Re: [PATCH v3 3/5] mm: memcg: make stats flushing threshold per-memcg

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Hello,

kernel test robot noticed a -30.2% regression of will-it-scale.per_thread_ops on:


commit: c7fbfc7b4e089c4a9b292b1973a42a5761c1342f ("[PATCH v3 3/5] mm: memcg: make stats flushing threshold per-memcg")
url: https://github.com/intel-lab-lkp/linux/commits/Yosry-Ahmed/mm-memcg-change-flush_next_time-to-flush_last_time/20231116-103300
base: https://git.kernel.org/cgit/linux/kernel/git/akpm/mm.git mm-everything
patch link: https://lore.kernel.org/all/20231116022411.2250072-4-yosryahmed@xxxxxxxxxx/
patch subject: [PATCH v3 3/5] mm: memcg: make stats flushing threshold per-memcg

testcase: will-it-scale
test machine: 104 threads 2 sockets (Skylake) with 192G memory
parameters:

	nr_task: 50%
	mode: thread
	test: fallocate2
	cpufreq_governor: performance




If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <oliver.sang@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-lkp/202311221542.973f16ad-oliver.sang@xxxxxxxxx


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


The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20231122/202311221542.973f16ad-oliver.sang@xxxxxxxxx

=========================================================================================
compiler/cpufreq_governor/kconfig/mode/nr_task/rootfs/tbox_group/test/testcase:
  gcc-12/performance/x86_64-rhel-8.3/thread/50%/debian-11.1-x86_64-20220510.cgz/lkp-skl-fpga01/fallocate2/will-it-scale

commit: 
  c5caa5bb03 ("mm: memcg: move vmstats structs definition above flushing code")
  c7fbfc7b4e ("mm: memcg: make stats flushing threshold per-memcg")

c5caa5bb0376e3e5 c7fbfc7b4e089c4a9b292b1973a 
---------------- --------------------------- 
         %stddev     %change         %stddev
             \          |                \  
      1.84            -0.5        1.37 ±  9%  mpstat.cpu.all.usr%
      0.08           -25.0%       0.06        turbostat.IPC
      3121            -9.2%       2835 ±  5%  vmstat.system.cs
     78.17 ± 12%     +96.6%     153.67 ± 18%  perf-c2c.DRAM.local
    504.17 ±  6%     +34.4%     677.50 ±  4%  perf-c2c.DRAM.remote
   3980762           -30.2%    2777359        will-it-scale.52.threads
     76552           -30.2%      53410        will-it-scale.per_thread_ops
   3980762           -30.2%    2777359        will-it-scale.workload
 1.192e+09 ±  2%     -30.2%  8.324e+08 ±  3%  numa-numastat.node0.local_node
 1.192e+09 ±  2%     -30.2%  8.324e+08 ±  3%  numa-numastat.node0.numa_hit
 1.215e+09 ±  2%     -30.3%  8.471e+08 ±  3%  numa-numastat.node1.local_node
 1.215e+09 ±  2%     -30.3%  8.474e+08 ±  3%  numa-numastat.node1.numa_hit
 1.192e+09 ±  2%     -30.2%  8.324e+08 ±  3%  numa-vmstat.node0.numa_hit
 1.192e+09 ±  2%     -30.2%  8.324e+08 ±  3%  numa-vmstat.node0.numa_local
 1.215e+09 ±  2%     -30.3%  8.474e+08 ±  3%  numa-vmstat.node1.numa_hit
 1.215e+09 ±  2%     -30.3%  8.471e+08 ±  3%  numa-vmstat.node1.numa_local
     31404            -1.6%      30913        proc-vmstat.nr_slab_reclaimable
 2.408e+09           -30.2%   1.68e+09        proc-vmstat.numa_hit
 2.407e+09           -30.2%   1.68e+09        proc-vmstat.numa_local
 2.404e+09           -30.2%  1.678e+09        proc-vmstat.pgalloc_normal
 2.403e+09           -30.2%  1.678e+09        proc-vmstat.pgfree
      0.05 ±  8%     -27.3%       0.04 ±  4%  perf-sched.wait_and_delay.avg.ms.__cond_resched.shmem_fallocate.vfs_fallocate.__x64_sys_fallocate.do_syscall_64
      0.05 ± 10%     -24.9%       0.04 ±  8%  perf-sched.wait_and_delay.avg.ms.__cond_resched.shmem_inode_acct_blocks.shmem_alloc_and_add_folio.shmem_get_folio_gfp.shmem_fallocate
