On 08/25/2011 11:25 AM, suresh reddy wrote:
> Dear Giles,
It is Gilles.
>
> 1. taking timing results using rt_timer-tsc on pandaboard for a test program
> using xenomai native services.
>
> 2. taking timing results using gettimeofday on pandaboard for same test
> program using linuxthreads.
>
>
> Can i compare these two timing results ?
your system is likely using nptl, not linuxthreads. And clock_gettime
instead of gettimeofday will give you precision down to the nanosecond,
like rt_timer_tsc2ns.
But yes, you can compare the results, if you bear in mind that real-time
is about worst case latencies, so results obtained by running tests for
a few seconds or minutes on an idle machine are meaningless.
Also note that since Xenomai has a posix api, you can have the exact
same code running with and without xenomai.
--
Gilles.
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