Date: Sat, 28 Jan 2006 09:12:51 -0200 From: JoaoBR <joao@matik.com.br> To: freebsd-amd64@freebsd.org Cc: kono@kth.se, Daniel Rock <freebsd@deadcafe.de>, mumag@nist.gov Subject: Re: dual vs single core opteron 100's Message-ID: <200601280912.52907.joao@matik.com.br> In-Reply-To: <43DA6906.9030508@deadcafe.de> References: <200601270957.44032.kono@kth.se> <43DA6906.9030508@deadcafe.de>
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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
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