On Mon, Mar 3, 2008 at 1:48 PM, Philippe Gerum <[EMAIL PROTECTED]> wrote:
>
> Anders Blomdell wrote:
> > Philippe Gerum wrote:
> >> Anders Blomdell wrote:
> >>> Philippe Gerum wrote:
> >>>> Anders Blomdell wrote:
> >>>>> Gilles Chanteperdrix wrote:
> >>>>>> On Fri, Feb 29, 2008 at 5:54 PM, Anders Blomdell
> >>>>>> <[EMAIL PROTECTED]> wrote:
> >>>>>>> Hi,
> >>>>>>>
> >>>>>>> with xenomai 2.4.1 my call to:
> >>>>>>>
> >>>>>>> rt_cond_wait(&cond, &mutex, 1000);
> >>>>>>>
> >>>>>>> doesn't timeout (signalling works OK). Kernel version is 2.6.23.12,
> can it be
> >>>>>>> due to CONFIG_NO_HZ=y, or have I misunderstood something?
> >>>>>> What is your system timer setting ? Are you running in periodic or
> >>>>>> aperiodic mode ? If aperiodic, 1000 ticks means 1000 ns, that is 1us,
> >>>>>> so rt_cond_wait should return instantaneously.
> >>>>> OK, here comes a simplified program that just outputs A, and then
> hangs.
> >>>>>
> >>>> I can't reproduce this issue with your test code here, but this might be
> >>>> the sign of some timer race depending on how fast is the hw.
> >>>>
> >>>> By hanging, I assume the box is still ok, right?
> >>>> If so, could you please send the output of /proc/xenomai/stat,
> >>>> /proc/xenomai/sched, /proc/xenomai/timer and
> /proc/xenomai/timerstat/master?
> >>>>
> >>>> TIA,
> >>>>
> >>>> cat /proc/xenomai/stat
> >>> CPU PID MSW CSW PF STAT %CPU NAME
> >>> 0 0 0 108606586 0 00500080 100.0 ROOT/0
> >>> 0 0 0 54113426 0 00000082 0.0 rtnet-stack
> >>> 0 0 0 1 0 00000082 0.0 rtnet-rtpc
> >>> 0 22291 2 3 0 00300186 0.0 main
> >>> 0 0 0 107816863 0 00000000 0.0 IRQ22:
> rt_eepro100
> >>> 0 0 0 617309219 0 00000000 0.0 IRQ233: [timer]
> >>>
> >>>> cat /proc/xenomai/sched
> >>> CPU PID PRI PERIOD TIMEOUT TIMEBASE STAT NAME
> >>> 0 0 -1 0 0 master R ROOT/0
> >>> 0 0 98 0 0 master W
> rtnet-stack
> >>> 0 0 0 0 0 master W
> rtnet-rtpc
> >>> 0 22291 1 0 0 master w main
> >>>
> >>>> cat /proc/xenomai/timer
> >>>
> status=on+watchdog:setup=0:clock=8061167744254256:timerdev=lapic:clockdev=tsc
> >>>
> >>>> cat /proc/xenomai/timerstat/master
> >>> CPU SCHEDULED FIRED TIMEOUT INTERVAL HANDLER NAME
> >>> 0 1049107334 506070537 324149 - NULL
> [host-timer/0]
> >>> 0 3358790 3358789 662553305 1000000000 xnpod_watch
> [watchdog]
> >>> 0 1 1 - - xnthread_ti main
> >>>
> >>>
> >> Thanks. It looks like the timer did tick but the wakeup event was
> >> missed. The thread is still waiting for it (stat xxxxxxx6 means
> >> delayed+pending, which is the mode rt_cond_wait() sets for the thread).
> >> We do have a problem, it seems.
> >>
> > OK, what can I do to be of assistance?
> >
>
> Are you running the application over GDB?
Cannot this be that the constant (3) used in rthal_timer_program_shot
is a bit too small ?
--
Gilles Chanteperdrix
_______________________________________________
Xenomai-help mailing list
[email protected]
https://mail.gna.org/listinfo/xenomai-help
