Re: [PATCH 3/4] sched,numa: implement numa node level wake_affine

From	Peter Zijlstra <peterz@infradead.org>
Newsgroups	linux.kernel
Subject	Re: [PATCH 3/4] sched,numa: implement numa node level wake_affine
Date	2017-06-26 16:50 +0200
Message-ID	<tWDuW-3Bo-15@gated-at.bofh.it> (permalink)
References	<tVA65-4Fr-3@gated-at.bofh.it> <tVA66-4Fr-7@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Fri, Jun 23, 2017 at 12:55:29PM -0400, riel@redhat.com wrote:
> From: Rik van Riel <riel@redhat.com>
> 
> Since select_idle_sibling can place a task anywhere on a socket,
> comparing loads between individual CPU cores makes no real sense
> for deciding whether to do an affine wakeup across sockets, either.
> 
> Instead, compare the load between the sockets in a similar way the
> load balancer and the numa balancing code do.

This seems to assume LLC == NUMA, which isn't strictly so.

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[PATCH 3/4] sched,numa: implement numa node level wake_affine riel@redhat.com - 2017-06-23 19:00 +0200
  [tip:sched/core] sched/numa: Implement NUMA node level  wake_affine() tip-bot for Rik van Riel <tipbot@zytor.com> - 2017-06-24 09:30 +0200
  Re: [PATCH 3/4] sched,numa: implement numa node level wake_affine Peter Zijlstra <peterz@infradead.org> - 2017-06-26 16:50 +0200

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