Software performance

[jwr at scotty.UUCP]

References:

We are interested in help and/or recommendations pertaining 
to software performance monitoring tools.  Our knowledge and experience 
in this arena is limited.  One of our desired goals is to have the 
capability of determining the overhead (processing time) associated 
with the various modules of code to identify what processes are consuming 
the greatest amount of execution time.  Our initial attempt used the 
system time function and we have found it to be insufficient. It may 
partly be due to not totally understanding the terminology associated 
with the time function.  We are presently using SUN 3 machines running SUN 
UNIX 4.2 release 3.5.  Any help or advice in this area would be 
greatly appreciated.  Thanks!