On Mon, 2014-02-03 at 09:31 +0100, Sebastian Andrzej Siewior wrote:
> On 02/03/2014 05:00 AM, Mike Galbraith wrote:
> > On Sun, 2014-02-02 at 21:10 +0100, Sebastian Andrzej Siewior wrote:
> >
> >> According to the backtrace both of them are trying to access the
> >> per-cpu hrtimer (sched_timer)
On 02/03/2014 05:00 AM, Mike Galbraith wrote:
> On Sun, 2014-02-02 at 21:10 +0100, Sebastian Andrzej Siewior wrote:
>
>> According to the backtrace both of them are trying to access the
>> per-cpu hrtimer (sched_timer) in order to cancel but they seem to fail
>> to get the timer lock here. They sh
On Sun, 2014-02-02 at 21:10 +0100, Sebastian Andrzej Siewior wrote:
> According to the backtrace both of them are trying to access the
> per-cpu hrtimer (sched_timer) in order to cancel but they seem to fail
> to get the timer lock here. They shouldn't spin there for minutes, I
> have no idea why
On Sun, 2014-02-02 at 21:10 +0100, Sebastian Andrzej Siewior wrote:
> So CPU5 & CPU52 were eating 100% CPU doing "nothing" instead of running
> cc1 & objdump right?
Yeah.
> According to the backtrace both of them are trying to access the
> per-cpu hrtimer (sched_timer) in order to cancel but the
On 02/02/2014 05:22 AM, Mike Galbraith wrote:
> This patch (w. too noisy to live pr_err whacked) reliable kills my 64
> core test box, but only in _virgin_ 3.12-rt11. Add my local patches,
> and it runs and runs, happy as a clam. Odd. But whatever, box with
> virgin source running says it's bust
On Fri, 2014-01-31 at 15:34 +0100, Sebastian Andrzej Siewior wrote:
> irq_work is processed in softirq context on -RT because we want to avoid
> long latencies which might arise from processing lots of perf events.
> The noHZ-full mode requires its callback to be called from real hardirq
> context
irq_work is processed in softirq context on -RT because we want to avoid
long latencies which might arise from processing lots of perf events.
The noHZ-full mode requires its callback to be called from real hardirq
context (commit 76c24fb ("nohz: New APIs to re-evaluate the tick on full
dynticks CP
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