Dear Gilles, Thanks for the reply . Yes , the real-time is about worst case latencies , iam running a script in background which will keep on downloading from network and removing the downloaded .Just to keep machine working.
Thanks Suresh On 25 August 2011 19:57, Gilles Chanteperdrix < [email protected]> wrote: > 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. > -- Suresh balijepalli Rosenehim,Baveria.
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