Re: [PATCH RFC 6/7] libfs: Convert simple directory offsets to use a Maple Tree
From: Oliver Sang
Date: Mon Feb 19 2024 - 01:00:50 EST
hi, Chuck Lever,
On Sun, Feb 18, 2024 at 10:57:07AM -0500, Chuck Lever wrote:
> On Sun, Feb 18, 2024 at 10:02:37AM +0800, Oliver Sang wrote:
> > hi, Chuck Lever,
> >
> > On Thu, Feb 15, 2024 at 08:45:33AM -0500, Chuck Lever wrote:
> > > On Thu, Feb 15, 2024 at 02:06:01PM +0100, Jan Kara wrote:
> > > > On Tue 13-02-24 16:38:01, Chuck Lever wrote:
> > > > > From: Chuck Lever <chuck.lever@xxxxxxxxxx>
> > > > >
> > > > > Test robot reports:
> > > > > > kernel test robot noticed a -19.0% regression of aim9.disk_src.ops_per_sec on:
> > > > > >
> > > > > > commit: a2e459555c5f9da3e619b7e47a63f98574dc75f1 ("shmem: stable directory offsets")
> > > > > > https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
> > > > >
> > > > > Feng Tang further clarifies that:
> > > > > > ... the new simple_offset_add()
> > > > > > called by shmem_mknod() brings extra cost related with slab,
> > > > > > specifically the 'radix_tree_node', which cause the regression.
> > > > >
> > > > > Willy's analysis is that, over time, the test workload causes
> > > > > xa_alloc_cyclic() to fragment the underlying SLAB cache.
> > > > >
> > > > > This patch replaces the offset_ctx's xarray with a Maple Tree in the
> > > > > hope that Maple Tree's dense node mode will handle this scenario
> > > > > more scalably.
> > > > >
> > > > > In addition, we can widen the directory offset to an unsigned long
> > > > > everywhere.
> > > > >
> > > > > Suggested-by: Matthew Wilcox <willy@xxxxxxxxxxxxx>
> > > > > Reported-by: kernel test robot <oliver.sang@xxxxxxxxx>
> > > > > Closes: https://lore.kernel.org/oe-lkp/202309081306.3ecb3734-oliver.sang@xxxxxxxxx
> > > > > Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx>
> > > >
> > > > OK, but this will need the performance numbers.
> > >
> > > Yes, I totally concur. The point of this posting was to get some
> > > early review and start the ball rolling.
> > >
> > > Actually we expect roughly the same performance numbers now. "Dense
> > > node" support in Maple Tree is supposed to be the real win, but
> > > I'm not sure it's ready yet.
> > >
> > >
> > > > Otherwise we have no idea
> > > > whether this is worth it or not. Maybe you can ask Oliver Sang? Usually
> > > > 0-day guys are quite helpful.
> > >
> > > Oliver and Feng were copied on this series.
> >
> > we are in holidays last week, now we are back.
> >
> > I noticed there is v2 for this patch set
> > https://lore.kernel.org/all/170820145616.6328.12620992971699079156.stgit@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx/
> >
> > and you also put it in a branch:
> > https://git.kernel.org/pub/scm/linux/kernel/git/cel/linux.git
> > "simple-offset-maple" branch.
> >
> > we will test aim9 performance based on this branch. Thanks
>
> Very much appreciated!
always our pleasure!
we've already sent out a report [1] to you for the commit a616bc6667 in new
branch.
we saw 11.8% improvement of aim9.disk_src.ops_per_sec on it comparing to its
parent.
so the regression we saw on a2e459555c is 'half' recovered.
since I noticed the performance for a2e459555c, v6.8-rc4 and f3f24869a1 (parent
of a616bc6667) are very similar, so ignored results from v6.8-rc4 and f3f24869a1
in below tables for brief. if you want a full table, please let me know. Thanks!
summary for aim9.disk_src.ops_per_sec:
=========================================================================================
compiler/cpufreq_governor/kconfig/rootfs/tbox_group/test/testcase/testtime:
gcc-12/performance/x86_64-rhel-8.3/debian-11.1-x86_64-20220510.cgz/lkp-ivb-2ep1/disk_src/aim9/300s
commit:
23a31d8764 ("shmem: Refactor shmem_symlink()")
a2e459555c ("shmem: stable directory offsets")
a616bc6667 ("libfs: Convert simple directory offsets to use a Maple Tree")
23a31d87645c6527 a2e459555c5f9da3e619b7e47a6 a616bc666748063733c62e15ea4
---------------- --------------------------- ---------------------------
%stddev %change %stddev %change %stddev
\ | \ | \
202424 -19.0% 163868 -9.3% 183678 aim9.disk_src.ops_per_sec
full data:
=========================================================================================
compiler/cpufreq_governor/kconfig/rootfs/tbox_group/test/testcase/testtime:
gcc-12/performance/x86_64-rhel-8.3/debian-11.1-x86_64-20220510.cgz/lkp-ivb-2ep1/disk_src/aim9/300s
commit:
23a31d8764 ("shmem: Refactor shmem_symlink()")
