Re: [Xenomai-core] Patch selection by prepare-kernel.sh (again)

2008-01-22 Thread Gilles Chanteperdrix
On Jan 22, 2008 5:23 PM, Philippe Gerum [EMAIL PROTECTED] wrote: Jan Kiszka wrote: Jan Kiszka wrote: Jan Kiszka wrote: Philippe, what was the idea behind commit #3256 [1]? It breaks the original behavior of selection adeos-ipipe-2.6.23-... in the presence of 2.6.23.x - and leaves a

Re: [Xenomai-core] High latencies on ARM.

2008-01-22 Thread Gilles Chanteperdrix
Gilles Chanteperdrix wrote: Please find attached a patch implementing these ideas. This adds some clutter, which I would be happy to reduce. Better ideas are welcome. Ok. New version of the patch, this time split in two parts, should hopefully make it more readable. - avoid

Re: [Xenomai-core] High latencies on ARM.

2008-01-22 Thread Gilles Chanteperdrix
Gilles Chanteperdrix wrote: Hi, after some (unsuccessful) time trying to instrument the code in a way that does not change the latency results completely, I found the reason for the high latency with latency -t 1 and latency -t 2 on ARM. So, here comes an update on this issue. The

Re: [Xenomai-core] Questions about Xenomai

2008-01-22 Thread Gilles Chanteperdrix
Jose Augusto Matos Santos wrote: Hi, I would like to understand Xenomai's scheduler and it will be a pleasure if you recomend me something to read. There are two things you can read: - the source, yes, sorry, but this is the best documentation; fortunately, Xenomai scheduler is way

Re: [Xenomai-core] High latencies on ARM.

2008-01-22 Thread Jan Kiszka
Gilles Chanteperdrix wrote: Gilles Chanteperdrix wrote: Hi, after some (unsuccessful) time trying to instrument the code in a way that does not change the latency results completely, I found the reason for the high latency with latency -t 1 and latency -t 2 on ARM. So, here comes

Re: [Xenomai-core] High latencies on ARM.

2008-01-22 Thread Gilles Chanteperdrix
Jan Kiszka wrote: Gilles Chanteperdrix wrote: Gilles Chanteperdrix wrote: Hi, after some (unsuccessful) time trying to instrument the code in a way that does not change the latency results completely, I found the reason for the high latency with latency -t 1 and

Re: [Xenomai-core] High latencies on ARM.

2008-01-22 Thread Gilles Chanteperdrix
Jan Kiszka wrote: Does the patch improve ARM latencies already? Yes, it does. The (interrupt) latency goes from above 100us to 80us. This is not yet 50us, though. -- Gilles Chanteperdrix. ___