64
0.94 perf-profile.calltrace.cycles-pp.apparmor_file_permission.security_file_permission.rw_verify_area.vfs_write.ksys_write
2.74 perf-profile.calltrace.cycles-pp.folio_mark_dirty.simple_write_end.generic_perform_write.generic_file_write_iter.vfs_write
99.37 perf-profile.calltrace.cycles-pp.write
97.10 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe.write
96.99 perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.write
96.47 perf-profile.calltrace.cycles-pp.ksys_write.do_syscall_64.entry_SYSCALL_64_after_hwframe.write
96.03 perf-profile.calltrace.cycles-pp.vfs_write.ksys_write.do_syscall_64.entry_SYSCALL_64_after_hwframe.write
93.98 perf-profile.calltrace.cycles-pp.generic_file_write_iter.vfs_write.ksys_write.do_syscall_64.entry_SYSCALL_64_after_hwframe
2.90 ? 9% perf-profile.calltrace.cycles-pp.down_write.generic_file_write_iter.vfs_write.ksys_write.do_syscall_64
23.52 perf-profile.calltrace.cycles-pp.copy_page_from_iter_atomic.generic_perform_write.generic_file_write_iter.vfs_write.ksys_write
52.73 perf-profile.children.cycles-pp.folio_unlock
0.92 ? 14% perf-profile.children.cycles-pp.__generic_file_write_iter
0.64 ? 5% perf-profile.children.cycles-pp.sysvec_apic_timer_interrupt
0.58 ? 6% perf-profile.children.cycles-pp.__sysvec_apic_timer_interrupt
4.57 ? 6% perf-profile.children.cycles-pp.simple_write_begin
0.57 ? 6% perf-profile.children.cycles-pp.hrtimer_interrupt
0.45 ? 5% perf-profile.children.cycles-pp.__hrtimer_run_queues
4.50 ? 6% perf-profile.children.cycles-pp.__filemap_get_folio
0.43 ? 5% perf-profile.children.cycles-pp.tick_nohz_handler
0.84 ? 5% perf-profile.children.cycles-pp.asm_sysvec_apic_timer_interrupt
0.58 ? 14% perf-profile.children.cycles-pp.entry_SYSCALL_64
0.41 ? 4% perf-profile.children.cycles-pp.update_process_times
0.50 ? 15% perf-profile.children.cycles-pp.file_remove_privs_flags
0.71 ? 9% perf-profile.children.cycles-pp.fault_in_iov_iter_readable
0.66 ? 9% perf-profile.children.cycles-pp.fault_in_readable
0.30 ? 2% perf-profile.children.cycles-pp.sched_tick
0.30 ? 17% perf-profile.children.cycles-pp.__cond_resched
0.40 ? 12% perf-profile.children.cycles-pp.__fsnotify_parent
0.31 ? 14% perf-profile.children.cycles-pp.security_inode_need_killpriv
0.30 ? 16% perf-profile.children.cycles-pp.entry_SYSRETQ_unsafe_stack
0.26 ? 15% perf-profile.children.cycles-pp.cap_inode_need_killpriv
0.35 ? 13% perf-profile.children.cycles-pp.file_update_time
0.24 ? 14% perf-profile.children.cycles-pp.__vfs_getxattr
0.22 ? 13% perf-profile.children.cycles-pp.up_write
0.16 ? 15% perf-profile.children.cycles-pp.rcu_all_qs
0.31 ? 13% perf-profile.children.cycles-pp.inode_needs_update_time
0.32 ? 2% perf-profile.children.cycles-pp.__fdget_pos
0.16 ? 15% perf-profile.children.cycles-pp.generic_write_checks
0.20 ? 3% perf-profile.children.cycles-pp.task_tick_fair
0.10 ? 16% perf-profile.children.cycles-pp.strcmp
0.10 ? 16% perf-profile.children.cycles-pp.balance_dirty_pages_ratelimited_flags
0.27 ? 6% perf-profile.children.cycles-pp.folio_mapping
0.08 ? 17% perf-profile.children.cycles-pp.folio_wait_stable
0.08 ? 14% perf-profile.children.cycles-pp.timestamp_truncate
0.03 ? 70% perf-profile.children.cycles-pp.update_load_avg
0.05 ? 45% perf-profile.children.cycles-pp.entry_SYSCALL_64_safe_stack
0.08 ? 12% perf-profile.children.cycles-pp.xattr_resolve_name
0.30 ? 2% perf-profile.children.cycles-pp.w_test
0.10 ? 11% perf-profile.children.cycles-pp.aa_file_perm
0.08 ? 12% perf-profile.children.cycles-pp.generic_write_check_limits
0.10 ? 14% perf-profile.children.cycles-pp.xas_start
0.05 ? 46% perf-profile.children.cycles-pp.setattr_should_drop_suidgid
0.04 ? 71% perf-profile.children.cycles-pp.inode_to_bdi
0.45 perf-profile.children.cycles-pp.noop_dirty_folio
0.36 ? 2% perf-profile.children.cycles-pp.syscall_return_via_sysret
0.10 ? 12% perf-profile.children.cycles-pp.task_work_run
0.09 ? 11% perf-profile.children.cycles-pp.task_mm_cid_work
0.71 ? 2% perf-profile.children.cycles-pp.write@plt
1.11 ? 2% perf-profile.children.cycles-pp.rw_verify_area
1.05 ? 2% perf-profile.children.cycles-pp.security_file_permission
0.96 ? 2% perf-profile.children.cycles-pp.apparmor_file_permission
2.26 perf-profile.children.cycles-pp.folio_mark_dirty
97.50 perf-profile.children.cycles-pp.entry_SYSCALL_64_after_hwframe
97.41 perf-profile.children.cycles-pp.do_syscall_64
96.78 perf-profile.children.cycles-pp.ksys_write
96.36 perf-profile.children.cycles-pp.vfs_write
94.02 perf-profile.children.cycles-pp.generic_file_write_iter
2.92 ? 9% perf-profile.children.cycles-pp.down_write
23.77 perf-profile.children.cycles-pp.copy_page_from_iter_atomic
0.56 ? 12% perf-profile.self.cycles-pp.write
0.51 ? 12% perf-profile.self.cycles-pp.vfs_write
0.64 ? 9% perf-profile.self.cycles-pp.fault_in_readable
0.39 ? 16% perf-profile.self.cycles-pp.__filemap_get_folio
0.39 ? 12% perf-profile.self.cycles-pp.__fsnotify_parent
0.30 ? 15% perf-profile.self.cycles-pp.entry_SYSRETQ_unsafe_stack
0.22 ? 12% perf-profile.self.cycles-pp.up_write
0.16 ? 19% perf-profile.self.cycles-pp.__cond_resched
0.31 ? 3% perf-profile.self.cycles-pp.__fdget_pos
0.14 ? 15% perf-profile.self.cycles-pp.file_remove_privs_flags
0.11 ? 17% perf-profile.self.cycles-pp.inode_needs_update_time
0.13 ? 15% perf-profile.self.cycles-pp.entry_SYSCALL_64
0.13 ? 16% perf-profile.self.cycles-pp.generic_file_write_iter
0.10 ? 15% perf-profile.self.cycles-pp.rcu_all_qs
0.13 ? 9% perf-profile.self.cycles-pp.folio_mapping
0.10 ? 16% perf-profile.self.cycles-pp.__vfs_getxattr
0.10 ? 16% perf-profile.self.cycles-pp.entry_SYSCALL_64_after_hwframe
0.19 ? 7% perf-profile.self.cycles-pp.do_syscall_64
0.09 ? 14% perf-profile.self.cycles-pp.generic_write_checks
0.10 ? 16% perf-profile.self.cycles-pp.ksys_write
0.07 ? 12% perf-profile.self.cycles-pp.__generic_file_write_iter
0.04 ? 71% perf-profile.self.cycles-pp.file_update_time
0.02 ? 99% perf-profile.self.cycles-pp.setattr_should_drop_suidgid
0.05 ? 45% perf-profile.self.cycles-pp.entry_SYSCALL_64_safe_stack
0.08 ? 12% perf-profile.self.cycles-pp.strcmp
0.06 ? 46% perf-profile.self.cycles-pp.balance_dirty_pages_ratelimited_flags
0.07 ? 16% perf-profile.self.cycles-pp.simple_write_begin
0.04 ? 71% perf-profile.self.cycles-pp.fault_in_iov_iter_readable
0.06 ? 14% perf-profile.self.cycles-pp.timestamp_truncate
0.10 ? 11% perf-profile.self.cycles-pp.security_file_permission
0.21 ? 7% perf-profile.self.cycles-pp.xas_load
0.06 ? 11% perf-profile.self.cycles-pp.syscall_exit_to_user_mode
0.06 ? 14% perf-profile.self.cycles-pp.rw_verify_area
0.05 ? 47% perf-profile.self.cycles-pp.security_inode_need_killpriv
0.09 ? 13% perf-profile.self.cycles-pp.aa_file_perm
0.06 ? 14% perf-profile.self.cycles-pp.generic_write_check_limits
0.10 ? 12% perf-profile.self.cycles-pp.xas_start
0.24 ? 4% perf-profile.self.cycles-pp.w_test
0.15 ? 4% perf-profile.self.cycles-pp.syscall_exit_to_user_mode_prepare
0.43 perf-profile.self.cycles-pp.noop_dirty_folio
0.36 ? 2% perf-profile.self.cycles-pp.syscall_return_via_sysret
0.09 ? 14% perf-profile.self.cycles-pp.task_mm_cid_work
0.68 ? 3% perf-profile.self.cycles-pp.write@plt
0.84 perf-profile.self.cycles-pp.apparmor_file_permission
1.52 ? 2% perf-profile.self.cycles-pp.folio_mark_dirty
4.92 perf-profile.self.cycles-pp.simple_write_end
2.83 ? 9% perf-profile.self.cycles-pp.down_write
23.60 perf-profile.self.cycles-pp.copy_page_from_iter_atomic
*************************************************************************
threads 2 sockets Intel(R) Xeon(R) Platinum 8480CTDX (Sapphire Rapids) with 256G memory
===============================================================
kconfig/nr_task/rootfs/runtime/tbox_group/test/testcase:
4-rhel-8.3/100%/debian-12-x86_64-20240206.cgz/300s/lkp-spr-r02/fstime/unixbench
Remove shift of thermal clock")
Correct NUMA imbalance calculation")
6efc66e7c7874a28529068c203f
---------------------------
%stddev
\
4.03 mpstat.cpu.all.usr%
31506 ? 46% numa-meminfo.node0.Mapped
38178 ? 6% perf-c2c.DRAM.local
20527 ? 10% perf-c2c.DRAM.remote
1091 ? 6% perf-c2c.HITM.local
+75.8% 375.35 ? 16% sched_debug.cfs_rq:/.util_est.min
36281 ? 32% sched_debug.cpu.nr_switches.max
3523 ? 20% sched_debug.cpu.nr_switches.stddev
-6.8% 351324 unixbench.score
-6.8% 1.391e+08 unixbench.throughput
4261 unixbench.time.user_time
-6.8% 6.694e+10 unixbench.workload
5.63 perf-stat.i.MPKI
-8.3% 6.3e+10 perf-stat.i.branch-instructions
52.98 perf-stat.i.cache-miss-rate%
-16.1% 2.153e+09 perf-stat.i.cache-misses
-14.6% 3.186e+09 perf-stat.i.cache-references
1.50 perf-stat.i.cpi
+1.7% 4.193e+11 perf-stat.i.cpu-cycles
+10.4% 556.41 ? 3% perf-stat.i.cycles-between-cache-misses
-8.3% 3.193e+11 perf-stat.i.instructions
0.74 perf-stat.i.ipc
1.01 ?100% perf-stat.i.metric.K/sec