      0.05 ±  8%     -27.2%       0.04 ±  5%  perf-sched.wait_and_delay.avg.ms.__cond_resched.shmem_undo_range.shmem_setattr.notify_change.do_truncate
      1.14           +14.1%       1.30        perf-sched.wait_and_delay.avg.ms.schedule_timeout.__wait_for_common.wait_for_completion_state.kernel_clone
    198.38 ±  3%     +16.5%     231.12 ±  3%  perf-sched.wait_and_delay.avg.ms.smpboot_thread_fn.kthread.ret_from_fork.ret_from_fork_asm
      1563 ±  5%     -11.4%       1384 ±  5%  perf-sched.wait_and_delay.count.__cond_resched.shmem_fallocate.vfs_fallocate.__x64_sys_fallocate.do_syscall_64
      1677 ±  5%     -18.7%       1364 ±  4%  perf-sched.wait_and_delay.count.__cond_resched.shmem_undo_range.shmem_setattr.notify_change.do_truncate
      3815 ±  2%     -14.5%       3260 ±  2%  perf-sched.wait_and_delay.count.smpboot_thread_fn.kthread.ret_from_fork.ret_from_fork_asm
      0.51 ±  5%     -32.3%       0.35 ± 16%  perf-sched.wait_and_delay.max.ms.__cond_resched.shmem_fallocate.vfs_fallocate.__x64_sys_fallocate.do_syscall_64
      0.47 ± 11%     -33.3%       0.31 ± 20%  perf-sched.wait_and_delay.max.ms.__cond_resched.shmem_inode_acct_blocks.shmem_alloc_and_add_folio.shmem_get_folio_gfp.shmem_fallocate
      2.37           +13.0%       2.68 ±  2%  perf-sched.wait_and_delay.max.ms.schedule_timeout.__wait_for_common.wait_for_completion_state.kernel_clone
      0.05 ±  8%     -27.3%       0.04 ±  4%  perf-sched.wait_time.avg.ms.__cond_resched.shmem_fallocate.vfs_fallocate.__x64_sys_fallocate.do_syscall_64
      0.05 ± 10%     -24.9%       0.04 ±  8%  perf-sched.wait_time.avg.ms.__cond_resched.shmem_inode_acct_blocks.shmem_alloc_and_add_folio.shmem_get_folio_gfp.shmem_fallocate
      0.05 ±  8%     -27.2%       0.04 ±  5%  perf-sched.wait_time.avg.ms.__cond_resched.shmem_undo_range.shmem_setattr.notify_change.do_truncate
      1.14           +14.1%       1.30        perf-sched.wait_time.avg.ms.schedule_timeout.__wait_for_common.wait_for_completion_state.kernel_clone
    198.37 ±  3%     +16.5%     231.11 ±  3%  perf-sched.wait_time.avg.ms.smpboot_thread_fn.kthread.ret_from_fork.ret_from_fork_asm
      0.39 ± 31%     -72.9%       0.11 ± 28%  perf-sched.wait_time.max.ms.__cond_resched.__alloc_pages.alloc_pages_mpol.shmem_alloc_folio.shmem_alloc_and_add_folio
      0.51 ±  5%     -32.3%       0.35 ± 16%  perf-sched.wait_time.max.ms.__cond_resched.shmem_fallocate.vfs_fallocate.__x64_sys_fallocate.do_syscall_64
      0.47 ± 11%     -33.3%       0.31 ± 20%  perf-sched.wait_time.max.ms.__cond_resched.shmem_inode_acct_blocks.shmem_alloc_and_add_folio.shmem_get_folio_gfp.shmem_fallocate
      2.37           +13.1%       2.68 ±  2%  perf-sched.wait_time.max.ms.schedule_timeout.__wait_for_common.wait_for_completion_state.kernel_clone
      0.82 ± 14%    +174.7%       2.24 ± 30%  perf-stat.i.MPKI
 8.476e+09           -27.7%  6.127e+09 ± 10%  perf-stat.i.branch-instructions
  55486131           -28.1%   39884260 ±  6%  perf-stat.i.branch-misses
     14.80 ±  2%      +6.2       20.96 ±  7%  perf-stat.i.cache-miss-rate%
  30690945 ±  3%     +79.9%   55207216 ± 10%  perf-stat.i.cache-misses
 2.066e+08           +24.2%  2.567e+08 ±  7%  perf-stat.i.cache-references
      3070            -9.7%       2772 ±  5%  perf-stat.i.context-switches
      3.58 ±  2%     +39.7%       5.00 ± 11%  perf-stat.i.cpi
      4688 ±  3%     -47.9%       2442 ±  4%  perf-stat.i.cycles-between-cache-misses
   4098916           -29.7%    2879809        perf-stat.i.dTLB-load-misses
 1.052e+10           -27.5%   7.63e+09 ± 10%  perf-stat.i.dTLB-loads
 5.845e+09           -30.7%  4.051e+09 ± 10%  perf-stat.i.dTLB-stores
     77.61            -6.0       71.56        perf-stat.i.iTLB-load-miss-rate%
