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Date: Tue, 8 Oct 2019 16:57:55 +0800
From: kernel test robot <rong.a.chen@...el.com>
To: Song Liu <songliubraving@...com>
Cc: linux-kernel@...r.kernel.org, kernel-team@...com,
Song Liu <songliubraving@...com>, stable@...r.kernel.org,
Peter Zijlstra <peterz@...radead.org>,
Arnaldo Carvalho de Melo <acme@...nel.org>,
Thomas Gleixner <tglx@...utronix.de>, lkp@...org
Subject: [perf/core] a449d92620: vm-scalability.median -6.8% regression
Greeting,
FYI, we noticed a -6.8% regression of vm-scalability.median due to commit:
commit: a449d926203c733fecddc1fd077cf3d6ecef7f15 ("[PATCH] perf/core: fix corner case in perf_rotate_context()")
url: https://github.com/0day-ci/linux/commits/Song-Liu/perf-core-fix-corner-case-in-perf_rotate_context/20191003-144432
in testcase: vm-scalability
on test machine: 4 threads Intel(R) Core(TM) i3-3220 CPU @ 3.30GHz with 8G memory
with following parameters:
runtime: 300s
size: 8T
test: anon-w-seq
cpufreq_governor: performance
ucode: 0x21
test-description: The motivation behind this suite is to exercise functions and regions of the mm/ of the Linux kernel which are of interest to us.
test-url: https://git.kernel.org/cgit/linux/kernel/git/wfg/vm-scalability.git/
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/rootfs/runtime/size/tbox_group/test/testcase/ucode:
gcc-7/performance/x86_64-rhel-7.6/debian-x86_64-2019-09-23.cgz/300s/8T/lkp-ivb-d02/anon-w-seq/vm-scalability/0x21
commit:
e336b40277 ("kprobes: Prohibit probing on BUG() and WARN() address")
a449d92620 ("perf/core: fix corner case in perf_rotate_context()")
e336b4027775cb45 a449d926203c733fecddc1fd077
---------------- ---------------------------
%stddev %change %stddev
\ | \
0.00 ± 2% +3.8% 0.00 vm-scalability.free_time
1235827 -6.8% 1151821 vm-scalability.median
0.02 ± 8% +51.1% 0.03 ± 5% vm-scalability.median_stddev
4931119 -6.6% 4606513 vm-scalability.throughput
1624883 -6.4% 1521193 vm-scalability.time.minor_page_faults
228.43 ± 3% +20.6% 275.45 vm-scalability.time.system_time
919.50 -5.6% 867.64 vm-scalability.time.user_time
11336 -3.9% 10895 vm-scalability.time.voluntary_context_switches
1.432e+09 -7.1% 1.33e+09 vm-scalability.workload
2.07 ± 4% +0.7 2.81 ± 14% mpstat.cpu.all.idle%
20.04 ± 3% +3.8 23.89 mpstat.cpu.all.sys%
77.00 -5.8% 72.50 vmstat.cpu.us
7171 -3.0% 6958 vmstat.system.cs
12591513 ± 16% +60.0% 20142845 ± 27% cpuidle.C6.time
21824 ± 11% +44.6% 31557 ± 19% cpuidle.C6.usage
1123 ± 17% +86.2% 2092 ± 24% cpuidle.POLL.usage
8568 +11.3% 9539 interrupts.CAL:Function_call_interrupts
7614 ± 33% +87.5% 14280 ± 25% interrupts.CPU3.RES:Rescheduling_interrupts
15566 ± 20% +120.5% 34321 ± 28% interrupts.NMI:Non-maskable_interrupts
15566 ± 20% +120.5% 34321 ± 28% interrupts.PMI:Performance_monitoring_interrupts