a2e459555c ("shmem: stable directory offsets")
a616bc6667 ("libfs: Convert simple directory offsets to use a Maple Tree")
23a31d87645c6527 a2e459555c5f9da3e619b7e47a6 a616bc666748063733c62e15ea4
---------------- --------------------------- ---------------------------
%stddev %change %stddev %change %stddev
\ | \ | \
1404 +0.6% 1412 +3.3% 1450 boot-time.idle
0.26 ± 9% +0.1 0.36 ± 2% -0.1 0.20 ± 4% mpstat.cpu.all.soft%
0.61 -0.1 0.52 -0.0 0.58 mpstat.cpu.all.usr%
1.00 +0.0% 1.00 +19.5% 1.19 ± 2% vmstat.procs.r
1525 ± 6% -5.6% 1440 +9.4% 1668 ± 4% vmstat.system.cs
52670 +5.0% 55323 ± 3% +12.7% 59381 ± 3% turbostat.C1
0.02 +0.0 0.02 +0.0 0.03 ± 10% turbostat.C1%
12949 ± 9% -1.2% 12795 ± 6% -19.6% 10412 ± 6% turbostat.POLL
115468 ± 24% +11.9% 129258 ± 7% +16.5% 134545 ± 5% numa-meminfo.node0.AnonPages.max
2015 ± 12% -7.5% 1864 ± 5% +30.3% 2624 ± 10% numa-meminfo.node0.PageTables
4795 ± 30% +1.1% 4846 ± 37% +117.0% 10405 ± 21% numa-meminfo.node0.Shmem
6442 ± 5% -0.6% 6401 ± 4% -19.6% 5180 ± 7% numa-meminfo.node1.KernelStack
13731 ± 92% -88.7% 1546 ± 6% +161.6% 35915 ± 23% time.involuntary_context_switches
94.83 -4.2% 90.83 +1.2% 96.00 time.percent_of_cpu_this_job_got
211.64 +0.5% 212.70 +4.0% 220.06 time.system_time
73.62 -17.6% 60.69 -6.4% 68.94 time.user_time
202424 -19.0% 163868 -9.3% 183678 aim9.disk_src.ops_per_sec
13731 ± 92% -88.7% 1546 ± 6% +161.6% 35915 ± 23% aim9.time.involuntary_context_switches
94.83 -4.2% 90.83 +1.2% 96.00 aim9.time.percent_of_cpu_this_job_got
211.64 +0.5% 212.70 +4.0% 220.06 aim9.time.system_time
73.62 -17.6% 60.69 -6.4% 68.94 aim9.time.user_time
174558 ± 4% -1.0% 172852 ± 7% -19.7% 140084 ± 7% meminfo.DirectMap4k
94166 +6.6% 100388 -14.4% 80579 meminfo.KReclaimable
12941 +0.4% 12989 -14.4% 11078 meminfo.KernelStack
3769 +0.2% 3775 +31.5% 4955 meminfo.PageTables
79298 +0.0% 79298 -70.6% 23298 meminfo.Percpu
94166 +6.6% 100388 -14.4% 80579 meminfo.SReclaimable
204209 +2.9% 210111 -9.6% 184661 meminfo.Slab
503.33 ± 12% -7.5% 465.67 ± 5% +30.4% 656.39 ± 10% numa-vmstat.node0.nr_page_table_pages
1198 ± 30% +1.1% 1211 ± 37% +117.0% 2601 ± 21% numa-vmstat.node0.nr_shmem
220.33 +0.2% 220.83 ± 2% -97.3% 6.00 ±100% numa-vmstat.node1.nr_active_file
167.00 +0.2% 167.33 ± 2% -87.7% 20.48 ±100% numa-vmstat.node1.nr_inactive_file
6443 ± 5% -0.6% 6405 ± 4% -19.5% 5184 ± 7% numa-vmstat.node1.nr_kernel_stack
220.33 +0.2% 220.83 ± 2% -97.3% 6.00 ±100% numa-vmstat.node1.nr_zone_active_file
167.00 +0.2% 167.33 ± 2% -87.7% 20.48 ±100% numa-vmstat.node1.nr_zone_inactive_file
0.04 ± 25% +4.1% 0.05 ± 33% -40.1% 0.03 ± 34% perf-sched.sch_delay.avg.ms.syslog_print.do_syslog.kmsg_read.vfs_read
0.01 ± 4% +1.6% 0.01 ± 8% +136.9% 0.02 ± 29% perf-sched.sch_delay.avg.ms.worker_thread.kthread.ret_from_fork.ret_from_fork_asm
0.16 ± 10% -18.9% 0.13 ± 12% -16.4% 0.13 ± 15% perf-sched.sch_delay.max.ms.pipe_read.vfs_read.ksys_read.do_syscall_64
0.14 ± 15% -6.0% 0.14 ± 20% -30.4% 0.10 ± 26% perf-sched.sch_delay.max.ms.schedule_timeout.__wait_for_common.wait_for_completion_state.kernel_clone
0.04 ± 7% +1802.4% 0.78 ±115% +7258.6% 3.00 ± 56% perf-sched.sch_delay.max.ms.smpboot_thread_fn.kthread.ret_from_fork.ret_from_fork_asm
0.05 ± 40% -14.5% 0.04 ± 31% +6155.4% 3.09 perf-sched.sch_delay.max.ms.worker_thread.kthread.ret_from_fork.ret_from_fork_asm
0.01 ± 8% +25.5% 0.01 ± 21% +117.0% 0.02 ± 30% perf-sched.total_sch_delay.average.ms
0.16 ± 11% +1204.9% 2.12 ± 90% +2225.8% 3.77 ± 10% perf-sched.total_sch_delay.max.ms
58.50 ± 28% -4.8% 55.67 ± 14% -23.9% 44.50 ± 4% perf-sched.wait_and_delay.count.schedule_hrtimeout_range_clock.usleep_range_state.ipmi_thread.kthread
277.83 ± 3% +10.3% 306.50 ± 5% +17.9% 327.62 ± 4% perf-sched.wait_and_delay.count.worker_thread.kthread.ret_from_fork.ret_from_fork_asm
0.10 ± 75% -47.1% 0.05 ± 86% -100.0% 0.00 perf-sched.wait_time.avg.ms.__cond_resched.dput.path_put.vfs_statx.vfs_fstatat
0.10 ± 72% -10.8% 0.09 ± 67% -100.0% 0.00 perf-sched.wait_time.avg.ms.exit_to_user_mode_loop.exit_to_user_mode_prepare.irqentry_exit_to_user_mode.asm_sysvec_apic_timer_interrupt
2.00 ± 27% -4.8% 1.90 ± 14% -23.7% 1.53 ± 4% perf-sched.wait_time.avg.ms.schedule_hrtimeout_range_clock.do_select.core_sys_select.kern_select
0.16 ± 81% +20.1% 0.19 ±104% -100.0% 0.00 perf-sched.wait_time.max.ms.__cond_resched.dput.path_put.vfs_statx.vfs_fstatat
0.22 ± 77% +14.2% 0.25 ± 54% -100.0% 0.00 perf-sched.wait_time.max.ms.exit_to_user_mode_loop.exit_to_user_mode_prepare.irqentry_exit_to_user_mode.asm_sysvec_apic_timer_interrupt
