linux-kernel - Re: [PATCH 2/2] sched/fair: Adjust the allowed NUMA imbalance when SD

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Message-ID: <CAE4VaGDZ1Tf5UuDz+nB5OhAD70395-sXZgMNa2G69BJs2fafEg@mail.gmail.com>
Date:   Fri, 11 Feb 2022 20:02:00 +0100
From:   Jirka Hladky <jhladky@...hat.com>
To:     Mel Gorman <mgorman@...hsingularity.net>
Cc:     K Prateek Nayak <kprateek.nayak@....com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...nel.org>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Valentin Schneider <valentin.schneider@....com>,
        Aubrey Li <aubrey.li@...ux.intel.com>,
        Barry Song <song.bao.hua@...ilicon.com>,
        Mike Galbraith <efault@....de>,
        Srikar Dronamraju <srikar@...ux.vnet.ibm.com>,
        Gautham Shenoy <gautham.shenoy@....com>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/2] sched/fair: Adjust the allowed NUMA imbalance when
 SD_NUMA spans multiple LLCs

Hi Mel,

we have tested 5.17.0_rc2 + v6 of your patch series and the results
are very good!

We see performance gains up to 25% for the hackbench (32 processes).
Even more importantly, we don't see any performance losses that we
have experienced with the previous versions of the patch series for
NAS and SPECjbb2005 workloads.

Tested-by: Jirka Hladky <jhladky@...hat.com>

Thanks a lot
Jirka


On Wed, Feb 9, 2022 at 12:08 PM Mel Gorman <mgorman@...hsingularity.net> wrote:
>
> On Wed, Feb 09, 2022 at 10:40:15AM +0530, K Prateek Nayak wrote:
> > There is a significant improvement throughout the board
> > with v6 outperforming tip/sched/core in every case!
> >
> > Tested-by: K Prateek Nayak <kprateek.nayak@....com>
> >
>
> Thanks very much Prateek and Gautham for reviewing and testing!
>
> --
> Mel Gorman
> SUSE Labs
>


-- 
-Jirka