linux-kernel - Re: [PATCH v4 0/5] Reduce cross CPU IPI interference

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Message-ID: <CAOtvUMdj--5O6xB6zzrk+kYDASHWxxRMAkN2K-2z3z5hSwzcyw@mail.gmail.com>
Date:	Wed, 23 Nov 2011 08:52:31 +0200
From:	Gilad Ben-Yossef <gilad@...yossef.com>
To:	Chris Metcalf <cmetcalf@...era.com>
Cc:	linux-kernel@...r.kernel.org,
	Christoph Lameter <cl@...ux-foundation.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Russell King <linux@....linux.org.uk>, linux-mm@...ck.org,
	Pekka Enberg <penberg@...nel.org>,
	Matt Mackall <mpm@...enic.com>,
	Sasha Levin <levinsasha928@...il.com>,
	Rik van Riel <riel@...hat.com>,
	Andi Kleen <andi@...stfloor.org>
Subject: Re: [PATCH v4 0/5] Reduce cross CPU IPI interference

Hi

On Wed, Nov 23, 2011 at 3:36 AM, Chris Metcalf <cmetcalf@...era.com> wrote:
> On 11/22/2011 6:08 AM, Gilad Ben-Yossef wrote:
>> We have lots of infrastructure in place to partition a multi-core system such that we have a group of CPUs that are dedicated to
>
> Acked-by: Chris Metcalf <cmetcalf@...era.com>
>
> I think this kind of work is very important as more and more processing
> moves to isolated cpus that need protection from miscellaneous kernel
> interrupts.  Keep at it! :-)

Thank you very much. I believe it also has some small contribution to
keeping idle CPUs idle in a multi-core system. I consider this my
personal carbon offset effort :-)

My current plan is to take a look at each invocation of on_each_cpu in
core kernel code and see if it makes sense to give it a similar
treatment.

Thanks,
Gilad

-- 
Gilad Ben-Yossef
Chief Coffee Drinker
gilad@...yossef.com
Israel Cell: +972-52-8260388
US Cell: +1-973-8260388
http://benyossef.com

"Unfortunately, cache misses are an equal opportunity pain provider."
-- Mike Galbraith, LKML
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