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Date: Sun, 5 Sep 2021 21:27:32 +0800
From: kernel test robot <oliver.sang@...el.com>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: 0day robot <lkp@...el.com>, Shakeel Butt <shakeelb@...gle.com>,
Alexander Viro <viro@...iv.linux.org.uk>,
Alexey Dobriyan <adobriyan@...il.com>,
Andrei Vagin <avagin@...il.com>,
Borislav Petkov <bp@...en8.de>, Borislav Petkov <bp@...e.de>,
Christian Brauner <christian.brauner@...ntu.com>,
Dmitry Safonov <0x7f454c46@...il.com>,
"Eric W. Biederman" <ebiederm@...ssion.com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
"H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...hat.com>,
"J. Bruce Fields" <bfields@...ldses.org>,
Jeff Layton <jlayton@...nel.org>, Jens Axboe <axboe@...nel.dk>,
Jiri Slaby <jirislaby@...nel.org>,
Johannes Weiner <hannes@...xchg.org>,
Kirill Tkhai <ktkhai@...tuozzo.com>,
Michal Hocko <mhocko@...nel.org>,
Oleg Nesterov <oleg@...hat.com>, Roman Gushchin <guro@...com>,
Serge Hallyn <serge@...lyn.com>, Tejun Heo <tj@...nel.org>,
Thomas Gleixner <tglx@...utronix.de>,
Vladimir Davydov <vdavydov.dev@...il.com>,
Yutian Yang <nglaive@...il.com>,
Zefan Li <lizefan.x@...edance.com>,
Andrew Morton <akpm@...ux-foundation.org>,
LKML <linux-kernel@...r.kernel.org>, lkp@...ts.01.org,
ying.huang@...el.com, feng.tang@...el.com,
zhengjun.xing@...ux.intel.com, linux-mm@...ck.org,
mm-commits@...r.kernel.org, torvalds@...ux-foundation.org,
vvs@...tuozzo.com
Subject: [memcg] fa4e6b1ad5: will-it-scale.per_thread_ops -15.4% regression
Greeting,
FYI, we noticed a -15.4% regression of will-it-scale.per_thread_ops due to commit:
commit: fa4e6b1ad57df096ddcf091fece3d9babfe90048 ("[patch 100/212] memcg: enable accounting for pollfd and select bits arrays")
url: https://github.com/0day-ci/linux/commits/Andrew-Morton/ia64-fix-typo-in-a-comment/20210903-065028
in testcase: will-it-scale
on test machine: 144 threads 4 sockets Intel(R) Xeon(R) CPU E7-8890 v3 @ 2.50GHz with 512G memory
with following parameters:
nr_task: 50%
mode: thread
test: poll2
cpufreq_governor: performance
ucode: 0x16
test-description: Will It Scale takes a testcase and runs it from 1 through to n parallel copies to see if the testcase will scale. It builds both a process and threads based test in order to see any differences between the two.
test-url: https://github.com/antonblanchard/will-it-scale
If you fix the issue, kindly add following tag
Reported-by: kernel test robot <oliver.sang@...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 split-job --compatible job.yaml # generate the yaml file for lkp run
bin/lkp run generated-yaml-file
=========================================================================================
compiler/cpufreq_governor/kconfig/mode/nr_task/rootfs/tbox_group/test/testcase/ucode:
gcc-9/performance/x86_64-rhel-8.3/thread/50%/debian-10.4-x86_64-20200603.cgz/lkp-hsw-4ex1/poll2/will-it-scale/0x16
commit:
ddae5955e0 ("memcg: enable accounting for mnt_cache entries")
fa4e6b1ad5 ("memcg: enable accounting for pollfd and select bits arrays")
ddae5955e09fc376 fa4e6b1ad57df096ddcf091fece
---------------- ---------------------------
%stddev %change %stddev
\ | \
20037899 -15.4% 16955694 ± 3% will-it-scale.72.threads
278303 -15.4% 235495 ± 3% will-it-scale.per_thread_ops
20037899 -15.4% 16955694 ± 3% will-it-scale.workload
1583653 ± 2% +47.6% 2338047 ± 8% cpuidle..usage
