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Message-ID: <202406201547.f5077fa1-oliver.sang@intel.com>
Date: Thu, 20 Jun 2024 16:16:28 +0800
From: kernel test robot <oliver.sang@...el.com>
To: <zhangwei123171@...il.com>
CC: <oe-lkp@...ts.linux.dev>, <lkp@...el.com>, <linux-kernel@...r.kernel.org>,
	<ying.huang@...el.com>, <feng.tang@...el.com>, <fengwei.yin@...el.com>,
	<aubrey.li@...ux.intel.com>, <yu.c.chen@...el.com>, <mingo@...hat.com>,
	<peterz@...radead.org>, <juri.lelli@...hat.com>,
	<vincent.guittot@...aro.org>, <dietmar.eggemann@....com>,
	<rostedt@...dmis.org>, zhangwei123171 <zhangwei123171@...com>,
	<oliver.sang@...el.com>
Subject: Re: [PATCH] sched/fair: prefer available idle cpu in select_idle_core



Hello,

kernel test robot noticed a 2.9% improvement of stress-ng.vm-rw.ops_per_sec on:


commit: 9f2e02ee19cda318b3889a27c13aee04fdbeb179 ("[PATCH] sched/fair: prefer available idle cpu in select_idle_core")
url: https://github.com/intel-lab-lkp/linux/commits/zhangwei123171-gmail-com/sched-fair-prefer-available-idle-cpu-in-select_idle_core/20240612-195645
base: https://git.kernel.org/cgit/linux/kernel/git/tip/tip.git c793a62823d1ce8f70d9cfc7803e3ea436277cda
patch link: https://lore.kernel.org/all/20240612115410.1659149-1-zhangwei123171@jd.com/
patch subject: [PATCH] sched/fair: prefer available idle cpu in select_idle_core

testcase: stress-ng
test machine: 224 threads 2 sockets Intel(R) Xeon(R) Platinum 8480CTDX (Sapphire Rapids) with 512G memory
parameters:

	nr_threads: 100%
	testtime: 60s
	test: vm-rw
	cpufreq_governor: performance






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


The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20240620/202406201547.f5077fa1-oliver.sang@intel.com

=========================================================================================
compiler/cpufreq_governor/kconfig/nr_threads/rootfs/tbox_group/test/testcase/testtime:
  gcc-13/performance/x86_64-rhel-8.3/100%/debian-12-x86_64-20240206.cgz/lkp-spr-2sp4/vm-rw/stress-ng/60s

commit: 
  c793a62823 ("sched/core: Drop spinlocks on contention iff kernel is preemptible")
  9f2e02ee19 ("sched/fair: prefer available idle cpu in select_idle_core")