   4058819           -32.5%    2739054 ±  8%  perf-stat.i.iTLB-load-misses
 4.089e+10           -28.3%  2.932e+10 ± 10%  perf-stat.i.instructions
      0.28           -26.8%       0.21 ±  5%  perf-stat.i.ipc
    240.84           -27.9%     173.57 ± 10%  perf-stat.i.metric.M/sec
   3814721 ±  3%     +72.2%    6569712 ± 10%  perf-stat.i.node-load-misses
    407308 ±  7%     +72.0%     700502 ± 18%  perf-stat.i.node-loads
   1323090 ±  2%     -28.1%     951590 ± 12%  perf-stat.i.node-store-misses
     36568 ±  2%     -20.7%      29014 ± 12%  perf-stat.i.node-stores
      0.75 ±  3%    +151.0%       1.88        perf-stat.overall.MPKI
     14.85 ±  2%      +6.6       21.47 ±  3%  perf-stat.overall.cache-miss-rate%
      3.53           +33.8%       4.72        perf-stat.overall.cpi
      4704 ±  3%     -46.8%       2505        perf-stat.overall.cycles-between-cache-misses
     77.62            -6.2       71.39        perf-stat.overall.iTLB-load-miss-rate%
      0.28           -25.3%       0.21        perf-stat.overall.ipc
   3121462            +7.4%    3353425        perf-stat.overall.path-length
 8.451e+09           -27.6%  6.119e+09 ± 10%  perf-stat.ps.branch-instructions
  55320195           -28.0%   39804925 ±  6%  perf-stat.ps.branch-misses
  30594557 ±  3%     +80.2%   55116821 ±  9%  perf-stat.ps.cache-misses
 2.059e+08           +24.4%  2.561e+08 ±  6%  perf-stat.ps.cache-references
      3059            -9.6%       2765 ±  5%  perf-stat.ps.context-switches
   4085949           -29.7%    2871251        perf-stat.ps.dTLB-load-misses
 1.049e+10           -27.4%   7.62e+09 ± 10%  perf-stat.ps.dTLB-loads
 5.828e+09           -30.6%  4.046e+09 ± 10%  perf-stat.ps.dTLB-stores
   4046367           -32.4%    2734227 ±  7%  perf-stat.ps.iTLB-load-misses
 4.077e+10           -28.2%  2.928e+10 ± 10%  perf-stat.ps.instructions
   3802900 ±  3%     +72.5%    6559980 ± 10%  perf-stat.ps.node-load-misses
    406123 ±  7%     +72.2%     699397 ± 17%  perf-stat.ps.node-loads
   1319155 ±  2%     -28.0%     950261 ± 12%  perf-stat.ps.node-store-misses
     36542 ±  2%     -20.6%      29007 ± 11%  perf-stat.ps.node-stores
 1.243e+13           -25.0%  9.313e+12        perf-stat.total.instructions
      1.26 ±  2%      -0.4        0.91        perf-profile.calltrace.cycles-pp.syscall_return_via_sysret.fallocate64
      1.22            -0.3        0.88 ±  2%  perf-profile.calltrace.cycles-pp.shmem_alloc_folio.shmem_alloc_and_add_folio.shmem_get_folio_gfp.shmem_fallocate.vfs_fallocate
      0.92 ±  2%      -0.3        0.62 ±  3%  perf-profile.calltrace.cycles-pp.shmem_inode_acct_blocks.shmem_alloc_and_add_folio.shmem_get_folio_gfp.shmem_fallocate.vfs_fallocate
      1.04            -0.3        0.76 ±  2%  perf-profile.calltrace.cycles-pp.alloc_pages_mpol.shmem_alloc_folio.shmem_alloc_and_add_folio.shmem_get_folio_gfp.shmem_fallocate
      0.80            -0.2        0.58 ±  3%  perf-profile.calltrace.cycles-pp.__alloc_pages.alloc_pages_mpol.shmem_alloc_folio.shmem_alloc_and_add_folio.shmem_get_folio_gfp
      1.25 ±  2%      -0.2        1.07        perf-profile.calltrace.cycles-pp.folio_batch_move_lru.lru_add_drain_cpu.__folio_batch_release.shmem_undo_range.shmem_setattr
      1.25 ±  2%      -0.2        1.07        perf-profile.calltrace.cycles-pp.lru_add_drain_cpu.__folio_batch_release.shmem_undo_range.shmem_setattr.notify_change
      1.23 ±  2%      -0.2        1.06        perf-profile.calltrace.cycles-pp.folio_lruvec_lock_irqsave.folio_batch_move_lru.lru_add_drain_cpu.__folio_batch_release.shmem_undo_range
      1.23 ±  2%      -0.2        1.06        perf-profile.calltrace.cycles-pp._raw_spin_lock_irqsave.folio_lruvec_lock_irqsave.folio_batch_move_lru.lru_add_drain_cpu.__folio_batch_release