7.32 ± 43% -10.3% 6.57 ± 20% -33.2% 4.89 ± 6% perf-sched.wait_time.max.ms.schedule_hrtimeout_range_clock.do_select.core_sys_select.kern_select
220.33 +0.2% 220.83 ± 2% -94.6% 12.00 proc-vmstat.nr_active_file
676766 -0.0% 676706 +4.1% 704377 proc-vmstat.nr_file_pages
167.00 +0.2% 167.33 ± 2% -75.5% 40.98 proc-vmstat.nr_inactive_file
12941 +0.4% 12988 -14.4% 11083 proc-vmstat.nr_kernel_stack
942.50 +0.1% 943.50 +31.4% 1238 proc-vmstat.nr_page_table_pages
7915 ± 3% -0.8% 7855 +8.6% 8599 proc-vmstat.nr_shmem
23541 +6.5% 25074 -14.4% 20144 proc-vmstat.nr_slab_reclaimable
27499 -0.3% 27422 -5.4% 26016 proc-vmstat.nr_slab_unreclaimable
668461 +0.0% 668461 +4.2% 696493 proc-vmstat.nr_unevictable
220.33 +0.2% 220.83 ± 2% -94.6% 12.00 proc-vmstat.nr_zone_active_file
167.00 +0.2% 167.33 ± 2% -75.5% 40.98 proc-vmstat.nr_zone_inactive_file
668461 +0.0% 668461 +4.2% 696493 proc-vmstat.nr_zone_unevictable
722.17 ± 71% -34.7% 471.67 ±136% -98.3% 12.62 ±129% proc-vmstat.numa_hint_faults_local
1437319 ± 24% +377.6% 6864201 -47.8% 750673 ± 7% proc-vmstat.numa_hit
1387016 ± 25% +391.4% 6815486 -49.5% 700947 ± 7% proc-vmstat.numa_local
50329 -0.0% 50324 -1.2% 49704 proc-vmstat.numa_other
4864362 ± 34% +453.6% 26931180 -66.1% 1648373 ± 17% proc-vmstat.pgalloc_normal
4835960 ± 34% +455.4% 26856610 -66.3% 1628178 ± 18% proc-vmstat.pgfree
11.21 +23.7% 13.87 -81.8% 2.04 perf-stat.i.MPKI
7.223e+08 -4.4% 6.907e+08 -3.9% 6.94e+08 perf-stat.i.branch-instructions
2.67 +0.2 2.88 +0.0 2.70 perf-stat.i.branch-miss-rate%
19988363 +2.8% 20539702 -3.1% 19363031 perf-stat.i.branch-misses
17.36 -2.8 14.59 +0.4 17.77 perf-stat.i.cache-miss-rate%
40733859 +19.5% 48659982 -1.9% 39962840 perf-stat.i.cache-references
1482 ± 7% -5.7% 1398 +9.6% 1623 ± 5% perf-stat.i.context-switches
1.76 +3.5% 1.82 +5.1% 1.85 perf-stat.i.cpi
55.21 +5.4% 58.21 ± 2% +0.4% 55.45 perf-stat.i.cpu-migrations
16524721 ± 8% -4.8% 15726404 ± 4% -13.1% 14367627 ± 4% perf-stat.i.dTLB-load-misses
1.01e+09 -3.8% 9.719e+08 -4.4% 9.659e+08 perf-stat.i.dTLB-loads
0.26 ± 4% -0.0 0.23 ± 3% -0.0 0.25 ± 3% perf-stat.i.dTLB-store-miss-rate%
2166022 ± 4% -6.9% 2015917 ± 3% -7.0% 2014037 ± 3% perf-stat.i.dTLB-store-misses
8.503e+08 +5.5% 8.968e+08 -3.5% 8.205e+08 perf-stat.i.dTLB-stores
69.22 ± 4% +6.4 75.60 +14.4 83.60 ± 3% perf-stat.i.iTLB-load-miss-rate%
709457 ± 5% -5.4% 670950 ± 2% +133.6% 1657233 perf-stat.i.iTLB-load-misses
316455 ± 12% -31.6% 216531 ± 3% +3.5% 327592 ± 19% perf-stat.i.iTLB-loads
3.722e+09 -3.1% 3.608e+09 -4.6% 3.553e+09 perf-stat.i.instructions
5243 ± 5% +2.2% 5357 ± 2% -59.1% 2142 perf-stat.i.instructions-per-iTLB-miss
0.57 -3.3% 0.55 -4.8% 0.54 perf-stat.i.ipc
865.04 -10.4% 775.02 ± 3% -2.5% 843.12 perf-stat.i.metric.K/sec
53.84 -0.4% 53.61 -4.0% 51.71 perf-stat.i.metric.M/sec
47.51 -2.1 45.37 +0.7 48.17 perf-stat.i.node-load-miss-rate%
88195 ± 3% +5.2% 92745 ± 4% +16.4% 102647 ± 6% perf-stat.i.node-load-misses
106705 ± 3% +14.8% 122490 ± 5% +13.2% 120774 ± 5% perf-stat.i.node-loads
107169 ± 4% +29.0% 138208 ± 7% +7.5% 115217 ± 5% perf-stat.i.node-stores
10.94 +23.3% 13.49 -81.8% 1.99 perf-stat.overall.MPKI
2.77 +0.2 2.97 +0.0 2.79 perf-stat.overall.branch-miss-rate%
17.28 -2.7 14.56 +0.4 17.67 perf-stat.overall.cache-miss-rate%
1.73 +3.4% 1.79 +5.0% 1.82 perf-stat.overall.cpi
0.25 ± 4% -0.0 0.22 ± 3% -0.0 0.24 ± 3% perf-stat.overall.dTLB-store-miss-rate%
69.20 ± 4% +6.4 75.60 +14.4 83.58 ± 3% perf-stat.overall.iTLB-load-miss-rate%
5260 ± 5% +2.3% 5380 ± 2% -59.2% 2144 perf-stat.overall.instructions-per-iTLB-miss
0.58 -3.2% 0.56 -4.7% 0.55 perf-stat.overall.ipc
45.25 -2.2 43.10 +0.7 45.93 perf-stat.overall.node-load-miss-rate%
7.199e+08 -4.4% 6.883e+08 -3.9% 6.917e+08 perf-stat.ps.branch-instructions
19919808 +2.8% 20469001 -3.1% 19299968 perf-stat.ps.branch-misses
40597326 +19.5% 48497201 -1.9% 39829580 perf-stat.ps.cache-references
1477 ± 7% -5.7% 1393 +9.6% 1618 ± 5% perf-stat.ps.context-switches
55.06 +5.4% 58.03 ± 2% +0.5% 55.32 perf-stat.ps.cpu-migrations
16469488 ± 8% -4.8% 15673772 ± 4% -13.1% 14319828 ± 4% perf-stat.ps.dTLB-load-misses
1.007e+09 -3.8% 9.686e+08 -4.4% 9.627e+08 perf-stat.ps.dTLB-loads
2158768 ± 4% -6.9% 2009174 ± 3% -7.0% 2007326 ± 3% perf-stat.ps.dTLB-store-misses
8.475e+08 +5.5% 8.937e+08 -3.5% 8.178e+08 perf-stat.ps.dTLB-stores
707081 ± 5% -5.4% 668703 ± 2% +133.6% 1651678 perf-stat.ps.iTLB-load-misses
315394 ± 12% -31.6% 215816 ± 3% +3.5% 326463 ± 19% perf-stat.ps.iTLB-loads
