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 I

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

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

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 when i

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 extra

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 thread

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 produce reliable