      1.23 ±  2%      -0.2        1.05        perf-profile.calltrace.cycles-pp.native_queued_spin_lock_slowpath._raw_spin_lock_irqsave.folio_lruvec_lock_irqsave.folio_batch_move_lru.lru_add_drain_cpu
      1.16 ±  2%      -0.1        1.02 ±  2%  perf-profile.calltrace.cycles-pp.syscall_exit_to_user_mode.do_syscall_64.entry_SYSCALL_64_after_hwframe.fallocate64
      0.68            +0.1        0.75 ±  2%  perf-profile.calltrace.cycles-pp.__mem_cgroup_uncharge_list.release_pages.__folio_batch_release.shmem_undo_range.shmem_setattr
      1.07            +0.1        1.18 ±  2%  perf-profile.calltrace.cycles-pp.lru_add_fn.folio_batch_move_lru.folio_add_lru.shmem_alloc_and_add_folio.shmem_get_folio_gfp
      2.95            +0.3        3.21 ±  2%  perf-profile.calltrace.cycles-pp.truncate_inode_folio.shmem_undo_range.shmem_setattr.notify_change.do_truncate
      2.60            +0.4        2.95        perf-profile.calltrace.cycles-pp.filemap_remove_folio.truncate_inode_folio.shmem_undo_range.shmem_setattr.notify_change
      2.27            +0.4        2.71 ±  2%  perf-profile.calltrace.cycles-pp.__filemap_remove_folio.filemap_remove_folio.truncate_inode_folio.shmem_undo_range.shmem_setattr
      1.38 ±  3%      +0.5        1.85 ±  5%  perf-profile.calltrace.cycles-pp.get_mem_cgroup_from_mm.__mem_cgroup_charge.shmem_alloc_and_add_folio.shmem_get_folio_gfp.shmem_fallocate
      2.29 ±  2%      +0.6        2.90 ±  2%  perf-profile.calltrace.cycles-pp.shmem_add_to_page_cache.shmem_alloc_and_add_folio.shmem_get_folio_gfp.shmem_fallocate.vfs_fallocate
      0.00            +0.6        0.63 ±  2%  perf-profile.calltrace.cycles-pp.__mod_memcg_lruvec_state.release_pages.__folio_batch_release.shmem_undo_range.shmem_setattr
      0.00            +0.7        0.74 ±  3%  perf-profile.calltrace.cycles-pp.__mod_memcg_lruvec_state.lru_add_fn.folio_batch_move_lru.folio_add_lru.shmem_alloc_and_add_folio
      1.30            +0.8        2.07 ±  3%  perf-profile.calltrace.cycles-pp.filemap_unaccount_folio.__filemap_remove_folio.filemap_remove_folio.truncate_inode_folio.shmem_undo_range
      0.73 ±  2%      +0.8        1.53 ±  2%  perf-profile.calltrace.cycles-pp.__mod_memcg_lruvec_state.__mod_lruvec_page_state.filemap_unaccount_folio.__filemap_remove_folio.filemap_remove_folio
      1.23            +0.8        2.04 ±  3%  perf-profile.calltrace.cycles-pp.__mod_lruvec_page_state.filemap_unaccount_folio.__filemap_remove_folio.filemap_remove_folio.truncate_inode_folio
      0.00            +0.8        0.82 ±  2%  perf-profile.calltrace.cycles-pp.__count_memcg_events.mem_cgroup_commit_charge.__mem_cgroup_charge.shmem_alloc_and_add_folio.shmem_get_folio_gfp
      1.39 ±  2%      +0.9        2.32 ±  2%  perf-profile.calltrace.cycles-pp.__mod_lruvec_page_state.shmem_add_to_page_cache.shmem_alloc_and_add_folio.shmem_get_folio_gfp.shmem_fallocate
      0.59 ±  2%      +0.9        1.53 ±  2%  perf-profile.calltrace.cycles-pp.__mod_memcg_lruvec_state.__mod_lruvec_page_state.shmem_add_to_page_cache.shmem_alloc_and_add_folio.shmem_get_folio_gfp
     38.12            +1.0       39.16        perf-profile.calltrace.cycles-pp.vfs_fallocate.__x64_sys_fallocate.do_syscall_64.entry_SYSCALL_64_after_hwframe.fallocate64
      0.62 ±  4%      +1.1        1.71 ±  3%  perf-profile.calltrace.cycles-pp.mem_cgroup_commit_charge.__mem_cgroup_charge.shmem_alloc_and_add_folio.shmem_get_folio_gfp.shmem_fallocate
     37.61            +1.2       38.80        perf-profile.calltrace.cycles-pp.shmem_fallocate.vfs_fallocate.__x64_sys_fallocate.do_syscall_64.entry_SYSCALL_64_after_hwframe
