From: Peter Zijlstra <peterz@infradead.org>
To: Jarmo Tiitto <jarmo.tiitto@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v4.9] sched/fair: Overload-On-Wakeup fix.
Date: Wed, 15 Mar 2017 13:26:47 +0100 [thread overview]
Message-ID: <20170315122647.GQ3093@worktop> (raw)
In-Reply-To: <1489527246.3961.3@smtp.gmail.com>
On Tue, Mar 14, 2017 at 11:34:06PM +0200, Jarmo Tiitto wrote:
> Try improve multi-core scaling.
> The changes are experimental - the fix works
> but possible regressions are unknown.
>
> Please read the orginal author's paper to understand
> the overall problem this patch tries to solve.
>
> See the orignal patches at:
> https://github.com/jplozi/wastedcores/tree/master/patches
>
> And the related paper at:
> http://www.i3s.unice.fr/~jplozi/wastedcores/
>
> v1: the patch was re-written for v4.9 to remove goto statement.
>
> v2: improved version from the wastedcores initial code. try take into
> account the cpu wake-up latency and choose most recent idle cpu
> instead.
>
> I have tested the code and it really does improve
> multi-core performance on my machine.
v4.9 is not the right kernel to send patches against (hint: v4.10 is not
either).
Also your Changelog is inadequate; it should be self contained, explain
the problem and describe the solution.
prev parent reply other threads:[~2017-03-15 12:28 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-14 21:34 [PATCH v4.9] sched/fair: Overload-On-Wakeup fix Jarmo Tiitto
2017-03-15 12:26 ` Peter Zijlstra [this message]
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