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Date:   Fri, 6 May 2022 15:36:37 +0000
From:   "Luck, Tony" <tony.luck@...el.com>
To:     "Sang, Oliver" <oliver.sang@...el.com>
CC:     Thomas Gleixner <tglx@...utronix.de>,
        LKML <linux-kernel@...r.kernel.org>,
        "x86@...nel.org" <x86@...nel.org>,
        "lkp@...ts.01.org" <lkp@...ts.01.org>, lkp <lkp@...el.com>,
        "Huang, Ying" <ying.huang@...el.com>,
        "Tang, Feng" <feng.tang@...el.com>,
        "zhengjun.xing@...ux.intel.com" <zhengjun.xing@...ux.intel.com>,
        "Yin, Fengwei" <fengwei.yin@...el.com>
Subject: RE: [x86/split_lock]  b041b525da:  stress-ng.lockbus.ops_per_sec
 -48.3% regression

Only -43.8%? That just sounds like I made life "pretty unpleasant", not "miserable" :-)

This regression is expected. No plans to fix it.

You might look into a benchmark that measures performance of other applications while this
stress-ng.lockbus.ops_per_sec is running. The intent of this patch is to reduce the impact
of bus locks on the rest of the system.

-Tony

-----Original Message-----
From: Sang, Oliver <oliver.sang@...el.com> 
Sent: Friday, May 06, 2022 1:43 AM
To: Luck, Tony <tony.luck@...el.com>
Cc: Thomas Gleixner <tglx@...utronix.de>; LKML <linux-kernel@...r.kernel.org>; x86@...nel.org; lkp@...ts.01.org; lkp <lkp@...el.com>; Huang, Ying <ying.huang@...el.com>; Tang, Feng <feng.tang@...el.com>; zhengjun.xing@...ux.intel.com; Yin, Fengwei <fengwei.yin@...el.com>
Subject: [x86/split_lock] b041b525da: stress-ng.lockbus.ops_per_sec -48.3% regression



Greeting,

FYI, we noticed a -48.3% regression of stress-ng.lockbus.ops_per_sec due to commit:


commit: b041b525dab95352fbd666b14dc73ab898df465f ("x86/split_lock: Make life miserable for split lockers")
https://git.kernel.org/cgit/linux/kernel/git/tip/tip.git x86/splitlock

in testcase: stress-ng
on test machine: 128 threads 2 sockets Intel(R) Xeon(R) Platinum 8358 CPU @ 2.60GHz with 128G memory
with following parameters:

	nr_threads: 100%
	testtime: 60s
	class: memory
	test: lockbus
	cpufreq_governor: performance
	ucode: 0xd000331




If you fix the issue, kindly add following tag
Reported-by: kernel test robot <oliver.sang@...el.com>


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


To reproduce:

        git clone https://github.com/intel/lkp-tests.git
        cd lkp-tests
        sudo bin/lkp install job.yaml           # job file is attached in this email
        bin/lkp split-job --compatible job.yaml # generate the yaml file for lkp run
        sudo bin/lkp run generated-yaml-file

        # if come across any failure that blocks the test,
        # please remove ~/.lkp and /lkp dir to run from a clean state.

=========================================================================================
class/compiler/cpufreq_governor/kconfig/nr_threads/rootfs/tbox_group/test/testcase/testtime/ucode:
  memory/gcc-11/performance/x86_64-rhel-8.3/100%/debian-10.4-x86_64-20200603.cgz/lkp-icl-2sp6/lockbus/stress-ng/60s/0xd000331

commit: 
  v5.18-rc4
  b041b525da ("x86/split_lock: Make life miserable for split lockers")

