From: Thomas Zehetbauer <thomasz@hostmaster.org>
To: Jesper Juhl <juhl-lkml@dif.dk>
Cc: linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: Dual Opteron box, what's the optimal memory placement for the CPUs?
Date: Thu, 28 Oct 2004 02:51:15 +0200 [thread overview]
Message-ID: <1098924675.11282.60.camel@hostmaster.org> (raw)
In-Reply-To: <Pine.LNX.4.61.0410272316160.3284@dragon.hygekrogen.localhost>
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That is indeed a very good question.
If you use node interleaving you end up with memory accesses to be
distributed matching the amount of memory installed on each node.
Assuming that processes prefer the first node you get better performance
with load < 1 and memory usage < $first_node_memory.
If you use a NUMA configuration you should get better performance from
almost equally distributed memory. Especially when the load goes up.
Tom
PS: I choosed NUMA with equally distributed memory.
--
T h o m a s Z e h e t b a u e r ( TZ251 )
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prev parent reply other threads:[~2004-10-28 0:54 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-10-27 21:21 Dual Opteron box, what's the optimal memory placement for the CPUs? Jesper Juhl
2004-10-27 21:43 ` Joel Jaeggli
2004-10-27 22:00 ` Jesper Juhl
2004-10-27 23:27 ` Petr Vandrovec
2004-10-28 0:51 ` Thomas Zehetbauer [this message]
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