     36.54            +1.5       38.02        perf-profile.calltrace.cycles-pp.shmem_get_folio_gfp.shmem_fallocate.vfs_fallocate.__x64_sys_fallocate.do_syscall_64
     35.97            +1.6       37.60        perf-profile.calltrace.cycles-pp.shmem_alloc_and_add_folio.shmem_get_folio_gfp.shmem_fallocate.vfs_fallocate.__x64_sys_fallocate
      2.48 ±  3%      +2.3        4.80 ±  4%  perf-profile.calltrace.cycles-pp.__mem_cgroup_charge.shmem_alloc_and_add_folio.shmem_get_folio_gfp.shmem_fallocate.vfs_fallocate
      1.28 ±  2%      -0.4        0.92        perf-profile.children.cycles-pp.syscall_return_via_sysret
      1.23            -0.3        0.88 ±  2%  perf-profile.children.cycles-pp.shmem_alloc_folio
      0.95 ±  2%      -0.3        0.64 ±  3%  perf-profile.children.cycles-pp.shmem_inode_acct_blocks
      1.07            -0.3        0.77 ±  3%  perf-profile.children.cycles-pp.alloc_pages_mpol
      0.86 ±  2%      -0.3        0.58 ±  2%  perf-profile.children.cycles-pp.xas_store
      0.84            -0.2        0.61 ±  3%  perf-profile.children.cycles-pp.__alloc_pages
      1.26 ±  2%      -0.2        1.08        perf-profile.children.cycles-pp.lru_add_drain_cpu
      0.61 ±  3%      -0.2        0.43        perf-profile.children.cycles-pp.__entry_text_start
      0.56 ±  2%      -0.2        0.40 ±  3%  perf-profile.children.cycles-pp.free_unref_page_list
      0.26 ±  7%      -0.2        0.11 ±  5%  perf-profile.children.cycles-pp.__list_add_valid_or_report
      1.19 ±  2%      -0.1        1.04 ±  2%  perf-profile.children.cycles-pp.syscall_exit_to_user_mode
      0.45 ±  4%      -0.1        0.31        perf-profile.children.cycles-pp.__mod_lruvec_state
      0.48 ±  2%      -0.1        0.35 ±  2%  perf-profile.children.cycles-pp.get_page_from_freelist
      0.38 ±  5%      -0.1        0.27 ±  2%  perf-profile.children.cycles-pp.xas_load
      0.38 ±  2%      -0.1        0.27 ±  2%  perf-profile.children.cycles-pp._raw_spin_lock
      0.33 ±  4%      -0.1        0.23 ±  2%  perf-profile.children.cycles-pp.__mod_node_page_state
      0.42 ±  2%      -0.1        0.32 ±  5%  perf-profile.children.cycles-pp.find_lock_entries
      0.32 ±  2%      -0.1        0.23 ±  2%  perf-profile.children.cycles-pp.__dquot_alloc_space
      0.33 ±  2%      -0.1        0.24 ±  3%  perf-profile.children.cycles-pp.rmqueue
      0.24 ±  3%      -0.1        0.17 ±  4%  perf-profile.children.cycles-pp.xas_descend
      0.23 ±  3%      -0.1        0.16 ±  4%  perf-profile.children.cycles-pp.xas_init_marks
      0.25 ±  3%      -0.1        0.17 ±  2%  perf-profile.children.cycles-pp.xas_clear_mark
      0.23 ±  2%      -0.1        0.16 ±  5%  perf-profile.children.cycles-pp.__cond_resched
      0.28 ±  5%      -0.1        0.22 ±  2%  perf-profile.children.cycles-pp.filemap_get_entry
      0.24 ±  3%      -0.1        0.18 ±  4%  perf-profile.children.cycles-pp.truncate_cleanup_folio
      0.16 ±  4%      -0.1        0.10 ±  4%  perf-profile.children.cycles-pp.xas_find_conflict
      0.09 ±  7%      -0.1        0.03 ± 70%  perf-profile.children.cycles-pp.mem_cgroup_update_lru_size
      0.18            -0.1        0.12 ±  6%  perf-profile.children.cycles-pp.shmem_recalc_inode
      0.18 ±  2%      -0.1        0.12 ±  3%  perf-profile.children.cycles-pp.folio_unlock
      0.17 ±  4%      -0.1        0.12 ±  3%  perf-profile.children.cycles-pp.free_unref_page_prepare
      0.16 ±  6%      -0.1        0.11 ±  4%  perf-profile.children.cycles-pp.security_file_permission
      0.13 ±  7%      -0.0        0.08 ± 13%  perf-profile.children.cycles-pp.security_vm_enough_memory_mm
      0.20 ±  4%      -0.0        0.15 ±  2%  perf-profile.children.cycles-pp.free_unref_page_commit