       v5.18-rc4 b041b525dab95352fbd666b14dc 
---------------- --------------------------- 
         %stddev     %change         %stddev
             \          |                \  
     84375           -48.3%      43587 ±  3%  stress-ng.lockbus.ops
      1400           -48.3%     723.64 ±  3%  stress-ng.lockbus.ops_per_sec
     46977 ±  2%     -61.4%      18141 ± 11%  stress-ng.time.involuntary_context_switches
      7779           -98.7%      97.67        stress-ng.time.percent_of_cpu_this_job_got
    251.13 ± 21%     -99.3%       1.80 ±  3%  stress-ng.time.system_time
      4660           -98.7%      59.55        stress-ng.time.user_time
    431.40 ± 10%   +8470.7%      36974 ± 11%  stress-ng.time.voluntary_context_switches
    293203           +12.9%     331056        meminfo.AnonHugePages
      4712 ±  3%    +156.4%      12081        uptime.idle
 5.616e+08 ±  2%   +1311.6%  7.927e+09        cpuidle..time
   1017813 ± 20%   +1502.7%   16312100        cpuidle..usage
      6.44 ±  8%     +90.9       97.30        mpstat.cpu.all.idle%
     34.59 ±  7%     -32.8        1.76 ± 31%  mpstat.cpu.all.irq%
      0.89 ± 13%      -0.8        0.09 ± 44%  mpstat.cpu.all.soft%
      5.10 ±  8%      -5.0        0.07 ±  3%  mpstat.cpu.all.sys%
     52.99 ±  6%     -52.2        0.78        mpstat.cpu.all.usr%
    878964 ±  5%     +10.8%     974067        numa-meminfo.node0.Shmem
   1018902 ±  7%     +16.1%    1183099 ±  5%  numa-meminfo.node1.Inactive
   1018902 ±  7%     +16.1%    1183099 ±  5%  numa-meminfo.node1.Inactive(anon)
    842061 ±  6%     +17.5%     989596 ±  2%  numa-meminfo.node1.Mapped
    848272 ±  5%     +15.2%     976855        numa-meminfo.node1.Shmem
      9.80 ±  4%    +886.4%      96.67        vmstat.cpu.id
     50.00 ±  6%    -100.0%       0.00        vmstat.cpu.us
    121.40           -99.2%       1.00        vmstat.procs.r
      2548           +34.1%       3418 ± 10%  vmstat.system.cs
    144004 ±  9%     +74.3%     250999        vmstat.system.in
    282203 ±  4%     +14.8%     323935 ±  5%  numa-vmstat.node0.nr_inactive_anon
    211496 ±  6%     +16.6%     246585 ±  2%  numa-vmstat.node0.nr_mapped
    206680 ±  5%     +18.9%     245754 ±  2%  numa-vmstat.node0.nr_shmem
    282195 ±  4%     +14.8%     323935 ±  5%  numa-vmstat.node0.nr_zone_inactive_anon
    240558 ±  8%     +24.0%     298317 ±  5%  numa-vmstat.node1.nr_inactive_anon
    197879 ±  7%     +26.2%     249742 ±  2%  numa-vmstat.node1.nr_mapped
      1642 ± 40%     +27.4%       2093 ± 40%  numa-vmstat.node1.nr_page_table_pages
    199997 ±  6%     +23.2%     246443        numa-vmstat.node1.nr_shmem
    240505 ±  8%     +24.0%     298317 ±  5%  numa-vmstat.node1.nr_zone_inactive_anon
      3066           -97.4%      78.67 ± 19%  turbostat.Avg_MHz
     93.28           -89.2        4.07 ± 22%  turbostat.Busy%
      3296           -40.8%       1952 ±  5%  turbostat.Bzy_MHz
    781444 ± 54%   +1628.9%   13510398 ± 28%  turbostat.C1E
      4.23 ± 61%     +64.0       68.28 ± 57%  turbostat.C1E%
      4.44 ± 55%   +1453.3%      69.03 ± 55%  turbostat.CPU%c1
     63.20           -16.4%      52.83 ±  4%  turbostat.CoreTmp
   8352767 ±  8%     +97.6%   16501874        turbostat.IRQ
     63.00 ±  2%     -16.1%      52.83 ±  2%  turbostat.PkgTmp
    375.56           -39.9%     225.74 ±  6%  turbostat.PkgWatt
    121375            +7.5%     130425        proc-vmstat.nr_anon_pages
    987453            +7.0%    1056187        proc-vmstat.nr_file_pages
    537372           +14.8%     616827        proc-vmstat.nr_inactive_anon
    422895           +16.2%     491550        proc-vmstat.nr_mapped
      4107 ±  2%      +6.8%       4385 ±  2%  proc-vmstat.nr_page_table_pages
    418750           +16.4%     487474        proc-vmstat.nr_shmem
    537370           +14.8%     616827        proc-vmstat.nr_zone_inactive_anon
      3330 ± 61%     -99.7%      11.50 ±186%  proc-vmstat.numa_hint_faults
      2035 ± 59%     -99.9%       1.67 ±197%  proc-vmstat.numa_hint_faults_local
   1002524            +4.6%    1048399        proc-vmstat.numa_hit
    886626            +5.0%     931095        proc-vmstat.numa_local
      5946 ±116%     -98.4%      95.00 ±223%  proc-vmstat.numa_pages_migrated
    493749 ±  3%     -99.8%     853.33 ±223%  proc-vmstat.numa_pte_updates
   1001222            +4.6%    1046837        proc-vmstat.pgalloc_normal
    841720            +8.6%     914206        proc-vmstat.pgfault
    775048           +18.1%     915055        proc-vmstat.pgfree
      5946 ±116%     -98.4%      95.00 ±223%  proc-vmstat.pgmigrate_success
     17361           +54.0%      26742        proc-vmstat.pgreuse
 5.129e+08 ±  7%     -41.1%  3.022e+08 ±  2%  perf-stat.i.branch-instructions
      0.95 ± 11%      +3.6        4.58 ± 99%  perf-stat.i.branch-miss-rate%
   2382071 ±  7%     -44.4%    1324699 ±  8%  perf-stat.i.cache-misses
      2539 ±  2%     +20.4%       3057 ± 12%  perf-stat.i.context-switches
    426.49 ±  4%     -97.6%      10.23 ± 13%  perf-stat.i.cpi
