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Message-ID: <20200702091158.GK3874@shao2-debian>
Date: Thu, 2 Jul 2020 17:11:58 +0800
From: kernel test robot <rong.a.chen@...el.com>
To: Muchun Song <songmuchun@...edance.com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>,
Roman Gushchin <guro@...com>, Michal Hocko <mhocko@...e.com>,
Johannes Weiner <hannes@...xchg.org>,
Vladimir Davydov <vdavydov.dev@...il.com>,
Qian Cai <cai@....pw>,
Andrew Morton <akpm@...ux-foundation.org>,
LKML <linux-kernel@...r.kernel.org>, lkp@...ts.01.org
Subject: [mm/memcontrol.c] 3a98990ae2: will-it-scale.per_process_ops 17.6%
improvement
Greeting,
FYI, we noticed a 17.6% improvement of will-it-scale.per_process_ops due to commit:
commit: 3a98990ae2150277ed34d3b248c60e68bf2244b2 ("mm/memcontrol.c: add missed css_put()")
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
in testcase: will-it-scale
on test machine: 192 threads Intel(R) Xeon(R) Platinum 9242 CPU @ 2.30GHz with 192G memory
with following parameters:
nr_task: 50%
mode: process
test: page_fault3
cpufreq_governor: performance
ucode: 0x5002f01
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
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-7.6/process/50%/debian-x86_64-20191114.cgz/lkp-csl-2ap3/page_fault3/will-it-scale/0x5002f01
commit:
cd324edce5 ("mm: memcontrol: handle div0 crash race condition in memory.low")
3a98990ae2 ("mm/memcontrol.c: add missed css_put()")
cd324edce598ebdd 3a98990ae2150277ed34d3b248c
---------------- ---------------------------
fail:runs %reproduction fail:runs
| | |
22:4 88% 26:4 perf-profile.calltrace.cycles-pp.sync_regs.error_entry
25:4 100% 30:4 perf-profile.calltrace.cycles-pp.error_entry
0:4 1% 0:4 perf-profile.children.cycles-pp.error_return
27:4 107% 31:4 perf-profile.children.cycles-pp.error_entry
3:4 14% 3:4 perf-profile.self.cycles-pp.error_entry
%stddev %change %stddev
\ | \
816090 +17.6% 959398 will-it-scale.per_process_ops
78344698 +17.6% 92102246 will-it-scale.workload
1386196 ± 4% +11.5% 1545940 ± 4% meminfo.DirectMap4k
10.35 ± 4% -2.6 7.73 ± 2% mpstat.cpu.all.usr%
583.84 +9.7% 640.64 ± 6% sched_debug.cfs_rq:/.util_avg.avg
14192 ± 6% -5.2% 13456 ± 3% slabinfo.skbuff_head_cache.active_objs
9.50 ± 9% -26.3% 7.00 vmstat.cpu.us
2239 +2.9% 2303 vmstat.system.cs
83616 ± 59% -66.1% 28322 ±173% numa-meminfo.node2.AnonHugePages
146070 ± 33% -62.7% 54505 ±112% numa-meminfo.node2.AnonPages
7688 ± 8% -12.3% 6742 ± 3% numa-meminfo.node2.PageTables
6070 ± 18% -79.7% 1232 ±168% proc-vmstat.numa_hint_faults_local
50826584 +16.1% 58997489 proc-vmstat.numa_hit
50733426 +16.1% 58904352 proc-vmstat.numa_local
50995327 +16.1% 59188836 proc-vmstat.pgalloc_normal
2.356e+10 +17.5% 2.769e+10 proc-vmstat.pgfault
