Re: PREEMPT_RT_FULL breaks NO_HZ_FULL (full dynticks)

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On 2018-08-31 18:30:19 [-0500], Julia Cartwright wrote:
> On Fri, Aug 31, 2018 at 06:31:52PM +0200, Sebastian Andrzej Siewior wrote:
> > On 2018-08-31 01:18:20 [-0700], Ramesh Thomas wrote:
> [..]
> > > 2. Timer is armed even though only a single high priority task is running.
> > 
> > something must have armed that timer. The clock_nanosleep() API won't
> > use those new threads but for instance timer_create() / timer_settime()
> > will.
> 
> Did we actually ever solve the "ktimersoftd uselessly woken on every
> tick" problem?

I think so, yes. According to the report the problem does not happen the
first invocation. However the "ktimersoftd uselessly woken on every
tick" problem occurred "always".

>    Julia

Sebastian



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