Re: 2.6.14-rt1 (now rt6)

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On 11/4/05, Fernando Lopez-Lezcano <[email protected]> wrote:
> On Sun, 2005-10-30 at 14:33 +0100, Ingo Molnar wrote:
> > i have released the 2.6.14-rt1 tree, which can be downloaded from the
> > usual place:
> >
> >    http://redhat.com/~mingo/realtime-preempt/
> >
> > this release is mainly about ktimer fixes: it updates to the latest
> > ktimer tree from Thomas Gleixner (which includes John Stultz's latest
> > GTOD tree), it fixes TSC synchronization problems on HT systems, and
> > updates the ktimers debugging code.
> >
> > These together could fix most of the timer warnings and annoyances
> > reported for 2.6.14-rc5-rt kernels. In particular the new
> > TSC-synchronization code could fix SMP systems: the upstream TSC
> > synchronization method is fine for 1 usec resolution, but it was not
> > good enough for 1 nsec resolution and likely caused the SMP bugs
> > reported by Fernando Lopez-Lezcano and Rui Nuno Capela.
> >
> > Please re-report any bugs that remain.
>
> I've been running 2.6.14-rt6 fine in my smp system the whole day and
> suddenly, just a moment ago, I suddenly started getting key repeats and
> screensaver bliiiinks [not my typo]. No HIGH_RES_TIMERS, with
> PREEMPT_RT. No messages in the logs or dmesg.

This sounds so familiar and similar to me, but with such a different
presentation. I ran about 15 hours yesterday with no xruns. Suddenly
at the end of the day I get about 8. I start up again this morning,
get two almost immediately, and then run the rest of the day with
none.

No HIGH_RES_TIMERS, with RT_PREEMPT.

Very strange.

Yesterday was 2.6.14-rt4. Today was -rt6.

- Mark
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