3.71e+09 -3.1% 3.595e+09 -4.5% 3.541e+09 perf-stat.ps.instructions
87895 ± 3% +5.2% 92424 ± 4% +16.4% 102341 ± 6% perf-stat.ps.node-load-misses
106351 ± 3% +14.8% 122083 ± 5% +13.2% 120439 ± 5% perf-stat.ps.node-loads
106728 ± 4% +29.1% 137740 ± 7% +7.6% 114824 ± 5% perf-stat.ps.node-stores
1.117e+12 -3.0% 1.084e+12 -4.5% 1.067e+12 perf-stat.total.instructions
10.55 ± 95% -100.0% 0.00 -100.0% 0.00 sched_debug.cfs_rq:/.MIN_vruntime.avg
506.30 ± 95% -100.0% 0.00 -100.0% 0.00 sched_debug.cfs_rq:/.MIN_vruntime.max
0.00 +0.0% 0.00 -100.0% 0.00 sched_debug.cfs_rq:/.MIN_vruntime.min
1.08 ± 7% -7.7% 1.00 -46.2% 0.58 ± 27% sched_debug.cfs_rq:/.h_nr_running.max
538959 ± 24% -23.2% 414090 -58.3% 224671 ± 31% sched_debug.cfs_rq:/.load.max
130191 ± 14% -13.3% 112846 ± 6% -56.6% 56505 ± 39% sched_debug.cfs_rq:/.load.stddev
10.56 ± 95% -100.0% 0.00 -100.0% 0.00 sched_debug.cfs_rq:/.max_vruntime.avg
506.64 ± 95% -100.0% 0.00 -100.0% 0.00 sched_debug.cfs_rq:/.max_vruntime.max
0.00 +0.0% 0.00 -100.0% 0.00 sched_debug.cfs_rq:/.max_vruntime.min
116849 ± 27% -51.2% 56995 ± 20% -66.7% 38966 ± 39% sched_debug.cfs_rq:/.min_vruntime.max
1248 ± 14% +9.8% 1370 ± 15% -29.8% 876.86 ± 16% sched_debug.cfs_rq:/.min_vruntime.min
20484 ± 22% -37.0% 12910 ± 15% -60.7% 8059 ± 32% sched_debug.cfs_rq:/.min_vruntime.stddev
1.08 ± 7% -7.7% 1.00 -46.2% 0.58 ± 27% sched_debug.cfs_rq:/.nr_running.max
1223 ±191% -897.4% -9754 -100.0% 0.00 sched_debug.cfs_rq:/.spread0.avg
107969 ± 29% -65.3% 37448 ± 39% -100.0% 0.00 sched_debug.cfs_rq:/.spread0.max
-7628 +138.2% -18173 -100.0% 0.00 sched_debug.cfs_rq:/.spread0.min
20484 ± 22% -37.0% 12910 ± 15% -100.0% 0.00 sched_debug.cfs_rq:/.spread0.stddev
29.84 ± 19% -1.1% 29.52 ± 14% -100.0% 0.00 sched_debug.cfs_rq:/.util_est_enqueued.avg
569.91 ± 11% +4.5% 595.58 -100.0% 0.00 sched_debug.cfs_rq:/.util_est_enqueued.max
109.06 ± 13% +3.0% 112.32 ± 5% -100.0% 0.00 sched_debug.cfs_rq:/.util_est_enqueued.stddev
910320 +0.0% 910388 -44.2% 507736 ± 28% sched_debug.cpu.avg_idle.avg
1052715 ± 5% -3.8% 1012910 -45.8% 570219 ± 28% sched_debug.cpu.avg_idle.max
175426 ± 8% +2.8% 180422 ± 6% -42.5% 100839 ± 20% sched_debug.cpu.clock.avg
175428 ± 8% +2.8% 180424 ± 6% -42.5% 100840 ± 20% sched_debug.cpu.clock.max
175424 ± 8% +2.8% 180421 ± 6% -42.5% 100838 ± 20% sched_debug.cpu.clock.min
170979 ± 8% +2.8% 175682 ± 6% -42.5% 98373 ± 20% sched_debug.cpu.clock_task.avg
173398 ± 8% +2.6% 177937 ± 6% -42.6% 99568 ± 20% sched_debug.cpu.clock_task.max
165789 ± 8% +3.2% 171014 ± 6% -42.4% 95513 ± 20% sched_debug.cpu.clock_task.min
2178 ± 8% -13.1% 1893 ± 18% -49.7% 1094 ± 33% sched_debug.cpu.clock_task.stddev
7443 ± 4% +1.7% 7566 ± 3% -43.0% 4246 ± 24% sched_debug.cpu.curr->pid.max
1409 ± 2% +1.1% 1426 ± 2% -42.0% 818.46 ± 25% sched_debug.cpu.curr->pid.stddev
502082 +0.0% 502206 -43.9% 281834 ± 29% sched_debug.cpu.max_idle_balance_cost.avg
567767 ± 5% -3.3% 548996 ± 2% -46.6% 303439 ± 27% sched_debug.cpu.max_idle_balance_cost.max
4294 +0.0% 4294 -43.7% 2415 ± 29% sched_debug.cpu.next_balance.avg
4294 +0.0% 4294 -43.7% 2415 ± 29% sched_debug.cpu.next_balance.max
4294 +0.0% 4294 -43.7% 2415 ± 29% sched_debug.cpu.next_balance.min
0.29 ± 3% -1.2% 0.28 -43.0% 0.16 ± 29% sched_debug.cpu.nr_running.stddev
8212 ± 7% -2.2% 8032 ± 4% -40.7% 4867 ± 20% sched_debug.cpu.nr_switches.avg
55209 ± 14% -21.8% 43154 ± 14% -57.0% 23755 ± 20% sched_debug.cpu.nr_switches.max
1272 ± 23% +10.2% 1402 ± 8% -39.1% 775.51 ± 29% sched_debug.cpu.nr_switches.min
9805 ± 13% -13.7% 8459 ± 8% -50.8% 4825 ± 20% sched_debug.cpu.nr_switches.stddev
-15.73 -14.1% -13.52 -64.8% -5.53 sched_debug.cpu.nr_uninterruptible.min
6.08 ± 27% -1.0% 6.02 ± 13% -53.7% 2.82 ± 24% sched_debug.cpu.nr_uninterruptible.stddev
175425 ± 8% +2.8% 180421 ± 6% -42.5% 100838 ± 20% sched_debug.cpu_clk
4.295e+09 +0.0% 4.295e+09 -43.7% 2.416e+09 ± 29% sched_debug.jiffies
174815 ± 8% +2.9% 179811 ± 6% -42.5% 100505 ± 20% sched_debug.ktime
175972 ± 8% +2.8% 180955 ± 6% -42.5% 101150 ± 20% sched_debug.sched_clk
58611259 +0.0% 58611259 -94.0% 3508734 ± 29% sched_debug.sysctl_sched.sysctl_sched_features
0.75 +0.0% 0.75 -100.0% 0.00 sched_debug.sysctl_sched.sysctl_sched_idle_min_granularity
24.00 +0.0% 24.00 -100.0% 0.00 sched_debug.sysctl_sched.sysctl_sched_latency
3.00 +0.0% 3.00 -100.0% 0.00 sched_debug.sysctl_sched.sysctl_sched_min_granularity
4.00 +0.0% 4.00 -100.0% 0.00 sched_debug.sysctl_sched.sysctl_sched_wakeup_granularity