c793a62823d1ce8f 9f2e02ee19cda318b3889a27c13 
---------------- --------------------------- 
         %stddev     %change         %stddev
             \          |                \  
    295657 ±  6%     +22.8%     362935 ±  8%  meminfo.Active
    295610 ±  6%     +22.8%     362887 ±  8%  meminfo.Active(anon)
    150724 ± 21%     +67.4%     252378 ±  3%  sched_debug.cfs_rq:/.avg_vruntime.stddev
    150724 ± 21%     +67.4%     252378 ±  3%  sched_debug.cfs_rq:/.min_vruntime.stddev
  10941857            +3.9%   11367018        vmstat.system.cs
   1076455            -1.9%    1055781        vmstat.system.in
     74324 ±  6%     +21.9%      90584 ±  7%  proc-vmstat.nr_active_anon
 3.512e+09            +3.3%  3.626e+09        proc-vmstat.nr_foll_pin_acquired
 3.512e+09            +3.3%  3.626e+09        proc-vmstat.nr_foll_pin_released
     74324 ±  6%     +21.9%      90584 ±  7%  proc-vmstat.nr_zone_active_anon
    760031           -70.4%     224972        stress-ng.time.involuntary_context_switches
 3.948e+08            +2.9%  4.062e+08        stress-ng.time.voluntary_context_switches
 1.975e+08            +2.9%  2.032e+08        stress-ng.vm-rw.ops
   3291726            +2.9%    3387191        stress-ng.vm-rw.ops_per_sec
 4.035e+10            +2.2%  4.123e+10        perf-stat.i.branch-instructions
      0.67            -0.0        0.65        perf-stat.i.branch-miss-rate%
 6.491e+09            +1.1%  6.564e+09        perf-stat.i.cache-references
  11493579            +3.5%   11900089        perf-stat.i.context-switches
      2.41            -1.9%       2.37        perf-stat.i.cpi
   4817773            +1.7%    4901418        perf-stat.i.cpu-migrations
  2.16e+11            +2.2%  2.208e+11        perf-stat.i.instructions
      0.43            +1.7%       0.43        perf-stat.i.ipc
     71.91            +3.6%      74.50        perf-stat.i.metric.K/sec
      0.62            -0.0        0.61        perf-stat.overall.branch-miss-rate%
      2.38            -1.6%       2.34        perf-stat.overall.cpi
      0.42            +1.6%       0.43        perf-stat.overall.ipc
 3.903e+10            +2.5%  3.999e+10        perf-stat.ps.branch-instructions
 6.286e+09            +1.7%  6.395e+09        perf-stat.ps.cache-references
  11123522            +4.1%   11584380        perf-stat.ps.context-switches
   4664338            +2.4%    4775066        perf-stat.ps.cpu-migrations
  2.09e+11            +2.5%  2.143e+11        perf-stat.ps.instructions
 1.266e+13            +2.8%  1.301e+13        perf-stat.total.instructions
     16.29            -0.3       15.97        perf-profile.calltrace.cycles-pp.pipe_write.vfs_write.ksys_write.do_syscall_64.entry_SYSCALL_64_after_hwframe
     16.70            -0.3       16.39        perf-profile.calltrace.cycles-pp.vfs_write.ksys_write.do_syscall_64.entry_SYSCALL_64_after_hwframe.write
     14.46            -0.3       14.16        perf-profile.calltrace.cycles-pp.__wake_up_common.__wake_up_sync_key.pipe_write.vfs_write.ksys_write
     14.53            -0.3       14.23        perf-profile.calltrace.cycles-pp.__wake_up_sync_key.pipe_write.vfs_write.ksys_write.do_syscall_64
     13.71            -0.3       13.41        perf-profile.calltrace.cycles-pp.try_to_wake_up.autoremove_wake_function.__wake_up_common.__wake_up_sync_key.pipe_write
     13.73            -0.3       13.44        perf-profile.calltrace.cycles-pp.autoremove_wake_function.__wake_up_common.__wake_up_sync_key.pipe_write.vfs_write
     18.54            -0.2       18.31        perf-profile.calltrace.cycles-pp.__clone
      8.93            -0.2        8.76        perf-profile.calltrace.cycles-pp.write.stress_vm_rw
      8.77            -0.2        8.60        perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.write.stress_vm_rw
      8.71            -0.2        8.54        perf-profile.calltrace.cycles-pp.ksys_write.do_syscall_64.entry_SYSCALL_64_after_hwframe.write.stress_vm_rw
      8.78            -0.2        8.62        perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe.write.stress_vm_rw
     62.61            -0.2       62.46        perf-profile.calltrace.cycles-pp.stress_vm_rw
      8.39            -0.1        8.25        perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.write.__clone
      8.40            -0.1        8.26        perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe.write.__clone
