linux-kernel - Re: [PATCH v6 0/2] sched/fair: Wake short task on current CPU

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Date:   Tue, 14 Mar 2023 12:09:37 +0800
From:   Chen Yu <yu.c.chen@...el.com>
To:     K Prateek Nayak <kprateek.nayak@....com>
CC:     Peter Zijlstra <peterz@...radead.org>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Ingo Molnar <mingo@...hat.com>,
        Juri Lelli <juri.lelli@...hat.com>,
        Mel Gorman <mgorman@...hsingularity.net>,
        Tim Chen <tim.c.chen@...el.com>,
        Dietmar Eggemann <dietmar.eggemann@....com>,
        "Steven Rostedt" <rostedt@...dmis.org>,
        Ben Segall <bsegall@...gle.com>,
        Abel Wu <wuyun.abel@...edance.com>,
        Yicong Yang <yangyicong@...ilicon.com>,
        "Gautham R . Shenoy" <gautham.shenoy@....com>,
        Honglei Wang <wanghonglei@...ichuxing.com>,
        Len Brown <len.brown@...el.com>,
        Chen Yu <yu.chen.surf@...il.com>,
        Tianchen Ding <dtcccc@...ux.alibaba.com>,
        "Joel Fernandes" <joel@...lfernandes.org>,
        Josh Don <joshdon@...gle.com>,
        "Hillf Danton" <hdanton@...a.com>,
        kernel test robot <yujie.liu@...el.com>,
        "Arjan Van De Ven" <arjan.van.de.ven@...el.com>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v6 0/2] sched/fair: Wake short task on current CPU

On 2023-03-14 at 08:43:17 +0530, K Prateek Nayak wrote:
> Hello Chenyu,
> 
> I did not observe any regression when testing v6 :)
> Most of the benchmark results are comparable to the tip with minor
> gains in some benchmarks with single sender and single receiver.
> 
> With the introduction of wakee_flips condition in is_short_task(),
> most benchmarks that have multiple tasks interacting are now
> comparable to tip. There may be other avenues for optimization
> using SIS_SHORT as Abel pointed but this series is a good start in
> that direction. 
> 
> Tested-by: K Prateek Nayak <kprateek.nayak@....com>
Thanks Prateek!

thanks,
Chenyu