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Date:   Mon, 2 Nov 2020 17:15:43 +0800
From:   kernel test robot <rong.a.chen@...el.com>
To:     Waiman Long <longman@...hat.com>
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Shakeel Butt <shakeelb@...gle.com>,
        Michal Hocko <mhocko@...e.com>,
        Chris Down <chris@...isdown.name>,
        Johannes Weiner <hannes@...xchg.org>,
        Roman Gushchin <guro@...com>, Tejun Heo <tj@...nel.org>,
        Vladimir Davydov <vdavydov.dev@...il.com>,
        Yafang Shao <laoar.shao@...il.com>,
        LKML <linux-kernel@...r.kernel.org>, lkp@...ts.01.org,
        lkp@...el.com, ying.huang@...el.com, feng.tang@...el.com,
        zhengjun.xing@...el.com
Subject: [mm/memcg] bd0b230fe1: will-it-scale.per_process_ops -22.7%
 regression

Greeting,

FYI, we noticed a -22.7% regression of will-it-scale.per_process_ops due to commit:


commit: bd0b230fe14554bfffbae54e19038716f96f5a41 ("mm/memcg: unify swap and memsw page counters")
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master


in testcase: will-it-scale
on test machine: 144 threads Intel(R) Xeon(R) CPU E7-8890 v3 @ 2.50GHz with 512G memory
with following parameters:

	nr_task: 50%
	mode: process
	test: page_fault2
	cpufreq_governor: performance
	ucode: 0x16

test-description: Will It Scale takes a testcase and runs it from 1 through to n parallel copies to see if the testcase will scale. It builds both a process and threads based test in order to see any differences between the two.
test-url: https://github.com/antonblanchard/will-it-scale



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


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


To reproduce:

        git clone https://github.com/intel/lkp-tests.git
        cd lkp-tests
        bin/lkp install job.yaml  # job file is attached in this email
        bin/lkp run     job.yaml

=========================================================================================
compiler/cpufreq_governor/kconfig/mode/nr_task/rootfs/tbox_group/test/testcase/ucode:
  gcc-9/performance/x86_64-rhel-8.3/process/50%/debian-10.4-x86_64-20200603.cgz/lkp-hsw-4ex1/page_fault2/will-it-scale/0x16

commit: 
  8d387a5f17 ("mm/memcg: simplify mem_cgroup_get_max()")
  bd0b230fe1 ("mm/memcg: unify swap and memsw page counters")

