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From: 9531sons@WISCVM.WISC.EDU
Newsgroups: comp.unix.wizards
Subject: CPU Accounting
Message-ID: <9737@brl-adm.ARPA>
Date: Mon, 12-Oct-87 21:26:43 EDT
Article-I.D.: brl-adm.9737
Posted: Mon Oct 12 21:26:43 1987
Date-Received: Wed, 14-Oct-87 02:10:46 EDT
Sender: news@brl-adm.ARPA
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I am moving from a PDP11/70 (running BSD 2.9) to a SUN 3/280 and am
moving my "old" accounting code.

Here, at UCSB, we charge UNIX users for CPU seconds and, in fact, have
three different CPU rates depending on which time of the day the
command was executed.  Several years ago I modified the BSD 2.8 program
"sa" to fit our local needs.  I installed the program on a SUN I have
found that lots of SUN commands seem to be executing is less than a
second!  I tried the same code on a neighboring VAX 11/780 (4.2 UNIX)
and the same thing seems to occur.  My results do match up with what
/etc/sa is producing, so if I'm missing values then I'd guess /etc/sa
(BSD 4.2) is also.

The acct structure contains two fields I am concerned with, ac_utime and
ac_stime, these values appear to (often) be 0.  Occasionally a good
nroff will generate a couple of seconds but for the most part we get
0.  Is the number of seconds in ac_utime and ac_stime accurate?

                                        Jamie Sonsini
                                        UC Santa Barbara