6.75 perf-stat.overall.MPKI
67.67 perf-stat.overall.cache-miss-rate%
1.31 perf-stat.overall.cpi
+21.2% 194.69 perf-stat.overall.cycles-between-cache-misses
0.76 perf-stat.overall.ipc
2304 perf-stat.overall.path-length
-8.0% 6.309e+10 perf-stat.ps.branch-instructions
-15.8% 2.158e+09 perf-stat.ps.cache-misses
-14.3% 3.189e+09 perf-stat.ps.cache-references
+2.0% 4.202e+11 perf-stat.ps.cpu-cycles
-8.0% 3.198e+11 perf-stat.ps.instructions
-7.9% 1.542e+14 perf-stat.total.instructions
2.98 perf-profile.calltrace.cycles-pp.__generic_file_write_iter.generic_file_write_iter.vfs_write.ksys_write.do_syscall_64
4.89 perf-profile.calltrace.cycles-pp.simple_write_begin.generic_perform_write.generic_file_write_iter.vfs_write.ksys_write
4.60 perf-profile.calltrace.cycles-pp.__filemap_get_folio.simple_write_begin.generic_perform_write.generic_file_write_iter.vfs_write
3.46 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64.write
2.86 perf-profile.calltrace.cycles-pp.copy_page_from_iter_atomic.generic_perform_write.generic_file_write_iter.vfs_write.ksys_write
46.54 perf-profile.calltrace.cycles-pp.read
1.70 perf-profile.calltrace.cycles-pp.fault_in_iov_iter_readable.generic_perform_write.generic_file_write_iter.vfs_write.ksys_write
1.71 perf-profile.calltrace.cycles-pp.file_remove_privs_flags.__generic_file_write_iter.generic_file_write_iter.vfs_write.ksys_write
1.49 perf-profile.calltrace.cycles-pp.fault_in_readable.fault_in_iov_iter_readable.generic_perform_write.generic_file_write_iter.vfs_write
6.20 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64.read
1.18 perf-profile.calltrace.cycles-pp.rw_verify_area.vfs_write.ksys_write.do_syscall_64.entry_SYSCALL_64_after_hwframe
1.06 perf-profile.calltrace.cycles-pp.security_inode_need_killpriv.file_remove_privs_flags.__generic_file_write_iter.generic_file_write_iter.vfs_write
2.82 ? 3% perf-profile.calltrace.cycles-pp.filemap_get_entry.__filemap_get_folio.simple_write_begin.generic_perform_write.generic_file_write_iter
0.91 perf-profile.calltrace.cycles-pp.file_update_time.__generic_file_write_iter.generic_file_write_iter.vfs_write.ksys_write
41.22 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe.read
0.88 perf-profile.calltrace.cycles-pp.cap_inode_need_killpriv.security_inode_need_killpriv.file_remove_privs_flags.__generic_file_write_iter.generic_file_write_iter
0.93 perf-profile.calltrace.cycles-pp.security_file_permission.rw_verify_area.vfs_write.ksys_write.do_syscall_64
1.06 perf-profile.calltrace.cycles-pp.__fsnotify_parent.vfs_write.ksys_write.do_syscall_64.entry_SYSCALL_64_after_hwframe
40.57 perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.read
3.61 perf-profile.calltrace.cycles-pp.__fsnotify_parent.vfs_read.ksys_read.do_syscall_64.entry_SYSCALL_64_after_hwframe
0.74 perf-profile.calltrace.cycles-pp.inode_needs_update_time.file_update_time.__generic_file_write_iter.generic_file_write_iter.vfs_write
0.68 perf-profile.calltrace.cycles-pp.__vfs_getxattr.cap_inode_need_killpriv.security_inode_need_killpriv.file_remove_privs_flags.__generic_file_write_iter
0.71 perf-profile.calltrace.cycles-pp.apparmor_file_permission.security_file_permission.rw_verify_area.vfs_write.ksys_write
0.81 perf-profile.calltrace.cycles-pp.xas_load.filemap_get_entry.__filemap_get_folio.simple_write_begin.generic_perform_write
2.30 perf-profile.calltrace.cycles-pp.touch_atime.filemap_read.vfs_read.ksys_read.do_syscall_64
0.59 ? 2% perf-profile.calltrace.cycles-pp.__fdget_pos.ksys_write.do_syscall_64.entry_SYSCALL_64_after_hwframe.write
1.93 perf-profile.calltrace.cycles-pp.atime_needs_update.touch_atime.filemap_read.vfs_read.ksys_read
2.16 perf-profile.calltrace.cycles-pp.rw_verify_area.vfs_read.ksys_read.do_syscall_64.entry_SYSCALL_64_after_hwframe
0.62 perf-profile.calltrace.cycles-pp.up_write.generic_file_write_iter.vfs_write.ksys_write.do_syscall_64
0.91 ? 2% perf-profile.calltrace.cycles-pp.__fdget_pos.ksys_read.do_syscall_64.entry_SYSCALL_64_after_hwframe.read
1.49 perf-profile.calltrace.cycles-pp.security_file_permission.rw_verify_area.vfs_read.ksys_read.do_syscall_64
1.38 perf-profile.calltrace.cycles-pp.xas_load.filemap_get_read_batch.filemap_get_pages.filemap_read.vfs_read
0.79 perf-profile.calltrace.cycles-pp.current_time.atime_needs_update.touch_atime.filemap_read.vfs_read
