Article View: comp.sys.ibm.pc.hardware
Article #19836Re: Advantage of 256Kb over 64Kb Cache with 386?
From: Marc WANDSCHNEIDER
Date: Mon, 11 Jan 1993 15:06
Date: Mon, 11 Jan 1993 15:06
25 lines
1611 bytes
1611 bytes
In article <C0nGtz.Mry@dutiws.twi.tudelft.nl> zonnevel@dutiws.twi.tudelft.nl (B.J.Zonneveld.tel-015-622622) writes:
>Hi, I want to know what the improvement is of using 256kb cache in
>stead of 64kb on my 384/40'er. Is it a noticeable speed improvement?
>If anyone has any experience or read something could you please
>email me personally.
Chances are, little.
Most 64k cache systems are going to have some 4 way set associative
caching scheme, for which 64k will be adequate, and 256k will only give you
a 2% improvement or so.
Many systems that come with 256k caches are direct mapped, which
is a REALLY sucky caching policy, but gives you similar performance to the
64k 4way sa cache just because it's 4 times bigger.
In other words, don't bother.
Toodlepip!
Marc 'em.
--
storm@cs.mcgill.ca McGill University "-- Attack ships on
Marc Wandschneider Montreal, CANADA fire "
Any opinions expressed are not mine, but those of the Demon Lord
Yeegeheeegenogohugu who possessed me whilst I munched on Raisin Bran.
Technical Details
Message-ID:
<C0p3Az.ArH@cs.mcgill.ca>Path:
arc1-ca.pugleaf.net!sparky!uunet!munnari.oz.au!spool.mu.edu!uwm.edu!rpi!utcsri!newsflash.concordia.ca!sifon!homer.cs.mcgill.ca!stormReferences:
<C0nGtz.Mry@dutiws.twi.tudelft.nl>Show Full Headers
Complete Article Headers
Newsgroups: comp.sys.ibm.pc.hardware Path: arc1-ca.pugleaf.net!sparky!uunet!munnari.oz.au!spool.mu.edu!uwm.edu!rpi!utcsri!newsflash.concordia.ca!sifon!homer.cs.mcgill.ca!storm From: storm@cs.mcgill.ca (Marc WANDSCHNEIDER) Subject: Re: Advantage of 256Kb over 64Kb Cache with 386? Message-ID: <C0p3Az.ArH@cs.mcgill.ca> Sender: news@cs.mcgill.ca (Netnews Administrator) Organization: SOCS - McGill University, Montreal, Canada References: <C0nGtz.Mry@dutiws.twi.tudelft.nl> Date: Mon, 11 Jan 1993 15:06:34 GMT Lines: 25