48137715 +16.2% 55946671 proc-vmstat.pgfree
12465628 +17.8% 14686105 numa-numastat.node0.local_node
12496560 +17.8% 14717057 numa-numastat.node0.numa_hit
12774189 +15.8% 14794996 numa-numastat.node1.local_node
12797480 +15.8% 14818293 numa-numastat.node1.numa_hit
12839343 +15.1% 14784197 numa-numastat.node2.local_node
12862682 +15.2% 14815225 numa-numastat.node2.numa_hit
12715592 +15.8% 14728262 numa-numastat.node3.local_node
12731168 +15.7% 14736092 numa-numastat.node3.numa_hit
7054845 +15.4% 8144671 numa-vmstat.node0.numa_hit
6935425 +15.7% 8025335 numa-vmstat.node0.numa_local
7156041 +14.8% 8214026 numa-vmstat.node1.numa_hit
7116597 +14.9% 8174605 numa-vmstat.node1.numa_local
36535 ± 33% -62.7% 13635 ±112% numa-vmstat.node2.nr_anon_pages
1923 ± 8% -12.4% 1684 ± 3% numa-vmstat.node2.nr_page_table_pages
7217832 +13.1% 8162065 numa-vmstat.node2.numa_hit
7090042 +13.2% 8026683 numa-vmstat.node2.numa_local
7142761 +14.6% 8184149 numa-vmstat.node3.numa_hit
7022610 +14.9% 8071610 numa-vmstat.node3.numa_local
488.25 ± 14% +64.7% 804.00 ± 41% interrupts.CPU0.CAL:Function_call_interrupts
7269 ± 34% -40.5% 4329 ± 58% interrupts.CPU1.NMI:Non-maskable_interrupts
7269 ± 34% -40.5% 4329 ± 58% interrupts.CPU1.PMI:Performance_monitoring_interrupts
2143 ± 33% +152.5% 5412 ± 39% interrupts.CPU102.NMI:Non-maskable_interrupts
2143 ± 33% +152.5% 5412 ± 39% interrupts.CPU102.PMI:Performance_monitoring_interrupts
122.50 ± 77% -96.5% 4.25 ±115% interrupts.CPU138.RES:Rescheduling_interrupts
64.75 ±108% -91.9% 5.25 ± 51% interrupts.CPU140.RES:Rescheduling_interrupts
8729 -58.9% 3584 ± 34% interrupts.CPU151.NMI:Non-maskable_interrupts
8729 -58.9% 3584 ± 34% interrupts.CPU151.PMI:Performance_monitoring_interrupts
3236 ± 19% +101.0% 6503 ± 37% interrupts.CPU186.NMI:Non-maskable_interrupts
3236 ± 19% +101.0% 6503 ± 37% interrupts.CPU186.PMI:Performance_monitoring_interrupts
2857 +171.6% 7761 ± 15% interrupts.CPU188.NMI:Non-maskable_interrupts
2857 +171.6% 7761 ± 15% interrupts.CPU188.PMI:Performance_monitoring_interrupts
122.75 ± 76% -66.8% 40.75 ±154% interrupts.CPU20.RES:Rescheduling_interrupts
8729 -39.8% 5257 ± 47% interrupts.CPU3.NMI:Non-maskable_interrupts
8729 -39.8% 5257 ± 47% interrupts.CPU3.PMI:Performance_monitoring_interrupts
800.50 +25.6% 1005 ± 19% interrupts.CPU38.CAL:Function_call_interrupts
2866 +166.3% 7633 ± 24% interrupts.CPU55.NMI:Non-maskable_interrupts
2866 +166.3% 7633 ± 24% interrupts.CPU55.PMI:Performance_monitoring_interrupts
110.25 ± 95% -63.5% 40.25 ±156% interrupts.CPU58.RES:Rescheduling_interrupts
7637 ± 24% -38.5% 4699 ± 51% interrupts.CPU6.NMI:Non-maskable_interrupts
7637 ± 24% -38.5% 4699 ± 51% interrupts.CPU6.PMI:Performance_monitoring_interrupts
