Path: utzoo!utgpu!watserv1!watmath!maytag!watstat!dmurdoch
From: dmurdoch@watstat.waterloo.edu (Duncan Murdoch)
Newsgroups: comp.sys.ibm.pc
Subject: Re: Cache hit counter wanted:  SUMMARY
Message-ID: <1711@maytag.waterloo.edu>
Date: 13 Mar 90 19:02:26 GMT
References: <1641@maytag.waterloo.edu> <29381@amdcad.AMD.COM>
Sender: daemon@maytag.waterloo.edu
Reply-To: dmurdoch@watstat.waterloo.edu (Duncan Murdoch)
Organization: U. of Waterloo, Ontario
Lines: 19

A while ago I wrote:

>>I'd like to measure the performance of a couple of disk cache programs in real
>>use.  The obvious measurement as to how well they're performing is the number
>>of cache hits versus misses; however, neither of them keeps track.

and then asked for a general purpose hit counter.  I didn't find one (though
I was told that PCKwik (sp?) comes with one tailored to it), so I ended up
writing a simple one myself.  It comes in two versions:  a device driver
and a TSR.  Neither one does anything but hook to the BIOS disk read
interrupt and keep count of requests.  A third program looks through
memory for copies of the others, and reports what they've found.
Anyone who wants a copy please email me; I'll collect together responses
and mail out copies in a week or so.

By the way, I haven't done a detailed comparison yet, but MS SMARTDRV and
Mace MCACH-EM seem to perform about equally.

Duncan Murdoch