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Message-ID: <df826f20-d183-98d0-78cd-d11191f97b28@efficios.com>
Date: Thu, 3 Aug 2023 16:12:57 -0400
From: Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
To: Swapnil Sapkal <Swapnil.Sapkal@....com>,
Shrikanth Hegde <sshegde@...ux.vnet.ibm.com>
Cc: linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...hat.com>,
Valentin Schneider <vschneid@...hat.com>,
Steven Rostedt <rostedt@...dmis.org>,
Ben Segall <bsegall@...gle.com>, Mel Gorman <mgorman@...e.de>,
Daniel Bristot de Oliveira <bristot@...hat.com>,
Vincent Guittot <vincent.guittot@...aro.org>,
Juri Lelli <juri.lelli@...hat.com>,
Aaron Lu <aaron.lu@...el.com>, x86@...nel.org,
Peter Zijlstra <peterz@...radead.org>,
Srikar Dronamraju <srikar@...ux.vnet.ibm.com>
Subject: Re: [RFC PATCH 1/1] sched: Extend cpu idle state for 1ms
On 8/3/23 01:53, Swapnil Sapkal wrote:
[...]
Those are interesting metrics. I still have no clue why it behaves that
way though.
More specifically: I also noticed that the number of migrations is
heavily affected, and that select_task_rq behavior changes drastically.
I'm unsure why though.
>
> Can you share your build config just in case I am missing something.
Build config attached.
Thanks,
Mathieu
>
>>
>> And using it now brings the hackbench wall time at 28s :)
>>
>> Thanks,
>>
>> Mathieu
>>
>>>
>>>>>> struct task_struct *stop;
>>>>>> unsigned long next_balance;
>>>>>> struct mm_struct *prev_mm;
>>>>
>>
> --
> Thanks and regards,
> Swapnil
--
Mathieu Desnoyers
EfficiOS Inc.
https://www.efficios.com
View attachment "config-hackbench-test" of type "text/plain" (277082 bytes)
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