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SubjectRe: [sched/fair] ddb3b1126f: hackbench.throughput -25.9% regression
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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
>

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