    139782            -8.4%     128033        perf-stat.i.cpu-clock
 2.639e+11           -95.8%  1.118e+10 ± 11%  perf-stat.i.cpu-cycles
    752036 ±  5%     -98.0%      14941 ± 26%  perf-stat.i.cycles-between-cache-misses
 5.608e+08 ±  9%     -32.0%  3.812e+08        perf-stat.i.dTLB-loads
      0.41 ±  6%      -0.3        0.13 ±118%  perf-stat.i.dTLB-store-miss-rate%
 2.391e+08 ±  9%     -20.5%    1.9e+08        perf-stat.i.dTLB-stores
  2.44e+09 ±  9%     -38.9%   1.49e+09 ±  2%  perf-stat.i.instructions
     54.70 ±  5%     -77.1%      12.51        perf-stat.i.major-faults
      1.88 ±  2%     -95.4%       0.09 ± 11%  perf-stat.i.metric.GHz
    944.84 ± 19%     -64.4%     336.04 ±112%  perf-stat.i.metric.K/sec
      8.61 ±  8%     -20.7%       6.83        perf-stat.i.metric.M/sec
     10898 ±  6%     -58.0%       4579        perf-stat.i.minor-faults
     65.86 ±  4%     +18.6       84.51        perf-stat.i.node-load-miss-rate%
    141261 ±  8%     +56.6%     221158 ± 15%  perf-stat.i.node-load-misses
     91471 ±  5%     -46.1%      49309 ± 16%  perf-stat.i.node-loads
     89300 ± 11%     -54.1%      40980 ± 21%  perf-stat.i.node-store-misses
   1212554 ±  7%     -57.6%     514245 ±  4%  perf-stat.i.node-stores
     10953 ±  6%     -58.1%       4591        perf-stat.i.page-faults
    139787            -8.4%     128033        perf-stat.i.task-clock
    254.01 ±  8%     -97.0%       7.52 ± 12%  perf-stat.overall.cpi
    286326 ±  9%     -97.0%       8577 ± 19%  perf-stat.overall.cycles-between-cache-misses
      0.00 ±  9%   +3300.4%       0.13 ± 11%  perf-stat.overall.ipc
     61.44 ±  9%     +20.3       81.74        perf-stat.overall.node-load-miss-rate%
  1.77e+08 ±  9%     +67.8%   2.97e+08 ±  2%  perf-stat.ps.branch-instructions
   2702583 ± 18%    +329.2%   11598999 ± 82%  perf-stat.ps.branch-misses
    716805 ± 10%     +81.6%    1301900 ±  8%  perf-stat.ps.cache-misses
      1459 ±  5%    +106.1%       3008 ± 12%  perf-stat.ps.context-switches
     95205 ±  8%     +32.3%     125997        perf-stat.ps.cpu-clock
 2.037e+11 ±  7%     -94.6%    1.1e+10 ± 11%  perf-stat.ps.cpu-cycles
    120.76 ±  7%     +42.3%     171.90 ±  9%  perf-stat.ps.cpu-migrations
 2.002e+08 ± 10%     +87.2%  3.748e+08        perf-stat.ps.dTLB-loads
  89201266 ± 11%    +109.5%  1.868e+08        perf-stat.ps.dTLB-stores
 8.074e+08 ± 10%     +81.4%  1.465e+09 ±  2%  perf-stat.ps.instructions
      3184 ±  8%     +41.1%       4492        perf-stat.ps.minor-faults
     61589 ± 10%    +253.4%     217652 ± 15%  perf-stat.ps.node-load-misses
     29168 ±  6%     +38.2%      40305 ± 21%  perf-stat.ps.node-store-misses
    303641 ± 13%     +66.2%     504661 ±  4%  perf-stat.ps.node-stores
      3198 ±  8%     +40.8%       4504        perf-stat.ps.page-faults
     95207 ±  8%     +32.3%     125997        perf-stat.ps.task-clock
  4.66e+10 ± 12%     +99.4%  9.294e+10 ±  2%  perf-stat.total.instructions
     32354 ± 57%     -99.8%      61.76 ± 70%  sched_debug.cfs_rq:/.MIN_vruntime.avg
   2247989 ± 26%     -99.8%       5064 ± 56%  sched_debug.cfs_rq:/.MIN_vruntime.max
    247145 ± 39%     -99.8%     537.60 ± 62%  sched_debug.cfs_rq:/.MIN_vruntime.stddev
      0.57 ±  4%     -83.4%       0.10 ± 28%  sched_debug.cfs_rq:/.h_nr_running.avg
     32354 ± 57%     -99.8%      61.76 ± 70%  sched_debug.cfs_rq:/.max_vruntime.avg
   2247991 ± 26%     -99.8%       5064 ± 56%  sched_debug.cfs_rq:/.max_vruntime.max
    247145 ± 39%     -99.8%     537.60 ± 62%  sched_debug.cfs_rq:/.max_vruntime.stddev
   2763104           -99.7%       8913 ± 36%  sched_debug.cfs_rq:/.min_vruntime.avg
   3358182 ±  4%     -99.3%      24400 ± 13%  sched_debug.cfs_rq:/.min_vruntime.max
   1538537 ± 12%     -99.8%       2844 ± 28%  sched_debug.cfs_rq:/.min_vruntime.min
    156471 ±  5%     -97.6%       3686 ± 24%  sched_debug.cfs_rq:/.min_vruntime.stddev
      0.55 ±  3%     -82.7%       0.10 ± 28%  sched_debug.cfs_rq:/.nr_running.avg
    119.88 ± 20%     +55.8%     186.73 ± 29%  sched_debug.cfs_rq:/.removed.load_avg.stddev
     59.29 ± 28%     +51.4%      89.77 ± 30%  sched_debug.cfs_rq:/.removed.util_avg.stddev
    665.61           -64.8%     234.43 ± 18%  sched_debug.cfs_rq:/.runnable_avg.avg
      1886 ±  8%     -37.4%       1181 ± 16%  sched_debug.cfs_rq:/.runnable_avg.max
    528967 ±  9%    -101.6%      -8642        sched_debug.cfs_rq:/.spread0.avg
   1119786 ± 10%     -99.4%       6842 ± 55%  sched_debug.cfs_rq:/.spread0.max
   -715437           -97.9%     -14712        sched_debug.cfs_rq:/.spread0.min
    152488 ±  7%     -97.6%       3686 ± 24%  sched_debug.cfs_rq:/.spread0.stddev
    628.76           -62.8%     233.60 ± 18%  sched_debug.cfs_rq:/.util_avg.avg
      1585 ± 13%     -25.6%       1179 ± 16%  sched_debug.cfs_rq:/.util_avg.max
    303.61 ±  3%     -93.0%      21.11 ± 34%  sched_debug.cfs_rq:/.util_est_enqueued.avg
      1127           -32.9%     756.50 ± 18%  sched_debug.cfs_rq:/.util_est_enqueued.max
