linux-kernel - Re: [PATCH 0/5] BT scheduling class

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Message-ID: <6a81a564-9d89-f01d-15b8-e07f092cc5f1@arm.com>
Date:   Fri, 21 Jun 2019 14:26:11 +0100
From:   Valentin Schneider <valentin.schneider@....com>
To:     Peter Zijlstra <peterz@...radead.org>, xiaoggchen@...cent.com
Cc:     jasperwang@...cent.com, heddchen@...cent.com, mingo@...hat.com,
        linux-kernel@...r.kernel.org, tj@...nel.org, lizefan@...wei.com,
        hannes@...xchg.org, cgroups@...r.kernel.org,
        viresh.kumar@...aro.org
Subject: Re: [PATCH 0/5] BT scheduling class

On 21/06/2019 14:03, Peter Zijlstra wrote:
> On Fri, Jun 21, 2019 at 03:45:52PM +0800, xiaoggchen@...cent.com wrote:
> 
>> First only server application exists in the system and the success
>> rate is 99.998% and the average cpu use is only 25%.
> 
> Have you guys looked at this series:
> 
>   https://lkml.kernel.org/r/cover.1556182964.git.viresh.kumar@linaro.org
> 
> 

Sort of a shot in the dark here, but I wonder if task stealing [1] could
help as well? IIRC Steve had some pretty good CPU utilization improvements
with his series.

FWIW I have a somewhat recent rebase of CFS stealing laying around at [2].

[1]: https://lore.kernel.org/lkml/1544131696-2888-1-git-send-email-steven.sistare@oracle.com/
[2]: http://www.linux-arm.org/git?p=linux-vs.git;a=shortlog;h=refs/heads/mainline/cfs-stealing/v4-rebase