linux-kernel - Re: scale sysctl_sched_shares_ratelimit with nr

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Message-ID: <20080818065220.GA2711@elte.hu>
Date:	Mon, 18 Aug 2008 08:52:20 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	"Zhang, Yanmin" <yanmin.zhang@...el.com>
Cc:	a.p.zijlstra@...llo.nl,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: scale sysctl_sched_shares_ratelimit with nr_cpus


* Zhang, Yanmin <yanmin.zhang@...el.com> wrote:

> Ingo,
> 
> My linux mailbox is locked, so I send from my another mail box.
> 
> I tested the patch of scale sysctl_sched_shares_ratelimit with nr_cpus 
> on 16-core tigerton by volanoMark. CONFIG_GROUP_SCHED=y. Comparing 
> with pure 2.6.27-rc3, the patched kernel has about 15% improvement, 
> and it seems volanoMark runs more smoothly with the patched kernel.

cool. It's already upstream (post-rc3 commit):

  55cd534: sched: scale sysctl_sched_shares_ratelimit with nr_cpus

	Ingo
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