1.10 ? 2% perf-profile.calltrace.cycles-pp.apparmor_file_permission.security_file_permission.rw_verify_area.vfs_read.ksys_read
0.61 perf-profile.calltrace.cycles-pp.syscall_exit_to_user_mode.do_syscall_64.entry_SYSCALL_64_after_hwframe.read
0.52 perf-profile.calltrace.cycles-pp.xas_descend.xas_load.filemap_get_read_batch.filemap_get_pages.filemap_read
1.25 perf-profile.calltrace.cycles-pp.down_write.generic_file_write_iter.vfs_write.ksys_write.do_syscall_64
28.51 perf-profile.calltrace.cycles-pp.filemap_read.vfs_read.ksys_read.do_syscall_64.entry_SYSCALL_64_after_hwframe
50.51 perf-profile.calltrace.cycles-pp.write
15.07 perf-profile.calltrace.cycles-pp.copy_page_to_iter.filemap_read.vfs_read.ksys_read.do_syscall_64
14.45 perf-profile.calltrace.cycles-pp._copy_to_iter.copy_page_to_iter.filemap_read.vfs_read.ksys_read
47.49 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe.write
47.10 perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.write
46.14 perf-profile.calltrace.cycles-pp.ksys_write.do_syscall_64.entry_SYSCALL_64_after_hwframe.write
45.11 perf-profile.calltrace.cycles-pp.vfs_write.ksys_write.do_syscall_64.entry_SYSCALL_64_after_hwframe.write
40.93 perf-profile.calltrace.cycles-pp.generic_file_write_iter.vfs_write.ksys_write.do_syscall_64.entry_SYSCALL_64_after_hwframe
34.92 perf-profile.calltrace.cycles-pp.generic_perform_write.generic_file_write_iter.vfs_write.ksys_write.do_syscall_64
23.94 perf-profile.calltrace.cycles-pp.simple_write_end.generic_perform_write.generic_file_write_iter.vfs_write.ksys_write
22.65 perf-profile.calltrace.cycles-pp.folio_unlock.simple_write_end.generic_perform_write.generic_file_write_iter.vfs_write
3.06 perf-profile.children.cycles-pp.__generic_file_write_iter
4.94 perf-profile.children.cycles-pp.simple_write_begin
4.71 perf-profile.children.cycles-pp.__filemap_get_folio
47.66 perf-profile.children.cycles-pp.read
5.41 perf-profile.children.cycles-pp.entry_SYSCALL_64
2.93 perf-profile.children.cycles-pp.copy_page_from_iter_atomic
1.79 perf-profile.children.cycles-pp.file_remove_privs_flags
1.79 perf-profile.children.cycles-pp.fault_in_iov_iter_readable
3.50 perf-profile.children.cycles-pp.rw_verify_area
1.59 perf-profile.children.cycles-pp.fault_in_readable
4.77 perf-profile.children.cycles-pp.__fsnotify_parent
2.89 perf-profile.children.cycles-pp.entry_SYSRETQ_unsafe_stack
2.68 perf-profile.children.cycles-pp.security_file_permission
1.58 perf-profile.children.cycles-pp.__cond_resched
1.12 perf-profile.children.cycles-pp.security_inode_need_killpriv
2.88 ? 3% perf-profile.children.cycles-pp.filemap_get_entry
2.52 perf-profile.children.cycles-pp.xas_load
1.00 perf-profile.children.cycles-pp.file_update_time
1.19 ? 7% perf-profile.children.cycles-pp.sysvec_apic_timer_interrupt
1.28 ? 7% perf-profile.children.cycles-pp.asm_sysvec_apic_timer_interrupt
1.08 ? 8% perf-profile.children.cycles-pp.hrtimer_interrupt
0.93 perf-profile.children.cycles-pp.cap_inode_need_killpriv
1.11 ? 8% perf-profile.children.cycles-pp.__sysvec_apic_timer_interrupt
1.98 perf-profile.children.cycles-pp.apparmor_file_permission
0.85 perf-profile.children.cycles-pp.__vfs_getxattr
1.59 ? 2% perf-profile.children.cycles-pp.__fdget_pos
0.84 perf-profile.children.cycles-pp.inode_needs_update_time
0.92 ? 8% perf-profile.children.cycles-pp.__hrtimer_run_queues
0.88 ? 8% perf-profile.children.cycles-pp.tick_nohz_handler
0.82 ? 9% perf-profile.children.cycles-pp.update_process_times
0.51 ? 9% perf-profile.children.cycles-pp.sched_tick
0.88 perf-profile.children.cycles-pp.rcu_all_qs
1.19 perf-profile.children.cycles-pp.syscall_exit_to_user_mode
2.40 perf-profile.children.cycles-pp.touch_atime
0.56 perf-profile.children.cycles-pp.generic_write_checks
39.02 perf-profile.children.cycles-pp.ksys_read
2.15 perf-profile.children.cycles-pp.atime_needs_update
0.32 ? 9% perf-profile.children.cycles-pp.task_tick_fair
1.02 perf-profile.children.cycles-pp.xas_descend
0.65 perf-profile.children.cycles-pp.up_write
0.34 perf-profile.children.cycles-pp.strcmp
0.72 perf-profile.children.cycles-pp.aa_file_perm
0.35 perf-profile.children.cycles-pp.balance_dirty_pages_ratelimited_flags
0.33 perf-profile.children.cycles-pp.folio_mapping
0.33 ? 2% perf-profile.children.cycles-pp.folio_mark_dirty
0.28 perf-profile.children.cycles-pp.timestamp_truncate
0.28 ? 2% perf-profile.children.cycles-pp.xattr_resolve_name
0.30 perf-profile.children.cycles-pp.folio_wait_stable
