On Wed, Dec 02, 2015 at 01:53:39PM +0100, Peter Zijlstra wrote: > On Fri, Nov 13, 2015 at 03:22:06PM +0100, Frederic Weisbecker wrote: > > In order to evaluate tick dependency, we need to account SCHED_RR and > > SCHED_FIFO tasks separately as those policies don't have the same > > preemption requirements. > > > > We still keep rt_nr_running as a cache to avoid additions between nr_rr > > and nr_fifo all over the place. > > In which case you only need one of nr_fifo/nr_rr. Less accounting is > better. > > Pick the one you need for the nohz_full condition, and leave the other. > A quick look at sched_can_stop_tick() seems to suggest nr_rr is the > interesting one. nr_rr < 2 should allow stopping the tick.
Sounds pretty good! I'm going to do that! Thanks! -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