      8.32            -0.1        8.18        perf-profile.calltrace.cycles-pp.ksys_write.do_syscall_64.entry_SYSCALL_64_after_hwframe.write.__clone
      8.52            -0.1        8.38        perf-profile.calltrace.cycles-pp.write.__clone
     13.62            -0.1       13.48        perf-profile.calltrace.cycles-pp.pipe_read.vfs_read.ksys_read.do_syscall_64.entry_SYSCALL_64_after_hwframe
     14.30            -0.1       14.17        perf-profile.calltrace.cycles-pp.vfs_read.ksys_read.do_syscall_64.entry_SYSCALL_64_after_hwframe.read
      9.69            -0.1        9.56        perf-profile.calltrace.cycles-pp.schedule.pipe_read.vfs_read.ksys_read.do_syscall_64
      9.59            -0.1        9.47        perf-profile.calltrace.cycles-pp.__schedule.schedule.pipe_read.vfs_read.ksys_read
     23.18            -0.1       23.07        perf-profile.calltrace.cycles-pp._copy_to_iter.copy_page_to_iter.process_vm_rw_single_vec.process_vm_rw_core.process_vm_rw
     23.42            -0.1       23.31        perf-profile.calltrace.cycles-pp.copy_page_to_iter.process_vm_rw_single_vec.process_vm_rw_core.process_vm_rw.__x64_sys_process_vm_readv
      9.04            -0.1        8.95        perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.read.stress_vm_rw
      4.71            -0.1        4.62        perf-profile.calltrace.cycles-pp.available_idle_cpu.select_idle_core.select_idle_cpu.select_idle_sibling.select_task_rq_fair
      9.05            -0.1        8.96        perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe.read.stress_vm_rw
      7.79            -0.1        7.71        perf-profile.calltrace.cycles-pp.ksys_read.do_syscall_64.entry_SYSCALL_64_after_hwframe.read.stress_vm_rw
      0.63            -0.1        0.56        perf-profile.calltrace.cycles-pp.read
      0.70            -0.0        0.67        perf-profile.calltrace.cycles-pp.prepare_task_switch.__schedule.schedule.pipe_read.vfs_read
      0.58            -0.0        0.55        perf-profile.calltrace.cycles-pp._raw_spin_lock.__schedule.schedule_idle.do_idle.cpu_startup_entry
      1.42            -0.0        1.40        perf-profile.calltrace.cycles-pp.switch_fpu_return.syscall_exit_to_user_mode.do_syscall_64.entry_SYSCALL_64_after_hwframe.read
      0.84            -0.0        0.83        perf-profile.calltrace.cycles-pp.syscall_exit_to_user_mode.do_syscall_64.entry_SYSCALL_64_after_hwframe.read.__clone
      0.71            +0.0        0.74        perf-profile.calltrace.cycles-pp.update_load_avg.enqueue_entity.enqueue_task_fair.ttwu_do_activate.sched_ttwu_pending
      0.87            +0.0        0.90        perf-profile.calltrace.cycles-pp.switch_mm_irqs_off.__schedule.schedule_idle.do_idle.cpu_startup_entry
      6.19            +0.0        6.22        perf-profile.calltrace.cycles-pp.cpuidle_enter_state.cpuidle_enter.cpuidle_idle_call.do_idle.cpu_startup_entry
      6.24            +0.0        6.28        perf-profile.calltrace.cycles-pp.cpuidle_enter.cpuidle_idle_call.do_idle.cpu_startup_entry.start_secondary
      5.16            +0.0        5.21        perf-profile.calltrace.cycles-pp._copy_from_iter.copy_page_from_iter.process_vm_rw_single_vec.process_vm_rw_core.process_vm_rw
      2.76            +0.0        2.81        perf-profile.calltrace.cycles-pp.pin_user_pages_remote.process_vm_rw_single_vec.process_vm_rw_core.process_vm_rw.__x64_sys_process_vm_writev
      3.50            +0.0        3.54        perf-profile.calltrace.cycles-pp.schedule_idle.do_idle.cpu_startup_entry.start_secondary.common_startup_64
      3.36            +0.0        3.41        perf-profile.calltrace.cycles-pp.__schedule.schedule_idle.do_idle.cpu_startup_entry.start_secondary
      5.35            +0.0        5.40        perf-profile.calltrace.cycles-pp.copy_page_from_iter.process_vm_rw_single_vec.process_vm_rw_core.process_vm_rw.__x64_sys_process_vm_writev
      0.66            +0.1        0.73        perf-profile.calltrace.cycles-pp.sched_mm_cid_migrate_to.ttwu_do_activate.sched_ttwu_pending.__flush_smp_call_function_queue.flush_smp_call_function_queue
      6.76            +0.1        6.82        perf-profile.calltrace.cycles-pp.cpuidle_idle_call.do_idle.cpu_startup_entry.start_secondary.common_startup_64
      2.15            +0.1        2.22        perf-profile.calltrace.cycles-pp.enqueue_entity.enqueue_task_fair.ttwu_do_activate.sched_ttwu_pending.__flush_smp_call_function_queue
      7.38            +0.1        7.45        perf-profile.calltrace.cycles-pp.select_idle_cpu.select_idle_sibling.select_task_rq_fair.select_task_rq.try_to_wake_up
