Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262623AbUJ1AyR (ORCPT ); Wed, 27 Oct 2004 20:54:17 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262574AbUJ1Axm (ORCPT ); Wed, 27 Oct 2004 20:53:42 -0400 Received: from hostmaster.org ([212.186.110.32]:59035 "EHLO hostmaster.org") by vger.kernel.org with ESMTP id S262710AbUJ1AvR (ORCPT ); Wed, 27 Oct 2004 20:51:17 -0400 Subject: Re: Dual Opteron box, what's the optimal memory placement for the CPUs? From: Thomas Zehetbauer To: Jesper Juhl Cc: linux-kernel In-Reply-To: References: Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="=-qhA3Ij49parpiTJXXfpB" Date: Thu, 28 Oct 2004 02:51:15 +0200 Message-Id: <1098924675.11282.60.camel@hostmaster.org> Mime-Version: 1.0 X-Mailer: Evolution 2.0.2 (2.0.2-3) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1716 Lines: 51 --=-qhA3Ij49parpiTJXXfpB Content-Type: text/plain Content-Transfer-Encoding: quoted-printable 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. --=20 T h o m a s Z e h e t b a u e r ( TZ251 ) PGP encrypted mail preferred - KeyID 96FFCB89 finger thomasz@hostmaster.org for key XT emulator finally available for Pentium-IV: install Windows XP today! --=-qhA3Ij49parpiTJXXfpB Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.6 (GNU/Linux) iQEVAwUAQYBCg2D1OYqW/8uJAQLgqAf/dxswsbIh3PNv7pMH+9h6U8TL2mEeHwlj obm6Zj15ueEPK4BtPa6vcwsgITySCPEQgNhMqJyBDh2UkLqRMSrHEGW3VLD+pa+E jPETYfIYa0A34+KzFqDQ5xY6x2S7Mt+Z/dTXCIEzIGMsmo+h4kaIaYS/9Lp4FxaW /ZhOEiHTL6R9dGAHt8cLHyDqZJ4aEETcY4QqJmy0kg3A0RDFgzeCHiuv/CJPoYfu eS3Ov8ZHTk7cPnr+lUDlNskfbg3Qwa0GRqYORKFyDFhGdHbGWYn/Jcmk2N1kjE8+ IR6paPBcgwme+2rN4lXL11+hCuOjtkbcE3SCGBQg6oduoLNe1AWHfA== =eTRl -----END PGP SIGNATURE----- --=-qhA3Ij49parpiTJXXfpB-- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/