8d387a5f172f26ff bd0b230fe14554bfffbae54e190 
---------------- --------------------------- 
       fail:runs  %reproduction    fail:runs
           |             |             |    
          5:5          -23%           4:5     perf-profile.calltrace.cycles-pp.error_entry.testcase
          5:5          -23%           4:5     perf-profile.children.cycles-pp.error_entry
          5:5          -19%           4:5     perf-profile.self.cycles-pp.error_entry
         %stddev     %change         %stddev
             \          |                \  
    187666           -22.7%     145157        will-it-scale.per_process_ops
  13511995           -22.7%   10451324        will-it-scale.workload
   1895023 ±196%     -98.7%      24188 ±  4%  cpuidle.POLL.time
    280275 ±192%     -97.3%       7540 ±  3%  cpuidle.POLL.usage
     34107 ± 26%     -27.5%      24740 ± 10%  numa-meminfo.node1.KReclaimable
      4234 ± 11%     -15.6%       3573 ±  2%  numa-meminfo.node1.PageTables
     34107 ± 26%     -27.5%      24740 ± 10%  numa-meminfo.node1.SReclaimable
   1195173            +1.2%    1209077        proc-vmstat.nr_anon_pages
      4325            -2.3%       4223        proc-vmstat.nr_page_table_pages
  4.07e+09           -22.6%  3.149e+09        proc-vmstat.numa_hit
 4.069e+09           -22.6%  3.149e+09        proc-vmstat.numa_local
 4.072e+09           -22.6%  3.151e+09        proc-vmstat.pgalloc_normal
 4.059e+09           -22.6%  3.141e+09        proc-vmstat.pgfault
 4.069e+09           -22.6%  3.147e+09        proc-vmstat.pgfree
 1.395e+09        -9.9e+07   1.296e+09 ±  5%  syscalls.sys_mmap.noise.75%
 2.512e+09 ± 17%  +1.2e+09   3.667e+09 ± 13%  syscalls.sys_write.noise.100%
 2.526e+09 ± 17%  +1.2e+09   3.684e+09 ± 13%  syscalls.sys_write.noise.2%
 2.523e+09 ± 17%  +1.2e+09   3.681e+09 ± 13%  syscalls.sys_write.noise.25%
 2.525e+09 ± 17%  +1.2e+09   3.684e+09 ± 13%  syscalls.sys_write.noise.5%
  2.52e+09 ± 17%  +1.2e+09   3.677e+09 ± 13%  syscalls.sys_write.noise.50%
 2.516e+09 ± 17%  +1.2e+09   3.672e+09 ± 13%  syscalls.sys_write.noise.75%
 1.029e+09           -21.7%  8.052e+08 ±  2%  numa-numastat.node0.local_node
 1.029e+09           -21.7%  8.053e+08 ±  2%  numa-numastat.node0.numa_hit
  1.02e+09           -23.0%  7.853e+08        numa-numastat.node1.local_node
  1.02e+09           -23.0%  7.853e+08        numa-numastat.node1.numa_hit
 1.013e+09           -22.8%  7.817e+08        numa-numastat.node2.local_node
 1.013e+09           -22.8%  7.818e+08        numa-numastat.node2.numa_hit
 1.011e+09           -23.1%  7.771e+08 ±  2%  numa-numastat.node3.local_node
 1.011e+09           -23.1%  7.772e+08 ±  2%  numa-numastat.node3.numa_hit
      9210 ±  8%     +12.5%      10362 ±  8%  softirqs.CPU13.RCU
     20302 ±  8%     +31.3%      26656 ± 10%  softirqs.CPU142.SCHED
     16688 ± 16%     +52.8%      25498 ± 29%  softirqs.CPU15.SCHED
     17137 ± 23%     +62.3%      27811 ± 12%  softirqs.CPU20.SCHED
     23421 ± 21%     -40.4%      13969 ± 33%  softirqs.CPU36.SCHED
     23782 ±  7%     -29.0%      16876 ± 17%  softirqs.CPU70.SCHED
     27401 ±  9%     -34.4%      17978 ± 42%  softirqs.CPU87.SCHED
     25692 ± 13%     -44.6%      14223 ± 20%  softirqs.CPU92.SCHED
 5.114e+08           -21.6%  4.012e+08 ±  2%  numa-vmstat.node0.numa_hit
 5.114e+08           -21.6%  4.012e+08 ±  2%  numa-vmstat.node0.numa_local
      1058 ± 11%     -15.6%     893.00 ±  2%  numa-vmstat.node1.nr_page_table_pages
      8526 ± 26%     -27.5%       6184 ± 10%  numa-vmstat.node1.nr_slab_reclaimable
 5.074e+08           -22.9%   3.91e+08        numa-vmstat.node1.numa_hit
 5.073e+08           -22.9%  3.909e+08        numa-vmstat.node1.numa_local
  5.04e+08           -22.7%  3.895e+08        numa-vmstat.node2.numa_hit
 5.039e+08           -22.7%  3.894e+08        numa-vmstat.node2.numa_local
 5.029e+08           -23.0%   3.87e+08 ±  2%  numa-vmstat.node3.numa_hit
 5.028e+08           -23.1%  3.869e+08 ±  2%  numa-vmstat.node3.numa_local
      6778 ± 54%     -98.0%     135.96 ± 62%  sched_debug.cfs_rq:/.exec_clock.min
     29780 ±  6%     +52.2%      45320 ±  6%  sched_debug.cfs_rq:/.exec_clock.stddev
    528699 ± 51%     -94.3%      30214 ± 19%  sched_debug.cfs_rq:/.min_vruntime.min
