Re: [Xenomai-help] Adeos/Xenomai Arm Port

["Schlägl Manfred jun." <manfred.schlaegl@domain.hid>]

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Hi!

One problem I had was that I needet to set very high periode-values for
latency and switchbench.
I think I've found a solution.

1. I increased the granularity of the system-timer
I'm using full system-clock für the timer now, instead of
system-clock/64 so now I have 1769472 ticks per jiffy (instead of 27648)

2. There was a wrong value for CLOCK_TICK_RATE in timex.h I think.
It was set to 50000000 / 16 (by netsilicon), but it should be the hw
clock frequency (http://arm.nihilisme.ca/doc/aleph.pdf )
CLOCK_TICK_RATE is now set to 176947200.

Results:
I'm able to pass Periods about 200us and lower to latency and
switchbench now.



But the Problem with Latency-Test with in-kernel periodic tasks and
in-kernel timer handler exists further.

ioctl RTTST_RTIOC_INTERM_BENCH_RES is sent once in userspace
and received twice (by rt_tmbench_ioctl_rt and
rt_tmbench_ioctl_nrt) ... 
There is no such behavior on my x86 running these tests.

Now i'll try to check the communication between the rt-driver and the
userspace now and will report my results.


Greets
	Manfred



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