    206.96 ±  4%     -51.3%     100.87 ± 22%  sched_debug.cfs_rq:/.util_est_enqueued.stddev
   2525689 ± 11%     -64.2%     903412 ±  2%  sched_debug.cpu.avg_idle.avg
   6234029 ±  9%     -79.7%    1266582 ± 16%  sched_debug.cpu.avg_idle.max
    299393 ± 18%     -95.8%      12702 ±196%  sched_debug.cpu.avg_idle.min
   1331474 ± 13%     -86.1%     185160 ± 11%  sched_debug.cpu.avg_idle.stddev
     68351           -39.0%      41714 ± 24%  sched_debug.cpu.clock.avg
     68613           -39.2%      41719 ± 24%  sched_debug.cpu.clock.max
     67731           -38.4%      41708 ± 24%  sched_debug.cpu.clock.min
    275.33 ± 28%     -98.9%       3.00 ± 33%  sched_debug.cpu.clock.stddev
      1145 ± 11%     -58.0%     481.20 ± 36%  sched_debug.cpu.clock_task.stddev
      3293 ±  2%     -89.3%     352.66 ± 26%  sched_debug.cpu.curr->pid.avg
   1704382 ±  8%     -70.6%     501841        sched_debug.cpu.max_idle_balance_cost.avg
   3528217 ±  7%     -80.3%     695415 ± 14%  sched_debug.cpu.max_idle_balance_cost.max
    638236 ± 16%     -97.1%      18481 ± 54%  sched_debug.cpu.max_idle_balance_cost.stddev
      0.00 ± 37%     -97.0%       0.00 ± 32%  sched_debug.cpu.next_balance.stddev
      0.57 ±  3%     -83.3%       0.10 ± 26%  sched_debug.cpu.nr_running.avg
      2.40 ±  8%     -51.4%       1.17 ± 31%  sched_debug.cpu.nr_running.max
      0.34 ±  4%     -13.2%       0.29 ± 15%  sched_debug.cpu.nr_running.stddev
     67624           -38.3%      41712 ± 24%  sched_debug.cpu_clk
     66904           -38.7%      40993 ± 24%  sched_debug.ktime
      0.00          -100.0%       0.00        sched_debug.rt_rq:/.rt_nr_migratory.avg
      0.50          -100.0%       0.00        sched_debug.rt_rq:/.rt_nr_migratory.max
      0.04          -100.0%       0.00        sched_debug.rt_rq:/.rt_nr_migratory.stddev
      0.00 ± 33%    -100.0%       0.00        sched_debug.rt_rq:/.rt_nr_running.avg
      0.50          -100.0%       0.00        sched_debug.rt_rq:/.rt_nr_running.max
      0.05 ± 15%    -100.0%       0.00        sched_debug.rt_rq:/.rt_nr_running.stddev
      2.18 ± 19%    -100.0%       0.00        sched_debug.rt_rq:/.rt_time.avg
    273.15 ± 24%    -100.0%       0.00        sched_debug.rt_rq:/.rt_time.max
     24.05 ± 24%    -100.0%       0.00        sched_debug.rt_rq:/.rt_time.stddev
     68997           -37.0%      43458 ± 25%  sched_debug.sched_clk
    128.87 ± 15%    -122.8        6.06 ± 45%  perf-profile.calltrace.cycles-pp.asm_sysvec_apic_timer_interrupt.stress_lockbus
     43.54 ± 21%     -18.7       24.80 ± 11%  perf-profile.calltrace.cycles-pp.stress_lockbus
     15.57 ±  3%     -15.6        0.00        perf-profile.calltrace.cycles-pp.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt.stress_lockbus
     13.77 ±  3%     -13.8        0.00        perf-profile.calltrace.cycles-pp.__sysvec_apic_timer_interrupt.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt.stress_lockbus
     13.65 ±  3%     -13.7        0.00        perf-profile.calltrace.cycles-pp.hrtimer_interrupt.__sysvec_apic_timer_interrupt.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt.stress_lockbus
     10.18 ±  7%      -5.4        4.76 ± 55%  perf-profile.calltrace.cycles-pp.__hrtimer_run_queues.hrtimer_interrupt.__sysvec_apic_timer_interrupt.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt
      6.71 ± 12%      -3.7        2.97 ± 54%  perf-profile.calltrace.cycles-pp.tick_sched_timer.__hrtimer_run_queues.hrtimer_interrupt.__sysvec_apic_timer_interrupt.sysvec_apic_timer_interrupt
      5.91 ± 14%      -3.6        2.32 ± 55%  perf-profile.calltrace.cycles-pp.update_process_times.tick_sched_handle.tick_sched_timer.__hrtimer_run_queues.hrtimer_interrupt
      6.06 ± 14%      -3.5        2.54 ± 60%  perf-profile.calltrace.cycles-pp.tick_sched_handle.tick_sched_timer.__hrtimer_run_queues.hrtimer_interrupt.__sysvec_apic_timer_interrupt
      4.80 ± 15%      -3.5        1.31 ± 44%  perf-profile.calltrace.cycles-pp.scheduler_tick.update_process_times.tick_sched_handle.tick_sched_timer.__hrtimer_run_queues
      2.12 ± 10%      -1.3        0.84 ± 46%  perf-profile.calltrace.cycles-pp.perf_mux_hrtimer_handler.__hrtimer_run_queues.hrtimer_interrupt.__sysvec_apic_timer_interrupt.sysvec_apic_timer_interrupt
      2.01 ±  8%      -0.5        1.49 ± 19%  perf-profile.calltrace.cycles-pp.clockevents_program_event.hrtimer_interrupt.__sysvec_apic_timer_interrupt.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt
      0.58 ±  6%      +0.4        1.02 ± 20%  perf-profile.calltrace.cycles-pp.rebalance_domains.__softirqentry_text_start.__irq_exit_rcu.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt
      0.00            +0.6        0.61 ±  7%  perf-profile.calltrace.cycles-pp.lapic_next_deadline.clockevents_program_event.hrtimer_interrupt.__sysvec_apic_timer_interrupt.sysvec_apic_timer_interrupt
      0.00            +0.7        0.70 ± 22%  perf-profile.calltrace.cycles-pp.load_balance.rebalance_domains.__softirqentry_text_start.__irq_exit_rcu.sysvec_apic_timer_interrupt
