Messages in this thread | | | Date | Mon, 22 Feb 2016 20:32:13 +0530 | From | Shreyas B Prabhu <> | Subject | Re: [PATCH V3 2/2] sched: idle: IRQ based next prediction for idle period |
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Hi Daniel,
On 02/16/2016 09:13 PM, Daniel Lezcano wrote: > + > +/** > + * sched_idle_next_wakeup - Predict the next wakeup on the current cpu > + * > + * The next event on the cpu is based on a statistic approach of the > + * interrupt events and the timer deterministic value. From the timer > + * or the irqs, we return the one expected to occur first. > + * > + * Returns the expected remaining idle time before being woken up by > + * an interruption. > + */ > +s64 sched_idle_next_wakeup(void) > +{ > + s64 next_timer = ktime_to_us(tick_nohz_get_sleep_length()); > + s64 next_irq = next_irq_event();
Since next_irq_event() uses RCU and we are in idle this should probably be wrapped in RCU_NONIDLE().
> + > + return min(next_irq, next_timer); > +} > +
Thanks, Shreyas
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