From: Pavel Machek <pavel@ucw.cz>
To: Christoph Lameter <clameter@engr.sgi.com>
Cc: torvalds@osdl.org, akpm@osdl.org, nickpiggin@yahoo.com.au,
hugh@veritas.com, linux-mm@kvack.org,
linux-kernel@vger.kernel.org
Subject: Re: Hugh's alternate page fault scalability approach on 512p Altix
Date: Thu, 15 Sep 2005 14:54:33 +0200 [thread overview]
Message-ID: <20050915125433.GA468@openzaurus.ucw.cz> (raw)
In-Reply-To: <Pine.LNX.4.62.0509061129380.16939@schroedinger.engr.sgi.com>
Hi!
> 2. The use rss and anon_rss deltas instead of atomic incs brings small
> performance enhancements in the lower cpu ranges (1-32) but hurt (%50
> performance drop at 512 processors) in the high range. The hurting may
> be due to the percularities of SGIs NUMA router architecture and the
I'd say that 50% drop at 512 CPUs is acceptable. I did not even
know we support that many CPUs.
Pavel
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prev parent reply other threads:[~2005-09-15 12:54 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-09-06 18:31 Christoph Lameter
2005-09-07 14:28 ` Martin J. Bligh
2005-09-07 15:42 ` Christoph Lameter
2005-09-07 18:19 ` Martin J. Bligh
2005-09-15 12:54 ` Pavel Machek [this message]
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