Re: [Xenomai-help] more geode issues

[Philippe Gerum <rpm@xenomai.org>]

Steven Seeger wrote:
> I’m trying to get 2.6.23 to work with rc5. I’ve also tried trunk. I’m
> noticing the following behavior:
> 
>  
> 
> I’m using a geode GX1 board. The following relevant settings work with
> 2.6.22-2 and rc3:
> 
>  
> 
> Tickless system, one shot, TSC, geode 2cx200hr timer, and high res timers.
> 
>  
> 
> Everything is great with 2.6.22-2 and this config. The same settings on
> 2.6.23, however, yield an extremely fast blinking cursor in the
> framebuffer when xeno_nucleus is loaded. When xeno_native is loaded, the
> system runs fine except the timer interrupt is messed up for linux and
> the realtime tasks. A sleep 1 may take a couple minutes to return. If I
> switch to another VT and do a cat /lib/* or something, then it runs
> fine. I have a realtime task that acts as a sound driver.
>

Since you still have access to a shell, could you send the output of a
couple of "cat /proc/interrupts /proc/xenomai/irq" with roughly a
one-second delay between them? I'd like to know how many timer
interrupts are reported during this period.

>  
> 
> I’ve talked to Philippe about this problem privately, and there’s no
> real solution yet. I’m just posting it on the list now.
> 

It's a matter of being able to reproduce this behaviour, as usual. Your
.config for 2.6.23 would help too.

>  
> 
> Also, I’m having an issue with select() locking up the system with
> pipes. I saw there was a change made to pipe in trunk and am going to
> try and get that going with 2.6.22-2 now. If anyone knows anything about
> these two issues, please let me know.

The latest change is meant to have the real-time side receive a zero
byte count when the channel is closed by the Linux-side peer while
reading from it. I'll have a look at the select() issue once -rc6 is out.

--
Philippe.