From: George Dunlap <George.Dunlap@eu.citrix.com>
To: "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>
Cc: Keir Fraser <keir.fraser@eu.citrix.com>
Subject: Re: [PATCH 0 of 2] credit2: Reduce excessive cpu migration
Date: Thu, 09 Dec 2010 18:03:50 +0000 [thread overview]
Message-ID: <4D011A06.3030804@eu.citrix.com> (raw)
In-Reply-To: <patchbomb.1291917315@gdunlap-desktop>
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.
prev parent reply other threads:[~2010-12-09 18:03 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-12-09 17:55 [PATCH 0 of 2] credit2: Reduce excessive cpu migration George Dunlap
2010-12-09 17:55 ` [PATCH 1 of 2] credit2: Don't migrate cpus unnecessarily George Dunlap
2010-12-09 17:55 ` [PATCH 2 of 2] credit2: Implement cross-L2 migration "resistance" George Dunlap
2010-12-09 18:03 ` George Dunlap [this message]
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