linux-kernel - Re: sched: Performance of Trade workload running inside VM

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Message-ID: <1329326787.2293.153.camel@twins>
Date:	Wed, 15 Feb 2012 18:26:27 +0100
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	Srivatsa Vaddagiri <vatsa@...ux.vnet.ibm.com>
Cc:	mingo@...e.hu, pjt@...gle.com, efault@....de, venki@...gle.com,
	suresh.b.siddha@...el.com, linux-kernel@...r.kernel.org,
	"Nikunj A. Dadhania" <nikunj@...ux.vnet.ibm.com>
Subject: Re: sched: Performance of Trade workload running inside VM

On Wed, 2012-02-15 at 22:40 +0530, Srivatsa Vaddagiri wrote:
> Isn't it already broken in some respect, given that
> select_idle_sibling() could select a cpu which is different from
> wakeup
> source (thus forcing a task to run on a cpu different from wakeup
> source)? 

select_idle_sibling() should keep it in the same cache domain, thereby
reducing pain and increasing parallelism.
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