Path: utzoo!attcan!uunet!snorkelwacker!apple!mips!winchester!mash
From: mash@mips.COM (John Mashey)
Newsgroups: comp.arch
Subject: Re: Performance
Keywords: SPECmark Ratio, SPECthruput Ratio
Message-ID: <38414@mips.mips.COM>
Date: 1 May 90 17:45:45 GMT
References: <402@dg.dg.com> <406@dg.dg.com> <409@dg.dg.com> <38348@mips.mips.COM> <412@dg.dg.com>
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Reply-To: mash@mips.COM (John Mashey)
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In article <412@dg.dg.com> publius@dg-pag.webo.dg.com (Publius) writes:
>In article <38348@mips.mips.COM> mash@mips.COM (John Mashey) writes:

>SPEC benchmarks are more realistic programs than Dhrystone.  How can you
>explain the unexpected low SPECmark and SPECthruput of DECsystem 5810?

It's all in the memory system design, and for any serious info, somebody from
DEC would have to answer it. It is quite easy to lose a lot of performance
when matching an existing bus/memory system environment, but for the specific
details, somebody from DEC should post.  Whatever's going, the SPEC numbers
are probably reasonable indicators.

>Do you mean that the memory system of 5810 was designed in this manner?
>Then, how about other members in the DECsystem 5800 series?
I think so, but again, somebody from DEC...
-- 
-john mashey	DISCLAIMER: <generic disclaimer, I speak for me only, etc>
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