Date: Sat, 28 Jan 2006 18:50:05 -0200 From: JoaoBR <joao@matik.com.br> To: "O. Hartmann" <ohartman@mail.uni-mainz.de> Cc: kono@kth.se, Daniel Rock <freebsd@deadcafe.de>, mumag@nist.gov, freebsd-amd64@freebsd.org Subject: Re: dual vs single core opteron 100's Message-ID: <200601281850.07422.joao@matik.com.br> In-Reply-To: <43DB7457.6050605@mail.uni-mainz.de> References: <200601270957.44032.kono@kth.se> <200601280912.52907.joao@matik.com.br> <43DB7457.6050605@mail.uni-mainz.de>
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On Saturday 28 January 2006 11:40, O. Hartmann wrote: > > > > If I am not wrong there is actual only the X2-4800 and 4400 with 2x1MB > > cache, all others are having max 512K > > We were talking about comparable Athlon64/Opterons for socket 939. > > > The Opterons are having 2MB of cache, not 2x1 > > No, that's wrong. Dual-core 1XX Opterons do have two times 1MB 2nd level > cache for each core, not a unified 2MB cache! > right, well, I didn't read with attention ... sincerly I was not even aware= of=20 existing socket 939 opterons so all my opteron opinions were not related wi= th=20 this ones I just reread the processor comparism query on amd's site where the dual=20 opterons are returned with 2MB cache=20 http://www.amdcompare.com/us-en/opteron/Default.aspx#grid but on the data sheet they are as 1MB per core, so 2x1Mb http://www.amd.com/us-en/Processors/ProductInformation/0,,30_118_8796_9240,= 00.html I guess you are right here, make sense and I do not care so much either ;) anyway, amd should be able to give exact info on all papers the publish > All right, talking about scientific calculations, I would prefer a real > dual chip plus dual core Opteron 2xx system due to the fact, memory > bandwith is much more efficient when using NUMA architecture. But in my > opinion, comparin dual chip and dual core Opterons (and their Athlon64 > counterparts) is comparing cherries and pineapples ... > sure, absolutly, but often on smaller or low bandwidth server the differenc= e=20 is not even appearing, for the client I mean, I have no idea how this is on= =20 PCs or Workstations but money is a strong point when you get the same quantity of "cherries" at= =20 the end, so the comparism is it worth to talk about and find out the limits 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
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