      0.16 ±  5%      -0.0        0.11 ±  3%  perf-profile.children.cycles-pp.noop_dirty_folio
      0.15 ±  5%      -0.0        0.11 ±  4%  perf-profile.children.cycles-pp.file_modified
      0.12 ± 10%      -0.0        0.08        perf-profile.children.cycles-pp.__percpu_counter_limited_add
      0.19 ±  5%      -0.0        0.14 ±  5%  perf-profile.children.cycles-pp._raw_spin_lock_irq
      0.11 ± 12%      -0.0        0.06 ± 17%  perf-profile.children.cycles-pp.cap_vm_enough_memory
      0.14 ±  5%      -0.0        0.10 ±  6%  perf-profile.children.cycles-pp.__fget_light
      0.14 ±  7%      -0.0        0.10 ±  4%  perf-profile.children.cycles-pp.apparmor_file_permission
      0.14 ±  2%      -0.0        0.10 ±  4%  perf-profile.children.cycles-pp.__folio_cancel_dirty
      0.12 ±  3%      -0.0        0.08 ±  4%  perf-profile.children.cycles-pp.entry_SYSCALL_64_safe_stack
      0.11 ± 10%      -0.0        0.08 ± 16%  perf-profile.children.cycles-pp.__vm_enough_memory
      0.11 ±  8%      -0.0        0.08 ±  4%  perf-profile.children.cycles-pp.xas_start
      0.11 ±  3%      -0.0        0.08 ±  4%  perf-profile.children.cycles-pp.__fsnotify_parent
      0.18 ±  2%      -0.0        0.14 ±  6%  perf-profile.children.cycles-pp.__list_del_entry_valid_or_report
      0.08 ±  6%      -0.0        0.04 ± 45%  perf-profile.children.cycles-pp.__get_file_rcu
      0.12 ±  7%      -0.0        0.09 ±  5%  perf-profile.children.cycles-pp.inode_add_bytes
      0.11 ±  4%      -0.0        0.08 ±  8%  perf-profile.children.cycles-pp._raw_spin_trylock
      0.08 ±  6%      -0.0        0.05 ± 45%  perf-profile.children.cycles-pp.percpu_counter_add_batch
      0.10            -0.0        0.07 ±  9%  perf-profile.children.cycles-pp.inode_needs_update_time
      0.09 ±  7%      -0.0        0.06 ±  6%  perf-profile.children.cycles-pp.get_pfnblock_flags_mask
      0.07 ±  6%      -0.0        0.05 ± 45%  perf-profile.children.cycles-pp.shmem_is_huge
      0.09 ±  7%      -0.0        0.07 ±  7%  perf-profile.children.cycles-pp.entry_SYSRETQ_unsafe_stack
      0.08 ±  4%      -0.0        0.06 ±  8%  perf-profile.children.cycles-pp.policy_nodemask
      0.19 ±  3%      -0.0        0.17 ±  4%  perf-profile.children.cycles-pp.try_charge_memcg
      0.08 ±  8%      -0.0        0.06 ±  8%  perf-profile.children.cycles-pp.down_write
      0.09 ±  7%      -0.0        0.07 ±  5%  perf-profile.children.cycles-pp.xas_create
      0.09 ±  7%      -0.0        0.07 ±  7%  perf-profile.children.cycles-pp.filemap_free_folio
      0.08 ±  4%      -0.0        0.06 ±  6%  perf-profile.children.cycles-pp.xas_find
      0.07 ±  5%      +0.0        0.09 ±  5%  perf-profile.children.cycles-pp.propagate_protected_usage
      0.25            +0.0        0.28 ±  2%  perf-profile.children.cycles-pp.uncharge_folio
      0.43 ±  2%      +0.0        0.47 ±  2%  perf-profile.children.cycles-pp.uncharge_batch
      0.69            +0.1        0.75 ±  2%  perf-profile.children.cycles-pp.__mem_cgroup_uncharge_list
      1.10            +0.1        1.20 ±  2%  perf-profile.children.cycles-pp.lru_add_fn
      2.96            +0.3        3.21        perf-profile.children.cycles-pp.truncate_inode_folio
      2.60            +0.4        2.96        perf-profile.children.cycles-pp.filemap_remove_folio
      2.29            +0.4        2.73 ±  2%  perf-profile.children.cycles-pp.__filemap_remove_folio
      1.39 ±  3%      +0.5        1.85 ±  5%  perf-profile.children.cycles-pp.get_mem_cgroup_from_mm
      2.34 ±  2%      +0.6        2.93 ±  2%  perf-profile.children.cycles-pp.shmem_add_to_page_cache
      0.18 ±  5%      +0.7        0.92 ±  2%  perf-profile.children.cycles-pp.__count_memcg_events
