Messages in this thread | | | Subject | AW: clock_nanosleep: cyclic POSIX thread freezes during time setting | Date | Tue, 6 Oct 2009 11:00:45 +0200 | From | "Mehlan, Markus" <> |
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Hello Thomas,
> -----Ursprüngliche Nachricht----- > Von: Thomas Gleixner [mailto:tglx@linutronix.de] > Gesendet: Montag, 5. Oktober 2009 20:58 > An: Mehlan, Markus > Cc: linux-kernel@vger.kernel.org > Betreff: Re: clock_nanosleep: cyclic POSIX thread freezes > during time setting > > Markus, > > On Mon, 5 Oct 2009, Mehlan, Markus wrote: > > I have the following problem on a MPC5200b customer board, > tested with > > linux-2.6.24.7-rt11 and 2.6.26.8-rt16. > > > > I start the test application. Every 200ms I can see a new > line on the > > console ("ping"). Then I set the time with "date > 100509152009" a few > > times on a second console. The effect is that the output on > the first > > console freezes and if I check the time with "date", the > time doesn't > > progress during the "freeze time". After the "freeze time" the time > > makes a jump of several seconds. > > > > In the real application the "ping" should reset the watchdog-timer. > > The freezing causes an elapsing of the watchdog-timer and finally a > > reboot. > > > > Has someone an idea? > > Just tested on a MPC5200 board with cyclictest and setting > date on a second console. Unfortunately I cannot reproduce > that problem. Can you try to activate the function tracer and > capture what the system is doing. That might us give some > clue about the problem. > > Thanks, > > tglx > do you mean kernel function trace (KFT patch) with function trace or user space "strace"?
Thank you, Markus
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