On Wed, 25 Oct 2006, Schlägl Manfred jun. wrote:
On Tue, 2006-10-24 at 12:49 +0200, Sebastian Smolorz wrote:
Hi all,
I'm currently working on porting I-pipe to the ARM S3C24xx. The patch is
attached, it must be applied after the shipped
adeos-ipipe-2.6.15-arm-1.5-01.patch. Unfortunately, there is still a severe
bug somewhere. I built Xenomai as modules. When I try to modprobe
xeno_native, the system hangs. No reaction at all, inlcuding serial console
and network access. I guess that interrupts are not handled any more. From
what I see if I spread some debug printk() into my code, the timer starts
working under the control of the Xenomai domain and one or two calls to the
Linux timer interrupt handler are made. But after that nothing happens any
more.
As I try to find the bug for some days now but wasn't successful maybe the
experts have any hints where to continue searching. Or perhaps there is
someone who can test it and confirm or disprove my observation? It would be
great to support one more ARM model.
Small update with new infos: After Xenomai has (re)started the system timer
the Linux timer interrupt handler ist called only once, but
xnintr_clock_handler() is called several thousand times. So it seems that the
timer interrupt handler of Linux is not properly called or Xenomai is
starving Linux.
Sebastian
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Hi. I had the same Problem on my Netsilicon board.
I changed my timer-clock from CPU_CLK/64 to CPU_CLK so Xenomai is able
to use it with a higher granularity (set_dec/get_dec). So my machine has
1769472 ticks per jiffy instead of 27648. (works only with 32bit timers)
Further I had to set CLOCK_TICK_RATE (/include/asm/arch-xxxx/timex.h) to
real cpu frequency (im my case around 176000000).
Now I'm able to run latency with periods > 200us
I think we have different problems. I will give a more detailed
description in a separate mail.
Sebastian
P.S. Why did you change the mailing list within a thread? :-)
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