0.26 ±100% -0.3 0.00 +1.2 1.44 ± 9% perf-profile.calltrace.cycles-pp.__x64_sys_close.do_syscall_64.entry_SYSCALL_64_after_hwframe.__close
2.08 ± 26% -0.2 1.87 ± 12% -1.4 0.63 ± 11% perf-profile.calltrace.cycles-pp.syscall_exit_to_user_mode.do_syscall_64.entry_SYSCALL_64_after_hwframe.__close
0.00 +0.0 0.00 +0.7 0.67 ± 11% perf-profile.calltrace.cycles-pp.rcu_sched_clock_irq.update_process_times.tick_sched_handle.tick_nohz_highres_handler.__hrtimer_run_queues
0.00 +0.0 0.00 +0.7 0.71 ± 18% perf-profile.calltrace.cycles-pp.rebalance_domains.__do_softirq.irq_exit_rcu.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt
0.00 +0.0 0.00 +0.8 0.80 ± 14% perf-profile.calltrace.cycles-pp.getname_flags.__do_sys_newstat.do_syscall_64.entry_SYSCALL_64_after_hwframe.__xstat64
0.00 +0.0 0.00 +0.8 0.84 ± 12% perf-profile.calltrace.cycles-pp.__fput.__x64_sys_close.do_syscall_64.entry_SYSCALL_64_after_hwframe.__close
0.00 +0.0 0.00 +1.0 0.98 ± 13% perf-profile.calltrace.cycles-pp.mas_alloc_cyclic.mtree_alloc_cyclic.simple_offset_add.shmem_mknod.lookup_open
0.00 +0.0 0.00 +1.1 1.10 ± 14% perf-profile.calltrace.cycles-pp.mtree_alloc_cyclic.simple_offset_add.shmem_mknod.lookup_open.open_last_lookups
0.00 +0.0 0.00 +1.2 1.20 ± 13% perf-profile.calltrace.cycles-pp.mas_erase.mtree_erase.simple_offset_remove.shmem_unlink.vfs_unlink
0.00 +0.0 0.00 +1.3 1.34 ± 15% perf-profile.calltrace.cycles-pp.link_path_walk.path_lookupat.filename_lookup.vfs_statx.__do_sys_newstat
0.00 +0.0 0.00 +1.4 1.35 ± 12% perf-profile.calltrace.cycles-pp.mtree_erase.simple_offset_remove.shmem_unlink.vfs_unlink.do_unlinkat
0.00 +0.0 0.00 +1.6 1.56 ± 18% perf-profile.calltrace.cycles-pp.__do_softirq.irq_exit_rcu.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt.cpuidle_enter_state
0.00 +0.0 0.00 +1.7 1.73 ± 6% perf-profile.calltrace.cycles-pp.scheduler_tick.update_process_times.tick_sched_handle.tick_nohz_highres_handler.__hrtimer_run_queues
0.00 +0.0 0.00 +1.8 1.80 ± 16% perf-profile.calltrace.cycles-pp.irq_exit_rcu.sysvec_apic_timer_interrupt.asm_sysvec_apic_timer_interrupt.cpuidle_enter_state.cpuidle_enter
0.00 +0.0 0.00 +2.0 2.03 ± 15% perf-profile.calltrace.cycles-pp.path_lookupat.filename_lookup.vfs_statx.__do_sys_newstat.do_syscall_64
0.00 +0.0 0.00 +2.2 2.16 ± 15% perf-profile.calltrace.cycles-pp.filename_lookup.vfs_statx.__do_sys_newstat.do_syscall_64.entry_SYSCALL_64_after_hwframe
0.00 +0.0 0.00 +2.9 2.94 ± 14% perf-profile.calltrace.cycles-pp.vfs_statx.__do_sys_newstat.do_syscall_64.entry_SYSCALL_64_after_hwframe.__xstat64
0.00 +0.0 0.00 +3.2 3.19 ± 8% perf-profile.calltrace.cycles-pp.update_process_times.tick_sched_handle.tick_nohz_highres_handler.__hrtimer_run_queues.hrtimer_interrupt
0.00 +0.0 0.00 +3.4 3.35 ± 8% perf-profile.calltrace.cycles-pp.tick_sched_handle.tick_nohz_highres_handler.__hrtimer_run_queues.hrtimer_interrupt.__sysvec_apic_timer_interrupt
0.00 +0.0 0.00 +3.9 3.88 ± 8% perf-profile.calltrace.cycles-pp.tick_nohz_highres_handler.__hrtimer_run_queues.hrtimer_interrupt.__sysvec_apic_timer_interrupt.sysvec_apic_timer_interrupt
0.00 +0.8 0.75 ± 12% +0.0 0.00 perf-profile.calltrace.cycles-pp.__call_rcu_common.xas_store.__xa_erase.xa_erase.simple_offset_remove
0.00 +0.8 0.78 ± 34% +0.0 0.00 perf-profile.calltrace.cycles-pp.___slab_alloc.kmem_cache_alloc_lru.xas_alloc.xas_create.xas_store
0.00 +0.8 0.83 ± 29% +0.0 0.00 perf-profile.calltrace.cycles-pp.allocate_slab.___slab_alloc.kmem_cache_alloc_lru.xas_alloc.xas_expand
0.00 +0.9 0.92 ± 26% +0.0 0.00 perf-profile.calltrace.cycles-pp.___slab_alloc.kmem_cache_alloc_lru.xas_alloc.xas_expand.xas_create
0.00 +1.0 0.99 ± 27% +0.0 0.00 perf-profile.calltrace.cycles-pp.shuffle_freelist.allocate_slab.___slab_alloc.kmem_cache_alloc_lru.xas_alloc
0.00 +1.0 1.04 ± 28% +0.0 0.00 perf-profile.calltrace.cycles-pp.kmem_cache_alloc_lru.xas_alloc.xas_create.xas_store.__xa_alloc
0.00 +1.1 1.11 ± 26% +0.0 0.00 perf-profile.calltrace.cycles-pp.xas_alloc.xas_create.xas_store.__xa_alloc.__xa_alloc_cyclic
1.51 ± 24% +1.2 2.73 ± 10% +1.2 2.75 ± 10% perf-profile.calltrace.cycles-pp.vfs_unlink.do_unlinkat.__x64_sys_unlink.do_syscall_64.entry_SYSCALL_64_after_hwframe
0.00 +1.2 1.24 ± 20% +0.0 0.00 perf-profile.calltrace.cycles-pp.kmem_cache_alloc_lru.xas_alloc.xas_expand.xas_create.xas_store
0.00 +1.3 1.27 ± 10% +0.0 0.00 perf-profile.calltrace.cycles-pp.xas_store.__xa_erase.xa_erase.simple_offset_remove.shmem_unlink
0.00 +1.3 1.30 ± 10% +0.0 0.00 perf-profile.calltrace.cycles-pp.__xa_erase.xa_erase.simple_offset_remove.shmem_unlink.vfs_unlink
