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@
-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
