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Date: Fri, 4 Jul 2014 11:54:55 +0800
From: Fengguang Wu <fengguang.wu@...el.com>
To: Jet Chen <jet.chen@...el.com>
Cc: Aaron Tomlin <atomlin@...hat.com>,
Dave Hansen <dave.hansen@...el.com>, LKP <lkp@...org>,
LKML <linux-kernel@...r.kernel.org>
Subject: Re: [kernel/watchdog.c] ed235875e2c: -14.2% will-it-scale.scalability
Hi all,
Sorry please ignore this report: it seems there are no obvious
relationship between the code change and the regression.
Thanks,
Fengguang
On Fri, Jul 04, 2014 at 11:45:31AM +0800, Jet Chen wrote:
> Hi Aaron,
>
> FYI, we noticed the below changes on
>
> commit ed235875e2ca983197831337a986f0517074e1a0 ("kernel/watchdog.c: print traces for all cpus on lockup detection")
>
> test case: lkp-snb01/will-it-scale/signal1
>
> f3aca3d09525f87 ed235875e2ca983197831337a
> --------------- -------------------------
> 0.12 ~ 0% -14.2% 0.10 ~ 0% TOTAL will-it-scale.scalability
> 506146 ~ 0% -4.4% 484004 ~ 0% TOTAL will-it-scale.per_process_ops
> 12193 ~ 4% +12.6% 13726 ~ 6% TOTAL slabinfo.kmalloc-256.active_objs
> 12921 ~ 4% +12.3% 14516 ~ 5% TOTAL slabinfo.kmalloc-256.num_objs
> 123094 ~ 3% -6.5% 115117 ~ 3% TOTAL meminfo.Committed_AS
>
> Legend:
> ~XX% - stddev percent
> [+-]XX% - change percent
>
>
> will-it-scale.per_process_ops
>
> 515000 ++-----------------------------------------------------------------+
> | .*.*.*.*. .* |
> 510000 *+* *.*.* + .*. *. |
> 505000 ++ * *.*.*.*. .* .*.*.*. .*.*.*. + *.*.*.*.*.*
> | * * * *.* |
> 500000 ++ |
> | |
> 495000 ++ |
> | |
> 490000 ++ |
> 485000 ++ O O O O O O |
> | O O O O O O O O O O |
> 480000 O+O O O O O |
> | |
> 475000 ++-----------------------------------------------------------------+
>
>
> [*] 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,
> Jet
>
> echo performance > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
> echo performance > /sys/devices/system/cpu/cpu1/cpufreq/scaling_governor
> echo performance > /sys/devices/system/cpu/cpu10/cpufreq/scaling_governor
> echo performance > /sys/devices/system/cpu/cpu11/cpufreq/scaling_governor
> echo performance > /sys/devices/system/cpu/cpu12/cpufreq/scaling_governor
> echo performance > /sys/devices/system/cpu/cpu13/cpufreq/scaling_governor
> echo performance > /sys/devices/system/cpu/cpu14/cpufreq/scaling_governor
> echo performance > /sys/devices/system/cpu/cpu15/cpufreq/scaling_governor
> echo performance > /sys/devices/system/cpu/cpu16/cpufreq/scaling_governor
> echo performance > /sys/devices/system/cpu/cpu17/cpufreq/scaling_governor
> echo performance > /sys/devices/system/cpu/cpu18/cpufreq/scaling_governor
> echo performance > /sys/devices/system/cpu/cpu19/cpufreq/scaling_governor
> echo performance > /sys/devices/system/cpu/cpu2/cpufreq/scaling_governor
> echo performance > /sys/devices/system/cpu/cpu20/cpufreq/scaling_governor
> echo performance > /sys/devices/system/cpu/cpu21/cpufreq/scaling_governor
> echo performance > /sys/devices/system/cpu/cpu22/cpufreq/scaling_governor
> echo performance > /sys/devices/system/cpu/cpu23/cpufreq/scaling_governor
> echo performance > /sys/devices/system/cpu/cpu24/cpufreq/scaling_governor
> echo performance > /sys/devices/system/cpu/cpu25/cpufreq/scaling_governor
> echo performance > /sys/devices/system/cpu/cpu26/cpufreq/scaling_governor
> echo performance > /sys/devices/system/cpu/cpu27/cpufreq/scaling_governor
> echo performance > /sys/devices/system/cpu/cpu28/cpufreq/scaling_governor
> echo performance > /sys/devices/system/cpu/cpu29/cpufreq/scaling_governor
> echo performance > /sys/devices/system/cpu/cpu3/cpufreq/scaling_governor
> echo performance > /sys/devices/system/cpu/cpu30/cpufreq/scaling_governor
> echo performance > /sys/devices/system/cpu/cpu31/cpufreq/scaling_governor
> echo performance > /sys/devices/system/cpu/cpu4/cpufreq/scaling_governor
> echo performance > /sys/devices/system/cpu/cpu5/cpufreq/scaling_governor
> echo performance > /sys/devices/system/cpu/cpu6/cpufreq/scaling_governor
> echo performance > /sys/devices/system/cpu/cpu7/cpufreq/scaling_governor
> echo performance > /sys/devices/system/cpu/cpu8/cpufreq/scaling_governor
> echo performance > /sys/devices/system/cpu/cpu9/cpufreq/scaling_governor
> ./runtest.py signal1 25 1 8 16 24 32
>
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