Re: [Xenomai-core] rt timer jitter

2010-08-21 Thread Gilles Chanteperdrix
Krzysztof Błaszkowski wrote: > Do you have any idea about reducing rt timer jitter ? > I experience annoyingly big jitter in a thread which is supposed to run > at 400us (i reckon this is nothing extra demanding from atom @1.6G) > thread_task:2651 peak rt jitter -18470[ns], tsc delta 697450 > >

Re: [Xenomai-core] rt timer jitter

2010-08-20 Thread Philippe Gerum
On Fri, 2010-08-20 at 18:14 +0200, Krzysztof Błaszkowski wrote: > On Fri, 2010-08-20 at 18:01 +0200, Gilles Chanteperdrix wrote: > > Krzysztof Błaszkowski wrote: > > > Can i do something with this ? > > > > Do you observe the same latencies with the "latency" test? > > > > this test does not pro

Re: [Xenomai-core] rt timer jitter

2010-08-20 Thread Philippe Gerum
On Fri, 2010-08-20 at 18:20 +0200, Krzysztof Błaszkowski wrote: > On Fri, 2010-08-20 at 18:06 +0200, Philippe Gerum wrote: > > On Fri, 2010-08-20 at 17:55 +0200, Krzysztof Błaszkowski wrote: > > > Do you have any idea about reducing rt timer jitter ? > > > I experience annoyingly big jitter in a th

Re: [Xenomai-core] rt timer jitter

2010-08-20 Thread Krzysztof Błaszkowski
On Fri, 2010-08-20 at 18:06 +0200, Philippe Gerum wrote: > On Fri, 2010-08-20 at 17:55 +0200, Krzysztof Błaszkowski wrote: > > Do you have any idea about reducing rt timer jitter ? > > I experience annoyingly big jitter in a thread which is supposed to run > > at 400us (i reckon this is nothing ext

Re: [Xenomai-core] rt timer jitter

2010-08-20 Thread Krzysztof Błaszkowski
On Fri, 2010-08-20 at 18:01 +0200, Gilles Chanteperdrix wrote: > Krzysztof Błaszkowski wrote: > > Can i do something with this ? > > Do you observe the same latencies with the "latency" test? > this test does not produce reliable results except some hints. e.g. min. latency shifts about 1.5usec

Re: [Xenomai-core] rt timer jitter

2010-08-20 Thread Philippe Gerum
On Fri, 2010-08-20 at 17:55 +0200, Krzysztof Błaszkowski wrote: > Do you have any idea about reducing rt timer jitter ? > I experience annoyingly big jitter in a thread which is supposed to run > at 400us (i reckon this is nothing extra demanding from atom @1.6G) > > > the thread's loop looks lik

Re: [Xenomai-core] rt timer jitter

2010-08-20 Thread Gilles Chanteperdrix
Krzysztof Błaszkowski wrote: > Can i do something with this ? Do you observe the same latencies with the "latency" test? -- Gilles. ___ Xenomai-core mailing list Xenomai-core@gna.org https://mail.gna.org/l

Re: [Xenomai-core] rt timer jitter

2010-08-20 Thread Gilles Chanteperdrix
Krzysztof Błaszkowski wrote: > Can i do something with this ? Read TROUBLESHOOTING, FAQ, etc... -- Gilles. ___ Xenomai-core mailing list Xenomai-core@gna.org https://mail.gna.org/listinfo/xenomai-core