Re: [Xenomai-core] preemptive doesn't work

[Roberto Bielli <roberto.bielli@domain.hid>]

Hi Gilles,

we are sure that when a task execute NO INTERRUPTS arrives in interrupt 
service routine in assembler in the kernel,
until it sleeps. It's not a problem of secondary mode.

So we tried the same application on another porting of xenomai with 
marvell ( kernel 2.6.31.8 - xenomai always 2.5.6 ) and there is no problem.

We cannot change the kernel so we must find the problem in this version 
2.6.31 with xenomai 2.5.6 .
The patch of ipipe used is for 2.6.31.8 instead 2.6.31.
Is there a problem for this ? There are the hw locks (spin_lock, etc...) 
in the 2.6.31 that are different in 2.6.31.8 ?

I repeat that seems that all interrupt are disabled, as if there are 
some irq_enable/irq_disable when execute a task,
or the interrupt line is not acked.

The hw implementation of read/write/ack timer are correct.

Can you explain me how work the scheduler of xenomai compared with the 
tasks and the timer ?

Thanks for all.




Il 06/03/2012 17:16, Gilles Chanteperdrix ha scritto:
> On 03/06/2012 04:35 PM, Roberto Bielli wrote:
>> Hi Gilles,
>>
>> about T_WARNSW i see in the /proc/xenomai/stat that my task hasn't change mode (the value of MSW is 0 )
>> so, it hasn't changed in secondary mode.
> Or maybe it started in secondary mode and never switched mode?
>
>


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Roberto Bielli
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