From owner-freebsd-amd64@FreeBSD.ORG Sat Jan 28 11:13:08 2006 Return-Path: X-Original-To: freebsd-amd64@freebsd.org Delivered-To: freebsd-amd64@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 82A7716A420 for ; Sat, 28 Jan 2006 11:13:08 +0000 (GMT) (envelope-from joao@matik.com.br) Received: from msrv.matik.com.br (msrv.matik.com.br [200.152.83.14]) by mx1.FreeBSD.org (Postfix) with ESMTP id 8E81743D46 for ; Sat, 28 Jan 2006 11:13:07 +0000 (GMT) (envelope-from joao@matik.com.br) Received: from anb (anb.matik.com.br [200.152.83.34]) by msrv.matik.com.br (8.13.4/8.13.1) with ESMTP id k0SBCtZh093125; Sat, 28 Jan 2006 09:12:56 -0200 (BRST) (envelope-from joao@matik.com.br) From: JoaoBR To: freebsd-amd64@freebsd.org Date: Sat, 28 Jan 2006 09:12:51 -0200 User-Agent: KMail/1.9.1 References: <200601270957.44032.kono@kth.se> <43DA6906.9030508@deadcafe.de> In-Reply-To: <43DA6906.9030508@deadcafe.de> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline Message-Id: <200601280912.52907.joao@matik.com.br> X-Filter-Version: 1.11a (msrv.matik.com.br) X-Virus-Scanned: ClamAV version 0.86.2, clamav-milter version 0.86 on msrv.matik.com.br X-Virus-Status: Clean Cc: kono@kth.se, Daniel Rock , mumag@nist.gov Subject: Re: dual vs single core opteron 100's X-BeenThere: freebsd-amd64@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Porting FreeBSD to the AMD64 platform List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 28 Jan 2006 11:13:08 -0000 On Friday 27 January 2006 16:40, Daniel Rock wrote: > Alexander Konovalenko schrieb: > > I have upgraded my AMD64 Athlon 3000+ to dual core X2 4400+. Now I can > > run two oommf tasks at the same time, and performance (I measure total > > execution time of the task) is around 186% comparing with 100% when only > > one task is running. This 7% degrade in performance per task is probably > > due to concurrent data transferring CPU<->RAM. I am very satisfied with > > X2 but just wonder if dual core Opteron gives better performance? Does > > anybody run OOMMF on Opteron? > > Besides the different CPUID, Athlon64 X2 (with 2x1MB Cache) and Dual-Core > Opteron 1xx are exactly the same. > Hi I believe this is not exactly correct If I am not wrong there is actual only the X2-4800 and 4400 with 2x1MB cach= e,=20 all others are having max 512K=20 The Opterons are having 2MB of cache, not 2x1=20 the manufacture technology of opterons and athlons-X2 are quiet different a= nd=20 there other tiny "server" related points (for me doubtless) a server-MB for dual opteron is also faster then a US100= =20 939 socket MB and probably much more stable IMO the opterons are faster when talking server, nevertheless the athlons a= re=20 much cheaper, not the processors but I can run real cheap MBs=20 when I do not need more than 3.5GB of RAM the performance difference is not= =20 that much so the athlon-X2 are an attractive alternative for US500-1000+ le= ss I have lot's of cache/gw servers and I am changing all to X2, the disk r/w= =20 performance advantage with good memory chips is very big in comparism to= =20 i386 P4 machines. I run also expensive perl tasks on this servers which gave my a bottleneck = on=20 UP a machines, the X2 SMPs are managing this as perfect as my dual-otperon= =20 server and for me the X2 is a very very good and cheap solution. I can not say anything for workstations but as long as you do not pass more= =20 than 6-8MB/s traffic through the machine a X2 Athlon may do it as good as a= n=20 Opteron system but probably depends also on what you do particulary with th= is=20 machine. Jo=E3o A mensagem foi scaneada pelo sistema de e-mail e pode ser considerada segura. Service fornecido pelo Datacenter Matik https://datacenter.matik.com.br