linux-kernel - Re: [RFC PATCH 00/10] Improve numa scheduling by consolidating tasks

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Message-ID: <20130730091542.GA28656@linux.vnet.ibm.com>
Date:	Tue, 30 Jul 2013 14:45:43 +0530
From:	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Mel Gorman <mgorman@...e.de>, Ingo Molnar <mingo@...nel.org>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Johannes Weiner <hannes@...xchg.org>,
	Linux-MM <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Preeti U Murthy <preeti@...ux.vnet.ibm.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [RFC PATCH 00/10] Improve numa scheduling by consolidating tasks

* Peter Zijlstra <peterz@...radead.org> [2013-07-30 10:20:01]:

> On Tue, Jul 30, 2013 at 10:17:55AM +0200, Peter Zijlstra wrote:
> > On Tue, Jul 30, 2013 at 01:18:15PM +0530, Srikar Dronamraju wrote:
> > > Here is an approach that looks to consolidate workloads across nodes.
> > > This results in much improved performance. Again I would assume this work
> > > is complementary to Mel's work with numa faulting.
> > 
> > I highly dislike the use of task weights here. It seems completely
> > unrelated to the problem at hand.
> 
> I also don't particularly like the fact that it's purely process based.
> The faults information we have gives much richer task relations.
> 

Peter, 

Can you please suggest workloads that I could try which might showcase
why you hate pure process based approach?

I know numa02_SMT does regress with my patches but I think its most
my implementation fault and not a approach issue.

-- 
Thanks and Regards
Srikar Dronamraju

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