   2205697 ±  6%     +52.3%    3359526 ±  6%  sched_debug.cfs_rq:/.min_vruntime.stddev
     17.95 ±  5%     -37.5%      11.22 ±  2%  sched_debug.cfs_rq:/.nr_spread_over.avg
     59.80 ± 28%     -40.5%      35.60 ± 24%  sched_debug.cfs_rq:/.nr_spread_over.max
      1.80 ± 38%    -100.0%       0.00        sched_debug.cfs_rq:/.nr_spread_over.min
      8.78 ±  5%     -16.2%       7.36 ±  7%  sched_debug.cfs_rq:/.nr_spread_over.stddev
   2205731 ±  6%     +52.3%    3359553 ±  6%  sched_debug.cfs_rq:/.spread0.stddev
     23138 ±  2%     +39.2%      32199 ± 18%  sched_debug.cpu.nr_switches.max
      3068 ±  3%     +19.9%       3680 ± 10%  sched_debug.cpu.nr_switches.stddev
     19891 ±  4%     +47.3%      29292 ± 20%  sched_debug.cpu.sched_count.max
    694.57 ±  4%     -12.4%     608.67 ±  3%  sched_debug.cpu.sched_count.min
      2602 ±  4%     +28.2%       3335 ± 10%  sched_debug.cpu.sched_count.stddev
      9769 ±  4%     +48.7%      14531 ± 21%  sched_debug.cpu.sched_goidle.max
     25.50 ± 22%     -51.2%      12.43 ± 10%  sched_debug.cpu.sched_goidle.min
      1315 ±  4%     +29.2%       1699 ±  9%  sched_debug.cpu.sched_goidle.stddev
    259.50 ±  2%     -16.7%     216.20 ±  5%  sched_debug.cpu.ttwu_count.min
    233.47           -12.9%     203.27 ±  3%  sched_debug.cpu.ttwu_local.min
    136.40 ± 22%     -41.3%      80.00 ± 35%  interrupts.CPU1.RES:Rescheduling_interrupts
    445.80 ± 49%     +54.3%     688.00        interrupts.CPU116.CAL:Function_call_interrupts
      2384 ± 39%     +77.2%       4225 ± 26%  interrupts.CPU116.NMI:Non-maskable_interrupts
      2384 ± 39%     +77.2%       4225 ± 26%  interrupts.CPU116.PMI:Performance_monitoring_interrupts
      3140 ± 25%     +82.5%       5732 ± 36%  interrupts.CPU12.NMI:Non-maskable_interrupts
      3140 ± 25%     +82.5%       5732 ± 36%  interrupts.CPU12.PMI:Performance_monitoring_interrupts
      6641 ± 17%     -48.0%       3452 ± 40%  interrupts.CPU128.NMI:Non-maskable_interrupts
      6641 ± 17%     -48.0%       3452 ± 40%  interrupts.CPU128.PMI:Performance_monitoring_interrupts
      6211 ± 25%     -41.3%       3643 ± 40%  interrupts.CPU14.NMI:Non-maskable_interrupts
      6211 ± 25%     -41.3%       3643 ± 40%  interrupts.CPU14.PMI:Performance_monitoring_interrupts
    156.20 ± 19%     -60.4%      61.80 ± 45%  interrupts.CPU15.RES:Rescheduling_interrupts
    450.60 ± 61%    +314.9%       1869 ±110%  interrupts.CPU17.CAL:Function_call_interrupts
    401.20 ± 62%    +105.1%     823.00 ± 28%  interrupts.CPU2.CAL:Function_call_interrupts
      3781 ± 29%     +91.4%       7239 ± 22%  interrupts.CPU23.NMI:Non-maskable_interrupts
      3781 ± 29%     +91.4%       7239 ± 22%  interrupts.CPU23.PMI:Performance_monitoring_interrupts
    131.20 ± 16%     -38.3%      81.00 ± 37%  interrupts.CPU23.RES:Rescheduling_interrupts
      6565 ± 27%     -47.8%       3430 ± 57%  interrupts.CPU30.NMI:Non-maskable_interrupts
      6565 ± 27%     -47.8%       3430 ± 57%  interrupts.CPU30.PMI:Performance_monitoring_interrupts
      2524 ± 33%     +53.1%       3866 ± 18%  interrupts.CPU39.NMI:Non-maskable_interrupts
      2524 ± 33%     +53.1%       3866 ± 18%  interrupts.CPU39.PMI:Performance_monitoring_interrupts
      5453 ± 26%     -34.5%       3569 ± 27%  interrupts.CPU43.NMI:Non-maskable_interrupts
      5453 ± 26%     -34.5%       3569 ± 27%  interrupts.CPU43.PMI:Performance_monitoring_interrupts
      2524 ± 36%     +65.3%       4172 ± 28%  interrupts.CPU48.NMI:Non-maskable_interrupts
      2524 ± 36%     +65.3%       4172 ± 28%  interrupts.CPU48.PMI:Performance_monitoring_interrupts
    487.40 ± 58%    +124.0%       1092 ± 55%  interrupts.CPU79.CAL:Function_call_interrupts
    585.20 ± 40%     +61.9%     947.20 ± 23%  interrupts.CPU80.CAL:Function_call_interrupts
    487.60 ± 54%     +67.9%     818.80 ± 16%  interrupts.CPU81.CAL:Function_call_interrupts
     15.97           +11.6%      17.83        perf-stat.i.MPKI
 1.333e+10           -27.3%   9.69e+09        perf-stat.i.branch-instructions
      0.48            +0.1        0.53        perf-stat.i.branch-miss-rate%
  62963150           -20.1%   50310834        perf-stat.i.branch-misses
     37.28            -1.9       35.40        perf-stat.i.cache-miss-rate%
  4.08e+08           -21.8%  3.189e+08        perf-stat.i.cache-misses
