From: "Martin J. Bligh" <mbligh@mbligh.org>
To: Christoph Lameter <clameter@engr.sgi.com>
Cc: William Lee Irwin III <wli@holomorphy.com>,
Andrew Morton <akpm@linux-foundation.org>,
Rik van Riel <riel@redhat.com>,
Bill Irwin <bill.irwin@oracle.com>, Mel Gorman <mel@skynet.ie>,
npiggin@suse.de, mingo@elte.hu, jschopp@austin.ibm.com,
arjan@infradead.org, torvalds@linux-foundation.org,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: The performance and behaviour of the anti-fragmentation related patches
Date: Sat, 03 Mar 2007 09:16:36 -0800 [thread overview]
Message-ID: <45E9AD74.4060704@mbligh.org> (raw)
In-Reply-To: <Pine.LNX.4.64.0703021913030.31787@schroedinger.engr.sgi.com>
Christoph Lameter wrote:
> On Fri, 2 Mar 2007, William Lee Irwin III wrote:
>
>> On Fri, Mar 02, 2007 at 02:22:56PM -0800, Andrew Morton wrote:
>>> Opterons seem to be particularly prone to lock starvation where a cacheline
>>> gets captured in a single package for ever.
>> AIUI that phenomenon is universal to NUMA. Maybe it's time we
>> reexamined our locking algorithms in the light of fairness
>> considerations.
>
> This is a phenomenon that is usually addressed at the cache logic level.
> Its a hardware maturation issue. A certain package should not be allowed
> to hold onto a cacheline forever and other packages must have a mininum
> time when they can operate on that cacheline.
That'd be nice. Unfortunately we're stuck in the real world with
real hardware, and the situation is likely to remain thus for
quite some time ...
M.
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next prev parent reply other threads:[~2007-03-03 17:16 UTC|newest]
Thread overview: 99+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-03-01 10:12 The performance and behaviour of the anti-fragmentation related patches Mel Gorman
2007-03-02 0:09 ` Andrew Morton
2007-03-02 0:44 ` Linus Torvalds
2007-03-02 1:52 ` Balbir Singh
2007-03-02 3:44 ` Linus Torvalds
2007-03-02 3:59 ` Andrew Morton
2007-03-02 5:11 ` Linus Torvalds
2007-03-02 5:50 ` KAMEZAWA Hiroyuki
2007-03-02 6:15 ` Paul Mundt
2007-03-02 17:01 ` Mel Gorman
2007-03-02 16:20 ` Mark Gross
2007-03-02 17:07 ` Andrew Morton
2007-03-02 17:35 ` Mark Gross
2007-03-02 18:02 ` Andrew Morton
2007-03-02 19:02 ` Mark Gross
2007-03-02 17:16 ` Linus Torvalds
2007-03-02 18:45 ` Mark Gross
2007-03-02 19:03 ` Linus Torvalds
2007-03-02 23:58 ` Martin J. Bligh
2007-03-02 4:18 ` Balbir Singh
2007-03-02 5:13 ` Jeremy Fitzhardinge
2007-03-06 4:16 ` Paul Mackerras
2007-03-02 16:58 ` Mel Gorman
2007-03-02 17:05 ` Joel Schopp
2007-03-05 3:21 ` Nick Piggin
2007-03-05 15:20 ` Joel Schopp
2007-03-05 16:01 ` Nick Piggin
2007-03-05 16:45 ` Joel Schopp
2007-05-03 8:49 ` Andy Whitcroft
2007-03-02 1:39 ` Balbir Singh
2007-03-02 2:34 ` KAMEZAWA Hiroyuki
2007-03-02 3:05 ` Christoph Lameter
2007-03-02 3:57 ` Nick Piggin
2007-03-02 4:06 ` Christoph Lameter
2007-03-02 4:21 ` Nick Piggin
2007-03-02 4:31 ` Christoph Lameter
2007-03-02 5:06 ` Nick Piggin
2007-03-02 5:40 ` Christoph Lameter
2007-03-02 5:49 ` Nick Piggin
2007-03-02 5:53 ` Christoph Lameter
2007-03-02 6:08 ` Nick Piggin
2007-03-02 6:19 ` Christoph Lameter
2007-03-02 6:29 ` Nick Piggin
2007-03-02 6:51 ` Christoph Lameter
2007-03-02 7:03 ` Andrew Morton
2007-03-02 7:19 ` Nick Piggin
2007-03-02 7:44 ` Christoph Lameter
2007-03-02 8:12 ` Nick Piggin
2007-03-02 8:21 ` Christoph Lameter
2007-03-02 8:38 ` Nick Piggin
2007-03-02 17:09 ` Christoph Lameter
2007-03-04 1:26 ` Rik van Riel
2007-03-04 1:51 ` Andrew Morton
2007-03-04 1:58 ` Rik van Riel
2007-03-02 5:50 ` Christoph Lameter
2007-03-02 4:29 ` Andrew Morton
2007-03-02 4:33 ` Christoph Lameter
2007-03-02 4:58 ` Andrew Morton
2007-03-02 4:20 ` Paul Mundt
2007-03-02 13:50 ` Arjan van de Ven
2007-03-02 15:29 ` Rik van Riel
2007-03-02 16:58 ` Andrew Morton
2007-03-02 17:09 ` Mel Gorman
2007-03-02 17:23 ` Christoph Lameter
2007-03-02 17:35 ` Andrew Morton
2007-03-02 17:43 ` Rik van Riel
2007-03-02 18:06 ` Andrew Morton
2007-03-02 18:15 ` Christoph Lameter
2007-03-02 18:23 ` Andrew Morton
2007-03-02 18:23 ` Rik van Riel
2007-03-02 19:31 ` Christoph Lameter
2007-03-02 19:40 ` Rik van Riel
2007-03-02 21:12 ` Bill Irwin
2007-03-02 21:19 ` Rik van Riel
2007-03-02 21:52 ` Andrew Morton
2007-03-02 22:03 ` Rik van Riel
2007-03-02 22:22 ` Andrew Morton
2007-03-02 22:34 ` Rik van Riel
2007-03-02 22:51 ` Martin Bligh
2007-03-02 22:54 ` Rik van Riel
2007-03-02 23:28 ` Martin J. Bligh
2007-03-03 0:24 ` Andrew Morton
2007-03-02 22:52 ` Chuck Ebbert
2007-03-02 22:59 ` Andrew Morton
2007-03-02 23:20 ` Rik van Riel
2007-03-03 1:40 ` William Lee Irwin III
2007-03-03 1:58 ` Andrew Morton
2007-03-03 3:55 ` William Lee Irwin III
2007-03-03 0:33 ` William Lee Irwin III
2007-03-03 0:54 ` Andrew Morton
2007-03-03 3:15 ` Christoph Lameter
2007-03-03 4:19 ` William Lee Irwin III
2007-03-03 17:16 ` Martin J. Bligh [this message]
2007-03-03 17:50 ` Christoph Lameter
2007-03-02 20:59 ` Bill Irwin
2007-03-02 1:52 ` Bill Irwin
2007-03-02 10:38 ` Mel Gorman
2007-03-02 16:31 ` Joel Schopp
2007-03-02 21:37 ` Bill Irwin
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