      0.00            +0.8        0.78 ± 37%  perf-profile.calltrace.cycles-pp.ktime_get.tick_irq_enter.irq_enter_rcu.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt
      0.00            +1.2        1.17 ± 27%  perf-profile.calltrace.cycles-pp.tick_irq_enter.irq_enter_rcu.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt.cpuidle_enter_state
      0.00            +1.2        1.21 ± 26%  perf-profile.calltrace.cycles-pp.irq_enter_rcu.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt.cpuidle_enter_state.cpuidle_enter
      0.00            +1.4        1.38 ± 12%  perf-profile.calltrace.cycles-pp.tick_nohz_next_event.tick_nohz_get_sleep_length.menu_select.cpuidle_idle_call.do_idle
      0.00            +1.9        1.87 ± 28%  perf-profile.calltrace.cycles-pp.__softirqentry_text_start.__irq_exit_rcu.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt.cpuidle_enter_state
      0.00            +2.1        2.10 ±  6%  perf-profile.calltrace.cycles-pp.tick_nohz_get_sleep_length.menu_select.cpuidle_idle_call.do_idle.cpu_startup_entry
      0.00            +2.8        2.84 ± 14%  perf-profile.calltrace.cycles-pp.__irq_exit_rcu.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt.cpuidle_enter_state.cpuidle_enter
      0.00            +4.4        4.42 ± 18%  perf-profile.calltrace.cycles-pp.menu_select.cpuidle_idle_call.do_idle.cpu_startup_entry.secondary_startup_64_no_verify
      0.00            +7.3        7.34 ± 36%  perf-profile.calltrace.cycles-pp.hrtimer_interrupt.__sysvec_apic_timer_interrupt.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt.cpuidle_enter_state
      0.00            +7.5        7.53 ± 38%  perf-profile.calltrace.cycles-pp.__sysvec_apic_timer_interrupt.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt.cpuidle_enter_state.cpuidle_enter
      0.00           +12.6       12.59 ± 31%  perf-profile.calltrace.cycles-pp.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt.cpuidle_enter_state.cpuidle_enter.cpuidle_idle_call
      0.00           +15.9       15.90 ± 26%  perf-profile.calltrace.cycles-pp.asm_sysvec_apic_timer_interrupt.cpuidle_enter_state.cpuidle_enter.cpuidle_idle_call.do_idle
      0.00           +47.0       47.02 ±  8%  perf-profile.calltrace.cycles-pp.mwait_idle_with_hints.intel_idle.cpuidle_enter_state.cpuidle_enter.cpuidle_idle_call
      0.00           +47.2       47.21 ±  8%  perf-profile.calltrace.cycles-pp.intel_idle.cpuidle_enter_state.cpuidle_enter.cpuidle_idle_call.do_idle
      0.00           +65.0       64.98 ±  3%  perf-profile.calltrace.cycles-pp.cpuidle_enter_state.cpuidle_enter.cpuidle_idle_call.do_idle.cpu_startup_entry
      0.00           +65.3       65.26 ±  3%  perf-profile.calltrace.cycles-pp.cpuidle_enter.cpuidle_idle_call.do_idle.cpu_startup_entry.secondary_startup_64_no_verify
      0.00           +70.6       70.57 ±  4%  perf-profile.calltrace.cycles-pp.cpuidle_idle_call.do_idle.cpu_startup_entry.secondary_startup_64_no_verify
      0.00           +71.3       71.30 ±  4%  perf-profile.calltrace.cycles-pp.do_idle.cpu_startup_entry.secondary_startup_64_no_verify
      0.00           +71.4       71.39 ±  4%  perf-profile.calltrace.cycles-pp.cpu_startup_entry.secondary_startup_64_no_verify
      0.00           +72.0       71.98 ±  4%  perf-profile.calltrace.cycles-pp.secondary_startup_64_no_verify
     95.06           -68.0       27.09 ± 12%  perf-profile.children.cycles-pp.stress_lockbus
     80.12 ± 13%     -61.7       18.47 ± 23%  perf-profile.children.cycles-pp.asm_sysvec_apic_timer_interrupt
     14.64 ±  3%      -7.2        7.48 ± 36%  perf-profile.children.cycles-pp.hrtimer_interrupt
     14.76 ±  3%      -7.1        7.66 ± 38%  perf-profile.children.cycles-pp.__sysvec_apic_timer_interrupt
     10.91 ±  7%      -6.1        4.86 ± 54%  perf-profile.children.cycles-pp.__hrtimer_run_queues
      7.20 ± 12%      -4.2        3.02 ± 54%  perf-profile.children.cycles-pp.tick_sched_timer
      6.33 ± 14%      -4.0        2.38 ± 55%  perf-profile.children.cycles-pp.update_process_times
      6.48 ± 14%      -3.9        2.58 ± 60%  perf-profile.children.cycles-pp.tick_sched_handle
      5.18 ± 15%      -3.8        1.35 ± 43%  perf-profile.children.cycles-pp.scheduler_tick
      2.95 ±  9%      -2.5        0.43 ± 17%  perf-profile.children.cycles-pp.entry_SYSCALL_64_after_hwframe
      2.95 ±  9%      -2.5        0.43 ± 17%  perf-profile.children.cycles-pp.do_syscall_64
      2.32 ± 10%      -1.4        0.87 ± 43%  perf-profile.children.cycles-pp.perf_mux_hrtimer_handler
      1.61 ±  5%      -1.3        0.27 ± 10%  perf-profile.children.cycles-pp.__intel_pmu_enable_all
      1.37 ± 12%      -1.3        0.07 ± 55%  perf-profile.children.cycles-pp.update_load_avg
      1.41 ±  2%      -1.3        0.15 ± 28%  perf-profile.children.cycles-pp.error_entry
      1.46 ±  4%      -0.9        0.56 ± 21%  perf-profile.children.cycles-pp.native_sched_clock
