Article View: comp.sys.sequent
Article #900Re: timing parallel programs
From: David Haynes
Date: Fri, 16 Feb 1990 02:25
Date: Fri, 16 Feb 1990 02:25
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1517 bytes
peralta@pinocchio.Encore.COM (Rick Peralta) writes:
>In article luis@octopus.tds.kth.se (Luis Barriga) writes:
>>
>>2) I have read about a system call "getrusage" that gives info about
>>resource utilization: system, user time consumed, and other stuff. Is
>>there any problem using it?
>It should be fine, just as long as you peek at it at the beginning and
>end of your timing runs. Otherwise you will get a little startup cost
>into the overall measurements. BTW: you'll need to sync the starts.
There was some work done at the University of Western Ontario utilizing
a program called "gun" which provided synchronized starts. The basic
strategy, as it was explained to me, involved having the processes watch
a memory location to see a change of state.
-david-
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David Haynes Sequent Computer Systems (Canada) Ltd.
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!torsqnt!david From: david@torsqnt.UUCP (David Haynes) Newsgroups: comp.sys.sequent Subject: Re: timing parallel programs Message-ID: <978@torsqnt.UUCP> Date: 16 Feb 90 02:25:37 GMT References: <1324@csisles.Bristol.AC.UK> <1803@baird.cs.strath.ac.uk> <LUIS.90Feb15104438@molly.octopus.tds.kth.se> <11171@encore.Encore.COM> Organization: Sequent Computers (Canada) Ltd., Toronto, CANADA Lines: 23