linux-kernel - Re: sched: tweak select_idle_sibling to look for idle threads

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Message-ID: <20160509083330.GH3430@twins.programming.kicks-ass.net>
Date:	Mon, 9 May 2016 10:33:30 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Mike Galbraith <mgalbraith@...e.de>
Cc:	Matt Fleming <matt@...eblueprint.co.uk>, Chris Mason <clm@...com>,
	Ingo Molnar <mingo@...nel.org>, linux-kernel@...r.kernel.org
Subject: Re: sched: tweak select_idle_sibling to look for idle threads

On Fri, May 06, 2016 at 08:54:38PM +0200, Mike Galbraith wrote:
> master
> Throughput 2722.43 MB/sec  4 clients  4 procs  max_latency=2.400 ms

> echo NO_IDLE_SIBLING > /sys/kernel/debug/sched_features
> Throughput 3484.18 MB/sec  4 clients  4 procs  max_latency=3.430 ms

Yeah, I know about that bump, I just haven't managed to find a way to
preserve that and keep all the other benchmarks ticking along :/