[25732] in Athena Bugs
sun4 9.2.28: athinfo
daemon@ATHENA.MIT.EDU (Jacob Morzinski)
Fri Jun 25 17:35:40 2004
Message-Id: <200406252135.i5PLZQlA025535@multics.mit.edu>
To: bugs@mit.edu
Date: Fri, 25 Jun 2004 17:35:26 -0400
From: "Jacob Morzinski" <jmorzins@mit.edu>
Errors-To: bugs-bounces@mit.edu
System name: multics.mit.edu
Type and version: UltraAX-i2 9.2.28 (with mkserv)
Display type: unknown
This is halfway between a bug and a suggestion...
The "cpuspeed" query in athinfo is slow, when querying Suns
for their information. Checking the athinfo.defs file, it
looks like it runs sysinfo and generates close to a thousand
lines of output, only to throw it all away by grepping for
a single line.
I don't pretend to understand sysinfo well, but is there any
reason not to use the "-class device" command line flags?
It only generates around 20 lines, runs much faster, and
still generates the lines that contain the cpuspeed info.
A comparison of times (on multics.mit.edu):
athena% time tcsh -f -c 'repeat 10 sysinfo > /dev/null'
16.60u 17.34s 0:46.49 73.0%
athena% time tcsh -f -c 'repeat 10 sysinfo -class device > /dev/null'
3.30u 10.20s 0:20.07 67.2%
My suggestion is that it may be worth changing athinfo.defs
to query cpuspeed using:
cpuspeed /usr/athena/bin/sysinfo -class device | grep MHz
Regards,
-Jacob