0.00 +1.3 1.33 ± 19% +0.0 0.00 perf-profile.calltrace.cycles-pp.xas_alloc.xas_expand.xas_create.xas_store.__xa_alloc
0.00 +1.4 1.36 ± 10% +0.0 0.00 perf-profile.calltrace.cycles-pp.xa_erase.simple_offset_remove.shmem_unlink.vfs_unlink.do_unlinkat
0.00 +1.4 1.37 ± 10% +1.4 1.37 ± 12% perf-profile.calltrace.cycles-pp.simple_offset_remove.shmem_unlink.vfs_unlink.do_unlinkat.__x64_sys_unlink
0.00 +1.5 1.51 ± 17% +0.0 0.00 perf-profile.calltrace.cycles-pp.xas_expand.xas_create.xas_store.__xa_alloc.__xa_alloc_cyclic
0.00 +1.6 1.62 ± 12% +1.6 1.65 ± 12% perf-profile.calltrace.cycles-pp.shmem_unlink.vfs_unlink.do_unlinkat.__x64_sys_unlink.do_syscall_64
0.00 +2.8 2.80 ± 13% +0.0 0.00 perf-profile.calltrace.cycles-pp.xas_create.xas_store.__xa_alloc.__xa_alloc_cyclic.simple_offset_add
0.00 +2.9 2.94 ± 13% +0.0 0.00 perf-profile.calltrace.cycles-pp.xas_store.__xa_alloc.__xa_alloc_cyclic.simple_offset_add.shmem_mknod
5.38 ± 24% +3.1 8.51 ± 11% +0.6 5.95 ± 11% perf-profile.calltrace.cycles-pp.lookup_open.open_last_lookups.path_openat.do_filp_open.do_sys_openat2
6.08 ± 24% +3.2 9.24 ± 12% +0.5 6.59 ± 10% perf-profile.calltrace.cycles-pp.open_last_lookups.path_openat.do_filp_open.do_sys_openat2.__x64_sys_creat
0.00 +3.2 3.20 ± 13% +0.0 0.00 perf-profile.calltrace.cycles-pp.__xa_alloc.__xa_alloc_cyclic.simple_offset_add.shmem_mknod.lookup_open
0.00 +3.2 3.24 ± 13% +0.0 0.00 perf-profile.calltrace.cycles-pp.__xa_alloc_cyclic.simple_offset_add.shmem_mknod.lookup_open.open_last_lookups
0.00 +3.4 3.36 ± 14% +1.2 1.16 ± 13% perf-profile.calltrace.cycles-pp.simple_offset_add.shmem_mknod.lookup_open.open_last_lookups.path_openat
2.78 ± 25% +3.4 6.17 ± 12% +0.9 3.69 ± 12% perf-profile.calltrace.cycles-pp.shmem_mknod.lookup_open.open_last_lookups.path_openat.do_filp_open
0.16 ± 30% -0.1 0.08 ± 20% -0.0 0.13 ± 42% perf-profile.children.cycles-pp.map_id_up
0.22 ± 18% -0.0 0.16 ± 17% -0.1 0.12 ± 8% perf-profile.children.cycles-pp._raw_spin_lock_irq
0.47 ± 17% -0.0 0.43 ± 16% +1.0 1.49 ± 10% perf-profile.children.cycles-pp.__x64_sys_close
0.02 ±142% -0.0 0.00 +0.1 0.08 ± 22% perf-profile.children.cycles-pp._find_next_zero_bit
0.01 ±223% -0.0 0.00 +2.0 1.97 ± 15% perf-profile.children.cycles-pp.irq_exit_rcu
0.00 +0.0 0.00 +0.1 0.08 ± 30% perf-profile.children.cycles-pp.__wake_up
0.00 +0.0 0.00 +0.1 0.08 ± 21% perf-profile.children.cycles-pp.should_we_balance
0.00 +0.0 0.00 +0.1 0.09 ± 34% perf-profile.children.cycles-pp.amd_clear_divider
0.00 +0.0 0.00 +0.1 0.10 ± 36% perf-profile.children.cycles-pp.apparmor_current_getsecid_subj
0.00 +0.0 0.00 +0.1 0.10 ± 32% perf-profile.children.cycles-pp.filp_flush
0.00 +0.0 0.00 +0.1 0.10 ± 27% perf-profile.children.cycles-pp.mas_wr_end_piv
0.00 +0.0 0.00 +0.1 0.12 ± 27% perf-profile.children.cycles-pp.mnt_get_write_access
0.00 +0.0 0.00 +0.1 0.12 ± 23% perf-profile.children.cycles-pp.file_close_fd
0.00 +0.0 0.00 +0.1 0.13 ± 30% perf-profile.children.cycles-pp.security_current_getsecid_subj
0.00 +0.0 0.00 +0.1 0.13 ± 18% perf-profile.children.cycles-pp.native_apic_mem_eoi
0.00 +0.0 0.00 +0.2 0.17 ± 22% perf-profile.children.cycles-pp.mas_leaf_max_gap
0.00 +0.0 0.00 +0.2 0.18 ± 24% perf-profile.children.cycles-pp.mtree_range_walk
0.00 +0.0 0.00 +0.2 0.20 ± 19% perf-profile.children.cycles-pp.inode_set_ctime_current
0.00 +0.0 0.00 +0.2 0.24 ± 14% perf-profile.children.cycles-pp.ima_file_check
0.00 +0.0 0.00 +0.2 0.24 ± 22% perf-profile.children.cycles-pp.mas_anode_descend
0.00 +0.0 0.00 +0.3 0.26 ± 18% perf-profile.children.cycles-pp.lockref_put_return
0.00 +0.0 0.00 +0.3 0.29 ± 16% perf-profile.children.cycles-pp.mas_wr_walk
0.00 +0.0 0.00 +0.3 0.31 ± 23% perf-profile.children.cycles-pp.mas_update_gap
0.00 +0.0 0.00 +0.3 0.32 ± 17% perf-profile.children.cycles-pp.mas_wr_append
0.00 +0.0 0.00 +0.4 0.37 ± 15% perf-profile.children.cycles-pp.mas_empty_area
0.00 +0.0 0.00 +0.5 0.47 ± 18% perf-profile.children.cycles-pp.mas_wr_node_store
0.00 +0.0 0.00 +0.5 0.53 ± 18% perf-profile.children.cycles-pp.__memcg_slab_post_alloc_hook
0.00 +0.0 0.00 +0.7 0.65 ± 12% perf-profile.children.cycles-pp.__memcg_slab_pre_alloc_hook
0.00 +0.0 0.00 +0.7 0.65 ± 28% perf-profile.children.cycles-pp.__memcg_slab_free_hook
0.00 +0.0 0.00 +1.0 0.99 ± 13% perf-profile.children.cycles-pp.mas_alloc_cyclic
0.00 +0.0 0.00 +1.1 1.11 ± 14% perf-profile.children.cycles-pp.mtree_alloc_cyclic
0.00 +0.0 0.00 +1.2 1.21 ± 14% perf-profile.children.cycles-pp.mas_erase
