Re: more cache/uncached ld/st

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Article #10436

#10436

From: Henry Spencer
Date: Wed, 24 Apr 1991 17:38

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In article <51903@apple.Apple.COM> baum@apple.com (Allen Baum) writes:
>> Anybody who caches a frame buffer is crazy...
>
>Not so. If you can use the burst transfer into the cache, and throw away the
>line (i.e. burst dump it) when finished, its a very large win...

If you can't use burst transfers except by trampling on your cache, your
processor-memory interface is defective.  (More precisely, it has been
optimized for the typical case without due consideration of important
atypical cases.)  Of course, if you're using your cache as a substitute
for having an adequate number of registers in your CPU, then you may
not have a choice...
-- 
And the bean-counter replied,           | Henry Spencer @ U of Toronto Zoology
"beans are more important".             |  henry@zoo.toronto.edu  utzoo!henry

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Message-ID: <1991Apr24.173843.13659@zoo.toronto.edu>

Path: arc1-ca.pugleaf.net!utzoo!henry

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<1991Apr15.193425.3436@waikato.ac.nz> <SPOT.91Apr18123711@WOOZLE.GRAPHICS.CS.CMU.EDU> <PUWA8R4@xds13.ferranti.com> <1991Apr23.053619.13474@kithrup.COM> <1991Apr23.152155.2298@zoo.toronto.edu> <51903@apple.Apple.COM>

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Newsgroups: comp.arch
Path: arc1-ca.pugleaf.net!utzoo!henry
From: henry@zoo.toronto.edu (Henry Spencer)
Subject: Re: more cache/uncached ld/st
Message-ID: <1991Apr24.173843.13659@zoo.toronto.edu>
Date: Wed, 24 Apr 1991 17:38:43 GMT
References: <1991Apr15.193425.3436@waikato.ac.nz> <SPOT.91Apr18123711@WOOZLE.GRAPHICS.CS.CMU.EDU> <PUWA8R4@xds13.ferranti.com> <1991Apr23.053619.13474@kithrup.COM> <1991Apr23.152155.2298@zoo.toronto.edu> <51903@apple.Apple.COM>
Organization: U of Toronto Zoology

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