      9.00            +0.1        9.08        perf-profile.calltrace.cycles-pp.select_task_rq_fair.select_task_rq.try_to_wake_up.autoremove_wake_function.__wake_up_common
      9.37            +0.1        9.45        perf-profile.calltrace.cycles-pp.select_task_rq.try_to_wake_up.autoremove_wake_function.__wake_up_common.__wake_up_sync_key
      2.58            +0.1        2.68        perf-profile.calltrace.cycles-pp.enqueue_task_fair.ttwu_do_activate.sched_ttwu_pending.__flush_smp_call_function_queue.flush_smp_call_function_queue
      9.08            +0.1        9.19        perf-profile.calltrace.cycles-pp.process_vm_rw_single_vec.process_vm_rw_core.process_vm_rw.__x64_sys_process_vm_writev.do_syscall_64
      9.71            +0.1        9.82        perf-profile.calltrace.cycles-pp.process_vm_rw_core.process_vm_rw.__x64_sys_process_vm_writev.do_syscall_64.entry_SYSCALL_64_after_hwframe
      8.48            +0.1        8.60        perf-profile.calltrace.cycles-pp.select_idle_sibling.select_task_rq_fair.select_task_rq.try_to_wake_up.autoremove_wake_function
     10.27            +0.1       10.39        perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe.process_vm_writev.stress_vm_rw
     10.12            +0.1       10.23        perf-profile.calltrace.cycles-pp.__x64_sys_process_vm_writev.do_syscall_64.entry_SYSCALL_64_after_hwframe.process_vm_writev.stress_vm_rw
     10.24            +0.1       10.36        perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.process_vm_writev.stress_vm_rw
     10.10            +0.1       10.22        perf-profile.calltrace.cycles-pp.process_vm_rw.__x64_sys_process_vm_writev.do_syscall_64.entry_SYSCALL_64_after_hwframe.process_vm_writev
     10.64            +0.1       10.77        perf-profile.calltrace.cycles-pp.process_vm_writev.stress_vm_rw
      4.31            +0.2        4.46        perf-profile.calltrace.cycles-pp.sched_ttwu_pending.__flush_smp_call_function_queue.flush_smp_call_function_queue.do_idle.cpu_startup_entry
      5.36            +0.2        5.52        perf-profile.calltrace.cycles-pp.flush_smp_call_function_queue.do_idle.cpu_startup_entry.start_secondary.common_startup_64
      3.40            +0.2        3.57        perf-profile.calltrace.cycles-pp.ttwu_do_activate.sched_ttwu_pending.__flush_smp_call_function_queue.flush_smp_call_function_queue.do_idle
      4.81            +0.2        4.99        perf-profile.calltrace.cycles-pp.__flush_smp_call_function_queue.flush_smp_call_function_queue.do_idle.cpu_startup_entry.start_secondary
     16.66            +0.3       16.96        perf-profile.calltrace.cycles-pp.common_startup_64
     16.57            +0.3       16.88        perf-profile.calltrace.cycles-pp.cpu_startup_entry.start_secondary.common_startup_64
     16.54            +0.3       16.84        perf-profile.calltrace.cycles-pp.do_idle.cpu_startup_entry.start_secondary.common_startup_64
     16.58            +0.3       16.89        perf-profile.calltrace.cycles-pp.start_secondary.common_startup_64
     76.34            -0.4       75.95        perf-profile.children.cycles-pp.do_syscall_64
     76.51            -0.4       76.12        perf-profile.children.cycles-pp.entry_SYSCALL_64_after_hwframe
     16.31            -0.3       16.00        perf-profile.children.cycles-pp.pipe_write
     14.46            -0.3       14.16        perf-profile.children.cycles-pp.__wake_up_common
     14.54            -0.3       14.24        perf-profile.children.cycles-pp.__wake_up_sync_key
     13.74            -0.3       13.44        perf-profile.children.cycles-pp.autoremove_wake_function
     13.72            -0.3       13.43        perf-profile.children.cycles-pp.try_to_wake_up
     16.83            -0.3       16.57        perf-profile.children.cycles-pp.vfs_write
     17.16            -0.2       16.91        perf-profile.children.cycles-pp.ksys_write
     17.70            -0.2       17.45        perf-profile.children.cycles-pp.write
     18.54            -0.2       18.31        perf-profile.children.cycles-pp.__clone
     18.78            -0.2       18.58        perf-profile.children.cycles-pp.read
      2.91            -0.2        2.72        perf-profile.children.cycles-pp._raw_spin_lock
     13.88            -0.2       13.71        perf-profile.children.cycles-pp.pipe_read
     14.54            -0.2       14.37        perf-profile.children.cycles-pp.vfs_read
