linux-kernel - Re: [PATCH 3/3] sched, fair: Stop searching for tasks in newidle balance if there are runnable tasks

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Message-ID: <20140424165403.GY11096@twins.programming.kicks-ass.net>
Date:	Thu, 24 Apr 2014 18:54:03 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Jason Low <jason.low2@...com>
Cc:	mingo@...nel.org, linux-kernel@...r.kernel.org,
	daniel.lezcano@...aro.org, alex.shi@...aro.org,
	preeti@...ux.vnet.ibm.com, efault@....de,
	vincent.guittot@...aro.org, morten.rasmussen@....com, aswin@...com,
	chegu_vinod@...com
Subject: Re: [PATCH 3/3] sched, fair: Stop searching for tasks in newidle
 balance if there are runnable tasks

On Thu, Apr 24, 2014 at 09:43:09AM -0700, Jason Low wrote:
> I recall seeing somewhere around a +7% performance improvement
> in at least least 1 of the AIM7 workloads. I can do some more testing
> with this.

But yeah, please test more than 1 workload; its fairly typical for one
workload to win and another to completely tank :-/
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