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Date: Fri, 09 Nov 2012 03:51:58 -0500 From: Rik van Riel <riel@...hat.com> To: Mel Gorman <mgorman@...e.de> CC: Peter Zijlstra <a.p.zijlstra@...llo.nl>, Andrea Arcangeli <aarcange@...hat.com>, Johannes Weiner <hannes@...xchg.org>, Thomas Gleixner <tglx@...utronix.de>, Linus Torvalds <torvalds@...ux-foundation.org>, Andrew Morton <akpm@...ux-foundation.org>, linux-kernel@...r.kernel.org, linux-mm@...ck.org, Ingo Molnar <mingo@...nel.org> Subject: Re: [PATCH 00/31] numa/core patches On 10/30/2012 08:20 AM, Mel Gorman wrote: > On Thu, Oct 25, 2012 at 02:16:17PM +0200, Peter Zijlstra wrote: >> Hi all, >> >> Here's a re-post of the NUMA scheduling and migration improvement >> patches that we are working on. These include techniques from >> AutoNUMA and the sched/numa tree and form a unified basis - it >> has got all the bits that look good and mergeable. >> > > Thanks for the repost. I have not even started a review yet as I was > travelling and just online today. It will be another day or two before I can > start but I was at least able to do a comparison test between autonuma and > schednuma today to see which actually performs the best. Even without the > review I was able to stick on similar vmstats as was applied to autonuma > to give a rough estimate of the relative overhead of both implementations. Peter, Ingo, do you have any comments on the performance measurements by Mel? Any ideas on how to fix sched/numa or numa/core? At this point, I suspect the easiest way forward might be to merge the basic infrastructure from Mel's combined tree (in -mm? in -tip?), so we can experiment with different NUMA placement policies on top. That way we can do apples to apples comparison of the policies, and figure out what works best, and why. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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