On Wed, 10 Jun 2015, Mike Galbraith wrote:
> On Wed, 2015-06-10 at 17:12 +0200, Thomas Gleixner wrote:
>
> > Some more information about your symptoms in form of configuration,
> > extra patches, kernel traces etc. would be appreciated.
>
> homer:~/tmp # perf record -C 3 -eirq:*,irq_vectors:local* -- sleep 10
> [ perf record: Woken up 2 times to write data ]
> [ perf record: Captured and wrote 1380.507 MB perf.data (19530595 samples) ]
> homer:~/tmp # perf script | grep irq_vectors:local_timer
> ksoftirqd/3 19 [003] 5586.564238: irq_vectors:local_timer_entry:
> vector=239
> ksoftirqd/3 19 [003] 5586.564239: irq_vectors:local_timer_exit:
> vector=239
> ksoftirqd/3 19 [003] 5586.568238: irq_vectors:local_timer_entry:
> vector=239
> ksoftirqd/3 19 [003] 5586.568239: irq_vectors:local_timer_exit:
> vector=239
> ksoftirqd/3 19 [003] 5586.632218: irq_vectors:local_timer_entry:
> vector=239
That gap is odd. Can you fire up the function tracer please?
Thanks,
tglx
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