0.00 +0.0 0.00 +1.4 1.35 ± 12% perf-profile.children.cycles-pp.mtree_erase
0.00 +0.0 0.00 +1.8 1.78 ± 9% perf-profile.children.cycles-pp.entry_SYSCALL_64
0.00 +0.0 0.00 +4.1 4.06 ± 8% perf-profile.children.cycles-pp.tick_nohz_highres_handler
0.02 ±146% +0.1 0.08 ± 13% +0.0 0.06 ± 81% perf-profile.children.cycles-pp.shmem_is_huge
0.02 ±141% +0.1 0.09 ± 16% -0.0 0.00 perf-profile.children.cycles-pp.__list_del_entry_valid
0.00 +0.1 0.08 ± 11% +0.0 0.00 perf-profile.children.cycles-pp.free_unref_page
0.00 +0.1 0.08 ± 13% +0.1 0.08 ± 45% perf-profile.children.cycles-pp.shmem_destroy_inode
0.04 ±101% +0.1 0.14 ± 25% +0.0 0.05 ± 65% perf-profile.children.cycles-pp.rcu_nocb_try_bypass
0.00 +0.1 0.12 ± 27% +0.0 0.00 perf-profile.children.cycles-pp.xas_find_marked
0.02 ±144% +0.1 0.16 ± 14% -0.0 0.00 perf-profile.children.cycles-pp.__unfreeze_partials
0.03 ±106% +0.2 0.19 ± 26% -0.0 0.03 ±136% perf-profile.children.cycles-pp.xas_descend
0.01 ±223% +0.2 0.17 ± 15% -0.0 0.00 perf-profile.children.cycles-pp.get_page_from_freelist
0.11 ± 22% +0.2 0.29 ± 16% -0.0 0.08 ± 30% perf-profile.children.cycles-pp.rcu_segcblist_enqueue
0.02 ±146% +0.2 0.24 ± 13% -0.0 0.01 ±174% perf-profile.children.cycles-pp.__alloc_pages
0.36 ± 79% +0.6 0.98 ± 15% -0.0 0.31 ± 43% perf-profile.children.cycles-pp.__slab_free
0.50 ± 26% +0.7 1.23 ± 14% -0.2 0.31 ± 19% perf-profile.children.cycles-pp.__call_rcu_common
0.00 +0.8 0.82 ± 13% +0.0 0.00 perf-profile.children.cycles-pp.radix_tree_node_rcu_free
0.00 +1.1 1.14 ± 17% +0.0 0.00 perf-profile.children.cycles-pp.radix_tree_node_ctor
0.16 ± 86% +1.2 1.38 ± 16% -0.1 0.02 ±174% perf-profile.children.cycles-pp.setup_object
1.52 ± 25% +1.2 2.75 ± 10% +1.2 2.76 ± 11% perf-profile.children.cycles-pp.vfs_unlink
0.36 ± 22% +1.3 1.63 ± 12% +1.3 1.65 ± 12% perf-profile.children.cycles-pp.shmem_unlink
0.00 +1.3 1.30 ± 10% +0.0 0.00 perf-profile.children.cycles-pp.__xa_erase
0.20 ± 79% +1.3 1.53 ± 15% -0.2 0.02 ±173% perf-profile.children.cycles-pp.shuffle_freelist
0.00 +1.4 1.36 ± 10% +0.0 0.00 perf-profile.children.cycles-pp.xa_erase
0.00 +1.4 1.38 ± 10% +1.4 1.37 ± 12% perf-profile.children.cycles-pp.simple_offset_remove
0.00 +1.5 1.51 ± 17% +0.0 0.00 perf-profile.children.cycles-pp.xas_expand
0.26 ± 78% +1.6 1.87 ± 13% -0.2 0.05 ± 68% perf-profile.children.cycles-pp.allocate_slab
0.40 ± 49% +1.7 2.10 ± 13% -0.3 0.14 ± 28% perf-profile.children.cycles-pp.___slab_alloc
1.30 ± 85% +2.1 3.42 ± 12% -0.1 1.15 ± 41% perf-profile.children.cycles-pp.rcu_do_batch
1.56 ± 27% +2.4 3.93 ± 11% -0.2 1.41 ± 12% perf-profile.children.cycles-pp.kmem_cache_alloc_lru
0.00 +2.4 2.44 ± 12% +0.0 0.00 perf-profile.children.cycles-pp.xas_alloc
2.66 ± 13% +2.5 5.14 ± 5% -2.7 0.00 perf-profile.children.cycles-pp.__irq_exit_rcu
11.16 ± 10% +2.7 13.88 ± 8% +0.6 11.72 ± 8% perf-profile.children.cycles-pp.sysvec_apic_timer_interrupt
11.77 ± 10% +2.7 14.49 ± 8% +0.6 12.40 ± 8% perf-profile.children.cycles-pp.asm_sysvec_apic_timer_interrupt
0.00 +2.8 2.82 ± 13% +0.0 0.00 perf-profile.children.cycles-pp.xas_create
5.40 ± 24% +3.1 8.52 ± 11% +0.6 5.97 ± 11% perf-profile.children.cycles-pp.lookup_open
6.12 ± 24% +3.1 9.27 ± 12% +0.5 6.62 ± 10% perf-profile.children.cycles-pp.open_last_lookups
0.00 +3.2 3.22 ± 13% +0.0 0.00 perf-profile.children.cycles-pp.__xa_alloc
0.00 +3.2 3.24 ± 13% +0.0 0.00 perf-profile.children.cycles-pp.__xa_alloc_cyclic
0.00 +3.4 3.36 ± 14% +1.2 1.16 ± 13% perf-profile.children.cycles-pp.simple_offset_add
2.78 ± 25% +3.4 6.18 ± 12% +0.9 3.70 ± 12% perf-profile.children.cycles-pp.shmem_mknod
0.00 +4.2 4.24 ± 12% +0.0 0.00 perf-profile.children.cycles-pp.xas_store
0.14 ± 27% -0.1 0.08 ± 21% -0.0 0.12 ± 42% perf-profile.self.cycles-pp.map_id_up
0.09 ± 18% -0.0 0.06 ± 52% +0.1 0.14 ± 12% perf-profile.self.cycles-pp.obj_cgroup_charge
0.18 ± 22% -0.0 0.15 ± 17% -0.1 0.10 ± 9% perf-profile.self.cycles-pp._raw_spin_lock_irq
0.02 ±141% -0.0 0.00 +0.1 0.08 ± 22% perf-profile.self.cycles-pp._find_next_zero_bit
0.16 ± 24% -0.0 0.16 ± 24% -0.1 0.07 ± 64% perf-profile.self.cycles-pp.__sysvec_apic_timer_interrupt
0.02 ±146% +0.0 0.02 ±146% +0.1 0.08 ± 18% perf-profile.self.cycles-pp.shmem_mknod
0.00 +0.0 0.00 +0.1 0.09 ± 36% perf-profile.self.cycles-pp.irq_exit_rcu
0.00 +0.0 0.00 +0.1 0.09 ± 28% perf-profile.self.cycles-pp.tick_nohz_highres_handler
0.00 +0.0 0.00 +0.1 0.09 ± 36% perf-profile.self.cycles-pp.apparmor_current_getsecid_subj
0.00 +0.0 0.00 +0.1 0.09 ± 30% perf-profile.self.cycles-pp.mtree_erase
