Path: utzoo!attcan!uunet!husc6!mailrus!ames!elroy!cit-vax!mangler
From: mangler@cit-vax.Caltech.Edu (Don Speck)
Newsgroups: comp.arch
Subject: Re: register save/restore
Summary: cache effects
Message-ID: <8611@cit-vax.Caltech.Edu>
Date: 17 Nov 88 08:55:53 GMT
References: <3300037@m.cs.uiuc.edu> <1988Oct30.013510.16861@utzoo.uucp> <10723@cup.portal.com>
Organization: California Institute of Technology
Lines: 9

In article <10723@cup.portal.com>, bcase@cup.portal.com (Brian bcase Case) writes:
> Oh, yeah, I forgot:  smaller code is faster code.  Sigh.

On a machine with only a 4KB direct-mapped cache, this is TRUE.
My vax-750's spend 30% of their cycles in MEM STALL.  (The back
cover has a chart that shows where to find this pin).  That's
about one cache miss per instruction!

Has anybody tried putting larger cache RAM chips into a vax-750?