From mboxrd@z Thu Jan  1 00:00:00 1970
From: ke zhou <zhou_ke2001@domain.hid>
Date: Wed, 3 Aug 2011 08:39:25 +0000 (UTC)
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Subject: Re: [Xenomai-help] latency: failed to set periodic, code -110
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Gilles Chanteperdrix <gilles.chanteperdrix <at> xenomai.org> writes:

> 
> On 08/03/2011 06:09 AM, ke zhou wrote:
> > hello ,everyone!
> > I`m trying to patch the 2.6.25 kernel with Adeos Ipipe.And the xenomai
> > version is xenomai-2.4.4.tar.gz.
> > But when I execute " ./latency -t0 -T60 -p100 -h " on the s3c2440 
board,there 
> > are some errors : 
> > == Sampling period: 100 us
> > == Test mode: periodic user-mode task
> > == All results in microseconds
> > warming up...
> > latency: failed to set periodic, code -110
> > latency: failed to pend on semaphore, code -110
> > 
> > Any idea about that ?
> 
> The latencies on s3c24x will not allow you to run with a 100us period.
> Also, you should use xenomai 2.5.6.
> 


I`d tried to run with a 100000000us period or 10000000us ,that`s the same 
problem.Actually,the error was thrown out by rt_task_set_periodic
().Especially,when  I use rt_task_set_periodic() or rt_task_wait_period() in 
my program,they can`t return 0.
But I`ll try to use xenomai.2.5.6.
Thank you!