linux-kernel - Re: [RFC PATCH v3 00/16] Core scheduling v3

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Date:   Fri, 13 Sep 2019 07:12:52 +0800
From:   Aubrey Li <aubrey.intel@...il.com>
To:     Aaron Lu <aaron.lu@...ux.alibaba.com>
Cc:     Tim Chen <tim.c.chen@...ux.intel.com>,
        Julien Desfossez <jdesfossez@...italocean.com>,
        Dario Faggioli <dfaggioli@...e.com>,
        "Li, Aubrey" <aubrey.li@...ux.intel.com>,
        Subhra Mazumdar <subhra.mazumdar@...cle.com>,
        Vineeth Remanan Pillai <vpillai@...italocean.com>,
        Nishanth Aravamudan <naravamudan@...italocean.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Paul Turner <pjt@...gle.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Linux List Kernel Mailing <linux-kernel@...r.kernel.org>,
        Frédéric Weisbecker <fweisbec@...il.com>,
        Kees Cook <keescook@...omium.org>,
        Greg Kerr <kerrnel@...gle.com>, Phil Auld <pauld@...hat.com>,
        Valentin Schneider <valentin.schneider@....com>,
        Mel Gorman <mgorman@...hsingularity.net>,
        Pawan Gupta <pawan.kumar.gupta@...ux.intel.com>,
        Paolo Bonzini <pbonzini@...hat.com>
Subject: Re: [RFC PATCH v3 00/16] Core scheduling v3

On Thu, Sep 12, 2019 at 8:04 PM Aaron Lu <aaron.lu@...ux.alibaba.com> wrote:
>
> On Wed, Sep 11, 2019 at 09:19:02AM -0700, Tim Chen wrote:
> > On 9/11/19 7:02 AM, Aaron Lu wrote:
> > I think Julien's result show that my patches did not do as well as
> > your patches for fairness. Aubrey did some other testing with the same
> > conclusion.  So I think keeping the forced idle time balanced is not
> > enough for maintaining fairness.
>
> Well, I have done following tests:
> 1 Julien's test script: https://paste.debian.net/plainh/834cf45c
> 2 start two tagged will-it-scale/page_fault1, see how each performs;
> 3 Aubrey's mysql test: https://github.com/aubreyli/coresched_bench.git
>
> They all show your patchset performs equally well...And consider what
> the patch does, I think they are really doing the same thing in
> different ways.

It looks like we are not on the same page, if you don't mind, can both of
you rebase your patchset onto v5.3-rc8 and provide a public branch so I
can fetch and test it at least by my benchmark?

Thanks,
-Aubrey