      9.93            -0.2        9.76        perf-profile.children.cycles-pp.schedule
     14.70            -0.2       14.54        perf-profile.children.cycles-pp.ksys_read
      0.24            -0.2        0.08        perf-profile.children.cycles-pp.native_queued_spin_lock_slowpath
     62.61            -0.2       62.46        perf-profile.children.cycles-pp.stress_vm_rw
     23.98            -0.1       23.87        perf-profile.children.cycles-pp._copy_to_iter
     24.25            -0.1       24.14        perf-profile.children.cycles-pp.copy_page_to_iter
      3.16            -0.1        3.10        perf-profile.children.cycles-pp.enqueue_task_fair
      2.61            -0.0        2.57        perf-profile.children.cycles-pp.update_load_avg
      1.78            -0.0        1.74        perf-profile.children.cycles-pp.prepare_task_switch
      0.28            -0.0        0.24        perf-profile.children.cycles-pp.update_rq_clock_task
      2.31            -0.0        2.28        perf-profile.children.cycles-pp.syscall_exit_to_user_mode
      0.38            -0.0        0.35        perf-profile.children.cycles-pp.wake_affine
      0.82            -0.0        0.79        perf-profile.children.cycles-pp.update_rq_clock
      0.89            -0.0        0.86        perf-profile.children.cycles-pp.asm_sysvec_call_function_single
      1.43            -0.0        1.40        perf-profile.children.cycles-pp.switch_fpu_return
      0.10 ±  4%      -0.0        0.08 ±  3%  perf-profile.children.cycles-pp.cpuacct_charge
      0.21 ±  2%      -0.0        0.19 ±  2%  perf-profile.children.cycles-pp.task_h_load
      0.13 ±  3%      -0.0        0.11        perf-profile.children.cycles-pp.wakeup_preempt
      0.95            -0.0        0.93        perf-profile.children.cycles-pp.prepare_to_wait_event
      0.16            +0.0        0.17        perf-profile.children.cycles-pp.tick_nohz_idle_enter
      0.62            +0.0        0.63        perf-profile.children.cycles-pp.entry_SYSCALL_64
      0.29            +0.0        0.30        perf-profile.children.cycles-pp.nohz_run_idle_balance
      0.92            +0.0        0.94        perf-profile.children.cycles-pp.mod_node_page_state
      0.25            +0.0        0.27        perf-profile.children.cycles-pp.update_min_vruntime
      0.77            +0.0        0.79        perf-profile.children.cycles-pp.__switch_to_asm
      0.46            +0.0        0.48        perf-profile.children.cycles-pp.llist_reverse_order
      6.27            +0.0        6.30        perf-profile.children.cycles-pp.cpuidle_enter
      0.48 ±  2%      +0.0        0.52 ±  2%  perf-profile.children.cycles-pp.pick_next_task_idle
      0.47 ±  2%      +0.0        0.51 ±  2%  perf-profile.children.cycles-pp.__update_idle_core
      0.81            +0.0        0.85        perf-profile.children.cycles-pp.sched_mm_cid_migrate_to
      0.09 ±  6%      +0.0        0.13 ±  5%  perf-profile.children.cycles-pp.generic_perform_write
      3.52            +0.0        3.57        perf-profile.children.cycles-pp.schedule_idle
      5.40            +0.0        5.45        perf-profile.children.cycles-pp._copy_from_iter
      0.00            +0.1        0.05 ±  5%  perf-profile.children.cycles-pp.copy_page_from_iter_atomic
      0.09 ±  6%      +0.1        0.14 ±  7%  perf-profile.children.cycles-pp.shmem_file_write_iter
      5.64            +0.1        5.69        perf-profile.children.cycles-pp.copy_page_from_iter
      0.00            +0.1        0.06 ±  7%  perf-profile.children.cycles-pp.ring_buffer_read_head
      0.12 ±  6%      +0.1        0.18 ±  6%  perf-profile.children.cycles-pp.record__pushfn
      6.80            +0.1        6.86        perf-profile.children.cycles-pp.cpuidle_idle_call
      0.12 ±  6%      +0.1        0.18 ±  6%  perf-profile.children.cycles-pp.writen
      0.00            +0.1        0.07 ± 10%  perf-profile.children.cycles-pp.perf_mmap__read_head
      7.43            +0.1        7.51        perf-profile.children.cycles-pp.select_idle_cpu
      9.00            +0.1        9.09        perf-profile.children.cycles-pp.select_task_rq_fair
      9.37            +0.1        9.46        perf-profile.children.cycles-pp.select_task_rq
      0.18 ±  5%      +0.1        0.29 ±  6%  perf-profile.children.cycles-pp.perf_mmap__push
      0.19 ±  5%      +0.1        0.30 ±  6%  perf-profile.children.cycles-pp.record__mmap_read_evlist