0.01 ± 2% +0.0 0.02 ± 8% mpstat.cpu.all.soft%
2568 ±188% +336.5% 11212 ± 44% numa-vmstat.node0.numa_other
76315 +3.5% 78953 vmstat.system.in
2953 ± 15% +39.4% 4118 ± 6% slabinfo.kmalloc-cg-1k.active_objs
2953 ± 15% +39.4% 4118 ± 6% slabinfo.kmalloc-cg-1k.num_objs
50719 ± 3% -21.6% 39775 ± 10% turbostat.C1E
1403174 +55.9% 2187482 ± 8% turbostat.C6
645.68 -2.6% 628.84 turbostat.PkgWatt
61545 ±178% +175.6% 169623 ± 78% interrupts.CPU110.LOC:Local_timer_interrupts
8916 ±147% +1620.7% 153419 ± 96% interrupts.CPU134.LOC:Local_timer_interrupts
108655 ±124% +105.1% 222831 ± 49% interrupts.CPU23.LOC:Local_timer_interrupts
611.50 ± 62% +65.4% 1011 ± 63% interrupts.CPU25.CAL:Function_call_interrupts
56545 ±189% +205.4% 172674 ± 74% interrupts.CPU25.LOC:Local_timer_interrupts
1652 ± 13% -48.5% 850.67 ± 63% interrupts.CPU52.CAL:Function_call_interrupts
346.83 +72.7% 598.83 ± 57% interrupts.CPU94.CAL:Function_call_interrupts
1279 ± 8% +83.7% 2350 ± 31% interrupts.RES:Rescheduling_interrupts
10413 ± 9% -15.1% 8842 ± 11% softirqs.CPU0.RCU
10111 ± 18% -34.4% 6636 ± 19% softirqs.CPU10.RCU
9749 ± 8% -35.8% 6263 ± 32% softirqs.CPU22.RCU
10009 ± 7% -59.3% 4069 ± 69% softirqs.CPU30.RCU
61.83 ± 38% +3560.9% 2263 ±210% softirqs.CPU74.TIMER
754991 ± 2% -23.4% 578181 ± 5% softirqs.RCU
727783 +16.3% 846764 ± 3% softirqs.SCHED
40315 +29.1% 52046 ± 4% softirqs.TIMER
5492 +14.7% 6298 ± 4% syscalls.sys_mmap.med
1.083e+08 ± 6% +1.3e+08 2.414e+08 ± 12% syscalls.sys_mmap.noise.100%
1.806e+08 ± 3% +1.3e+08 3.115e+08 ± 9% syscalls.sys_mmap.noise.2%
1.715e+08 ± 3% +1.3e+08 2.981e+08 ± 10% syscalls.sys_mmap.noise.25%
1.801e+08 ± 3% +1.3e+08 3.111e+08 ± 9% syscalls.sys_mmap.noise.5%
1.4e+08 ± 4% +1.3e+08 2.737e+08 ± 11% syscalls.sys_mmap.noise.50%
1.181e+08 ± 6% +1.4e+08 2.571e+08 ± 12% syscalls.sys_mmap.noise.75%
5921 +11.7% 6612 ± 3% syscalls.sys_openat.med
5133257 ± 10% +4.5e+08 4.563e+08 ± 38% syscalls.sys_poll.noise.100%
7282972 ± 31% +4.5e+08 4.599e+08 ± 37% syscalls.sys_poll.noise.2%
6705445 ± 30% +4.5e+08 4.593e+08 ± 37% syscalls.sys_poll.noise.25%
6828883 ± 32% +4.5e+08 4.596e+08 ± 37% syscalls.sys_poll.noise.5%
6600419 ± 29% +4.5e+08 4.592e+08 ± 37% syscalls.sys_poll.noise.50%
5686935 ± 13% +4.5e+08 4.585e+08 ± 37% syscalls.sys_poll.noise.75%
36152 ± 26% +56.4% 56553 ± 12% syscalls.sys_write.max
85796438 ± 15% +5.5e+07 1.407e+08 ± 20% syscalls.sys_write.noise.100%
1.024e+08 ± 14% +4.3e+07 1.451e+08 ± 19% syscalls.sys_write.noise.75%
will-it-scale.per_thread_ops
300000 +------------------------------------------------------------------+
| ++.+.+.+.++.+.+.+.+.++.+.+.+.++.+.+.+.++.+.+.+.+.++.+.+.+.++.+.|
250000 |-+ : O O O |
| O : OO O O O O O OO O O O OO |
| :O O O O O O O O O O O O |
200000 |:+: O O |
|: : O |
150000 |:+: |
|: : |
100000 |:+: |
|: : |
| : |
50000 |-: |
| : |
0 +------------------------------------------------------------------+
[*] 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.
---
0DAY/LKP+ Test Infrastructure Open Source Technology Center
https://lists.01.org/hyperkitty/list/lkp@lists.01.org Intel Corporation
Thanks,
Oliver Sang
View attachment "config-5.14.0-00100-gfa4e6b1ad57d" of type "text/plain" (175510 bytes)
View attachment "job-script" of type "text/plain" (8094 bytes)
View attachment "job.yaml" of type "text/plain" (5302 bytes)
View attachment "reproduce" of type "text/plain" (336 bytes)
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