0.63 perf-profile.children.cycles-pp.syscall_return_via_sysret
0.24 perf-profile.children.cycles-pp.generic_write_check_limits
0.44 perf-profile.children.cycles-pp.ktime_get_coarse_real_ts64
0.19 ? 2% perf-profile.children.cycles-pp.setattr_should_drop_suidgid
0.67 ? 2% perf-profile.children.cycles-pp.xas_start
0.89 perf-profile.children.cycles-pp.current_time
0.11 ? 9% perf-profile.children.cycles-pp.update_load_avg
0.13 ? 2% perf-profile.children.cycles-pp.__x64_sys_write
0.11 ? 12% perf-profile.children.cycles-pp.update_curr
0.17 ? 2% perf-profile.children.cycles-pp.inode_to_bdi
0.34 perf-profile.children.cycles-pp.syscall_exit_to_user_mode_prepare
0.45 perf-profile.children.cycles-pp.entry_SYSCALL_64_safe_stack
0.20 ? 2% perf-profile.children.cycles-pp.amd_clear_divider
0.60 perf-profile.children.cycles-pp.r_test
0.09 perf-profile.children.cycles-pp.is_bad_inode
0.38 perf-profile.children.cycles-pp.generic_file_read_iter
0.10 ? 4% perf-profile.children.cycles-pp.noop_dirty_folio
0.40 perf-profile.children.cycles-pp.w_test
0.05 perf-profile.children.cycles-pp.file_remove_privs
0.21 perf-profile.children.cycles-pp.make_vfsuid
0.24 ? 2% perf-profile.children.cycles-pp.__x64_sys_read
0.21 ? 2% perf-profile.children.cycles-pp.make_vfsgid
0.13 ? 3% perf-profile.children.cycles-pp.write@plt
0.07 ? 5% perf-profile.children.cycles-pp.balance_dirty_pages_ratelimited
0.19 perf-profile.children.cycles-pp.read@plt
0.10 perf-profile.children.cycles-pp.folio_mark_accessed
1.30 perf-profile.children.cycles-pp.down_write
28.81 perf-profile.children.cycles-pp.filemap_read
51.30 perf-profile.children.cycles-pp.write
15.22 perf-profile.children.cycles-pp.copy_page_to_iter
14.52 perf-profile.children.cycles-pp._copy_to_iter
88.99 perf-profile.children.cycles-pp.entry_SYSCALL_64_after_hwframe
88.15 perf-profile.children.cycles-pp.do_syscall_64
46.37 perf-profile.children.cycles-pp.ksys_write
45.42 perf-profile.children.cycles-pp.vfs_write
41.08 perf-profile.children.cycles-pp.generic_file_write_iter
35.24 perf-profile.children.cycles-pp.generic_perform_write
24.04 perf-profile.children.cycles-pp.simple_write_end
22.70 perf-profile.children.cycles-pp.folio_unlock
2.87 perf-profile.self.cycles-pp.copy_page_from_iter_atomic
1.71 perf-profile.self.cycles-pp.vfs_write
4.58 perf-profile.self.cycles-pp.__fsnotify_parent
1.54 perf-profile.self.cycles-pp.fault_in_readable
2.82 perf-profile.self.cycles-pp.entry_SYSRETQ_unsafe_stack
1.72 perf-profile.self.cycles-pp.write
1.31 perf-profile.self.cycles-pp.__filemap_get_folio
0.99 perf-profile.self.cycles-pp.generic_perform_write
4.31 perf-profile.self.cycles-pp.filemap_read
1.48 ? 2% perf-profile.self.cycles-pp.__fdget_pos
0.98 perf-profile.self.cycles-pp.simple_write_end
3.08 perf-profile.self.cycles-pp.read
2.50 perf-profile.self.cycles-pp.vfs_read
0.87 perf-profile.self.cycles-pp.__cond_resched
1.27 perf-profile.self.cycles-pp.do_syscall_64
0.51 perf-profile.self.cycles-pp.file_remove_privs_flags
1.15 ? 2% perf-profile.self.cycles-pp.apparmor_file_permission
0.97 perf-profile.self.cycles-pp.xas_load
1.14 perf-profile.self.cycles-pp.entry_SYSCALL_64
0.91 perf-profile.self.cycles-pp.entry_SYSCALL_64_after_hwframe
0.41 perf-profile.self.cycles-pp.inode_needs_update_time
0.78 perf-profile.self.cycles-pp.security_file_permission
0.46 perf-profile.self.cycles-pp.generic_file_write_iter
0.53 perf-profile.self.cycles-pp.rcu_all_qs
0.82 perf-profile.self.cycles-pp.rw_verify_area
0.34 perf-profile.self.cycles-pp.__vfs_getxattr
0.61 perf-profile.self.cycles-pp.up_write
0.35 perf-profile.self.cycles-pp.ksys_write
0.86 perf-profile.self.cycles-pp.xas_descend
0.60 perf-profile.self.cycles-pp.syscall_exit_to_user_mode
0.34 ? 2% perf-profile.self.cycles-pp.generic_write_checks
0.64 perf-profile.self.cycles-pp.aa_file_perm
0.28 perf-profile.self.cycles-pp.__generic_file_write_iter
0.25 ? 2% perf-profile.self.cycles-pp.strcmp
0.62 perf-profile.self.cycles-pp.syscall_return_via_sysret
0.95 perf-profile.self.cycles-pp.atime_needs_update
0.27 perf-profile.self.cycles-pp.folio_mapping
0.20 perf-profile.self.cycles-pp.fault_in_iov_iter_readable
0.23 ? 2% perf-profile.self.cycles-pp.timestamp_truncate
0.23 perf-profile.self.cycles-pp.simple_write_begin
0.87 perf-profile.self.cycles-pp.filemap_get_pages
0.21 ? 2% perf-profile.self.cycles-pp.balance_dirty_pages_ratelimited_flags