 1.092e+09           -17.7%  8.983e+08        perf-stat.i.cache-references
      3.06           +35.8%       4.16        perf-stat.i.cpi
    143.56            -1.4%     141.50        perf-stat.i.cpu-migrations
    523.77           +28.4%     672.47        perf-stat.i.cycles-between-cache-misses
 2.068e+10           -25.8%  1.534e+10        perf-stat.i.dTLB-loads
  95643337           -22.7%   73905709        perf-stat.i.dTLB-store-misses
 1.225e+10           -22.1%  9.544e+09        perf-stat.i.dTLB-stores
     94.47            -2.1       92.36        perf-stat.i.iTLB-load-miss-rate%
  40594103           -23.3%   31146350        perf-stat.i.iTLB-load-misses
   2304247 ± 11%      +9.1%    2513651        perf-stat.i.iTLB-loads
 6.823e+10           -26.2%  5.033e+10        perf-stat.i.instructions
      1692            -3.6%       1632        perf-stat.i.instructions-per-iTLB-miss
      0.33           -26.3%       0.24        perf-stat.i.ipc
    332.55           -25.1%     249.20        perf-stat.i.metric.M/sec
  13449087           -22.7%   10398888        perf-stat.i.minor-faults
      4.30            +1.7        6.01        perf-stat.i.node-load-miss-rate%
  13864893           +11.3%   15438022        perf-stat.i.node-load-misses
 3.294e+08           -22.9%  2.539e+08        perf-stat.i.node-loads
     18.37            +0.4       18.79        perf-stat.i.node-store-miss-rate%
  11546036           -22.7%    8923297        perf-stat.i.node-store-misses
  51372725           -24.8%   38626751        perf-stat.i.node-stores
  13449089           -22.7%   10398890        perf-stat.i.page-faults
     16.00           +11.5%      17.85        perf-stat.overall.MPKI
      0.47            +0.0        0.52        perf-stat.overall.branch-miss-rate%
     37.36            -1.9       35.50        perf-stat.overall.cache-miss-rate%
      3.06           +35.9%       4.16        perf-stat.overall.cpi
    512.20           +28.3%     656.96        perf-stat.overall.cycles-between-cache-misses
     94.64            -2.1       92.54        perf-stat.overall.iTLB-load-miss-rate%
      1680            -3.9%       1616        perf-stat.overall.instructions-per-iTLB-miss
      0.33           -26.4%       0.24        perf-stat.overall.ipc
      4.04            +1.7        5.73        perf-stat.overall.node-load-miss-rate%
     18.35            +0.4       18.77        perf-stat.overall.node-store-miss-rate%
   1519587            -4.6%    1449452        perf-stat.overall.path-length
 1.329e+10           -27.3%  9.658e+09        perf-stat.ps.branch-instructions
  62761890           -20.1%   50132370        perf-stat.ps.branch-misses
 4.065e+08           -21.8%  3.178e+08        perf-stat.ps.cache-misses
 1.088e+09           -17.7%  8.953e+08        perf-stat.ps.cache-references
    142.33            -1.6%     140.11        perf-stat.ps.cpu-migrations
 2.061e+10           -25.8%  1.529e+10        perf-stat.ps.dTLB-loads
  95301115           -22.7%   73646080        perf-stat.ps.dTLB-store-misses
 1.221e+10           -22.1%  9.511e+09        perf-stat.ps.dTLB-stores
  40451925           -23.3%   31039602        perf-stat.ps.iTLB-load-misses
   2295342 ± 11%      +9.1%    2503862        perf-stat.ps.iTLB-loads
 6.799e+10           -26.2%  5.016e+10        perf-stat.ps.instructions
  13401817           -22.7%   10363171        perf-stat.ps.minor-faults
  13816941           +11.3%   15384985        perf-stat.ps.node-load-misses
 3.282e+08           -22.9%   2.53e+08        perf-stat.ps.node-loads
  11506624           -22.7%    8893312        perf-stat.ps.node-store-misses
  51195452           -24.8%   38495647        perf-stat.ps.node-stores
  13401819           -22.7%   10363173        perf-stat.ps.page-faults
 2.053e+13           -26.2%  1.515e+13        perf-stat.total.instructions
     11.81 ± 11%      -3.5        8.26 ± 10%  perf-profile.calltrace.cycles-pp.__munmap
     11.81 ± 11%      -3.5        8.26 ± 10%  perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe.__munmap
     11.80 ± 11%      -3.5        8.26 ± 10%  perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.__munmap
     11.80 ± 11%      -3.5        8.26 ± 10%  perf-profile.calltrace.cycles-pp.__do_munmap.__vm_munmap.__x64_sys_munmap.do_syscall_64.entry_SYSCALL_64_after_hwframe