      1.32            +0.8        2.07 ±  3%  perf-profile.children.cycles-pp.filemap_unaccount_folio
     38.14            +1.0       39.17        perf-profile.children.cycles-pp.vfs_fallocate
      0.64 ±  4%      +1.1        1.72 ±  3%  perf-profile.children.cycles-pp.mem_cgroup_commit_charge
     37.63            +1.2       38.81        perf-profile.children.cycles-pp.shmem_fallocate
     36.57            +1.5       38.05        perf-profile.children.cycles-pp.shmem_get_folio_gfp
     36.04            +1.6       37.65        perf-profile.children.cycles-pp.shmem_alloc_and_add_folio
      2.66            +1.7        4.38 ±  3%  perf-profile.children.cycles-pp.__mod_lruvec_page_state
      2.49 ±  2%      +2.3        4.80 ±  4%  perf-profile.children.cycles-pp.__mem_cgroup_charge
      1.99 ±  2%      +2.5        4.46        perf-profile.children.cycles-pp.__mod_memcg_lruvec_state
      1.28 ±  2%      -0.4        0.92        perf-profile.self.cycles-pp.syscall_return_via_sysret
      0.69 ±  2%      -0.2        0.50 ±  2%  perf-profile.self.cycles-pp.entry_SYSCALL_64_after_hwframe
      0.54 ±  2%      -0.2        0.36 ±  2%  perf-profile.self.cycles-pp.release_pages
      0.47 ±  2%      -0.2        0.31 ±  2%  perf-profile.self.cycles-pp.xas_store
      0.53 ±  3%      -0.2        0.37 ±  2%  perf-profile.self.cycles-pp.__entry_text_start
      0.36 ±  3%      -0.2        0.21 ±  2%  perf-profile.self.cycles-pp.shmem_add_to_page_cache
      0.26 ±  8%      -0.2        0.11 ±  5%  perf-profile.self.cycles-pp.__list_add_valid_or_report
      1.14 ±  2%      -0.1        1.01 ±  2%  perf-profile.self.cycles-pp.syscall_exit_to_user_mode
      0.40 ±  4%      -0.1        0.28 ±  4%  perf-profile.self.cycles-pp.lru_add_fn
      0.37 ±  2%      -0.1        0.26        perf-profile.self.cycles-pp._raw_spin_lock
      0.32 ±  3%      -0.1        0.22 ±  2%  perf-profile.self.cycles-pp.__mod_node_page_state
      0.35 ±  3%      -0.1        0.25 ±  2%  perf-profile.self.cycles-pp.shmem_fallocate
      0.50 ±  2%      -0.1        0.40 ±  3%  perf-profile.self.cycles-pp.folio_batch_move_lru
      0.34 ±  3%      -0.1        0.26 ±  5%  perf-profile.self.cycles-pp.find_lock_entries
      0.28 ±  2%      -0.1        0.20 ±  5%  perf-profile.self.cycles-pp.__alloc_pages
      0.22 ±  2%      -0.1        0.16 ±  3%  perf-profile.self.cycles-pp.xas_clear_mark
      0.21 ±  3%      -0.1        0.15 ±  4%  perf-profile.self.cycles-pp.shmem_alloc_and_add_folio
      0.18 ±  3%      -0.1        0.12 ±  5%  perf-profile.self.cycles-pp.free_unref_page_list
      0.22 ±  3%      -0.1        0.16 ±  3%  perf-profile.self.cycles-pp.xas_descend
      0.20 ±  6%      -0.1        0.14 ±  2%  perf-profile.self.cycles-pp.__dquot_alloc_space
      0.18 ±  4%      -0.1        0.12 ±  6%  perf-profile.self.cycles-pp.shmem_inode_acct_blocks
      0.21 ±  5%      -0.1        0.15 ±  5%  perf-profile.self.cycles-pp.vfs_fallocate
      0.18 ±  2%      -0.1        0.12 ±  3%  perf-profile.self.cycles-pp.__filemap_remove_folio
      0.17 ±  4%      -0.1        0.12 ±  3%  perf-profile.self.cycles-pp.folio_unlock
      0.20 ±  3%      -0.0        0.14 ±  5%  perf-profile.self.cycles-pp.shmem_get_folio_gfp
      0.16 ±  5%      -0.0        0.12 ±  6%  perf-profile.self.cycles-pp.__cond_resched
      0.17 ±  5%      -0.0        0.12 ±  3%  perf-profile.self.cycles-pp._raw_spin_lock_irq
      0.14 ±  4%      -0.0        0.10 ±  5%  perf-profile.self.cycles-pp.xas_load
      0.15 ±  2%      -0.0        0.10 ±  4%  perf-profile.self.cycles-pp.get_page_from_freelist
      0.16 ±  4%      -0.0        0.12 ±  4%  perf-profile.self.cycles-pp.alloc_pages_mpol
