[Xenomai] Assertion failed on "test posix_clock" on some executions of xeno-test.

Andrea andrea.schiappacasse at camelotbio.com
Fri Apr 22 14:32:19 CEST 2016

Hi Philippe, thanks for your answer,

I ran autotune but the output didn't change, sometimes the assertion just
fails as before.
Do you think that it could lead to any problem in the standard Xenomai
usage? Or is it something that I may safely ignore? I didn't notice any
strange behaviour so far, but I'm wondering if this could be an indicator
of something going wrong in the system I'm testing.

Just in case it can be of any use, you can find attached the config of my

Thanks again for your kind support,


2016-04-22 11:06 GMT+02:00 Philippe Gerum <rpm at xenomai.org>:

> On 04/22/2016 10:51 AM, Andrea wrote:
>> Hello,
>> I'm currently using Xenomai 3.0.2, under kernel 4.1.8  with i-pipe patch.
>> I just noticed that I'm experiencing an error on some run of xeno-test.
>> The reported error is:
>> *posix-clock.c:420, assertion failed: diff < 1000000000*
>> */usr/xenomai/bin/smokey: test posix_clock failed: Invalid argument*
>> The specific function where the assert is issued in posix-clock.c is
>> "clock_decrease_after_periodic_timer_first_tick(void)"
>> On multiple executions it is not reproducible, I am wondering if anybody
>> could hint me to the source of the problem on my system.
> This test is highly time-dependent. Try running the autotuner
> (/usr/xenomai/bin/autotune) for calibrating the core timer with respect to
> system latencies prior to running the tests (aka "timer gravity" settings).
> --
> Philippe.
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