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Date: Tue, 27 Apr 2021 17:00:13 +0800
From: kernel test robot <oliver.sang@...el.com>
To: Barry Song <song.bao.hua@...ilicon.com>
Cc: Ingo Molnar <mingo@...nel.org>,
Thomas Gleixner <tglx@...utronix.de>,
LKML <linux-kernel@...r.kernel.org>, lkp@...ts.01.org,
lkp@...el.com, ying.huang@...el.com, feng.tang@...el.com,
zhengjun.xing@...el.com
Subject: [genirq] cbe16f35be: will-it-scale.per_thread_ops -5.2% regression
Greeting,
FYI, we noticed a -5.2% regression of will-it-scale.per_thread_ops due to commit:
commit: cbe16f35bee6880becca6f20d2ebf6b457148552 ("genirq: Add IRQF_NO_AUTOEN for request_irq/nmi()")
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
in testcase: will-it-scale
on test machine: 88 threads Intel(R) Xeon(R) Gold 6238M CPU @ 2.10GHz with 128G memory
with following parameters:
nr_task: 100%
mode: thread
test: getppid1
cpufreq_governor: performance
ucode: 0x5003006
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
bin/lkp run compatible-job.yaml
=========================================================================================
compiler/cpufreq_governor/kconfig/mode/nr_task/rootfs/tbox_group/test/testcase/ucode:
gcc-9/performance/x86_64-rhel-8.3/thread/100%/debian-10.4-x86_64-20200603.cgz/lkp-csl-2sp9/getppid1/will-it-scale/0x5003006
commit:
v5.12-rc2
cbe16f35be ("genirq: Add IRQF_NO_AUTOEN for request_irq/nmi()")
v5.12-rc2 cbe16f35bee6880becca6f20d2e
---------------- ---------------------------
%stddev %change %stddev
\ | \
7.408e+08 -5.2% 7.021e+08 will-it-scale.88.threads
8417726 -5.2% 7978644 will-it-scale.per_thread_ops
7.408e+08 -5.2% 7.021e+08 will-it-scale.workload
3.851e+10 -5.2% 3.65e+10 perf-stat.i.branch-instructions
1.839e+08 -4.2% 1.763e+08 perf-stat.i.branch-misses
1.39 +5.3% 1.46 perf-stat.i.cpi
5.988e+10 -5.2% 5.674e+10 perf-stat.i.dTLB-loads
4.139e+10 -5.2% 3.922e+10 perf-stat.i.dTLB-stores
2.239e+08 ± 3% -14.6% 1.913e+08 ± 4% perf-stat.i.iTLB-load-misses
1.741e+11 -5.2% 1.65e+11 perf-stat.i.instructions
794.20 ± 2% +10.7% 879.14 ± 4% perf-stat.i.instructions-per-iTLB-miss
0.72 -5.0% 0.68 perf-stat.i.ipc
1588 -5.2% 1505 perf-stat.i.metric.M/sec
1.39 +5.4% 1.47 perf-stat.overall.cpi
0.00 +0.0 0.00 perf-stat.overall.dTLB-store-miss-rate%
778.31 ± 3% +11.1% 864.35 ± 4% perf-stat.overall.instructions-per-iTLB-miss
0.72 -5.1% 0.68 perf-stat.overall.ipc
3.838e+10 -5.2% 3.638e+10 perf-stat.ps.branch-instructions
1.833e+08 -4.2% 1.757e+08 perf-stat.ps.branch-misses
5.968e+10 -5.2% 5.655e+10 perf-stat.ps.dTLB-loads
4.125e+10 -5.2% 3.909e+10 perf-stat.ps.dTLB-stores
2.231e+08 ± 3% -14.6% 1.907e+08 ± 4% perf-stat.ps.iTLB-load-misses
1.735e+11 -5.2% 1.645e+11 perf-stat.ps.instructions
5.243e+13 -5.2% 4.971e+13 perf-stat.total.instructions
43.20 -2.3 40.87 perf-profile.calltrace.cycles-pp.__entry_text_start.getppid
9.09 -0.4 8.65 ± 2% perf-profile.calltrace.cycles-pp.testcase
8.01 -0.3 7.66 perf-profile.calltrace.cycles-pp.syscall_return_via_sysret.getppid
2.93 -0.2 2.73 perf-profile.calltrace.cycles-pp.syscall_enter_from_user_mode.do_syscall_64.entry_SYSCALL_64_after_hwframe.getppid
3.02 -0.2 2.83 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_safe_stack.getppid
