From: Tim Chen <tim.c.chen@linux.intel.com>
To: kernel test robot <oliver.sang@intel.com>
Cc: 0day robot <lkp@intel.com>, Chen Yu <yu.c.chen@intel.com>,
Walter Mack <walter.mack@intel.com>,
LKML <linux-kernel@vger.kernel.org>,
lkp@lists.01.org, ying.huang@intel.com, feng.tang@intel.com,
zhengjun.xing@linux.intel.com, fengwei.yin@intel.com,
Peter Zijlstra <peterz@infradead.org>,
Vincent Guittot <vincent.guittot@linaro.org>,
Ingo Molnar <mingo@elte.hu>, Juri Lelli <juri.lelli@redhat.com>,
Mel Gorman <mgorman@suse.de>,
aubrey.li@linux.intel.com
Subject: Re: [sched/fair] ddb3b1126f: hackbench.throughput -25.9% regression
Date: Wed, 30 Mar 2022 16:48:05 -0700 [thread overview]
Message-ID: <7aa67fedb4b6dc9126bc59ee993fa18d0e472475.camel@linux.intel.com> (raw)
In-Reply-To: <20220330094632.GB6999@xsang-OptiPlex-9020>
On Wed, 2022-03-30 at 17:46 +0800, kernel test robot wrote:
>
> Greeting,
>
> FYI, we noticed a -25.9% regression of hackbench.throughput due to commit:
>
Will try to check the regression seen.
Thanks.
Tim
>
>
> commit:
> d9ad181b93 ("sched/fair: Don't rely on ->exec_start for migration")
> ddb3b1126f ("sched/fair: Simple runqueue order on migrate")
>
> d9ad181b93f83b36 ddb3b1126fe93e8d6e059600488
> ---------------- ---------------------------
> %stddev %change %stddev
> \ | \
> 92566 -25.9% 68598 ± 2% hackbench.throughput
> 85.50 +40.8% 120.35 ± 2% hackbench.time.elapsed_time
> 85.50 +40.8% 120.35 ± 2% hackbench.time.elapsed_time.max
> 9674391 ± 2% +466.2% 54780205 ± 2% hackbench.time.involuntary_context_switches
> 1240 +42.6% 1768 ± 3% hackbench.time.system_time
> 89.58 +20.4% 107.85 hackbench.time.user_time
> 36626407 +270.2% 1.356e+08 ± 2% hackbench.time.voluntary_context_switches
> 2500490 ± 3% +78.2% 4456808 ± 3% cpuidle..usage
> 118.45 ± 2% +29.2% 153.02 ± 2% uptime.boot
>
next prev parent reply other threads:[~2022-03-30 23:48 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-25 22:54 [PATCH 0/2] sched/fair: Fix starvation caused by task migration Tim Chen
2022-03-25 22:54 ` [PATCH 1/2] sched/fair: Don't rely on ->exec_start for migration Tim Chen
2022-03-25 22:54 ` [PATCH 2/2] sched/fair: Simple runqueue order on migrate Tim Chen
2022-03-29 9:03 ` Vincent Guittot
2022-03-31 11:47 ` Peter Zijlstra
2022-03-31 12:15 ` Vincent Guittot
2022-03-29 10:09 ` Abel Wu
2022-03-29 14:26 ` Tim Chen
2022-03-30 9:46 ` [sched/fair] ddb3b1126f: hackbench.throughput -25.9% regression kernel test robot
2022-03-30 23:48 ` Tim Chen [this message]
2022-04-01 18:04 ` Chen Yu
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