804.75 +1360.1% 11750 ±159% interrupts.CPU7.CAL:Function_call_interrupts
801.50 +62.1% 1299 ± 60% interrupts.CPU75.CAL:Function_call_interrupts
2877 ± 36% +126.1% 6507 ± 37% interrupts.CPU84.NMI:Non-maskable_interrupts
2877 ± 36% +126.1% 6507 ± 37% interrupts.CPU84.PMI:Performance_monitoring_interrupts
2891 ± 35% +113.5% 6172 ± 42% interrupts.CPU88.NMI:Non-maskable_interrupts
2891 ± 35% +113.5% 6172 ± 42% interrupts.CPU88.PMI:Performance_monitoring_interrupts
157.25 ± 56% -74.1% 40.75 ±153% interrupts.CPU90.RES:Rescheduling_interrupts
6542 ± 33% -47.4% 3441 ± 16% interrupts.CPU92.NMI:Non-maskable_interrupts
6542 ± 33% -47.4% 3441 ± 16% interrupts.CPU92.PMI:Performance_monitoring_interrupts
177.00 ± 40% -96.9% 5.50 ± 37% interrupts.CPU93.RES:Rescheduling_interrupts
16478 ± 5% -10.7% 14710 ± 2% softirqs.CPU1.RCU
15434 ± 6% -10.7% 13788 ± 3% softirqs.CPU107.RCU
15727 ± 8% -9.4% 14256 ± 9% softirqs.CPU112.RCU
15720 ± 7% -11.4% 13927 ± 8% softirqs.CPU114.RCU
16890 ± 3% -15.1% 14340 ± 10% softirqs.CPU127.RCU
16036 ± 3% -15.1% 13607 ± 8% softirqs.CPU138.RCU
17390 ± 73% +119.5% 38170 ± 11% softirqs.CPU138.SCHED
11134 ± 45% +44.5% 16084 ± 16% softirqs.CPU139.SCHED
104957 ± 10% -10.0% 94436 ± 4% softirqs.CPU149.TIMER
5856 ± 26% +315.3% 24324 ± 47% softirqs.CPU150.SCHED
96752 ± 4% +15.3% 111562 ± 12% softirqs.CPU150.TIMER
16447 ± 4% -15.7% 13869 ± 9% softirqs.CPU151.RCU
10162 ± 92% +182.7% 28733 ± 28% softirqs.CPU151.SCHED
16631 ± 4% -8.9% 15143 ± 5% softirqs.CPU161.RCU
15476 ± 7% -14.2% 13277 ± 5% softirqs.CPU170.RCU
15192 ± 6% -13.5% 13143 ± 6% softirqs.CPU173.RCU
15535 ± 6% -13.8% 13389 ± 6% softirqs.CPU175.RCU
15214 ± 4% -13.1% 13221 ± 7% softirqs.CPU176.RCU
36899 ± 12% -59.7% 14881 ± 76% softirqs.CPU189.SCHED
119647 ± 8% -16.1% 100430 ± 9% softirqs.CPU189.TIMER
15761 ± 7% -8.7% 14396 ± 4% softirqs.CPU22.RCU
16909 ± 8% -9.9% 15237 ± 8% softirqs.CPU25.RCU
16714 ± 3% -13.5% 14456 ± 4% softirqs.CPU3.RCU
12479 ± 33% +98.0% 24709 ± 41% softirqs.CPU3.SCHED
16843 ± 7% -12.3% 14765 ± 6% softirqs.CPU30.RCU
109803 ± 6% -15.1% 93182 ± 2% softirqs.CPU42.TIMER
16129 ± 4% -13.3% 13978 ± 9% softirqs.CPU49.RCU
21022 ± 61% +52.4% 32031 ± 28% softirqs.CPU5.SCHED
15860 ± 6% -14.0% 13636 ± 9% softirqs.CPU53.RCU
37063 ± 6% -46.3% 19910 ± 55% softirqs.CPU54.SCHED
16373 ± 4% -9.5% 14820 ± 5% softirqs.CPU6.RCU
16710 ± 8% -10.8% 14904 ± 2% softirqs.CPU66.RCU
16491 ± 7% -9.5% 14932 ± 8% softirqs.CPU68.RCU
17296 ± 3% -14.0% 14875 ± 8% softirqs.CPU72.RCU
15282 ± 2% -8.7% 13953 ± 6% softirqs.CPU75.RCU
16402 -10.0% 14769 ± 5% softirqs.CPU76.RCU
16116 ± 5% -12.8% 14055 ± 3% softirqs.CPU78.RCU
14928 ± 5% -9.7% 13473 ± 7% softirqs.CPU81.RCU
15305 ± 5% -9.7% 13824 ± 8% softirqs.CPU85.RCU
15870 ± 6% -10.8% 14152 ± 8% softirqs.CPU91.RCU
16314 ± 4% -12.2% 14319 ± 7% softirqs.CPU92.RCU
16131 -16.0% 13548 ± 11% softirqs.CPU93.RCU
5823 ± 59% +403.2% 29303 ± 39% softirqs.CPU93.SCHED
96719 ± 6% +21.3% 117354 ± 10% softirqs.CPU93.TIMER
28006 ± 30% -35.0% 18196 ± 35% softirqs.CPU97.SCHED
2.21 -15.6% 1.87 perf-stat.i.MPKI
4.2e+10 +17.4% 4.93e+10 perf-stat.i.branch-instructions
1.052e+08 +17.2% 1.233e+08 perf-stat.i.branch-misses
42.41 +1.0 43.37 perf-stat.i.cache-miss-rate%
1.929e+08 +1.4% 1.955e+08 perf-stat.i.cache-misses
2211 ± 2% +2.9% 2275 perf-stat.i.context-switches
1.45 -14.8% 1.23 perf-stat.i.cpi
1548 -1.3% 1527 perf-stat.i.cycles-between-cache-misses
2740421 ± 3% +16.7% 3197740 ± 4% perf-stat.i.dTLB-load-misses
5.784e+10 +17.4% 6.791e+10 perf-stat.i.dTLB-loads
2.339e+09 +17.9% 2.759e+09 perf-stat.i.dTLB-store-misses
2.937e+10 +17.4% 3.448e+10 perf-stat.i.dTLB-stores
2.403e+08 +16.1% 2.791e+08 perf-stat.i.iTLB-load-misses
2707233 -3.0% 2626312 ± 2% perf-stat.i.iTLB-loads
2.067e+11 +17.4% 2.427e+11 perf-stat.i.instructions
0.69 +17.4% 0.81 perf-stat.i.ipc
0.01 +11.6% 0.01 ± 13% perf-stat.i.metric.K/sec
688.78 +17.3% 808.24 perf-stat.i.metric.M/sec
77964830 +17.5% 91630478 perf-stat.i.minor-faults
16.06 -9.2 6.87 ± 7% perf-stat.i.node-load-miss-rate%
2444096 -56.3% 1068500 ± 8% perf-stat.i.node-load-misses
13040793 +15.9% 15113454 perf-stat.i.node-loads
5876763 +17.7% 6915066 perf-stat.i.node-store-misses
78577487 +17.4% 92247555 perf-stat.i.node-stores
77964830 +17.5% 91630478 perf-stat.i.page-faults
2.20 -15.6% 1.85 perf-stat.overall.MPKI
42.50 +1.0 43.47 perf-stat.overall.cache-miss-rate%
1.44 -14.8% 1.23 perf-stat.overall.cpi
1545 -1.4% 1524 perf-stat.overall.cycles-between-cache-misses
0.69 +17.4% 0.81 perf-stat.overall.ipc
15.78 -9.2 6.60 ± 8% perf-stat.overall.node-load-miss-rate%
4.186e+10 +17.4% 4.914e+10 perf-stat.ps.branch-instructions
1.048e+08 +17.2% 1.228e+08 perf-stat.ps.branch-misses
1.924e+08 +1.4% 1.95e+08 perf-stat.ps.cache-misses
2186 +2.9% 2250 perf-stat.ps.context-switches
2725763 ± 3% +16.9% 3187700 ± 4% perf-stat.ps.dTLB-load-misses
5.764e+10 +17.4% 6.769e+10 perf-stat.ps.dTLB-loads
2.331e+09 +17.9% 2.75e+09 perf-stat.ps.dTLB-store-misses
2.927e+10 +17.4% 3.437e+10 perf-stat.ps.dTLB-stores
2.395e+08 +16.1% 2.781e+08 perf-stat.ps.iTLB-load-misses
2696794 -3.0% 2616040 ± 2% perf-stat.ps.iTLB-loads
2.061e+11 +17.4% 2.419e+11 perf-stat.ps.instructions
77707624 +17.5% 91329166 perf-stat.ps.minor-faults
2435827 -56.3% 1064249 ± 8% perf-stat.ps.node-load-misses
12997344 +15.9% 15069284 perf-stat.ps.node-loads
5856974 +17.7% 6892404 perf-stat.ps.node-store-misses
78316534 +17.4% 91943807 perf-stat.ps.node-stores
77707624 +17.5% 91329166 perf-stat.ps.page-faults
6.224e+13 +17.4% 7.306e+13 perf-stat.total.instructions
7.59 -4.3 3.27 ± 12% perf-profile.calltrace.cycles-pp.__count_memcg_events.handle_mm_fault.do_user_addr_fault.exc_page_fault.asm_exc_page_fault
30.10 -3.6 26.53 ± 11% perf-profile.calltrace.cycles-pp.handle_mm_fault.do_user_addr_fault.exc_page_fault.asm_exc_page_fault
35.03 -2.8 32.28 ± 10% perf-profile.calltrace.cycles-pp.do_user_addr_fault.exc_page_fault.asm_exc_page_fault
5.96 -1.8 4.20 ± 11% perf-profile.calltrace.cycles-pp.page_add_file_rmap.alloc_set_pte.finish_fault.do_fault.__handle_mm_fault
2.66 -1.6 1.09 ± 10% perf-profile.calltrace.cycles-pp.lock_page_memcg.page_add_file_rmap.alloc_set_pte.finish_fault.do_fault
7.71 -1.5 6.18 ± 11% perf-profile.calltrace.cycles-pp.alloc_set_pte.finish_fault.do_fault.__handle_mm_fault.handle_mm_fault
8.04 -1.5 6.55 ± 11% perf-profile.calltrace.cycles-pp.finish_fault.do_fault.__handle_mm_fault.handle_mm_fault.do_user_addr_fault
3.62 -0.3 3.30 ± 11% perf-profile.calltrace.cycles-pp.page_remove_rmap.unmap_page_range.unmap_vmas.unmap_region.__do_munmap
1.22 -0.2 1.01 ± 9% perf-profile.calltrace.cycles-pp.__mod_memcg_state.__mod_lruvec_state.page_remove_rmap.unmap_page_range.unmap_vmas
1.28 -0.2 1.10 ± 11% perf-profile.calltrace.cycles-pp.__mod_memcg_state.__mod_lruvec_state.page_add_file_rmap.alloc_set_pte.finish_fault
1.89 -0.1 1.75 ± 10% perf-profile.calltrace.cycles-pp.__mod_lruvec_state.page_remove_rmap.unmap_page_range.unmap_vmas.unmap_region
31.64 +5.6 37.29 ± 17% perf-profile.calltrace.cycles-pp.cpu_startup_entry.start_secondary.secondary_startup_64
31.64 +5.6 37.29 ± 17% perf-profile.calltrace.cycles-pp.do_idle.cpu_startup_entry.start_secondary.secondary_startup_64
31.64 +5.6 37.29 ± 17% perf-profile.calltrace.cycles-pp.start_secondary.secondary_startup_64
31.63 +5.7 37.29 ± 17% perf-profile.calltrace.cycles-pp.cpuidle_enter.do_idle.cpu_startup_entry.start_secondary.secondary_startup_64
31.63 +5.7 37.29 ± 17% perf-profile.calltrace.cycles-pp.cpuidle_enter_state.cpuidle_enter.do_idle.cpu_startup_entry.start_secondary
31.99 +5.7 37.70 ± 17% perf-profile.calltrace.cycles-pp.secondary_startup_64
31.62 +5.8 37.41 ± 18% perf-profile.calltrace.cycles-pp.intel_idle.cpuidle_enter_state.cpuidle_enter.do_idle.cpu_startup_entry
15.54 -4.7 10.87 ± 10% perf-profile.children.cycles-pp.native_irq_return_iret
7.59 -4.3 3.27 ± 12% perf-profile.children.cycles-pp.__count_memcg_events
30.28 -3.5 26.75 ± 10% perf-profile.children.cycles-pp.handle_mm_fault
35.11 -2.7 32.36 ± 10% perf-profile.children.cycles-pp.do_user_addr_fault
3.36 -1.9 1.50 ± 10% perf-profile.children.cycles-pp.lock_page_memcg
6.01 -1.7 4.27 ± 11% perf-profile.children.cycles-pp.page_add_file_rmap
7.89 -1.5 6.39 ± 11% perf-profile.children.cycles-pp.alloc_set_pte