2.52 ± 3% +0.7 3.23 ± 9% perf-profile.calltrace.cycles-pp.syscall_exit_to_user_mode_prepare.syscall_exit_to_user_mode.entry_SYSCALL_64_after_hwframe.getppid
18.24 +1.1 19.29 perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.getppid
13.33 +1.1 14.46 ± 2% perf-profile.calltrace.cycles-pp.__x64_sys_getppid.do_syscall_64.entry_SYSCALL_64_after_hwframe.getppid
1.94 ± 2% +1.7 3.62 ± 3% perf-profile.calltrace.cycles-pp.rcu_nocb_flush_deferred_wakeup.exit_to_user_mode_prepare.syscall_exit_to_user_mode.entry_SYSCALL_64_after_hwframe.getppid
7.47 ± 2% +1.8 9.25 perf-profile.calltrace.cycles-pp.exit_to_user_mode_prepare.syscall_exit_to_user_mode.entry_SYSCALL_64_after_hwframe.getppid
11.51 ± 2% +2.3 13.81 ± 2% perf-profile.calltrace.cycles-pp.syscall_exit_to_user_mode.entry_SYSCALL_64_after_hwframe.getppid
39.05 +3.1 42.17 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe.getppid
27.84 -1.5 26.36 perf-profile.children.cycles-pp.__entry_text_start
23.40 -1.2 22.22 perf-profile.children.cycles-pp.syscall_return_via_sysret
2.97 -0.2 2.76 perf-profile.children.cycles-pp.syscall_enter_from_user_mode
3.23 -0.2 3.03 perf-profile.children.cycles-pp.entry_SYSCALL_64_safe_stack
0.41 ± 2% -0.0 0.37 ± 2% perf-profile.children.cycles-pp.__x86_indirect_thunk_rax
2.56 ± 3% +0.7 3.25 ± 7% perf-profile.children.cycles-pp.syscall_exit_to_user_mode_prepare
13.88 +1.2 15.05 ± 2% perf-profile.children.cycles-pp.__x64_sys_getppid
2.02 ± 2% +1.6 3.67 ± 3% perf-profile.children.cycles-pp.rcu_nocb_flush_deferred_wakeup
7.86 +1.7 9.60 perf-profile.children.cycles-pp.exit_to_user_mode_prepare
12.71 +2.3 15.04 ± 2% perf-profile.children.cycles-pp.syscall_exit_to_user_mode
39.65 +3.1 42.77 perf-profile.children.cycles-pp.entry_SYSCALL_64_after_hwframe
23.19 -1.2 22.01 perf-profile.self.cycles-pp.syscall_return_via_sysret
19.57 -1.1 18.50 perf-profile.self.cycles-pp.getppid
12.47 -0.6 11.83 perf-profile.self.cycles-pp.__entry_text_start
8.60 -0.2 8.36 perf-profile.self.cycles-pp.entry_SYSCALL_64_after_hwframe
3.22 -0.2 3.02 perf-profile.self.cycles-pp.entry_SYSCALL_64_safe_stack
2.52 -0.2 2.35 perf-profile.self.cycles-pp.syscall_enter_from_user_mode
3.58 +0.4 3.95 perf-profile.self.cycles-pp.__x64_sys_getppid
2.12 ± 3% +0.6 2.74 ± 8% perf-profile.self.cycles-pp.syscall_exit_to_user_mode_prepare
1.72 ± 2% +1.7 3.41 ± 3% perf-profile.self.cycles-pp.rcu_nocb_flush_deferred_wakeup
will-it-scale.per_thread_ops
8.8e+06 +-----------------------------------------------------------------+
8.7e+06 |-+ .+. |
| .+ + |
8.6e+06 |.+.+.+.+ + .+. .+.+. .+.+. .+.+.+.+. |
8.5e+06 |-+ ++ + + + +. |
| +.+.++.+.+.+.+.+.+.+.|
8.4e+06 |-+ |
8.3e+06 |-O O O O O O OO |
8.2e+06 |-+ O O |
| |
8.1e+06 |-+ |
8e+06 |-+ O O O O O O O O O O O O O O |
| O O O O |
7.9e+06 |-+ O O O |
7.8e+06 +-----------------------------------------------------------------+
[*] 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-5.12.0-rc2-00001-gcbe16f35bee6" of type "text/plain" (172883 bytes)
View attachment "job-script" of type "text/plain" (7760 bytes)
View attachment "job.yaml" of type "text/plain" (5344 bytes)
View attachment "reproduce" of type "text/plain" (339 bytes)
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