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

[Jan Kiszka <jan.kiszka@domain.hid>]

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Schlägl Manfred jun. wrote:
> 
> ------------------------------------------------------------------------
> 
> Betreff:
> Re: [Xenomai-help] Adeos/Xenomai Arm Port
> Von:
> Schlägl "Manfred jun." <manfred.schlaegl@domain.hid>
> Datum:
> Wed, 18 Oct 2006 17:15:09 +0200
> An:
> Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
> 
> An:
> Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
> 
> 
> On Wed, 2006-10-18 at 14:05 +0200, Gilles Chanteperdrix wrote:
> 
>> Some ARMs do not boot when spinlock debugging is enabled, so it would be
>> interesting to check if the error also occurs with I-pipe and Xenomai
>> off.
>>
> 
> You were right!
> 
> The kernel with active SPIN_DEBUG and without IPIPE doesn't boot (soft
> lockup).
> 
> But very interresting: Kernel with SPIN_DEBUG and IPIPE seems to run
> normally (with xenomai, but without xenomai apps).
> 
> Thanks
> 
> 
> ###############################################################################
> 
> Again Latency:
> 
> -sh-3.00#  time ./run -- -t 1 -p 1000 -T 10 
> *
> *
> * Type ^C to stop this application.
> *
> *
> Using /lib/modules/2.6.15.7/kernel/kernel/xenomai/nucleus/xeno_nucleus.ko
> Using /lib/modules/2.6.15.7/kernel/kernel/xenomai/skins/native/xeno_native.ko
> Using /lib/modules/2.6.15.7/kernel/kernel/xenomai/skins/rtdm/xeno_rtdm.ko
> Using /lib/modules/2.6.15.7/kernel/drivers/xenomai/testing/xeno_timerbench.ko
> == Sampling period: 1000 us
> == Test mode: in-kernel periodic task
> == All results in microseconds
> warming up...
> RTT|  00:00:01  (in-kernel periodic task, 1000 us period, priority 99)
> RTH|-----lat min|-----lat avg|-----lat max|-overrun|----lat best|---lat
> worst
> RTD|      11.680|      16.586|      36.126|       0|      11.680|
> 36.126
> RTD|      11.182|      17.092|      43.947|       0|      11.182|
> 43.947
> RTD|      11.521|      17.091|      65.411|       0|      11.182|
> 65.411
> RTD|      11.981|      17.116|      63.388|       0|      11.182|
> 65.411
> RTD|      11.919|      17.121|      66.767|       0|      11.182|
> 66.767
> RTD|      12.354|      17.178|      42.996|       0|      11.182|
> 66.767
> RTD|      11.884|      17.122|      66.315|       0|      11.182|
> 66.767
> RTD|      11.849|      17.132|      65.287|       0|      11.182|
> 66.767
> RTD|      11.578|      17.093|      66.824|       0|      11.182|
> 66.824
> ---|------------|------------|------------|--------|-------------------------
> RTS|-1095668.296|       0.001|      93.252|   93340|
> 00:00:10/00:00:10

Looks like you forgot to recompile the user space part after applying my
patch. It changes the ABI between the driver and the test tool, so both
sides have to be in sync.

> 
> real    0m17.730s
> user    0m0.840s
> sys     0m5.000s
> Time is running very slowly while running this test
> 0m17.730s on target, while 1m6 in reality
> 

Sounds like Linux is not getting (enough) timer IRQs. Check
/proc/interrupts for progress.

Jan


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