0.74 perf-profile.self.cycles-pp.copy_page_to_iter
0.58 ? 2% perf-profile.self.cycles-pp.xas_start
0.35 ? 2% perf-profile.self.cycles-pp.ktime_get_coarse_real_ts64
0.17 ? 2% perf-profile.self.cycles-pp.setattr_should_drop_suidgid
0.17 ? 2% perf-profile.self.cycles-pp.file_update_time
0.19 perf-profile.self.cycles-pp.generic_write_check_limits
0.18 ? 2% perf-profile.self.cycles-pp.security_inode_need_killpriv
0.04 ? 45% perf-profile.self.cycles-pp.sched_tick
0.16 ? 2% perf-profile.self.cycles-pp.xattr_resolve_name
0.07 ? 12% perf-profile.self.cycles-pp.update_load_avg
0.09 ? 5% perf-profile.self.cycles-pp.__x64_sys_write
0.61 perf-profile.self.cycles-pp.current_time
0.45 perf-profile.self.cycles-pp.entry_SYSCALL_64_safe_stack
0.60 perf-profile.self.cycles-pp.ksys_read
0.13 ? 2% perf-profile.self.cycles-pp.folio_wait_stable
0.17 ? 2% perf-profile.self.cycles-pp.folio_mark_dirty
0.04 ? 71% perf-profile.self.cycles-pp.update_curr
0.28 perf-profile.self.cycles-pp.syscall_exit_to_user_mode_prepare
0.10 ? 3% perf-profile.self.cycles-pp.inode_to_bdi
0.14 perf-profile.self.cycles-pp.amd_clear_divider
0.08 ? 5% perf-profile.self.cycles-pp.cap_inode_need_killpriv
0.32 perf-profile.self.cycles-pp.generic_file_read_iter
0.49 perf-profile.self.cycles-pp.r_test
0.06 perf-profile.self.cycles-pp.is_bad_inode
0.06 ? 6% perf-profile.self.cycles-pp.noop_dirty_folio
0.21 perf-profile.self.cycles-pp.touch_atime
0.32 perf-profile.self.cycles-pp.w_test
0.15 perf-profile.self.cycles-pp.make_vfsuid
0.16 ? 3% perf-profile.self.cycles-pp.make_vfsgid
0.18 ? 4% perf-profile.self.cycles-pp.__x64_sys_read
1.03 perf-profile.self.cycles-pp.down_write
14.16 perf-profile.self.cycles-pp._copy_to_iter
22.47 perf-profile.self.cycles-pp.folio_unlock
*************************************************************************
threads 4 sockets Intel(R) Xeon(R) Platinum 8380H CPU @ 2.90GHz (Cooper Lake) with 192G memory
===============================================================
kconfig/nr_task/rootfs/runtime/tbox_group/test/testcase:
4-rhel-8.3/100%/debian-12-x86_64-20240206.cgz/300s/lkp-cpl-4sp2/fsdisk-w/unixbench
Remove shift of thermal clock")
Correct NUMA imbalance calculation")
6efc66e7c7874a28529068c203f
---------------------------
%stddev
\
-9.9% 9576106 ? 7% meminfo.DirectMap2M
18694 ? 62% numa-meminfo.node3.Mapped
2858 vmstat.system.cs
80.17 ? 15% perf-c2c.DRAM.remote
45.17 ? 12% perf-c2c.HITM.remote
0.95 ? 4% mpstat.cpu.all.irq%
0.05 mpstat.cpu.all.soft%
2.00 ? 3% mpstat.cpu.all.usr%
+1.7% 203741 proc-vmstat.nr_inactive_anon
+1.5% 39924 proc-vmstat.nr_slab_reclaimable
+1.7% 203741 proc-vmstat.nr_zone_inactive_anon
-26.7% 90543615 ? 6% unixbench.throughput
+7.2% 330488 unixbench.time.involuntary_context_switches
1557 ? 3% unixbench.time.user_time
-26.6% 3.365e+10 ? 6% unixbench.workload
1.77 perf-stat.i.MPKI
-30.9% 6.054e+09 ? 4% perf-stat.i.branch-instructions
-33.8% 35207703 ? 2% perf-stat.i.branch-misses
-18.9% 49358107 ? 4% perf-stat.i.cache-misses
-18.5% 66726450 ? 3% perf-stat.i.cache-references
2828 perf-stat.i.context-switches
18.94 ? 4% perf-stat.i.cpi
-1.9% 6.508e+11 perf-stat.i.cpu-cycles
-1.7% 257.83 perf-stat.i.cpu-migrations
11075 ? 4% perf-stat.i.cycles-between-cache-misses
-30.9% 2.944e+10 ? 4% perf-stat.i.instructions
0.14 ? 27% perf-stat.i.major-faults
1.68 perf-stat.overall.MPKI
0.56 perf-stat.overall.branch-miss-rate%
22.32 ? 5% perf-stat.overall.cpi
13241 ? 4% perf-stat.overall.cycles-between-cache-misses
0.04 ? 5% perf-stat.overall.ipc
-4.3% 339.50 ? 2% perf-stat.overall.path-length
-29.9% 6.301e+09 ? 5% perf-stat.ps.branch-instructions
-34.2% 35393062 ? 3% perf-stat.ps.branch-misses
-17.5% 51613567 ? 4% perf-stat.ps.cache-misses
-17.5% 69192337 ? 4% perf-stat.ps.cache-references
2749 perf-stat.ps.context-switches
-2.5% 250.41 perf-stat.ps.cpu-migrations
-29.9% 3.064e+10 ? 5% perf-stat.ps.instructions
0.12 ? 26% perf-stat.ps.major-faults
-29.9% 1.141e+13 ? 5% perf-stat.total.instructions
-15.0% 26687201 ? 6% sched_debug.cfs_rq:/.avg_vruntime.min
0.65 ? 5% sched_debug.cfs_rq:/.h_nr_running.min
0.16 ? 16% sched_debug.cfs_rq:/.h_nr_running.stddev
2920 ? 5% sched_debug.cfs_rq:/.load.min
11.23 ? 17% sched_debug.cfs_rq:/.load_avg.avg
392.71 ? 24% sched_debug.cfs_rq:/.load_avg.max
2.60 ? 5% sched_debug.cfs_rq:/.load_avg.min
44.19 ? 20% sched_debug.cfs_rq:/.load_avg.stddev