37492 ± 9% +33.8% 50168 ± 2% interrupts.RES:Rescheduling_interrupts
31894 ± 6% -19.7% 25618 ± 5% softirqs.CPU0.RCU
32409 ± 6% -21.5% 25453 ± 8% softirqs.CPU1.RCU
35578 ± 3% -26.0% 26329 ± 11% softirqs.CPU2.RCU
33765 ± 9% -28.8% 24030 ± 3% softirqs.CPU3.RCU
133648 ± 4% -24.1% 101433 ± 5% softirqs.RCU
21819 ± 11% +44.6% 31556 ± 19% turbostat.C6
1.04 ± 16% +0.6 1.66 ± 26% turbostat.C6%
0.27 ± 29% +247.2% 0.94 ± 41% turbostat.CPU%c6
18.86 -2.1% 18.46 turbostat.CorWatt
0.02 ± 44% +520.0% 0.15 ± 40% turbostat.Pkg%pc2
0.02 ±101% +1466.7% 0.35 ± 63% turbostat.Pkg%pc6
37.19 -1.5% 36.64 turbostat.PkgWatt
2167377 +51.8% 3289728 ± 2% meminfo.Active
2165895 +51.8% 3288244 ± 2% meminfo.Active(anon)
2006718 +53.7% 3085007 ± 2% meminfo.AnonHugePages
2151900 +49.3% 3213568 ± 2% meminfo.AnonPages
141552 -60.7% 55678 ± 8% meminfo.CmaFree
4584114 -24.5% 3458742 meminfo.MemAvailable
4694537 -24.0% 3569088 meminfo.MemFree
3337073 +33.7% 4462514 meminfo.Memused
7677 +27.5% 9791 meminfo.PageTables
9532 ± 12% -38.9% 5820 ± 20% sched_debug.cfs_rq:/.min_vruntime.stddev
29.67 ± 4% -17.8% 24.38 ± 3% sched_debug.cfs_rq:/.nr_spread_over.max
11.21 ± 6% -16.5% 9.36 ± 2% sched_debug.cfs_rq:/.nr_spread_over.stddev
103675 ± 28% -22.0% 80844 ± 6% sched_debug.cfs_rq:/.runnable_weight.stddev
20991 ± 40% -72.0% 5881 ± 52% sched_debug.cfs_rq:/.spread0.max
9528 ± 12% -38.9% 5820 ± 20% sched_debug.cfs_rq:/.spread0.stddev
371922 ± 10% +22.9% 456951 ± 8% sched_debug.cpu.avg_idle.min
191541 ± 12% -19.1% 154992 ± 8% sched_debug.cpu.avg_idle.stddev
318.92 ± 68% -59.2% 130.17 ±124% sched_debug.cpu.curr->pid.stddev
540668 +35.4% 732070 ± 3% proc-vmstat.nr_active_anon
536027 +30.6% 700171 ± 4% proc-vmstat.nr_anon_pages
977.25 +34.4% 1313 ± 4% proc-vmstat.nr_anon_transparent_hugepages
114025 -16.8% 94860 ± 2% proc-vmstat.nr_dirty_background_threshold
228332 -16.8% 189953 ± 2% proc-vmstat.nr_dirty_threshold
35358 -49.5% 17856 ± 8% proc-vmstat.nr_free_cma
1174409 -16.3% 982468 ± 2% proc-vmstat.nr_free_pages
1920 +17.3% 2252 ± 2% proc-vmstat.nr_page_table_pages
6783 +3.2% 7000 proc-vmstat.nr_shmem
540670 +35.4% 732059 ± 3% proc-vmstat.nr_zone_active_anon
2505028 -5.5% 2366487 proc-vmstat.numa_hit
2505028 -5.5% 2366487 proc-vmstat.numa_local
1609 ± 5% +30.7% 2103 ± 10% proc-vmstat.pgactivate
72313983 -7.6% 66816607 ± 2% proc-vmstat.pgalloc_dma32
2.472e+08 -6.9% 2.301e+08 proc-vmstat.pgalloc_normal
2007636 -5.0% 1907338 proc-vmstat.pgfault
3.193e+08 -7.2% 2.963e+08 proc-vmstat.pgfree
619835 -7.2% 575294 proc-vmstat.thp_deferred_split_page
620290 -7.1% 576268 proc-vmstat.thp_fault_alloc
4.948e+09 -8.6% 4.525e+09 perf-stat.i.branch-instructions
71787571 -6.5% 67122869 perf-stat.i.cache-misses
79483511 -7.0% 73906455 perf-stat.i.cache-references
7224 -2.9% 7017 perf-stat.i.context-switches
