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From: anand@amax.npac.syr.edu (Anand Rangachari)
Newsgroups: comp.sys.encore
Subject: using /bin/time
Message-ID: <898@cmx.npac.syr.edu>
Date: 12 Dec 88 15:16:38 GMT
Sender: usenet@cmx.npac.syr.edu
Reply-To: anand@amax.npac.syr.edu (Anand Rangachari)
Organization: Northeast Parallel Architectures Center
Lines: 21


  While devloping and testing parallel programs on our Multimax, I
face a problem occasionally when measuring the running time of a 
parallel program (ie one that forks a number of processes).

In order to do a proper study of the running time it is of course
necessary to perform the tests on an unloaded machine. In a computing
center such as ours this is not always possible to find a time when there
are no other processes running.

To get around this, a friend suggested that I use /bin/time to measure
the user time (My program is 99% user mode). The question then is:
is it possible somehow to obtain the sum of the user times of each of the
processes I create in my program?

A suggestion to Encore: A useful feature would be to allow a suitably
privileged program to lock a number of processors for itself.

                                                     R. Anand

Internet: anand@amax.npac.syr.edu
Bitnet:   ranand@sunrise