     11.80 ± 11%      -3.5        8.26 ± 10%  perf-profile.calltrace.cycles-pp.__x64_sys_munmap.do_syscall_64.entry_SYSCALL_64_after_hwframe.__munmap
     11.80 ± 11%      -3.5        8.26 ± 10%  perf-profile.calltrace.cycles-pp.__vm_munmap.__x64_sys_munmap.do_syscall_64.entry_SYSCALL_64_after_hwframe.__munmap
     11.80 ± 11%      -3.5        8.25 ± 10%  perf-profile.calltrace.cycles-pp.unmap_region.__do_munmap.__vm_munmap.__x64_sys_munmap.do_syscall_64
     12.30 ± 10%      -3.4        8.86 ± 10%  perf-profile.calltrace.cycles-pp.finish_fault.do_fault.__handle_mm_fault.handle_mm_fault.do_user_addr_fault
     12.25 ± 10%      -3.4        8.83 ± 10%  perf-profile.calltrace.cycles-pp.alloc_set_pte.finish_fault.do_fault.__handle_mm_fault.handle_mm_fault
      8.17 ± 11%      -3.3        4.90 ± 10%  perf-profile.calltrace.cycles-pp.lru_cache_add.alloc_set_pte.finish_fault.do_fault.__handle_mm_fault
      8.04 ± 11%      -3.2        4.79 ± 10%  perf-profile.calltrace.cycles-pp.pagevec_lru_move_fn.lru_cache_add.alloc_set_pte.finish_fault.do_fault
     10.87 ± 11%      -3.2        7.63 ± 10%  perf-profile.calltrace.cycles-pp.unmap_vmas.unmap_region.__do_munmap.__vm_munmap.__x64_sys_munmap
     10.87 ± 11%      -3.2        7.63 ± 10%  perf-profile.calltrace.cycles-pp.unmap_page_range.unmap_vmas.unmap_region.__do_munmap.__vm_munmap
     10.86 ± 11%      -3.2        7.62 ± 10%  perf-profile.calltrace.cycles-pp.zap_pte_range.unmap_page_range.unmap_vmas.unmap_region.__do_munmap
      6.14 ± 11%      -3.0        3.18 ±  9%  perf-profile.calltrace.cycles-pp._raw_spin_lock_irqsave.pagevec_lru_move_fn.lru_cache_add.alloc_set_pte.finish_fault
      6.08 ± 11%      -2.9        3.14 ±  9%  perf-profile.calltrace.cycles-pp.native_queued_spin_lock_slowpath._raw_spin_lock_irqsave.pagevec_lru_move_fn.lru_cache_add.alloc_set_pte
      7.57 ± 12%      -2.7        4.88 ±  9%  perf-profile.calltrace.cycles-pp.tlb_flush_mmu.zap_pte_range.unmap_page_range.unmap_vmas.unmap_region
      7.14 ± 13%      -2.6        4.56 ±  9%  perf-profile.calltrace.cycles-pp.release_pages.tlb_flush_mmu.zap_pte_range.unmap_page_range.unmap_vmas
      3.95 ± 16%      -2.1        1.86 ±  7%  perf-profile.calltrace.cycles-pp._raw_spin_lock_irqsave.release_pages.tlb_flush_mmu.zap_pte_range.unmap_page_range
      3.93 ± 17%      -2.1        1.85 ±  7%  perf-profile.calltrace.cycles-pp.native_queued_spin_lock_slowpath._raw_spin_lock_irqsave.release_pages.tlb_flush_mmu.zap_pte_range
      3.25 ± 10%      -0.8        2.44 ± 10%  perf-profile.calltrace.cycles-pp.alloc_pages_vma.do_fault.__handle_mm_fault.handle_mm_fault.do_user_addr_fault
      2.86 ± 10%      -0.7        2.13 ±  9%  perf-profile.calltrace.cycles-pp.__alloc_pages_nodemask.alloc_pages_vma.do_fault.__handle_mm_fault.handle_mm_fault
      2.62 ± 10%      -0.7        1.93 ± 10%  perf-profile.calltrace.cycles-pp.get_page_from_freelist.__alloc_pages_nodemask.alloc_pages_vma.do_fault.__handle_mm_fault
      2.36 ± 11%      -0.7        1.71 ±  9%  perf-profile.calltrace.cycles-pp.rmqueue.get_page_from_freelist.__alloc_pages_nodemask.alloc_pages_vma.do_fault
      1.83 ± 11%      -0.6        1.23 ± 11%  perf-profile.calltrace.cycles-pp.try_charge.mem_cgroup_charge.do_fault.__handle_mm_fault.handle_mm_fault
      1.89 ± 11%      -0.6        1.32 ±  9%  perf-profile.calltrace.cycles-pp.rmqueue_bulk.rmqueue.get_page_from_freelist.__alloc_pages_nodemask.alloc_pages_vma
      1.76 ±  9%      -0.5        1.30 ± 10%  perf-profile.calltrace.cycles-pp.free_unref_page_list.release_pages.tlb_flush_mmu.zap_pte_range.unmap_page_range
      1.30 ± 12%      -0.4        0.86 ± 11%  perf-profile.calltrace.cycles-pp.page_counter_try_charge.try_charge.mem_cgroup_charge.do_fault.__handle_mm_fault
      1.53 ±  9%      -0.4        1.11 ± 10%  perf-profile.calltrace.cycles-pp.free_pcppages_bulk.free_unref_page_list.release_pages.tlb_flush_mmu.zap_pte_range
      0.92 ± 13%      -0.3        0.62 ± 10%  perf-profile.calltrace.cycles-pp.tlb_finish_mmu.unmap_region.__do_munmap.__vm_munmap.__x64_sys_munmap
      0.92 ± 13%      -0.3        0.62 ± 10%  perf-profile.calltrace.cycles-pp.tlb_flush_mmu.tlb_finish_mmu.unmap_region.__do_munmap.__vm_munmap
