Date: Sun, 9 Feb 1997 23:12:35 +1100 (EST) From: Douglas Thomas Crosher <dtc@scrooge.ee.swin.oz.au> To: FreeBSD-gnats-submit@freebsd.org Subject: kern/2697: Possible getrusage time slip? Message-ID: <199702091212.XAA01650@scrooge.ee.swin.oz.au> Resent-Message-ID: <199702091220.EAA14197@freefall.freebsd.org>
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>Number: 2697
>Category: kern
>Synopsis: Possible getrusage time slip?
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: freebsd-bugs
>State: open
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Sun Feb 9 04:20:01 PST 1997
>Last-Modified:
>Originator: Douglas
>Organization:
Swinburne University of Technology
>Release: FreeBSD 3.0-CURRENT i386
>Environment:
P133 64M FreeBSD current 8/2/97
>Description:
Note sure if the behaviour of getrusage is correct, the times
reported often slip backwards? Caused a profiler trouble.
>How-To-Repeat:
#include <stdio.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/resource.h>
main()
{
for (;;) {
struct rusage rusage1, rusage2;
int time1,time2;
getrusage(RUSAGE_SELF,&rusage1);
time1 = rusage1.ru_utime.tv_sec * 1000000 + rusage1.ru_utime.tv_usec;
getrusage(RUSAGE_SELF,&rusage2);
time2 = rusage2.ru_utime.tv_sec * 1000000 + rusage2.ru_utime.tv_usec;
if (time2<time1)
fprintf(stderr," %x < %x\n", time2, time1);
}
}
>Fix:
>Audit-Trail:
>Unformatted:
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