0.82 +7.9% 0.88 perf-stat.i.cpi
1.272e+10 -1.1% 1.258e+10 perf-stat.i.cpu-cycles
96.49 ± 10% -22.6% 74.70 ± 2% perf-stat.i.cpu-migrations
185.50 +3.7% 192.42 perf-stat.i.cycles-between-cache-misses
3.354e+09 -6.7% 3.129e+09 perf-stat.i.dTLB-loads
0.01 ± 5% +0.0 0.01 ± 4% perf-stat.i.dTLB-store-miss-rate%
1.419e+09 -6.9% 1.321e+09 perf-stat.i.dTLB-stores
1.558e+10 -7.8% 1.437e+10 perf-stat.i.instructions
1.22 -6.8% 1.14 perf-stat.i.ipc
6581 -5.4% 6226 perf-stat.i.minor-faults
6581 -5.4% 6226 perf-stat.i.page-faults
0.82 +7.2% 0.88 perf-stat.overall.cpi
177.25 +5.8% 187.47 perf-stat.overall.cycles-between-cache-misses
1.22 -6.7% 1.14 perf-stat.overall.ipc
4.936e+09 -8.6% 4.513e+09 perf-stat.ps.branch-instructions
71615773 -6.5% 66940324 perf-stat.ps.cache-misses
79293323 -7.0% 73705360 perf-stat.ps.cache-references
7207 -2.9% 6998 perf-stat.ps.context-switches
1.269e+10 -1.1% 1.255e+10 perf-stat.ps.cpu-cycles
96.25 ± 10% -22.6% 74.50 ± 2% perf-stat.ps.cpu-migrations
3.346e+09 -6.7% 3.12e+09 perf-stat.ps.dTLB-loads
1.416e+09 -6.9% 1.318e+09 perf-stat.ps.dTLB-stores
1.554e+10 -7.8% 1.433e+10 perf-stat.ps.instructions
6565 -5.4% 6209 perf-stat.ps.minor-faults
6565 -5.4% 6209 perf-stat.ps.page-faults
4.691e+12 -7.6% 4.333e+12 perf-stat.total.instructions
67.81 -3.9 63.88 perf-profile.calltrace.cycles-pp.do_rw_once
0.89 ± 8% -0.3 0.54 ± 57% perf-profile.calltrace.cycles-pp.smp_apic_timer_interrupt.apic_timer_interrupt.do_rw_once
0.92 ± 8% -0.2 0.69 ± 15% perf-profile.calltrace.cycles-pp.apic_timer_interrupt.do_rw_once
45.88 +3.6 49.44 perf-profile.calltrace.cycles-pp.do_access
14.92 ± 4% +6.1 20.99 ± 4% perf-profile.calltrace.cycles-pp.clear_page_erms.clear_subpage.clear_huge_page.do_huge_pmd_anonymous_page.__handle_mm_fault
15.42 ± 3% +6.3 21.76 ± 4% perf-profile.calltrace.cycles-pp.clear_subpage.clear_huge_page.do_huge_pmd_anonymous_page.__handle_mm_fault.handle_mm_fault
15.92 ± 3% +6.6 22.52 ± 4% perf-profile.calltrace.cycles-pp.clear_huge_page.do_huge_pmd_anonymous_page.__handle_mm_fault.handle_mm_fault.__do_page_fault
17.18 ± 3% +6.6 23.79 ± 4% perf-profile.calltrace.cycles-pp.__handle_mm_fault.handle_mm_fault.__do_page_fault.do_page_fault.page_fault
17.00 ± 3% +6.7 23.68 ± 4% perf-profile.calltrace.cycles-pp.do_huge_pmd_anonymous_page.__handle_mm_fault.handle_mm_fault.__do_page_fault.do_page_fault
16.45 +7.0 23.43 perf-profile.calltrace.cycles-pp.page_fault.do_access
16.29 +7.0 23.27 perf-profile.calltrace.cycles-pp.handle_mm_fault.__do_page_fault.do_page_fault.page_fault.do_access
16.39 +7.0 23.38 perf-profile.calltrace.cycles-pp.__do_page_fault.do_page_fault.page_fault.do_access
16.43 +7.0 23.42 perf-profile.calltrace.cycles-pp.do_page_fault.page_fault.do_access
68.56 -4.7 63.88 perf-profile.children.cycles-pp.do_rw_once
