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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?
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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: