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Path: euryale.cc.adfa.oz.au!newshost.anu.edu.au!harbinger.cc.monash.edu.au!news.cs.su.oz.au!metro!metro!munnari.OZ.AU!news.ecn.uoknor.edu!news.ysu.edu!usenet.ins.cwru.edu!agate!howland.reston.ans.net!swrinde!newsfeed.internetmci.com!in1.uu.net!svc.portal.com!news1.best.com!nntp1.best.com!shellx.best.com!not-for-mail From: rcarter@shellx.best.com (Russell Carter) Newsgroups: comp.unix.bsd.freebsd.misc Subject: Re: ALR Pentium Pro and FreeBSD? Date: 3 May 1996 11:41:05 -0700 Organization: Best Internet Communications Lines: 53 Message-ID: <4mdk01$7vr@shellx.best.com> References: <4m5u4b$f1d@news.service.uci.edu> <DqpGnK.7DE@ritz.mordor.com> <4mat1c$qpu@shellx.best.com> <Dqsp97.J59@ritz.mordor.com> NNTP-Posting-Host: shellx.best.com In article <Dqsp97.J59@ritz.mordor.com>, Chris Mauritz <ritz@ritz.mordor.com> wrote: >Russell Carter (rcarter@shellx.best.com) wrote: >: In article <DqpGnK.7DE@ritz.mordor.com>, >: Chris Mauritz <ritz@ritz.mordor.com> wrote: >: >Sam Sapoznick (ssapozni@photon.lib.uci.edu) wrote: >: >: I'd like to buy an ALR Evolution Dual6 Pentium Pro to run FreeBSD on. Has any >: >: one used ALR Pentium Pro-class machines to run FreeBSD? Are there any >: >: general conflicts between FreeBSD and the P6? >: >: >: >: Here are more specific specs. >: >: >: >: The Dual 6 comes with one processor, with a slot for a second processor. Can >: >: FreeBSD use the second processor efficiently, or at all? >: >: >: >: The chipset is Intel 82450KX (OrionDT) PCI. >: >: BIOS is Phoenix Upgradeable Flash BIOS >: >: >: >: Thanks very much. >: > >: >Unless Intel is shipping fixed orion chipsets you're going to find >: >yourself limited to about 4mb/sec of cpu to memory bandwidth...yech. >: ^^^^^^^^^^^^^ >: PCI controller to memory > >Oops. However, it is effectively the same since the PCI controller >sits between the cpu and non-cache memory, right? Oops, I was vague. PCI controller card. Memory bandwidth is affected quite a bit by the same chipset, but is still about 40 MB/s for writes and over 100 MB/s for reads. Triton I is about 80 and 80, for instance. The reason most benchmarks don't detect the memory bandwidth slowdown is because they run primarily out of cache, and the P6 second level cache is very very good. Not that any of this appears to have affected sales. NT is an excellent method to slow down any hardware, and that's what P6s are being sold for. Russell > >Cheers, > >Chris >-- >Christopher Mauritz | For info on internet access: >ritz@mordor.com | finger/mail info@ritz.mordor.com OR >Mordor International | http://www.mordor.com/ >201/212/718 internet access | Modem: (201)433-7343,(212)843-3451