      0.89 ± 13%      -0.3        0.60 ± 10%  perf-profile.calltrace.cycles-pp.release_pages.tlb_flush_mmu.tlb_finish_mmu.unmap_region.__do_munmap
      1.02 ± 11%      -0.2        0.78 ±  9%  perf-profile.calltrace.cycles-pp.__list_del_entry_valid.rmqueue_bulk.rmqueue.get_page_from_freelist.__alloc_pages_nodemask
      1.03 ±  9%      -0.2        0.79 ± 10%  perf-profile.calltrace.cycles-pp.__irqentry_text_end.testcase
      0.98 ± 12%      +0.3        1.27 ± 13%  perf-profile.calltrace.cycles-pp.__mod_memcg_lruvec_state.page_add_new_anon_rmap.alloc_set_pte.finish_fault.do_fault
      1.42 ±  9%      +0.3        1.75 ±  9%  perf-profile.calltrace.cycles-pp.shmem_fault.__do_fault.do_fault.__handle_mm_fault.handle_mm_fault
      0.70 ± 13%      +0.4        1.10 ± 14%  perf-profile.calltrace.cycles-pp.__mod_memcg_state.__mod_memcg_lruvec_state.page_add_new_anon_rmap.alloc_set_pte.finish_fault
      1.23 ±  9%      +0.4        1.64 ± 10%  perf-profile.calltrace.cycles-pp.shmem_getpage_gfp.shmem_fault.__do_fault.do_fault.__handle_mm_fault
      1.05 ±  9%      +0.5        1.51 ±  9%  perf-profile.calltrace.cycles-pp.find_lock_entry.shmem_getpage_gfp.shmem_fault.__do_fault.do_fault
      0.71 ± 12%      +0.5        1.18 ± 13%  perf-profile.calltrace.cycles-pp.__count_memcg_events.handle_mm_fault.do_user_addr_fault.exc_page_fault.asm_exc_page_fault
      0.83 ±  9%      +0.5        1.34 ± 10%  perf-profile.calltrace.cycles-pp.find_get_entry.find_lock_entry.shmem_getpage_gfp.shmem_fault.__do_fault
      0.37 ± 81%      +0.6        0.93 ± 15%  perf-profile.calltrace.cycles-pp.mem_cgroup_charge_statistics.mem_cgroup_charge.do_fault.__handle_mm_fault.handle_mm_fault
      0.36 ± 81%      +0.6        0.91 ± 15%  perf-profile.calltrace.cycles-pp.__count_memcg_events.mem_cgroup_charge_statistics.mem_cgroup_charge.do_fault.__handle_mm_fault
      2.69 ±  9%      +4.3        6.95 ± 14%  perf-profile.calltrace.cycles-pp.get_mem_cgroup_from_mm.mem_cgroup_charge.do_fault.__handle_mm_fault.handle_mm_fault
      7.04 ±  9%     +10.2       17.26 ± 13%  perf-profile.calltrace.cycles-pp.mem_cgroup_charge.do_fault.__handle_mm_fault.handle_mm_fault.do_user_addr_fault
     11.69 ± 13%      -5.8        5.91 ±  8%  perf-profile.children.cycles-pp.native_queued_spin_lock_slowpath
     10.58 ± 13%      -5.3        5.29 ±  8%  perf-profile.children.cycles-pp._raw_spin_lock_irqsave
     11.81 ± 11%      -3.5        8.26 ± 10%  perf-profile.children.cycles-pp.__munmap
     11.80 ± 11%      -3.5        8.26 ± 10%  perf-profile.children.cycles-pp.__do_munmap
     11.80 ± 11%      -3.5        8.26 ± 10%  perf-profile.children.cycles-pp.__x64_sys_munmap
     11.80 ± 11%      -3.5        8.26 ± 10%  perf-profile.children.cycles-pp.__vm_munmap
     11.80 ± 11%      -3.5        8.26 ± 10%  perf-profile.children.cycles-pp.unmap_region
     11.88 ± 11%      -3.5        8.34 ± 10%  perf-profile.children.cycles-pp.do_syscall_64
     11.89 ± 11%      -3.5        8.35 ± 10%  perf-profile.children.cycles-pp.entry_SYSCALL_64_after_hwframe
     12.30 ± 10%      -3.4        8.86 ± 10%  perf-profile.children.cycles-pp.finish_fault
     12.26 ± 10%      -3.4        8.83 ± 10%  perf-profile.children.cycles-pp.alloc_set_pte
      8.18 ± 11%      -3.3        4.90 ± 10%  perf-profile.children.cycles-pp.lru_cache_add
      8.05 ± 11%      -3.2        4.80 ±  9%  perf-profile.children.cycles-pp.pagevec_lru_move_fn
     10.87 ± 11%      -3.2        7.63 ± 10%  perf-profile.children.cycles-pp.unmap_vmas
     10.87 ± 11%      -3.2        7.63 ± 10%  perf-profile.children.cycles-pp.unmap_page_range
     10.87 ± 11%      -3.2        7.63 ± 10%  perf-profile.children.cycles-pp.zap_pte_range
      8.49 ± 12%      -3.0        5.51 ±  9%  perf-profile.children.cycles-pp.tlb_flush_mmu
      8.20 ± 13%      -2.9        5.29 ±  9%  perf-profile.children.cycles-pp.release_pages
      3.91 ± 10%      -0.9        3.06 ±  9%  perf-profile.children.cycles-pp._raw_spin_lock
      3.27 ± 10%      -0.8        2.45 ± 10%  perf-profile.children.cycles-pp.alloc_pages_vma
      2.95 ± 10%      -0.7        2.20 ± 10%  perf-profile.children.cycles-pp.__alloc_pages_nodemask
      2.67 ± 10%      -0.7        1.98 ± 10%  perf-profile.children.cycles-pp.get_page_from_freelist
