Date: Fri, 30 Jan 1998 15:57:47 -0800 (PST) From: Simon Shapiro <shimon@simon-shapiro.org> To: Jaye Mathisen <mrcpu@cdsnet.net> Cc: current <current@FreeBSD.ORG>, Steve Passe <smp@csn.net>, Alex <garbanzo@hooked.net>, Jason Evans <jasone@canonware.com> Subject: Re: -current, goliath, smp -- problems Message-ID: <XFMail.980130155747.shimon@simon-shapiro.org> In-Reply-To: <Pine.NEB.3.95.971211000539.14624R-100000@mail.cdsnet.net>
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On 11-Dec-97 Jaye Mathisen wrote: > > > On Tue, 9 Dec 1997, Jason Evans wrote: > >> On Mon, 8 Dec 1997, Alex wrote: >> in the neighborhood of 500 MB/sec, which is enough to feed 4 processors, >> but quite inadequate for 8. So, even though there are twice as many >> processors, the performance gain is not impressive. >> >> If there's anyone else out there that knows any better, please correct >> me. >> =) > > While I can't correct you, I have a couple DEC ZX6000's, that when using > the add-on memory boards, so there's something like 4GB of SIMMS, the > memory path becomes 256bit wide, 4 way interleaved, and runs at some > hellacious rate, and I remember the memory bandwidth being significantly > higher than 500MB/s. A number I remember for the P6 bus is 562MB/Sec, as far as the P6 bus is converned. Regardless of the DRAM memory bus itself. > > Heck, if somebody knows of some memory benchmarking software, I'd be > happy > to try it out. > ---------- Sincerely Yours, Simon Shapiro Shimon@Simon-Shapiro.ORG Voice: 503.799.2313
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