      0.19 ±  5%      +0.1        0.30 ±  6%  perf-profile.children.cycles-pp.cmd_record
      0.19 ±  6%      +0.1        0.31 ±  6%  perf-profile.children.cycles-pp.main
      0.19 ±  6%      +0.1        0.31 ±  6%  perf-profile.children.cycles-pp.run_builtin
      8.50            +0.1        8.62        perf-profile.children.cycles-pp.select_idle_sibling
     10.12            +0.1       10.24        perf-profile.children.cycles-pp.__x64_sys_process_vm_writev
     10.80            +0.1       10.92        perf-profile.children.cycles-pp.process_vm_writev
      4.92            +0.1        5.07        perf-profile.children.cycles-pp.sched_ttwu_pending
      5.43            +0.1        5.58        perf-profile.children.cycles-pp.flush_smp_call_function_queue
      5.54            +0.2        5.70        perf-profile.children.cycles-pp.__flush_smp_call_function_queue
     16.66            +0.3       16.96        perf-profile.children.cycles-pp.common_startup_64
     16.66            +0.3       16.96        perf-profile.children.cycles-pp.cpu_startup_entry
     16.63            +0.3       16.93        perf-profile.children.cycles-pp.do_idle
     16.58            +0.3       16.89        perf-profile.children.cycles-pp.start_secondary
      0.24            -0.2        0.08        perf-profile.self.cycles-pp.native_queued_spin_lock_slowpath
     23.76            -0.1       23.65        perf-profile.self.cycles-pp._copy_to_iter
      1.59            -0.0        1.54        perf-profile.self.cycles-pp.prepare_task_switch
      1.31            -0.0        1.28        perf-profile.self.cycles-pp.update_load_avg
      0.36            -0.0        0.33        perf-profile.self.cycles-pp.switch_fpu_return
      0.24 ±  2%      -0.0        0.21 ±  2%  perf-profile.self.cycles-pp.update_rq_clock_task
      0.70            -0.0        0.67        perf-profile.self.cycles-pp.update_rq_clock
      5.43            -0.0        5.40        perf-profile.self.cycles-pp.intel_idle
      0.21 ±  2%      -0.0        0.18 ±  2%  perf-profile.self.cycles-pp.task_h_load
      0.10            -0.0        0.08        perf-profile.self.cycles-pp.cpuacct_charge
      0.17            -0.0        0.15 ±  3%  perf-profile.self.cycles-pp.ttwu_queue_wakelist
      0.27            -0.0        0.26        perf-profile.self.cycles-pp.try_to_wake_up
      0.13            -0.0        0.12        perf-profile.self.cycles-pp.pick_next_task_fair
      0.22            -0.0        0.21        perf-profile.self.cycles-pp.set_task_cpu
      0.07            -0.0        0.06        perf-profile.self.cycles-pp.wakeup_preempt
      0.16 ±  2%      +0.0        0.18 ±  2%  perf-profile.self.cycles-pp.menu_select
      0.78            +0.0        0.80        perf-profile.self.cycles-pp.__switch_to
      0.49            +0.0        0.50        perf-profile.self.cycles-pp.call_function_single_prep_ipi
      0.84            +0.0        0.85        perf-profile.self.cycles-pp.mod_node_page_state
      0.24 ±  2%      +0.0        0.26        perf-profile.self.cycles-pp.remove_entity_load_avg
      0.24            +0.0        0.26 ±  2%  perf-profile.self.cycles-pp.update_min_vruntime
      0.46            +0.0        0.48        perf-profile.self.cycles-pp.llist_reverse_order
      0.55            +0.0        0.57        perf-profile.self.cycles-pp.enqueue_entity
      0.76            +0.0        0.79        perf-profile.self.cycles-pp.__switch_to_asm
      0.37 ±  3%      +0.0        0.40 ±  2%  perf-profile.self.cycles-pp.__update_idle_core
      0.81            +0.0        0.85        perf-profile.self.cycles-pp.sched_mm_cid_migrate_to
      1.12            +0.0        1.16        perf-profile.self.cycles-pp.select_idle_core
      5.34            +0.0        5.39        perf-profile.self.cycles-pp._copy_from_iter
      0.48            +0.1        0.53        perf-profile.self.cycles-pp.select_idle_cpu
      0.00            +0.1        0.05 ±  5%  perf-profile.self.cycles-pp.copy_page_from_iter_atomic
      0.00            +0.1        0.06 ± 10%  perf-profile.self.cycles-pp.ring_buffer_read_head




Disclaimer:
Results have been estimated based on internal Intel analysis and are provided
for informational purposes only. Any difference in system hardware or software
design or configuration may affect actual performance.


-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki


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