From: Andrea Arcangeli <aarcange@redhat.com>
To: Mel Gorman <mel@csn.ul.ie>
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
Linus Torvalds <torvalds@linux-foundation.org>,
Andrew Morton <akpm@linux-foundation.org>,
Peter Zijlstra <pzijlstr@redhat.com>, Ingo Molnar <mingo@elte.hu>,
Hugh Dickins <hughd@google.com>, Rik van Riel <riel@redhat.com>,
Johannes Weiner <hannes@cmpxchg.org>,
Hillf Danton <dhillf@gmail.com>,
Andrew Jones <drjones@redhat.com>, Dan Smith <danms@us.ibm.com>,
Thomas Gleixner <tglx@linutronix.de>,
Paul Turner <pjt@google.com>, Christoph Lameter <cl@linux.com>,
Suresh Siddha <suresh.b.siddha@intel.com>,
Mike Galbraith <efault@gmx.de>,
"Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Subject: Re: [PATCH 00/33] AutoNUMA27
Date: Fri, 12 Oct 2012 02:41:33 +0200 [thread overview]
Message-ID: <20121012004133.GZ1818@redhat.com> (raw)
In-Reply-To: <20121011153503.GX3317@csn.ul.ie>
On Thu, Oct 11, 2012 at 04:35:03PM +0100, Mel Gorman wrote:
> If System CPU time really does go down as this converges then that
> should be obvious from monitoring vmstat over time for a test. Early on
> - high usage with that dropping as it converges. If that doesn't happen
> then the tasks are not converging, the phases change constantly or
> something unexpected happened that needs to be identified.
Yes, all measurable kernel cost should be in the memory copies
(migration and khugepaged, the latter is going to be optimized away).
The migrations must stop after the workload converges. Either
migrations are used to reach convergence or they shouldn't happen in
the first place (not in any measurable amount).
> Ok. Are they separate STREAM instances or threads running on the same
> arrays?
My understanding is separate instances. I think it's a single threaded
benchmark and you run many copies. It was modified to run for 5min
(otherwise upstream has not enough time to get it wrong, as result of
background scheduling jitters).
Thanks!
next prev parent reply other threads:[~2012-10-12 0:42 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1349308275-2174-1-git-send-email-aarcange@redhat.com>
[not found] ` <20121004113943.be7f92a0.akpm@linux-foundation.org>
2012-10-05 23:14 ` [PATCH 00/33] AutoNUMA27 Andi Kleen
2012-10-05 23:57 ` Tim Chen
2012-10-06 0:11 ` Andi Kleen
2012-10-08 13:44 ` Don Morris
2012-10-08 20:34 ` Rik van Riel
[not found] ` <20121011101930.GM3317@csn.ul.ie>
2012-10-11 14:56 ` Andrea Arcangeli
2012-10-11 15:35 ` Mel Gorman
2012-10-12 0:41 ` Andrea Arcangeli [this message]
2012-10-12 14:54 ` Mel Gorman
[not found] ` <1349308275-2174-2-git-send-email-aarcange@redhat.com>
[not found] ` <20121011105036.GN3317@csn.ul.ie>
2012-10-11 16:07 ` [PATCH 01/33] autonuma: add Documentation/vm/autonuma.txt Andrea Arcangeli
2012-10-11 19:37 ` Mel Gorman
[not found] ` <1349308275-2174-5-git-send-email-aarcange@redhat.com>
[not found] ` <20121011110137.GQ3317@csn.ul.ie>
2012-10-11 16:43 ` [PATCH 04/33] autonuma: define _PAGE_NUMA Andrea Arcangeli
2012-10-11 19:48 ` Mel Gorman
[not found] ` <1349308275-2174-6-git-send-email-aarcange@redhat.com>
[not found] ` <20121011111545.GR3317@csn.ul.ie>
2012-10-11 16:58 ` [PATCH 05/33] autonuma: pte_numa() and pmd_numa() Andrea Arcangeli
2012-10-11 19:54 ` Mel Gorman
[not found] ` <1349308275-2174-7-git-send-email-aarcange@redhat.com>
[not found] ` <20121011122255.GS3317@csn.ul.ie>
2012-10-11 17:05 ` [PATCH 06/33] autonuma: teach gup_fast about pmd_numa Andrea Arcangeli
2012-10-11 20:01 ` Mel Gorman
[not found] ` <1349308275-2174-8-git-send-email-aarcange@redhat.com>
[not found] ` <20121011122827.GT3317@csn.ul.ie>
2012-10-11 17:15 ` [PATCH 07/33] autonuma: mm_autonuma and task_autonuma data structures Andrea Arcangeli
2012-10-11 20:06 ` Mel Gorman
[not found] ` <5076E4B2.2040301@redhat.com>
[not found] ` <0000013a525a8739-2b4049fa-1cb3-4b8f-b3a7-1fa77b181590-000000@email.amazonses.com>
2012-10-12 0:52 ` Andrea Arcangeli
[not found] ` <1349308275-2174-9-git-send-email-aarcange@redhat.com>
[not found] ` <20121011134643.GU3317@csn.ul.ie>
2012-10-11 17:34 ` [PATCH 08/33] autonuma: define the autonuma flags Andrea Arcangeli
2012-10-11 20:17 ` Mel Gorman
[not found] ` <1349308275-2174-11-git-send-email-aarcange@redhat.com>
[not found] ` <20121011145805.GW3317@csn.ul.ie>
2012-10-12 0:25 ` [PATCH 10/33] autonuma: CPU follows memory algorithm Andrea Arcangeli
2012-10-12 8:29 ` Mel Gorman
[not found] ` <20121011213432.GQ3317@csn.ul.ie>
2012-10-12 1:45 ` [PATCH 00/33] AutoNUMA27 Andrea Arcangeli
2012-10-12 8:46 ` Mel Gorman
[not found] ` <1349308275-2174-16-git-send-email-aarcange@redhat.com>
[not found] ` <20121011155302.GA3317@csn.ul.ie>
[not found] ` <50770314.7060800@redhat.com>
[not found] ` <20121011175953.GT1818@redhat.com>
2012-10-12 14:03 ` [PATCH 15/33] autonuma: alloc/free/init task_autonuma Rik van Riel
2012-10-13 18:40 ` [PATCH 00/33] AutoNUMA27 Srikar Dronamraju
2012-10-14 4:57 ` Andrea Arcangeli
2012-10-15 8:16 ` Srikar Dronamraju
2012-10-23 16:32 ` Srikar Dronamraju
[not found] ` <1349308275-2174-20-git-send-email-aarcange@redhat.com>
[not found] ` <20121013180618.GC31442@linux.vnet.ibm.com>
2012-10-15 8:24 ` [PATCH 19/33] autonuma: memory follows CPU algorithm and task/mm_autonuma stats collection Srikar Dronamraju
2012-10-15 9:20 ` Mel Gorman
2012-10-15 10:00 ` Srikar Dronamraju
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