      2.39 ± 11%      -0.7        1.73 ±  9%  perf-profile.children.cycles-pp.rmqueue
      1.84 ± 11%      -0.6        1.23 ± 11%  perf-profile.children.cycles-pp.try_charge
      1.90 ± 11%      -0.6        1.33 ±  9%  perf-profile.children.cycles-pp.rmqueue_bulk
      2.01 ±  9%      -0.5        1.49 ± 10%  perf-profile.children.cycles-pp.free_unref_page_list
      1.74 ±  9%      -0.5        1.27 ± 10%  perf-profile.children.cycles-pp.free_pcppages_bulk
      1.32 ± 12%      -0.4        0.87 ± 12%  perf-profile.children.cycles-pp.page_counter_try_charge
      1.54 ± 10%      -0.3        1.22 ±  9%  perf-profile.children.cycles-pp.__list_del_entry_valid
      0.93 ± 13%      -0.3        0.62 ± 10%  perf-profile.children.cycles-pp.tlb_finish_mmu
      1.03 ±  9%      -0.2        0.79 ± 10%  perf-profile.children.cycles-pp.__irqentry_text_end
      0.43 ±  7%      -0.1        0.33 ± 10%  perf-profile.children.cycles-pp.free_pages_and_swap_cache
      0.41 ±  7%      -0.1        0.33 ± 10%  perf-profile.children.cycles-pp.__perf_sw_event
      0.41 ±  9%      -0.1        0.33 ±  8%  perf-profile.children.cycles-pp.xas_load
      0.31 ±  9%      -0.1        0.23 ±  6%  perf-profile.children.cycles-pp.__mod_lruvec_state
      0.25 ±  8%      -0.1        0.19 ± 10%  perf-profile.children.cycles-pp.___perf_sw_event
      0.22 ± 10%      -0.1        0.16 ±  6%  perf-profile.children.cycles-pp.__mod_node_page_state
      0.09 ± 21%      -0.0        0.05 ± 50%  perf-profile.children.cycles-pp._raw_spin_unlock_irqrestore
      0.22 ±  8%      -0.0        0.17 ±  9%  perf-profile.children.cycles-pp.sync_regs
      0.15 ± 10%      -0.0        0.11 ±  8%  perf-profile.children.cycles-pp.__list_add_valid
      0.13 ± 12%      -0.0        0.10 ±  8%  perf-profile.children.cycles-pp.memcg_check_events
      0.09 ±  8%      -0.0        0.06 ± 12%  perf-profile.children.cycles-pp.mem_cgroup_page_lruvec
      0.10 ±  9%      -0.0        0.08 ± 14%  perf-profile.children.cycles-pp.up_read
      0.11 ± 10%      -0.0        0.09 ± 12%  perf-profile.children.cycles-pp.shmem_get_policy
      0.10 ±  5%      -0.0        0.08 ± 13%  perf-profile.children.cycles-pp.unlock_page
      0.09 ± 11%      -0.0        0.07 ± 14%  perf-profile.children.cycles-pp._cond_resched
      0.09 ±  5%      -0.0        0.07 ± 17%  perf-profile.children.cycles-pp.find_vma
      0.25 ±  8%      +0.2        0.42 ± 14%  perf-profile.children.cycles-pp.mem_cgroup_uncharge_list
      0.11 ±  8%      +0.2        0.31 ± 15%  perf-profile.children.cycles-pp.uncharge_page
      0.15 ± 10%      +0.2        0.38 ± 12%  perf-profile.children.cycles-pp.lock_page_memcg
      1.42 ±  9%      +0.3        1.75 ±  9%  perf-profile.children.cycles-pp.shmem_fault
      0.57 ± 11%      +0.4        0.93 ± 15%  perf-profile.children.cycles-pp.mem_cgroup_charge_statistics
      1.24 ±  9%      +0.4        1.65 ±  9%  perf-profile.children.cycles-pp.shmem_getpage_gfp
      1.07 ±  9%      +0.5        1.52 ± 10%  perf-profile.children.cycles-pp.find_lock_entry
      0.84 ±  9%      +0.5        1.35 ± 10%  perf-profile.children.cycles-pp.find_get_entry
      1.70 ± 11%      +0.7        2.39 ±  9%  perf-profile.children.cycles-pp.native_irq_return_iret
      1.28 ± 11%      +0.8        2.11 ± 14%  perf-profile.children.cycles-pp.__count_memcg_events
      2.69 ±  9%      +4.3        6.98 ± 14%  perf-profile.children.cycles-pp.get_mem_cgroup_from_mm
      7.06 ±  9%     +10.2       17.28 ± 13%  perf-profile.children.cycles-pp.mem_cgroup_charge
     11.69 ± 13%      -5.8        5.91 ±  8%  perf-profile.self.cycles-pp.native_queued_spin_lock_slowpath
      2.90 ±  9%      -0.6        2.29 ± 10%  perf-profile.self.cycles-pp.testcase
      2.03 ±  8%      -0.5        1.55 ± 11%  perf-profile.self.cycles-pp.zap_pte_range
      1.07 ± 11%      -0.4        0.63 ± 11%  perf-profile.self.cycles-pp.__mod_memcg_lruvec_state
      1.21 ± 12%      -0.4        0.79 ± 11%  perf-profile.self.cycles-pp.page_counter_try_charge
      1.53 ± 10%      -0.3        1.21 ±  9%  perf-profile.self.cycles-pp.__list_del_entry_valid
      1.03 ±  9%      -0.2        0.79 ± 10%  perf-profile.self.cycles-pp.__irqentry_text_end