0.00 +0.0 0.00 +0.1 0.10 ± 26% perf-profile.self.cycles-pp.mtree_alloc_cyclic
0.00 +0.0 0.00 +0.1 0.10 ± 27% perf-profile.self.cycles-pp.mas_wr_end_piv
0.00 +0.0 0.00 +0.1 0.12 ± 28% perf-profile.self.cycles-pp.mnt_get_write_access
0.00 +0.0 0.00 +0.1 0.12 ± 29% perf-profile.self.cycles-pp.inode_set_ctime_current
0.00 +0.0 0.00 +0.1 0.12 ± 38% perf-profile.self.cycles-pp.mas_empty_area
0.00 +0.0 0.00 +0.1 0.13 ± 18% perf-profile.self.cycles-pp.native_apic_mem_eoi
0.00 +0.0 0.00 +0.1 0.14 ± 38% perf-profile.self.cycles-pp.mas_update_gap
0.00 +0.0 0.00 +0.1 0.14 ± 20% perf-profile.self.cycles-pp.mas_wr_append
0.00 +0.0 0.00 +0.2 0.16 ± 23% perf-profile.self.cycles-pp.mas_leaf_max_gap
0.00 +0.0 0.00 +0.2 0.18 ± 24% perf-profile.self.cycles-pp.mtree_range_walk
0.00 +0.0 0.00 +0.2 0.18 ± 29% perf-profile.self.cycles-pp.mas_alloc_cyclic
0.00 +0.0 0.00 +0.2 0.20 ± 14% perf-profile.self.cycles-pp.__memcg_slab_pre_alloc_hook
0.00 +0.0 0.00 +0.2 0.22 ± 32% perf-profile.self.cycles-pp.mas_erase
0.00 +0.0 0.00 +0.2 0.24 ± 35% perf-profile.self.cycles-pp.__memcg_slab_free_hook
0.00 +0.0 0.00 +0.2 0.24 ± 22% perf-profile.self.cycles-pp.mas_anode_descend
0.00 +0.0 0.00 +0.3 0.26 ± 17% perf-profile.self.cycles-pp.lockref_put_return
0.00 +0.0 0.00 +0.3 0.27 ± 16% perf-profile.self.cycles-pp.mas_wr_walk
0.00 +0.0 0.00 +0.3 0.34 ± 20% perf-profile.self.cycles-pp.mas_wr_node_store
0.00 +0.0 0.00 +0.4 0.35 ± 20% perf-profile.self.cycles-pp.__memcg_slab_post_alloc_hook
0.00 +0.0 0.00 +1.6 1.59 ± 8% perf-profile.self.cycles-pp.entry_SYSCALL_64
0.05 ± 85% +0.0 0.06 ± 47% +0.1 0.15 ± 54% perf-profile.self.cycles-pp.check_heap_object
0.05 ± 72% +0.0 0.06 ± 81% +0.0 0.10 ± 15% perf-profile.self.cycles-pp.call_cpuidle
0.04 ±105% +0.0 0.04 ± 75% +0.1 0.10 ± 33% perf-profile.self.cycles-pp.putname
0.00 +0.1 0.06 ± 24% +0.0 0.05 ± 66% perf-profile.self.cycles-pp.shmem_destroy_inode
0.00 +0.1 0.07 ± 8% +0.0 0.00 perf-profile.self.cycles-pp.__xa_alloc
0.02 ±146% +0.1 0.11 ± 28% +0.0 0.02 ±133% perf-profile.self.cycles-pp.rcu_nocb_try_bypass
0.01 ±223% +0.1 0.10 ± 28% -0.0 0.00 perf-profile.self.cycles-pp.shuffle_freelist
0.00 +0.1 0.11 ± 40% +0.0 0.00 perf-profile.self.cycles-pp.xas_create
0.00 +0.1 0.12 ± 27% +0.0 0.00 perf-profile.self.cycles-pp.xas_find_marked
0.00 +0.1 0.14 ± 18% +0.0 0.00 perf-profile.self.cycles-pp.xas_alloc
0.03 ±103% +0.1 0.17 ± 29% -0.0 0.03 ±136% perf-profile.self.cycles-pp.xas_descend
0.00 +0.2 0.16 ± 23% +0.0 0.00 perf-profile.self.cycles-pp.xas_expand
0.10 ± 22% +0.2 0.27 ± 16% -0.0 0.06 ± 65% perf-profile.self.cycles-pp.rcu_segcblist_enqueue
0.92 ± 35% +0.3 1.22 ± 11% -0.3 0.59 ± 15% perf-profile.self.cycles-pp.kmem_cache_free
0.00 +0.4 0.36 ± 16% +0.0 0.00 perf-profile.self.cycles-pp.xas_store
0.32 ± 30% +0.4 0.71 ± 12% -0.1 0.18 ± 23% perf-profile.self.cycles-pp.__call_rcu_common
0.18 ± 27% +0.5 0.65 ± 8% +0.1 0.26 ± 21% perf-profile.self.cycles-pp.kmem_cache_alloc_lru
0.36 ± 79% +0.6 0.96 ± 15% -0.0 0.31 ± 42% perf-profile.self.cycles-pp.__slab_free
0.00 +0.8 0.80 ± 14% +0.0 0.00 perf-profile.self.cycles-pp.radix_tree_node_rcu_free
0.00 +1.0 1.01 ± 16% +0.0 0.00 perf-profile.self.cycles-pp.radix_tree_node_ctor
[1] https://lore.kernel.org/all/202402191308.8e7ee8c7-oliver.sang@xxxxxxxxx/
>
>
> > > > > @@ -330,9 +329,9 @@ int simple_offset_empty(struct dentry *dentry)
> > > > > if (!inode || !S_ISDIR(inode->i_mode))
> > > > > return ret;
> > > > >
> > > > > - index = 2;
> > > > > + index = DIR_OFFSET_MIN;
> > > >
> > > > This bit should go into the simple_offset_empty() patch...
> > > >
> > > > > @@ -434,15 +433,15 @@ static loff_t offset_dir_llseek(struct file *file, loff_t offset, int whence)
> > > > >
> > > > > /* In this case, ->private_data is protected by f_pos_lock */
> > > > > file->private_data = NULL;
> > > > > - return vfs_setpos(file, offset, U32_MAX);
> > > > > + return vfs_setpos(file, offset, MAX_LFS_FILESIZE);
> > > > ^^^
> > > > Why this? It is ULONG_MAX << PAGE_SHIFT on 32-bit so that doesn't seem
> > > > quite right? Why not use ULONG_MAX here directly?
> > >
> > > I initially changed U32_MAX to ULONG_MAX, but for some reason, the
> > > length checking in vfs_setpos() fails. There is probably a sign
> > > extension thing happening here that I don't understand.
> > >
> > >
> > > > Otherwise the patch looks good to me.
> > >
> > > As always, thank you for your review.
> > >
> > >
> > > --
> > > Chuck Lever
>
> --
> Chuck Lever