-15.0% 26687201 ? 6% sched_debug.cfs_rq:/.min_vruntime.min
0.77 ? 6% sched_debug.cfs_rq:/.nr_running.avg
0.65 ? 5% sched_debug.cfs_rq:/.nr_running.min
0.10 ? 24% sched_debug.cfs_rq:/.nr_running.stddev
-10.8% 797.67 ? 6% sched_debug.cfs_rq:/.runnable_avg.avg
-15.9% 665.91 ? 5% sched_debug.cfs_rq:/.runnable_avg.min
+50.6% 140.93 ? 11% sched_debug.cfs_rq:/.runnable_avg.stddev
-11.1% 789.04 ? 6% sched_debug.cfs_rq:/.util_avg.avg
-17.2% 550.39 ? 6% sched_debug.cfs_rq:/.util_avg.min
+84.7% 103.92 ? 20% sched_debug.cfs_rq:/.util_avg.stddev
72.28 ? 10% sched_debug.cfs_rq:/.util_est.avg
+115.2% 2511775 ? 5% sched_debug.cpu.avg_idle.max
-15.8% 638698 ? 11% sched_debug.cpu.avg_idle.min
214146 ? 11% sched_debug.cpu.avg_idle.stddev
+18.5% 543.69 ? 5% sched_debug.cpu.clock.stddev
1238 ? 4% sched_debug.cpu.clock_task.stddev
10688 ? 5% sched_debug.cpu.curr->pid.avg
-7.1% 12966 ? 3% sched_debug.cpu.curr->pid.max
1167 ? 35% sched_debug.cpu.curr->pid.stddev
+110.0% 1171426 ? 5% sched_debug.cpu.max_idle_balance_cost.max
80122 ? 11% sched_debug.cpu.max_idle_balance_cost.stddev
0.00 ? 7% sched_debug.cpu.next_balance.stddev
0.78 ? 6% sched_debug.cpu.nr_running.avg
0.65 ? 5% sched_debug.cpu.nr_running.min
0.16 ? 15% sched_debug.cpu.nr_running.stddev
-11.3% 915.37 ? 5% sched_debug.cpu.nr_switches.min
13.68 ? 2% perf-profile.calltrace.cycles-pp.folio_unlock.simple_write_end.generic_perform_write.generic_file_write_iter.vfs_write
0.36 ? 71% perf-profile.calltrace.cycles-pp.fault_in_iov_iter_readable.generic_perform_write.generic_file_write_iter.vfs_write.ksys_write
0.67 ? 13% perf-profile.calltrace.cycles-pp.w_test
16.82 perf-profile.calltrace.cycles-pp.simple_write_end.generic_perform_write.generic_file_write_iter.vfs_write.ksys_write
0.27 ?100% perf-profile.calltrace.cycles-pp.__fdget_pos.ksys_write.do_syscall_64.entry_SYSCALL_64_after_hwframe.write
0.47 ? 45% perf-profile.calltrace.cycles-pp.apparmor_file_permission.security_file_permission.rw_verify_area.vfs_write.ksys_write
1.14 ? 4% perf-profile.calltrace.cycles-pp.xas_load.filemap_get_entry.__filemap_get_folio.simple_write_begin.generic_perform_write
0.36 ? 70% perf-profile.calltrace.cycles-pp.syscall_return_via_sysret.write
0.63 ? 8% perf-profile.calltrace.cycles-pp.rw_verify_area.vfs_write.ksys_write.do_syscall_64.entry_SYSCALL_64_after_hwframe
0.60 ? 8% perf-profile.calltrace.cycles-pp.security_file_permission.rw_verify_area.vfs_write.ksys_write.do_syscall_64
0.81 ? 8% perf-profile.calltrace.cycles-pp.__generic_file_write_iter.generic_file_write_iter.vfs_write.ksys_write.do_syscall_64
0.69 ? 4% perf-profile.calltrace.cycles-pp.syscall_exit_to_user_mode.do_syscall_64.entry_SYSCALL_64_after_hwframe.write
97.50 perf-profile.calltrace.cycles-pp.write
4.51 perf-profile.calltrace.cycles-pp.simple_write_begin.generic_perform_write.generic_file_write_iter.vfs_write.ksys_write
4.42 perf-profile.calltrace.cycles-pp.__filemap_get_folio.simple_write_begin.generic_perform_write.generic_file_write_iter.vfs_write
4.07 perf-profile.calltrace.cycles-pp.filemap_get_entry.__filemap_get_folio.simple_write_begin.generic_perform_write.generic_file_write_iter
95.98 perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.write
96.07 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe.write
94.89 perf-profile.calltrace.cycles-pp.ksys_write.do_syscall_64.entry_SYSCALL_64_after_hwframe.write
94.25 perf-profile.calltrace.cycles-pp.vfs_write.ksys_write.do_syscall_64.entry_SYSCALL_64_after_hwframe.write
92.20 perf-profile.calltrace.cycles-pp.generic_file_write_iter.vfs_write.ksys_write.do_syscall_64.entry_SYSCALL_64_after_hwframe
62.04 perf-profile.calltrace.cycles-pp.rep_movs_alternative.copy_page_from_iter_atomic.generic_perform_write.generic_file_write_iter.vfs_write
90.55 perf-profile.calltrace.cycles-pp.generic_perform_write.generic_file_write_iter.vfs_write.ksys_write.do_syscall_64
69.93 perf-profile.calltrace.cycles-pp.copy_page_from_iter_atomic.generic_perform_write.generic_file_write_iter.vfs_write.ksys_write
13.93 perf-profile.children.cycles-pp.folio_unlock
0.68 ? 13% perf-profile.children.cycles-pp.w_test
16.90 perf-profile.children.cycles-pp.simple_write_end
0.58 ? 11% perf-profile.children.cycles-pp.fault_in_iov_iter_readable
0.54 ? 11% perf-profile.children.cycles-pp.fault_in_readable
1.15 ? 4% perf-profile.children.cycles-pp.xas_load
