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Path: euryale.cc.adfa.oz.au!newshost.carno.net.au!harbinger.cc.monash.edu.au!nntp.coast.net!howland.erols.net!news.sprintlink.net!new-news.sprintlink.net!news.infi.net!newsfeed.direct.ca!op.net!news.mathworks.com!newsfeed.internetmci.com!swrinde!cs.utexas.edu!math.ohio-state.edu!jussieu.fr!rain.fr!speedy.grolier.fr!news-lond.gsl.net!news.gsl.net!dispatch.news.demon.net!demon!awfulhak.demon.co.uk!awfulhak.demon.co.uk!awfulhak.demon.co.uk!not-for-mail From: brian@awfulhak.demon.co.uk (Brian Somers) Newsgroups: comp.unix.bsd.freebsd.misc Subject: Re: dual cpu stuff... Date: 21 Aug 1996 11:58:15 +0100 Organization: Coverform Ltd. Lines: 44 Message-ID: <4veq47$cc@anorak.coverform.lan> References: <4vcsn4$7ql@cantina.clinet.fi> NNTP-Posting-Host: localhost.coverform.lan X-NNTP-Posting-Host: awfulhak.demon.co.uk X-Newsreader: TIN [version 1.2 PL2] Mika Ruohotie (mickey@cantina.clinet.fi) wrote: : i know this doesnt quite belong here, right? : but i prefer asking here since i dont trust people on hardware groups : too much... : i'm about to get a dual cpu pentium board in few weeks time, and realized : the other day it has only 512 pipeline cache, do i get slower performance : when i put two p166/p200 on the board? I'd get a dual PPro board - no problem with the cache then ! : i remember reading that over p133 the cpus prefer 512kb cache _each_, : ofcourse, i was unable to figure out is 512 still enough since the : cpu's are "interlaced", right? : *shrug* *shrug* : anyway, i start with one p133, i think... : how well the current multiple cpu freebsd can take advantage from the : multiple cpus? i heard that the new nt4 will only hand max 40% advantage... NT is abismal when it comes to SMP... it's not worth comparing with anything. OS/2 is reported to run stuff faster on say a single P133 (no SMP support) than NT on a dual P133 ! FreeBSDs performance (as far as I know, but I'm not talking "authoritively") may give close to 100% improvement - but it really depends on your application. If you've got a lot of user- level cpu intensive code you'll get max benefit. If you've got lots of kernel-level code, the benefit will be reduced. : how about the cache? i know my compiling time went down 24% on single : cpu... from 256 async to 512 pb, with p133... The PPro has gotta be better ! -- Brian <brian@awfulhak.demon.co.uk> Don't _EVER_ lose your sense of humour....