linux-kernel - [perf/x86/intel] f83d2f91d2: stress-ng.sigpending.ops_per

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [day] [month] [year] [list]
Message-ID: <20210514054239.GB31698@xsang-OptiPlex-9020>
Date:   Fri, 14 May 2021 13:42:39 +0800
From:   kernel test robot <oliver.sang@...el.com>
To:     Kan Liang <kan.liang@...ux.intel.com>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Andi Kleen <ak@...ux.intel.com>,
        LKML <linux-kernel@...r.kernel.org>, x86@...nel.org,
        lkp@...ts.01.org, lkp@...el.com, ying.huang@...el.com,
        feng.tang@...el.com, zhengjun.xing@...el.com
Subject: [perf/x86/intel]  f83d2f91d2:  stress-ng.sigpending.ops_per_sec
 -4.0% regression



Greeting,

FYI, we noticed a -4.0% regression of stress-ng.sigpending.ops_per_sec due to commit:


commit: f83d2f91d2590318e083d05bd7b1beda2489050e ("perf/x86/intel: Add Alder Lake Hybrid support")
https://git.kernel.org/cgit/linux/kernel/git/tip/tip.git perf/core


in testcase: stress-ng
on test machine: 96 threads Intel(R) Xeon(R) Gold 6252 CPU @ 2.10GHz with 192G memory
with following parameters:

	nr_threads: 10%
	disk: 1HDD
	testtime: 60s
	fs: ext4
	class: os
	test: sigpending
	cpufreq_governor: performance
	ucode: 0x5003006




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

=========================================================================================
class/compiler/cpufreq_governor/disk/fs/kconfig/nr_threads/rootfs/tbox_group/test/testcase/testtime/ucode:
  os/gcc-9/performance/1HDD/ext4/x86_64-rhel-8.3/10%/debian-10.4-x86_64-20200603.cgz/lkp-csl-2sp5/sigpending/stress-ng/60s/0x5003006

commit: 
  3e9a8b219e ("perf/x86: Support filter_match callback")
  f83d2f91d2 ("perf/x86/intel: Add Alder Lake Hybrid support")

3e9a8b219e4cc897 f83d2f91d2590318e083d05bd7b 
---------------- --------------------------- 
       fail:runs  %reproduction    fail:runs
           |             |             |    
           :14           7%           1:14    kmsg.Spurious_LAPIC_timer_interrupt_on_cpu
         %stddev     %change         %stddev
             \          |                \  
   4036204 ± 10%      -4.0%    3873163 ±  6%  stress-ng.sigpending.ops_per_sec
    446.47 ±  9%      +4.2%     465.36        stress-ng.time.system_time


                                                                                
                           stress-ng.sigpending.ops_per_sec                     
                                                                                
    4e+06 +-----------------------------------------------------------------+   
          |.++.+.++.     +.   +.+.++.   +.   .++.+.++.+.         .+.++.+.+  |   
  3.8e+06 |-+       +.+.+  +.+       +.+  +.+           ++.+.++.+         :+|   
  3.6e+06 |-+                OO O OO O OO O O OO O OO O OO O OO O         + |   
          | OO O OO O   OO O                                                |   
  3.4e+06 |-+                                                               |   
  3.2e+06 |-+                                                               |   
          |                                                                 |   
    3e+06 |-+                                                               |   
  2.8e+06 |-+                                                               |   
          |                                                                 |   
  2.6e+06 |-+                                                               |   
  2.4e+06 |-+                                                               |   
          |           O                                                     |   
  2.2e+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-rc3-00045-gf83d2f91d259" of type "text/plain" (172883 bytes)

View attachment "job-script" of type "text/plain" (8364 bytes)

View attachment "job.yaml" of type "text/plain" (5861 bytes)

View attachment "reproduce" of type "text/plain" (538 bytes)