0.64 ? 8% perf-profile.children.cycles-pp.rw_verify_area
0.61 ? 9% perf-profile.children.cycles-pp.security_file_permission
0.55 ? 9% perf-profile.children.cycles-pp.apparmor_file_permission
0.49 ? 15% perf-profile.children.cycles-pp.__fdget_pos
0.82 ? 8% perf-profile.children.cycles-pp.__generic_file_write_iter
0.17 ? 16% perf-profile.children.cycles-pp.xas_start
0.46 ? 8% perf-profile.children.cycles-pp.file_remove_privs_flags
0.53 ? 4% perf-profile.children.cycles-pp.syscall_return_via_sysret
0.20 ? 10% perf-profile.children.cycles-pp.generic_write_checks
0.15 ? 14% perf-profile.children.cycles-pp.generic_write_check_limits
0.19 ? 11% perf-profile.children.cycles-pp.syscall_exit_to_user_mode_prepare
0.33 ? 8% perf-profile.children.cycles-pp.write@plt
0.13 ? 11% perf-profile.children.cycles-pp.aa_file_perm
0.26 ? 8% perf-profile.children.cycles-pp.inode_needs_update_time
0.31 ? 9% perf-profile.children.cycles-pp.file_update_time
0.18 ? 7% perf-profile.children.cycles-pp.up_write
0.19 ? 5% perf-profile.children.cycles-pp.__cond_resched
0.14 ? 10% perf-profile.children.cycles-pp.entry_SYSRETQ_unsafe_stack
0.09 ? 10% perf-profile.children.cycles-pp.rcu_all_qs
0.11 ? 14% perf-profile.children.cycles-pp.__intel_pmu_enable_all
0.13 ? 16% perf-profile.children.cycles-pp.perf_rotate_context
0.19 ? 13% perf-profile.children.cycles-pp.perf_mux_hrtimer_handler
0.08 ? 5% perf-profile.children.cycles-pp.ret_from_fork
0.08 ? 5% perf-profile.children.cycles-pp.ret_from_fork_asm
0.08 ? 5% perf-profile.children.cycles-pp.kthread
0.49 ? 4% perf-profile.children.cycles-pp.folio_mapping
0.70 ? 4% perf-profile.children.cycles-pp.syscall_exit_to_user_mode
0.44 ? 7% perf-profile.children.cycles-pp.task_mm_cid_work
0.45 ? 8% perf-profile.children.cycles-pp.task_work_run
98.00 perf-profile.children.cycles-pp.write
4.52 perf-profile.children.cycles-pp.simple_write_begin
4.43 perf-profile.children.cycles-pp.__filemap_get_folio
4.08 perf-profile.children.cycles-pp.filemap_get_entry
96.53 perf-profile.children.cycles-pp.entry_SYSCALL_64_after_hwframe
96.46 perf-profile.children.cycles-pp.do_syscall_64
95.17 perf-profile.children.cycles-pp.ksys_write
94.53 perf-profile.children.cycles-pp.vfs_write
92.21 perf-profile.children.cycles-pp.generic_file_write_iter
90.81 perf-profile.children.cycles-pp.generic_perform_write
67.64 perf-profile.children.cycles-pp.copy_page_from_iter_atomic
65.23 perf-profile.children.cycles-pp.rep_movs_alternative
13.80 ? 2% perf-profile.self.cycles-pp.folio_unlock
0.57 ? 14% perf-profile.self.cycles-pp.w_test
1.02 ? 9% perf-profile.self.cycles-pp.vfs_write
0.50 ? 13% perf-profile.self.cycles-pp.fault_in_readable
0.49 ? 15% perf-profile.self.cycles-pp.__fdget_pos
2.40 perf-profile.self.cycles-pp.copy_page_from_iter_atomic
0.41 ? 10% perf-profile.self.cycles-pp.apparmor_file_permission
0.17 ? 17% perf-profile.self.cycles-pp.xas_start
0.38 ? 8% perf-profile.self.cycles-pp.do_syscall_64
0.53 ? 5% perf-profile.self.cycles-pp.syscall_return_via_sysret
0.22 ? 8% perf-profile.self.cycles-pp.xas_load
0.14 ? 13% perf-profile.self.cycles-pp.generic_write_check_limits
0.18 ? 11% perf-profile.self.cycles-pp.syscall_exit_to_user_mode_prepare
0.33 ? 8% perf-profile.self.cycles-pp.write@plt
0.44 ? 10% perf-profile.self.cycles-pp.write
0.13 ? 13% perf-profile.self.cycles-pp.aa_file_perm
0.26 ? 6% perf-profile.self.cycles-pp.generic_file_write_iter
0.59 perf-profile.self.cycles-pp.folio_mark_dirty
0.08 ? 8% perf-profile.self.cycles-pp.simple_write_begin
0.18 ? 7% perf-profile.self.cycles-pp.up_write
0.13 ? 10% perf-profile.self.cycles-pp.inode_needs_update_time
0.13 ? 13% perf-profile.self.cycles-pp.entry_SYSRETQ_unsafe_stack
0.15 ? 9% perf-profile.self.cycles-pp.ksys_write
0.08 ? 8% perf-profile.self.cycles-pp.rcu_all_qs
0.11 ? 14% perf-profile.self.cycles-pp.__intel_pmu_enable_all
0.18 ? 13% perf-profile.self.cycles-pp.folio_mapping
0.92 ? 4% perf-profile.self.cycles-pp.generic_perform_write
0.43 ? 7% perf-profile.self.cycles-pp.task_mm_cid_work
2.19 perf-profile.self.cycles-pp.simple_write_end
2.91 ? 2% perf-profile.self.cycles-pp.filemap_get_entry
64.63 perf-profile.self.cycles-pp.rep_movs_alternative
estimated based on internal Intel analysis and are provided
purposes only. Any difference in system hardware or software
may affect actual performance.
om/intel/lkp-tests/wiki">https://github.com/intel/lkp-tests/wiki