From: Mike Galbraith <efault@gmx.de>
To: Peter Zijlstra <peterz@infradead.org>,
Mel Gorman <mgorman@techsingularity.net>
Cc: Ingo Molnar <mingo@redhat.com>,
Matt Fleming <matt@codeblueprint.co.uk>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 3/4] sched: Comment on why sync wakeups try to run on the current CPU
Date: Wed, 20 Dec 2017 05:21:37 +0100 [thread overview]
Message-ID: <1513743697.6863.24.camel@gmx.de> (raw)
In-Reply-To: <1513742961.6863.21.camel@gmx.de>
On Wed, 2017-12-20 at 05:09 +0100, Mike Galbraith wrote:
> Nope, stacking based upon that
> hint is most definitely not a good idea :)
Except when heavily loaded. The only thing worse for communicating
hogs being stacked is communicating hogs talking with another hog
between them.
-Mike
next prev parent reply other threads:[~2017-12-20 4:22 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-12-18 9:43 [PATCH 0/4] Reduce scheduler migrations due to wake_affine Mel Gorman
2017-12-18 9:43 ` [PATCH 1/4] sched: Only immediately migrate tasks due to interrupts if prev and target CPUs share cache Mel Gorman
2017-12-18 9:43 ` [PATCH 2/4] sched: Allow a wakee to run on the prev_cpu if it is idle and cache-affine with the waker Mel Gorman
2017-12-18 10:26 ` Peter Zijlstra
2017-12-18 10:56 ` Mel Gorman
2017-12-18 10:59 ` Peter Zijlstra
2017-12-18 9:43 ` [PATCH 3/4] sched: Comment on why sync wakeups try to run on the current CPU Mel Gorman
2017-12-19 19:06 ` Peter Zijlstra
2017-12-19 20:25 ` Mel Gorman
2017-12-20 4:09 ` Mike Galbraith
2017-12-20 4:21 ` Mike Galbraith [this message]
2017-12-18 9:43 ` [PATCH 4/4] sched: Allow tasks to stack with a workqueue on the same CPU Mel Gorman
2017-12-18 10:44 ` Mike Galbraith
2017-12-18 11:25 ` Mel Gorman
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