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From: kolstad@convex.UUCP
Newsgroups: net.bugs.4bsd
Subject: iostat overflows - (nf)
Message-ID: <33500005@convex.UUCP>
Date: Fri, 20-Apr-84 17:10:00 EST
Article-I.D.: convex.33500005
Posted: Fri Apr 20 17:10:00 1984
Date-Received: Sun, 22-Apr-84 09:08:03 EST
Lines: 16
Nf-ID: #N:convex:33500005:000:462
Nf-From: convex!kolstad    Apr 20 16:10:00 1984

#N:convex:33500005:000:462
convex!kolstad    Apr 20 16:10:00 1984

If your machine accumulates several days of idle time, iostat can report
a negative idle percentage.  This is due to an integer overflow in the
print statement which computes this percent.

Find the printf call in stat1 and notice that the conversion to floating
point is not done until the multiply by the (integer) 100.  This causes
the overflow sometimes.  Here's a new line which fixes the bug:

	printf("%3.0f", 100.0*s.cp_time[o]/time);

Cheers.

					Rob