From mboxrd@z Thu Jan  1 00:00:00 1970
From: George Dunlap <George.Dunlap@eu.citrix.com>
Subject: Re: [PATCH 0 of 2] credit2: Reduce excessive cpu
	migration
Date: Thu, 09 Dec 2010 18:03:50 +0000
Message-ID: <4D011A06.3030804@eu.citrix.com>
References: <patchbomb.1291917315@gdunlap-desktop>
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Cc: Keir Fraser <keir.fraser@eu.citrix.com>
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Forgot to mention, this patch series (probably) relies on the 
poorly-spelled "credit2: Miscelaneous patches" series, and my not apply 
cleanly without it.

  -George

On 09/12/10 17:55, George Dunlap wrote:
> More recent processors have one L2 per core.  My plan for the credit2
> scheduler invovled having several cores sharing the same runqueue.
>
> I've measured the cost of excessive cross-L2 intra-L3 migrations, and while
> they're not excessive, they are measurable.  This patch series introduces
> some simple heuristics to reduce unnecessary migration.
>
> As in all the Credit2 work, this is a first cut, and I'm sure there are
> further improvments.