      0.82 ± 10%      -0.7        0.10 ± 27%  perf-profile.children.cycles-pp.asm_exc_page_fault
      2.21 ±  8%      -0.7        1.52 ± 18%  perf-profile.children.cycles-pp.clockevents_program_event
      0.71 ±  9%      -0.6        0.09 ± 28%  perf-profile.children.cycles-pp.exc_page_fault
      0.70 ±  9%      -0.6        0.09 ± 27%  perf-profile.children.cycles-pp.do_user_addr_fault
      0.58 ±  7%      -0.5        0.08 ± 29%  perf-profile.children.cycles-pp.handle_mm_fault
      0.53 ±  7%      -0.5        0.08 ± 35%  perf-profile.children.cycles-pp.__handle_mm_fault
      0.53 ± 10%      -0.5        0.07 ± 39%  perf-profile.children.cycles-pp.__update_load_avg_cfs_rq
      0.51 ±  4%      -0.4        0.09 ± 11%  perf-profile.children.cycles-pp.__x64_sys_execve
      0.51 ±  3%      -0.4        0.09 ± 11%  perf-profile.children.cycles-pp.do_execveat_common
      0.50 ±  2%      -0.4        0.09 ± 11%  perf-profile.children.cycles-pp.execve
      0.67 ± 17%      -0.4        0.28 ± 30%  perf-profile.children.cycles-pp.ret_from_fork
      0.65 ± 17%      -0.4        0.28 ± 31%  perf-profile.children.cycles-pp.kthread
      0.76 ± 10%      -0.3        0.41 ± 41%  perf-profile.children.cycles-pp.update_rq_clock
      0.40 ±  4%      -0.3        0.07 ± 18%  perf-profile.children.cycles-pp.bprm_execve
      0.36 ±  4%      -0.3        0.06 ± 46%  perf-profile.children.cycles-pp.exec_binprm
      0.35 ±  7%      -0.3        0.04 ± 73%  perf-profile.children.cycles-pp.exit_mmap
      0.36 ±  4%      -0.3        0.06 ± 46%  perf-profile.children.cycles-pp.search_binary_handler
      0.36 ±  3%      -0.3        0.06 ± 46%  perf-profile.children.cycles-pp.load_elf_binary
      0.35 ±  6%      -0.3        0.05 ± 48%  perf-profile.children.cycles-pp.mmput
      0.40 ±  7%      -0.3        0.12 ± 20%  perf-profile.children.cycles-pp.__schedule
      0.36 ±  8%      -0.3        0.08 ± 19%  perf-profile.children.cycles-pp.schedule
      0.72 ±  5%      -0.3        0.45 ± 27%  perf-profile.children.cycles-pp._raw_spin_lock
      0.30 ±  3%      -0.3        0.03 ±100%  perf-profile.children.cycles-pp.__x64_sys_openat
      0.30 ±  4%      -0.3        0.03 ±100%  perf-profile.children.cycles-pp.do_sys_openat2
      0.34 ±  8%      -0.3        0.08 ± 36%  perf-profile.children.cycles-pp.ksys_read
      0.33 ±  7%      -0.3        0.08 ± 37%  perf-profile.children.cycles-pp.vfs_read
      0.38 ±  2%      -0.2        0.13 ± 27%  perf-profile.children.cycles-pp._raw_spin_lock_irq
      0.27 ±  2%      -0.2        0.03 ±100%  perf-profile.children.cycles-pp.do_filp_open
      0.27 ±  2%      -0.2        0.03 ±100%  perf-profile.children.cycles-pp.path_openat
      0.65 ± 13%      -0.2        0.45 ±  9%  perf-profile.children.cycles-pp.ktime_get_update_offsets_now
      0.33 ± 17%      -0.2        0.16 ± 55%  perf-profile.children.cycles-pp.process_one_work
      0.35 ± 17%      -0.2        0.18 ± 42%  perf-profile.children.cycles-pp.worker_thread
      0.12 ± 10%      -0.1        0.02 ± 99%  perf-profile.children.cycles-pp.smpboot_thread_fn
      0.20 ±  7%      -0.1        0.11 ± 33%  perf-profile.children.cycles-pp._raw_spin_unlock_irqrestore
      0.07 ±  9%      +0.0        0.10 ± 20%  perf-profile.children.cycles-pp.cpumask_next_and
      0.02 ±122%      +0.1        0.07 ± 28%  perf-profile.children.cycles-pp.update_group_capacity
      0.00            +0.1        0.06 ± 19%  perf-profile.children.cycles-pp.cpuidle_reflect
      0.13 ±  7%      +0.1        0.20 ± 27%  perf-profile.children.cycles-pp._raw_spin_trylock
      0.00            +0.1        0.07 ± 23%  perf-profile.children.cycles-pp.sched_clock
      0.00            +0.1        0.10 ± 26%  perf-profile.children.cycles-pp.arch_cpu_idle_exit
      0.00            +0.1        0.11 ± 41%  perf-profile.children.cycles-pp.rcu_eqs_enter
      0.01 ±200%      +0.1        0.12 ± 28%  perf-profile.children.cycles-pp.__libc_start_main
      0.01 ±200%      +0.1        0.12 ± 28%  perf-profile.children.cycles-pp.main
      0.01 ±200%      +0.1        0.12 ± 28%  perf-profile.children.cycles-pp.run_builtin
      0.24 ±  4%      +0.1        0.36 ± 11%  perf-profile.children.cycles-pp.update_sg_lb_stats
      0.00            +0.1        0.12 ± 47%  perf-profile.children.cycles-pp.calc_global_load_tick
      0.00            +0.1        0.12 ± 13%  perf-profile.children.cycles-pp.menu_reflect
      0.00            +0.1        0.13 ± 67%  perf-profile.children.cycles-pp.tick_nohz_tick_stopped
      0.00            +0.1        0.14 ± 26%  perf-profile.children.cycles-pp.call_cpuidle
      0.00            +0.2        0.15 ± 25%  perf-profile.children.cycles-pp.rcu_dynticks_inc
      0.00            +0.2        0.18 ± 58%  perf-profile.children.cycles-pp.timerqueue_iterate_next
      0.00            +0.2        0.19 ± 42%  perf-profile.children.cycles-pp.io_serial_in
      0.23 ± 13%      +0.2        0.44 ± 17%  perf-profile.children.cycles-pp.__hrtimer_next_event_base
