Re: Rép. : Re: [Xenomai-help] Switch mode with x86

[Philippe Gerum <rpm@xenomai.org>]

On Sun, 2006-12-03 at 20:32 +0100, Jan Kiszka wrote:
> Nicolas BLANCHARD wrote:
> >>>>> "Nicolas BLANCHARD" <n.blanchard@domain.hid> 29.11 11:25 >>>
> >> Hello,
> >>
> >> I've tested wiith Xenomai 2.3-rc2 (adeos 1.5-02)
> >> and change the config : 
> >>                                        - CONFIG_M586
> >>                                        - disable CONFIG_INPUT_PCSPKR
> > (it was on module)
> >>                                        - disable prio boosting (check
> > CONFIG_XENO_OPT_RPDISALBLE)
> >> and it seems to work better, one hour without blocking, it's a record
> >> for me.
> >>
> >> So, i will investigate to find which modification improve my problem.
> > 
> > After somes tests (kernel compil), it seems that prio boost is
> > responsable of my
> > problem. When it's disable (kernel option checked) my program run
> > correctly.
> 
> Confirmed!
> 
> root@domain.hid :/root# cat /proc/xenomai/sched
> CPU  PID    PRI      PERIOD   TIMEOUT    STAT       NAME
>   0  0       99      0        0          R          ROOT
>   0  837     99      9999312  0          X          TASK1
>   0  838      0      10999998 0          R          TASK2
> 
> So far "only" on real hardware (P-I 133) with CONFIG_M586 and (this is
> likely also very important) CONFIG_PREEMPT. I'm now about to check if I
> can migrate this problem into qemu and/or capture it with the I-pipe tracer.
> 

Please also try moving task2 to the SCHED_FIFO class to see if things
evolve.

> Jan
> 
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-- 
Philippe.