linux-kernel - Re: VolanoMark regression with 2.6.27-rc1

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Message-ID: <20080815153704.GB27955@elte.hu>
Date:	Fri, 15 Aug 2008 17:37:04 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc:	Dhaval Giani <dhaval@...ux.vnet.ibm.com>,
	"Zhang, Yanmin" <yanmin_zhang@...ux.intel.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Srivatsa Vaddagiri <vatsa@...ux.vnet.ibm.com>,
	Aneesh Kumar KV <aneesh.kumar@...ux.vnet.ibm.com>,
	Balbir Singh <balbir@...ibm.com>
Subject: Re: VolanoMark regression with 2.6.27-rc1


* Peter Zijlstra <a.p.zijlstra@...llo.nl> wrote:

> On Mon, 2008-08-04 at 11:23 +0530, Dhaval Giani wrote:
> 
> > Peter, vatsa, any ideas?
> 
> ---
> Subject: sched: scale sysctl_sched_shares_ratelimit with nr_cpus
> 
> David reported that his Niagra spend a little too much time in
> tg_shares_up(), which considering he has a large cpu count makes sense.
> 
> So scale the ratelimit value with the number of cpus like we do for
> other controls as well.

i've queued this up in tip/sched/urgent as it makes sense - but i'm also 
wondering, does this impact the volano numbers?

	Ingo
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