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Second level cache?

To: riscy@pyramid.com (Mips 3000)
Subject: Second level cache?
From: Bill Broadley <broadley@neurocog.lrdc.pitt.edu>
Date: Mon, 9 Aug 1993 10:52:43 -0500 (EDT)
Reply-to: riscy@pyramid.com
Sender: owner-riscy@pyramid.com
Somebody mentioned that some research needs to be done on how a second level 
cache will effect performance.  Any suggestions on how to do this?

Based on observation it seems that a cache is worth it, SGI mips 4000 SC is
around 35/34 and the mips 4000 PC is around 60/58 specint/specfp.

Adding the decreased locality of Unix+X11 over dos, the higher (100 Mhz
internal) clock rate, and mips binaries being bigger then 486 it would
seem that a large secondary cache would be necessary.  Based on a 486's
secondary cache being useful.

Any suggestions on how to get some numbers experimentally?

I have a decstation 3100 running Ultrix, and a 486/66 running linux
available for any attempts to quantify the advantages of second level

Bill                                    1st>    Broadley@neurocog.lrdc.pitt.edu
Broadley@schneider3.lrdc.pitt.edu <2nd  3rd>                 Broadley+@pitt.edu
Linux is great.         Bike to live, live to bike.                      PGP-ok

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