      0.03 ± 82%      +0.2        0.26 ± 45%  perf-profile.children.cycles-pp.__update_blocked_fair
      0.33 ±  6%      +0.2        0.56 ± 10%  perf-profile.children.cycles-pp.update_sd_lb_stats
      0.00            +0.2        0.24 ± 65%  perf-profile.children.cycles-pp.nr_iowait_cpu
      0.34 ±  6%      +0.3        0.59 ± 11%  perf-profile.children.cycles-pp.find_busiest_group
      0.00            +0.3        0.25 ± 46%  perf-profile.children.cycles-pp.serial8250_console_putchar
      0.52 ±  7%      +0.3        0.78 ± 17%  perf-profile.children.cycles-pp.load_balance
      0.39 ± 15%      +0.3        0.64 ±  7%  perf-profile.children.cycles-pp.lapic_next_deadline
      0.00            +0.3        0.26 ± 43%  perf-profile.children.cycles-pp.wait_for_xmitr
      0.00            +0.3        0.26 ± 44%  perf-profile.children.cycles-pp.uart_console_write
      0.22 ± 10%      +0.3        0.48 ± 48%  perf-profile.children.cycles-pp.update_blocked_averages
      0.00            +0.3        0.27 ± 44%  perf-profile.children.cycles-pp.serial8250_console_write
      0.00            +0.3        0.27 ± 18%  perf-profile.children.cycles-pp.hrtimer_get_next_event
      0.23 ± 11%      +0.3        0.50 ± 50%  perf-profile.children.cycles-pp.run_rebalance_domains
      0.00            +0.3        0.27 ± 42%  perf-profile.children.cycles-pp.console_unlock
      0.00            +0.3        0.27 ± 42%  perf-profile.children.cycles-pp.call_console_drivers
      0.03 ± 82%      +0.3        0.31 ± 42%  perf-profile.children.cycles-pp.irq_work_run_list
      0.00            +0.3        0.28 ± 42%  perf-profile.children.cycles-pp._printk
      0.00            +0.3        0.28 ± 42%  perf-profile.children.cycles-pp.vprintk_emit
      0.00            +0.3        0.28 ± 42%  perf-profile.children.cycles-pp.asm_sysvec_irq_work
      0.00            +0.3        0.28 ± 42%  perf-profile.children.cycles-pp.sysvec_irq_work
      0.00            +0.3        0.28 ± 42%  perf-profile.children.cycles-pp.__sysvec_irq_work
      0.00            +0.3        0.28 ± 42%  perf-profile.children.cycles-pp.irq_work_run
      0.00            +0.3        0.28 ± 42%  perf-profile.children.cycles-pp.irq_work_single
      0.00            +0.3        0.29 ± 55%  perf-profile.children.cycles-pp.rcu_eqs_exit
      0.00            +0.3        0.31 ± 16%  perf-profile.children.cycles-pp.tsc_verify_tsc_adjust
      0.00            +0.3        0.32 ± 18%  perf-profile.children.cycles-pp.arch_cpu_idle_enter
      0.00            +0.3        0.33 ± 63%  perf-profile.children.cycles-pp.cpuidle_governor_latency_req
      0.20 ± 13%      +0.4        0.56 ±  6%  perf-profile.children.cycles-pp.read_tsc
      0.67 ±  6%      +0.4        1.06 ± 18%  perf-profile.children.cycles-pp.rebalance_domains
      0.00            +0.4        0.41 ± 16%  perf-profile.children.cycles-pp.tick_nohz_irq_exit
      0.00            +0.4        0.43 ± 23%  perf-profile.children.cycles-pp.timekeeping_max_deferment
      0.00            +0.5        0.48 ± 19%  perf-profile.children.cycles-pp.get_next_timer_interrupt
      0.00            +0.5        0.51 ± 45%  perf-profile.children.cycles-pp.rcu_idle_exit
      1.40 ± 15%      +0.5        1.94 ± 27%  perf-profile.children.cycles-pp.__softirqentry_text_start
      0.10 ± 11%      +0.5        0.65 ± 45%  perf-profile.children.cycles-pp.idle_cpu
      0.00            +0.6        0.59 ±  9%  perf-profile.children.cycles-pp.hrtimer_next_event_without
      0.00            +0.6        0.60 ± 14%  perf-profile.children.cycles-pp.start_kernel
      1.43 ±  9%      +0.8        2.20 ± 29%  perf-profile.children.cycles-pp.ktime_get
      0.00            +0.9        0.94 ± 13%  perf-profile.children.cycles-pp.native_irq_return_iret
      1.92 ± 10%      +1.0        2.92 ± 13%  perf-profile.children.cycles-pp.__irq_exit_rcu
      0.00            +1.2        1.20 ± 27%  perf-profile.children.cycles-pp.tick_irq_enter
      0.00            +1.2        1.23 ± 27%  perf-profile.children.cycles-pp.irq_enter_rcu
      0.00            +1.4        1.41 ± 12%  perf-profile.children.cycles-pp.tick_nohz_next_event
      0.00            +2.1        2.14 ±  6%  perf-profile.children.cycles-pp.tick_nohz_get_sleep_length
      0.00            +4.5        4.50 ± 18%  perf-profile.children.cycles-pp.menu_select
      0.00           +47.4       47.42 ±  8%  perf-profile.children.cycles-pp.mwait_idle_with_hints
      0.00           +47.6       47.62 ±  8%  perf-profile.children.cycles-pp.intel_idle
      0.00           +65.6       65.64 ±  3%  perf-profile.children.cycles-pp.cpuidle_enter_state
      0.00           +65.8       65.83 ±  3%  perf-profile.children.cycles-pp.cpuidle_enter
      0.00           +71.2       71.22 ±  4%  perf-profile.children.cycles-pp.cpuidle_idle_call
      0.01 ±200%     +72.0       71.98 ±  4%  perf-profile.children.cycles-pp.secondary_startup_64_no_verify
