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From: blinn@furilo.DEC.COM (Dr. Tom @ MRO3-3 pole T14, 297-5562)
Newsgroups: mod.computers.vax
Subject: Monitoring CPU usage inside a program
Message-ID: <8610312241.AA04225@decwrl.dec.com>
Date: Fri, 31-Oct-86 14:05:00 EST
Article-I.D.: decwrl.8610312241.AA04225
Posted: Fri Oct 31 14:05:00 1986
Date-Received: Mon, 3-Nov-86 20:58:43 EST
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Ruth Milner, VAX Systems Manager, Physics/Astronomy VAX Group, 
University of Toronto, writes:

> Does anybody out there know of a VMS utility (I can't find anything obvious)
> or a program they have written, which will monitor an executing image and
> produce statistics (e.g. histograms) on how much time it is spending on
> which portions of the program? 

The VAX Performance and Coverage Analyzer (PCA) does what you're looking
for.  It's a VMS layered product available for all VAX and microVAX systems
running VMS, and works with any language that supports the VAX Debugger.

It has two components, one of which is linked with your program to gather
data during the program's execution, and the other of which generates the
performance and coverage reports.  You can get information out in several
formats.

The VAX PCA is described by SPD # 26.76.nn, and is model number Q*119.

Tom Blinn
Volume Operations
Digital Equipment Corporation
Marlboro, MA 01752