Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!ncar!mephisto!prism!roy@lorien.gatech.edu
From: roy@lorien.gatech.edu (Roy Mongiovi)
Newsgroups: comp.sys.next
Subject: New performance monitor
Message-ID: <4289@hydra.gatech.EDU>
Date: 11 Dec 89 17:59:22 GMT
Sender: news@prism.gatech.EDU
Reply-To: roy@lorien.gatech.edu (Roy Mongiovi)
Organization: Georgia Institute of Technology
Lines: 28

A performance monitor (called, originally enough Monitor) is now available
from the archives at cc.purdue.edu (and possibly others by now).  It can
display up to 30 different statistics and combinations of statistics in a
window, plus one statistic (or combination) in the icon, so it's kind of a
combination of Sun's perfmon and perfmeter.

I developed this without access to the Mach source, so some of the meanings
that I have attributed to statistics are conjecture, but I've compared the
monitor with the results of vm_stat, iostat, etc. so at least they are
educated guesses.

I've put quite a bit of effort into making the impact the monitor has on the
system minimal, but when it has to scroll all the graphs it causes a second
or two pause in display updating.  If anyone has any ideas how to improve this,
I'd love to hear about it.

Please let me know if you find any problems with the statistics, or if you
have improvements for the code or suggested enhancements.  One of the ideas
I was toying with was to be able to point to a place on one of the graphs and
have it display the actual value at that position in the graph numerically.
Since that would take some effort to avoid having the mousedown handling code
significantly degrade the updating of the display, and since I don't have the
1.0 technical manuals yet, I decided to post before attempting that....

Roy J. Mongiovi     Systems Support Specialist     Office of Computing Services
Georgia Institute of Technology	  Atlanta, Georgia  30332-0275   (404) 894-4660
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