      1.05 ±  8%      -0.2        0.82 ± 10%  perf-profile.self.cycles-pp.free_pcppages_bulk
      0.53 ± 10%      -0.2        0.37 ± 12%  perf-profile.self.cycles-pp.try_charge
      0.43 ±  8%      -0.1        0.33 ± 10%  perf-profile.self.cycles-pp.free_pages_and_swap_cache
      0.46 ± 10%      -0.1        0.36 ± 10%  perf-profile.self.cycles-pp.release_pages
      0.46 ± 11%      -0.1        0.36 ±  8%  perf-profile.self.cycles-pp.__handle_mm_fault
      0.36 ±  8%      -0.1        0.29 ±  9%  perf-profile.self.cycles-pp.xas_load
      0.18 ± 10%      -0.1        0.11 ± 11%  perf-profile.self.cycles-pp.shmem_fault
      0.27 ±  9%      -0.1        0.20 ± 11%  perf-profile.self.cycles-pp.page_remove_rmap
      0.29 ±  9%      -0.1        0.23 ±  9%  perf-profile.self.cycles-pp.handle_mm_fault
      0.14 ± 10%      -0.1        0.09 ± 11%  perf-profile.self.cycles-pp.page_add_new_anon_rmap
      0.21 ±  8%      -0.1        0.16 ±  4%  perf-profile.self.cycles-pp.__mod_node_page_state
      0.08 ± 17%      -0.0        0.03 ± 82%  perf-profile.self.cycles-pp.memcg_check_events
      0.16 ±  9%      -0.0        0.12 ±  9%  perf-profile.self.cycles-pp.shmem_getpage_gfp
      0.19 ±  8%      -0.0        0.15 ±  9%  perf-profile.self.cycles-pp.sync_regs
      0.19 ±  8%      -0.0        0.14 ± 11%  perf-profile.self.cycles-pp.___perf_sw_event
      0.17 ±  9%      -0.0        0.13 ± 10%  perf-profile.self.cycles-pp.do_user_addr_fault
      0.12 ±  9%      -0.0        0.09 ± 10%  perf-profile.self.cycles-pp.find_lock_entry
      0.08 ± 11%      -0.0        0.05 ±  7%  perf-profile.self.cycles-pp.mem_cgroup_page_lruvec
      0.09 ± 25%      -0.0        0.06 ± 12%  perf-profile.self.cycles-pp._raw_spin_lock_irqsave
      0.08 ±  6%      -0.0        0.06 ± 12%  perf-profile.self.cycles-pp.get_task_policy
      0.11 ±  8%      +0.2        0.31 ± 15%  perf-profile.self.cycles-pp.uncharge_page
      0.15 ± 10%      +0.2        0.38 ± 13%  perf-profile.self.cycles-pp.lock_page_memcg
      0.43 ±  9%      +0.6        1.01 ± 10%  perf-profile.self.cycles-pp.find_get_entry
      1.69 ± 11%      +0.7        2.39 ±  9%  perf-profile.self.cycles-pp.native_irq_return_iret
      1.28 ± 11%      +0.8        2.11 ± 14%  perf-profile.self.cycles-pp.__count_memcg_events
      2.68 ±  9%      +4.3        6.93 ± 14%  perf-profile.self.cycles-pp.get_mem_cgroup_from_mm
      1.84 ± 10%      +6.2        8.01 ± 13%  perf-profile.self.cycles-pp.mem_cgroup_charge


                                                                                
                            will-it-scale.per_process_ops                       
                                                                                
  195000 +------------------------------------------------------------------+   
  190000 |-+         .+.+. .+.+.                         +.+.      .+.     .|   
         |         +.     +     +.+                      :   +.  .+   +. .+ |   
  185000 |-+       :              :                     :      +.       +   |   
  180000 |-+      :                :                    :                   |   
  175000 |-+      :                :                    :                   |   
  170000 |-+     :                  :                  :                    |   
         |.+. .+.+                  +.+.  .+.+.+.+. .+.+                    |   
  165000 |-+ +                          +.         +                        |   
  160000 |-+                                                                |   
  155000 |-+                                                                |   
  150000 |-+                                                                |   
         |   O   O O  O O O     O O   O    O   O         O                  |   
  145000 |-O   O            O O     O   O    O   O O O O   O O O            |   
  140000 +------------------------------------------------------------------+   
                                                                                
                                                                                
[*] bisect-good sample
[O] bisect-bad  sample



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


Thanks,
Rong Chen


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