1.62 ± 4% -0.3 1.31 ± 13% perf-profile.children.cycles-pp.smp_apic_timer_interrupt
1.73 ± 4% -0.3 1.42 ± 12% perf-profile.children.cycles-pp.apic_timer_interrupt
1.15 ± 6% -0.2 0.90 ± 13% perf-profile.children.cycles-pp.__hrtimer_run_queues
0.83 ± 3% -0.2 0.63 ± 17% perf-profile.children.cycles-pp.tick_sched_timer
0.66 ± 12% -0.2 0.51 ± 18% perf-profile.children.cycles-pp.update_process_times
0.24 ± 32% -0.1 0.11 ± 15% perf-profile.children.cycles-pp.irq_work_run_list
0.19 ± 21% -0.1 0.09 ± 21% perf-profile.children.cycles-pp.irq_work_interrupt
0.19 ± 21% -0.1 0.09 ± 21% perf-profile.children.cycles-pp.smp_irq_work_interrupt
0.18 ± 22% -0.1 0.09 ± 21% perf-profile.children.cycles-pp.irq_work_run
0.18 ± 22% -0.1 0.09 ± 21% perf-profile.children.cycles-pp.printk
0.10 ± 14% -0.0 0.07 ± 25% perf-profile.children.cycles-pp.try_to_wake_up
0.26 ± 13% +0.0 0.31 ± 4% perf-profile.children.cycles-pp.__free_pages_ok
0.34 ± 8% +0.1 0.41 ± 2% perf-profile.children.cycles-pp.__x64_sys_munmap
0.34 ± 8% +0.1 0.41 ± 3% perf-profile.children.cycles-pp.__vm_munmap
0.32 ± 11% +0.1 0.39 ± 2% perf-profile.children.cycles-pp.tlb_finish_mmu
0.32 ± 11% +0.1 0.39 ± 2% perf-profile.children.cycles-pp.tlb_flush_mmu
0.33 ± 12% +0.1 0.40 ± 3% perf-profile.children.cycles-pp.release_pages
0.34 ± 8% +0.1 0.42 ± 4% perf-profile.children.cycles-pp.__do_munmap
0.34 ± 8% +0.1 0.41 ± 3% perf-profile.children.cycles-pp.unmap_region
0.28 ± 9% +0.1 0.37 ± 5% perf-profile.children.cycles-pp.munmap
0.18 ± 8% +0.1 0.29 ± 9% perf-profile.children.cycles-pp._cond_resched
0.08 ± 26% +0.1 0.19 ± 12% perf-profile.children.cycles-pp._raw_spin_lock_irqsave
0.12 ± 15% +0.1 0.24 ± 13% perf-profile.children.cycles-pp.rcu_all_qs
0.30 ± 12% +0.1 0.43 ± 5% perf-profile.children.cycles-pp.___might_sleep
0.00 +0.1 0.15 ± 7% perf-profile.children.cycles-pp.native_queued_spin_lock_slowpath
45.22 +4.3 49.49 perf-profile.children.cycles-pp.do_access
15.19 ± 3% +6.4 21.58 ± 3% perf-profile.children.cycles-pp.clear_page_erms
15.47 ± 3% +6.6 22.03 ± 3% perf-profile.children.cycles-pp.clear_subpage
17.56 ± 3% +6.8 24.35 ± 3% perf-profile.children.cycles-pp.page_fault
15.98 ± 3% +6.8 22.78 ± 3% perf-profile.children.cycles-pp.clear_huge_page
17.35 ± 3% +6.8 24.15 ± 3% perf-profile.children.cycles-pp.handle_mm_fault
17.30 ± 3% +6.8 24.10 ± 3% perf-profile.children.cycles-pp.__handle_mm_fault
17.51 ± 3% +6.8 24.32 ± 3% perf-profile.children.cycles-pp.do_page_fault
17.47 ± 3% +6.8 24.29 ± 3% perf-profile.children.cycles-pp.__do_page_fault
17.02 ± 2% +6.9 23.91 ± 3% perf-profile.children.cycles-pp.do_huge_pmd_anonymous_page
59.31 -4.4 54.88 perf-profile.self.cycles-pp.do_rw_once
19.43 ± 2% -1.9 17.50 perf-profile.self.cycles-pp.do_access
0.23 ± 12% +0.1 0.29 ± 7% perf-profile.self.cycles-pp.__free_pages_ok
