Stefan Krah <[EMAIL PROTECTED]> writes:
> Otto Moerbeek <[EMAIL PROTECTED]> wrote:
> > On Tue, 9 Jan 2007, Stefan Krah wrote:
> >
> > > Hello,
> > >
> > > it seems that the interval timer is incorrect for a process that is
> > > started _after_ a sudden date change. Could someone reproduce this
> > > before I report it as a bug? System is OpenBSD 4.0-stable, i386.
> >
> > You already reported it. This is a bug. Try this diff from art@
>
> Tested it with several kinds of date changes and things work
> as they should. Thanks for the quick fix!
Committed. Thanks for the report and test.
//art
>
>
> Stefan
>
>
> >
> > -Otto
> >
> > Index: kern_time.c
> > ===================================================================
> > RCS file: /cvs/src/sys/kern/kern_time.c,v
> > retrieving revision 1.60
> > diff -u -r1.60 kern_time.c
> > --- kern_time.c 30 Oct 2006 20:19:33 -0000 1.60
> > +++ kern_time.c 9 Jan 2007 16:42:30 -0000
> > @@ -550,7 +550,7 @@
> > if (SCARG(uap, which) == ITIMER_REAL) {
> > struct timeval now;
> >
> > - getmicrotime(&now);
> > + getmicrouptime(&now);
> > /*
> > * Convert from absolute to relative time in .it_value
> > * part of real time timer. If time for real time timer
> >
> > >
> > >
> > > Here are the steps (program below):
> > >
> > >
> > > # ./timertest
> > >
> > > 0 0 600 0
> > > 0 0 598 990000
> > > 0 0 597 980000
> > > 0 0 596 970000
> > > 0 0 595 960000
> > > ^C
> > > # date
> > > Tue Jan 9 15:18:23 CET 2007
> > > # date 1522
> > > Tue Jan 9 15:22:00 CET 2007
> > > #
> > > #
> > > # ./timertest
> > > 0 0 389 610000
> > > 0 0 388 600000
> > > 0 0 387 590000
> > > 0 0 386 580000
> > >
> > >
> > > timertest.c
> > > =======================================================================
> > > #include <sys/time.h>
> > >
> > > #include <stdio.h>
> > > #include <stdlib.h>
> > > #include <unistd.h>
> > >
> > >
> > > int main(void)
> > > {
> > >
> > > struct itimerval itimer = {{0, 0}, {600, 0}};
> > >
> > >
> > > if (setitimer(ITIMER_REAL, &itimer, (struct itimerval *)NULL)) {
> > > puts("setting itimer failed\n");
> > > exit(1);
> > > }
> > >
> > > while (1) {
> > > getitimer(ITIMER_REAL, &itimer);
> > > printf( "%ld %ld %ld %ld\n", itimer.it_interval.tv_sec,
> > > itimer.it_interval.tv_usec,
> > > itimer.it_value.tv_sec,
> > > itimer.it_value.tv_usec );
> > > sleep(1);
> > > }
> > >
> > > return 0;
> > > }
> > > =======================================================================
> > >
> > >
> > > Stefan Krah
