Messages in this thread | | | Date | Mon, 10 Nov 2014 13:43:53 +0100 | From | Peter Zijlstra <> | Subject | Re: [PATCH V3 3/6] sched: idle: Get the next timer event and pass it the cpuidle framework |
| |
On Fri, Nov 07, 2014 at 03:31:24PM +0100, Daniel Lezcano wrote: > static void cpu_idle_loop(void) > { > - unsigned int latency_req; > + unsigned int latency_req, next_timer_event; > > while (1) { > /* > @@ -221,6 +222,9 @@ static void cpu_idle_loop(void) > > latency_req = pm_qos_request(PM_QOS_CPU_DMA_LATENCY); > > + next_timer_event = > + ktime_to_us(tick_nohz_get_sleep_length()); > + > /* > * In poll mode we reenable interrupts and spin. > * > @@ -238,7 +242,8 @@ static void cpu_idle_loop(void) > tick_check_broadcast_expired()) > cpu_idle_poll(); > else > - cpuidle_idle_call(latency_req); > + cpuidle_idle_call(latency_req, > + next_timer_event); > > arch_cpu_idle_exit(); > }
Why do we want to query the next timer in the poll case? Afaict the other patches don't make use of this either.
| |