0.29 ± 10% +0.1 0.40 ± 7% perf-profile.self.cycles-pp.___might_sleep
0.07 ± 7% +0.1 0.18 ± 11% perf-profile.self.cycles-pp.rcu_all_qs
0.00 +0.1 0.15 ± 7% perf-profile.self.cycles-pp.native_queued_spin_lock_slowpath
0.31 ± 19% +0.2 0.51 ± 13% perf-profile.self.cycles-pp.clear_subpage
14.82 ± 3% +6.4 21.21 ± 3% perf-profile.self.cycles-pp.clear_page_erms
vm-scalability.time.user_time
940 +-+-------------------------------------------------------------------+
| + |
930 +-+ + + +. .. + + + |
920 +-++. .. + .+ .. + + + +..+.+.. + : + :|
|.. +..+.+ +. + .+.+ +..+. .+. + +. + : + :|
910 +-+ +. +. + + + |
| |
900 +-+ |
| |
890 +-+ |
880 +-+ |
O |
870 +-+ O O O O O O O O O O O |
| O O O O O O O O O |
860 +-+----------O-----------O-------------------O---------O--------------+
vm-scalability.time.system_time
290 +-+-------------------------------------------------------------------+
| O |
280 +-+O O O O O O O O O |
270 O-+ O O O O O O O O O O O O O O |
| |
260 +-+ |
| |
250 +-+ |
| |
240 +-+ +.. + .+ |
230 +-+ +..+. +..+.+.. +.. + + + .+..+ + +.. :|
| + +.. .+.. + + + + + .+.. .+..+ + + :|
220 +-++ + + + + + + + |
| |
210 +-+-------------------------------------------------------------------+
vm-scalability.throughput
5e+06 +-+--------------------------------------------------------------+
| |
4.95e+06 +-+ .+. .+.+.+.. .+..+. .+. .+.+..+. .+.|
| +. +.+. +.+ +.+. + +.+..+. .+..+.+.+. |
4.9e+06 +-+ + |
4.85e+06 +-+ |
| |
4.8e+06 +-+ |
| |
4.75e+06 +-+ |
4.7e+06 +-+ |
| |
4.65e+06 +-+ |
| O O O O O O |
4.6e+06 O-O----O----O-O-O--O-O-O------O--O-----O--O-O-O--O-O-O--O--------+
vm-scalability.median
1.25e+06 +-+--------------------------------------------------------------+
1.24e+06 +-+ .+. +. .+.. .+. .+. |
| +. +. .. + +.+.+..+.+.+. + +..+.+.+..+. .+.+..+.|
1.23e+06 +-+ + +.+..+ |
1.22e+06 +-+ |
| |
1.21e+06 +-+ |
1.2e+06 +-+ |
1.19e+06 +-+ |
| |
1.18e+06 +-+ |
1.17e+06 +-+ |
| |
1.16e+06 O-+ O O O O O O O |
1.15e+06 +-O----O----O-O----O-O-O------O--O-----O--O-O-O--O-O-O--O--------+
vm-scalability.workload
1.46e+09 +-+--------------------------------------------------------------+
| |
1.44e+09 +-+ .+. +. .+.. .+. .+. .+. .+. |
| +. +. .. + +.+.+. +.+. + +. +.+..+.+.+..+.+.+..+.|
1.42e+09 +-+ + |
| |
1.4e+09 +-+ |
| |
1.38e+09 +-+ |
| |
1.36e+09 +-+ |
| |
1.34e+09 O-+ O O |
| O O O O O O O O O O O O O O O O O O O O O |
1.32e+09 +-+---------O----------------------------------------------------+
[*] 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-5.3.0-rc6-00606-ga449d926203c7" of type "text/plain" (199452 bytes)
View attachment "job-script" of type "text/plain" (7707 bytes)
View attachment "job.yaml" of type "text/plain" (5263 bytes)
View attachment "reproduce" of type "text/plain" (18052 bytes)
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