      0.01 ±200%     +72.0       71.98 ±  4%  perf-profile.children.cycles-pp.cpu_startup_entry
      0.01 ±200%     +72.0       71.98 ±  4%  perf-profile.children.cycles-pp.do_idle
     66.95           -41.4       25.58 ± 13%  perf-profile.self.cycles-pp.stress_lockbus
      5.20 ± 24%      -3.5        1.73 ± 55%  perf-profile.self.cycles-pp.asm_sysvec_apic_timer_interrupt
      1.56 ±  5%      -1.3        0.27 ± 10%  perf-profile.self.cycles-pp.__intel_pmu_enable_all
      1.31 ± 13%      -1.2        0.09 ± 36%  perf-profile.self.cycles-pp.clockevents_program_event
      1.44 ±  4%      -0.9        0.52 ± 19%  perf-profile.self.cycles-pp.native_sched_clock
      0.45 ± 10%      -0.4        0.07 ± 39%  perf-profile.self.cycles-pp.__update_load_avg_cfs_rq
      0.42 ± 10%      -0.3        0.14 ± 30%  perf-profile.self.cycles-pp.error_entry
      0.61 ± 13%      -0.3        0.34 ± 13%  perf-profile.self.cycles-pp.ktime_get_update_offsets_now
      0.36 ±  3%      -0.2        0.12 ± 31%  perf-profile.self.cycles-pp._raw_spin_lock_irq
      0.12 ± 10%      -0.1        0.04 ±105%  perf-profile.self.cycles-pp.tick_sched_timer
      0.02 ±125%      +0.1        0.09 ± 35%  perf-profile.self.cycles-pp.__softirqentry_text_start
      0.00            +0.1        0.07 ± 27%  perf-profile.self.cycles-pp.update_group_capacity
      0.00            +0.1        0.08 ± 27%  perf-profile.self.cycles-pp.menu_reflect
      0.29 ±  8%      +0.1        0.38 ± 11%  perf-profile.self.cycles-pp._raw_spin_lock_irqsave
      0.11 ±  9%      +0.1        0.20 ± 27%  perf-profile.self.cycles-pp._raw_spin_trylock
      0.00            +0.1        0.09 ± 17%  perf-profile.self.cycles-pp.sched_clock_cpu
      0.18 ±  6%      +0.1        0.27 ± 15%  perf-profile.self.cycles-pp.update_sg_lb_stats
      0.00            +0.1        0.10 ± 36%  perf-profile.self.cycles-pp.rcu_eqs_enter
      0.00            +0.1        0.10 ± 22%  perf-profile.self.cycles-pp.update_sd_lb_stats
      0.02 ±122%      +0.1        0.13 ± 37%  perf-profile.self.cycles-pp.load_balance
      0.05            +0.1        0.16 ± 61%  perf-profile.self.cycles-pp.rebalance_domains
      0.00            +0.1        0.12 ± 26%  perf-profile.self.cycles-pp.tick_nohz_get_sleep_length
      0.00            +0.1        0.12 ± 51%  perf-profile.self.cycles-pp.cpuidle_governor_latency_req
      0.00            +0.1        0.12 ± 48%  perf-profile.self.cycles-pp.calc_global_load_tick
      0.00            +0.1        0.13 ± 27%  perf-profile.self.cycles-pp.call_cpuidle
      0.00            +0.1        0.13 ± 36%  perf-profile.self.cycles-pp.cpuidle_enter
      0.02 ±122%      +0.1        0.16 ± 87%  perf-profile.self.cycles-pp.sysvec_apic_timer_interrupt
      0.00            +0.1        0.14 ± 24%  perf-profile.self.cycles-pp.rcu_dynticks_inc
      0.00            +0.1        0.14 ± 64%  perf-profile.self.cycles-pp.get_next_timer_interrupt
      0.00            +0.1        0.15 ± 25%  perf-profile.self.cycles-pp.hrtimer_get_next_event
      0.00            +0.2        0.15 ± 58%  perf-profile.self.cycles-pp.__update_blocked_fair
      0.00            +0.2        0.17 ±  4%  perf-profile.self.cycles-pp.hrtimer_next_event_without
      0.00            +0.2        0.18 ± 61%  perf-profile.self.cycles-pp.timerqueue_iterate_next
      0.00            +0.2        0.19 ± 60%  perf-profile.self.cycles-pp.rcu_eqs_exit
      0.00            +0.2        0.19 ± 42%  perf-profile.self.cycles-pp.io_serial_in
      0.00            +0.2        0.20 ± 36%  perf-profile.self.cycles-pp.do_idle
      0.00            +0.2        0.20 ± 19%  perf-profile.self.cycles-pp.rcu_idle_exit
      0.00            +0.2        0.21 ± 27%  perf-profile.self.cycles-pp.intel_idle
      0.00            +0.2        0.23 ± 69%  perf-profile.self.cycles-pp.nr_iowait_cpu
      0.00            +0.3        0.26 ± 15%  perf-profile.self.cycles-pp.tsc_verify_tsc_adjust
      0.37 ± 15%      +0.3        0.64 ±  7%  perf-profile.self.cycles-pp.lapic_next_deadline
      0.00            +0.4        0.38 ± 18%  perf-profile.self.cycles-pp.cpuidle_idle_call
      0.16 ± 16%      +0.4        0.54 ±  6%  perf-profile.self.cycles-pp.read_tsc
      0.00            +0.4        0.42 ± 37%  perf-profile.self.cycles-pp.tick_nohz_next_event
      0.00            +0.4        0.42 ± 26%  perf-profile.self.cycles-pp.timekeeping_max_deferment
      0.09 ± 12%      +0.6        0.64 ± 45%  perf-profile.self.cycles-pp.idle_cpu
      0.00            +0.9        0.94 ± 13%  perf-profile.self.cycles-pp.native_irq_return_iret
      0.00            +1.9        1.93 ± 28%  perf-profile.self.cycles-pp.menu_select
      0.00            +2.5        2.48 ± 16%  perf-profile.self.cycles-pp.cpuidle_enter_state
      0.00           +47.4       47.40 ±  8%  perf-profile.self.cycles-pp.mwait_idle_with_hints




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://01.org/lkp


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