linux-kernel - Re: [PATCH] cpuidle: menu: use nr_running instead of cpuload for calculating perf mult

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Message-ID: <1338868135.7356.5.camel@marge.simpson.net>
Date:	Tue, 05 Jun 2012 05:48:55 +0200
From:	Mike Galbraith <efault@....de>
To:	Arjan van de Ven <arjan@...ux.intel.com>
Cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Vladimir Davydov <vdavydov@...allels.com>,
	Ingo Molnar <mingo@...e.hu>, Len Brown <lenb@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] cpuidle: menu: use nr_running instead of cpuload for
 calculating perf mult

On Mon, 2012-06-04 at 08:39 -0700, Arjan van de Ven wrote:

> if there is a lot of idle, load can be low or high; load is more than
> just cpu usage. it includes waiting for resources and mutexes etc.

05:40:42 up 39 min, 20 users,  load average: 0.63, 0.53, 0.42
root     pts/11    05:03    5:05   6:16   0.00s /bin/sh /root/bin/tbench.sh 1 400

Like scheduling something cross core that is close to being synchronous.

-Mike

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