      0.12 ±  6%      -0.0        0.08 ±  6%  perf-profile.self.cycles-pp.rmqueue
      0.13 ±  6%      -0.0        0.09 ±  4%  perf-profile.self.cycles-pp._raw_spin_lock_irqsave
      0.13 ±  8%      -0.0        0.09 ±  4%  perf-profile.self.cycles-pp.apparmor_file_permission
      0.15 ±  3%      -0.0        0.11 ±  3%  perf-profile.self.cycles-pp.noop_dirty_folio
      0.10 ± 10%      -0.0        0.06 ± 17%  perf-profile.self.cycles-pp.cap_vm_enough_memory
      0.07 ±  8%      -0.0        0.03 ± 70%  perf-profile.self.cycles-pp.percpu_counter_add_batch
      0.12 ± 10%      -0.0        0.08 ±  4%  perf-profile.self.cycles-pp.__percpu_counter_limited_add
      0.12 ±  4%      -0.0        0.08 ±  8%  perf-profile.self.cycles-pp.folio_add_lru
      0.10 ±  3%      -0.0        0.06 ±  7%  perf-profile.self.cycles-pp.xas_init_marks
      0.10 ±  9%      -0.0        0.07        perf-profile.self.cycles-pp.xas_start
      0.13 ±  3%      -0.0        0.10 ±  5%  perf-profile.self.cycles-pp.filemap_remove_folio
      0.11 ±  6%      -0.0        0.08 ±  6%  perf-profile.self.cycles-pp.__fsnotify_parent
      0.16 ±  4%      -0.0        0.12 ±  4%  perf-profile.self.cycles-pp.free_unref_page_commit
      0.12 ±  4%      -0.0        0.08 ±  4%  perf-profile.self.cycles-pp.__mod_lruvec_state
      0.11 ±  3%      -0.0        0.08 ±  7%  perf-profile.self.cycles-pp.fallocate64
      0.08 ±  6%      -0.0        0.04 ± 45%  perf-profile.self.cycles-pp.__get_file_rcu
      0.11 ±  4%      -0.0        0.08 ±  8%  perf-profile.self.cycles-pp.__folio_cancel_dirty
      0.11 ±  3%      -0.0        0.08 ±  6%  perf-profile.self.cycles-pp._raw_spin_trylock
      0.11 ±  6%      -0.0        0.08 ±  6%  perf-profile.self.cycles-pp.truncate_cleanup_folio
      0.06 ±  7%      -0.0        0.03 ± 70%  perf-profile.self.cycles-pp.__fget_light
      0.17 ±  3%      -0.0        0.14 ±  5%  perf-profile.self.cycles-pp.__list_del_entry_valid_or_report
      0.09 ±  5%      -0.0        0.06 ±  7%  perf-profile.self.cycles-pp.filemap_get_entry
      0.22 ±  6%      -0.0        0.19 ±  3%  perf-profile.self.cycles-pp.page_counter_uncharge
      0.09 ±  7%      -0.0        0.06 ±  6%  perf-profile.self.cycles-pp.get_pfnblock_flags_mask
      0.08 ±  5%      -0.0        0.06 ±  8%  perf-profile.self.cycles-pp.free_unref_page_prepare
      0.07 ± 11%      -0.0        0.04 ± 44%  perf-profile.self.cycles-pp.shmem_is_huge
      0.08 ±  6%      -0.0        0.05 ±  7%  perf-profile.self.cycles-pp.__x64_sys_fallocate
      0.08 ±  7%      -0.0        0.06 ±  6%  perf-profile.self.cycles-pp.entry_SYSRETQ_unsafe_stack
      0.09 ±  7%      -0.0        0.07 ±  7%  perf-profile.self.cycles-pp.filemap_free_folio
      0.08 ±  8%      -0.0        0.06        perf-profile.self.cycles-pp.shmem_alloc_folio
      0.12 ±  6%      -0.0        0.10 ±  6%  perf-profile.self.cycles-pp.try_charge_memcg
      0.07 ±  5%      +0.0        0.09 ±  5%  perf-profile.self.cycles-pp.propagate_protected_usage
      0.24            +0.0        0.27 ±  3%  perf-profile.self.cycles-pp.uncharge_folio
      0.46 ±  4%      +0.4        0.86 ±  5%  perf-profile.self.cycles-pp.mem_cgroup_commit_charge
      1.38 ±  3%      +0.5        1.84 ±  5%  perf-profile.self.cycles-pp.get_mem_cgroup_from_mm
      0.16 ±  3%      +0.7        0.90 ±  2%  perf-profile.self.cycles-pp.__count_memcg_events
      0.28 ±  3%      +0.8        1.06 ±  5%  perf-profile.self.cycles-pp.__mem_cgroup_charge
      1.86 ±  2%      +2.5        4.36        perf-profile.self.cycles-pp.__mod_memcg_lruvec_state




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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