From: Christoph Lameter <cl@gentwo.org>
To: Dimitri Sivanich <sivanich@sgi.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
Mel Gorman <mel@csn.ul.ie>
Subject: Re: [PATCH] Reduce vm_stat cacheline contention in __vm_enough_memory
Date: Fri, 14 Oct 2011 08:57:16 -0500 (CDT) [thread overview]
Message-ID: <alpine.DEB.2.00.1110140856420.6411@router.home> (raw)
In-Reply-To: <20111014135055.GA28592@sgi.com>
On Fri, 14 Oct 2011, Dimitri Sivanich wrote:
> Testing on a smaller machine with 46 writer threads in parallel (my original
> test used 120).
>
> Looks as though cache-aligning and padding the end of the vm_stat array
> results in a ~150 MB/sec speedup. This is a nice improvement for only 46
> writer threads, though it's not the full ~250 MB/sec speedup I get from
> setting OVERCOMMIT_NEVER.
Add to this the increase in the deltas for the ZVCs and change the stat
interval to 10 sec?
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next prev parent reply other threads:[~2011-10-14 13:57 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20111012160202.GA18666@sgi.com>
2011-10-12 19:01 ` Andrew Morton
2011-10-12 19:57 ` Christoph Lameter
2011-10-13 15:06 ` Mel Gorman
2011-10-13 15:59 ` Andi Kleen
2011-10-13 15:23 ` Dimitri Sivanich
2011-10-13 15:54 ` Christoph Lameter
2011-10-13 20:50 ` Andrew Morton
2011-10-13 21:02 ` Christoph Lameter
2011-10-13 21:24 ` Andrew Morton
2011-10-14 12:25 ` Dimitri Sivanich
2011-10-14 13:50 ` Dimitri Sivanich
2011-10-14 13:57 ` Christoph Lameter [this message]
2011-10-14 14:19 ` Dimitri Sivanich
2011-10-14 14:34 ` Christoph Lameter
2011-10-14 15:18 ` Christoph Lameter
2011-10-14 16:16 ` Dimitri Sivanich
2011-10-18 13:48 ` Dimitri Sivanich
2011-10-18 14:36 ` Christoph Lameter
2011-10-18 15:48 ` Andi Kleen
2011-10-19 1:16 ` David Rientjes
2011-10-19 14:54 ` Dimitri Sivanich
2011-10-19 15:31 ` Christoph Lameter
2011-10-24 14:59 ` Dimitri Sivanich
[not found] ` <CADE8fzrdMOBF1RyyEpMVi8aKcgOVKRQSKi0=c1Qvh3p6hHcXRA@mail.gmail.com>
2011-10-13 0:07 ` Tim Chen
2011-10-13 14:15 ` Christoph Lameter
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