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Date: Thu, 23 Feb 2012 23:26:42 +0100
From: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
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Subject: Re: [Xenomai-help] Real-time printf in Xenomai 2.6.0
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To: Jeff Webb <jeff.webb@domain.hid>
Cc: Xenomai help <xenomai@xenomai.org>

On 02/23/2012 11:02 PM, Jeff Webb wrote:
> I was happy to see that printf now works from real-time POSIX threads in Xenomai 2.6.0.  Unfortunately, I'm seeing some strange behavior that surfaces when I try to print the string "\n" by itself.  When I run the attached example program, I get:
> 
>    $ ./printf_test
>    start
>    CPU time limit exceeded
>    $
> 
> IfI replace the two printf calls with rt_printf calls and #include <rtdk.h>,I get the expected result:
> 
>    $ ./rt_printf_test
>    start
>    1
>    2
>    3
>    4
>    ^C
>    $
> 
> The original example also works if these two lines:
> 
>          printf("%d", count);
>          printf("\n");
> 
> are replaced with:
> 
>          printf("%d\n", count);
> 
> Can someone confirm if this a bug in Xenomai 2.6.0, something specific to my HW/SW installation, or some mistake in my test program?

I would bet the call to printf is replaced with something else (such as
putchar). Could you disassemble the test to check this?

Note that I have fixed similar issues in xenomai-2.6 current repository,
so you could give it a try.

-- 
                                                                Gilles.