8.08 -1.5 6.60 ± 11% perf-profile.children.cycles-pp.finish_fault
2.52 -0.4 2.14 ± 10% perf-profile.children.cycles-pp.__mod_memcg_state
3.69 -0.3 3.39 ± 11% perf-profile.children.cycles-pp.page_remove_rmap
0.31 -0.1 0.21 ± 10% perf-profile.children.cycles-pp.__unlock_page_memcg
0.05 ± 8% +0.0 0.07 ± 6% perf-profile.children.cycles-pp.native_set_pte_at
0.36 +0.1 0.44 ± 9% perf-profile.children.cycles-pp.__set_page_dirty_no_writeback
31.64 +5.6 37.29 ± 17% perf-profile.children.cycles-pp.start_secondary
31.99 +5.7 37.70 ± 17% perf-profile.children.cycles-pp.secondary_startup_64
31.99 +5.7 37.70 ± 17% perf-profile.children.cycles-pp.cpu_startup_entry
31.99 +5.7 37.70 ± 17% perf-profile.children.cycles-pp.do_idle
31.98 +5.7 37.69 ± 17% perf-profile.children.cycles-pp.intel_idle
31.99 +5.7 37.70 ± 17% perf-profile.children.cycles-pp.cpuidle_enter
31.99 +5.7 37.70 ± 17% perf-profile.children.cycles-pp.cpuidle_enter_state
15.54 -4.7 10.87 ± 10% perf-profile.self.cycles-pp.native_irq_return_iret
7.56 -4.3 3.25 ± 11% perf-profile.self.cycles-pp.__count_memcg_events
3.31 -1.9 1.45 ± 11% perf-profile.self.cycles-pp.lock_page_memcg
2.47 -0.4 2.08 ± 10% perf-profile.self.cycles-pp.__mod_memcg_state
1.31 -0.1 1.19 ± 12% perf-profile.self.cycles-pp.page_add_file_rmap
0.31 -0.1 0.20 ± 10% perf-profile.self.cycles-pp.__unlock_page_memcg
0.07 ± 5% +0.0 0.10 ± 35% perf-profile.self.cycles-pp.mem_cgroup_from_task
0.30 +0.1 0.38 ± 8% perf-profile.self.cycles-pp.__set_page_dirty_no_writeback
31.98 +5.7 37.69 ± 17% perf-profile.self.cycles-pp.intel_idle
will-it-scale.per_process_ops
980000 +------------------------------------------------------------------+
| |
960000 |-O O O O O O O O O O O O O O O O O O |
940000 |-+ |
| |
920000 |-+ |
900000 |-+ |
| |
880000 |-+ |
860000 |-+ |
| |
840000 |-+ |
820000 |-+ .+.+. .+.. .+. |
|.+.+..+.+.+.+. +.+..+.+.+.+..+.+.+.+ +.+.+.+. +.+.+..+.+.|
800000 +------------------------------------------------------------------+
will-it-scale.workload
9.4e+07 +-----------------------------------------------------------------+
| |
9.2e+07 |-O O O O O O O O O O O O O O O O O O |
9e+07 |-+ |
| |
8.8e+07 |-+ |
| |
8.6e+07 |-+ |
| |
8.4e+07 |-+ |
8.2e+07 |-+ |
| |
8e+07 |-+ |
| .+..+. .+. .+. .+. |
7.8e+07 +-----------------------------------------------------------------+
[*] 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
View attachment "config-5.8.0-rc2-00124-g3a98990ae2150" of type "text/plain" (206161 bytes)
View attachment "job-script" of type "text/plain" (7527 bytes)
View attachment "job.yaml" of type "text/plain" (5097 bytes)
View attachment "reproduce" of type "text/plain" (343 bytes)
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