AW: Large latencies with 4.4.1-rt6

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Hi Josh,
> -----Ursprüngliche Nachricht-----
> Von: Josh Cartwright [mailto:joshc@xxxxxx]
> Gesendet: Donnerstag, 3. März 2016 16:42
> An: Wirth, Martin
> Cc: tglx@xxxxxxxxxxxxx; bigeasy@xxxxxxxxxxxxx; linux-rt-
> users@xxxxxxxxxxxxxxx
> Betreff: Re: AW: AW: Large latencies with 4.4.1-rt6
> 
> > > cyclictest -Sp99 -m -i200 -f -b500
> 
> Cyclictest should have mentioned which CPU was triggering the break, the
> most valuable traces are from that CPU.
> 

This one came from CPU 0

 
> Do you have more complete traces of what's going on on the other CPUs as
> well?  As far as I can see here, CPU0 is handling a couple interrupts, which
> trigger remote wakeups of irqthreads running on the other CPUs..nothing
> unusual?

To me it looked like the CPU kept IRQs disabled over the 100 µs, but it seems 
that this is a misinterpretation. 

The complete trace, including all CPUs, is about 12 MB (600 KB compressed) and
therefore  much too large for the mailing list. If anyone is interested to get the
complete file I will send it to his e-mail only.

Thanks,

Martin 
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