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Commit 0479c6b6 authored by Raghavendra Kakarla's avatar Raghavendra Kakarla
Browse files

cpuidle: lpm-levels: Store per core next hrtimer wakeup 



Currently next wakeup is stored per lpm_cpu domain which
have only last cpu's next wakeup. This overrides early
wakeups of previous cpus in the same domain.

Fix this by using per cpu next hrtimer.

Change-Id: Ic99e82cbb2a1b4eb6fa578b40045fab2bb22a557
Signed-off-by: default avatarRaghavendra Kakarla <rkakarla@codeaurora.org>
parent cbcfe29a

drivers/cpuidle/lpm-levels.c

+5 −4
Original line number Diff line number Diff line
@@ -101,6 +101,7 @@ struct ipi_history { 
	ktime_t cpu_idle_resched_ts;

};



static DEFINE_PER_CPU(ktime_t, next_hrtimer);

static DEFINE_PER_CPU(struct lpm_history, hist);

static DEFINE_PER_CPU(struct ipi_history, cpu_ipi_history);

static DEFINE_PER_CPU(struct lpm_cpu*, cpu_lpm);
@@ -264,7 +265,7 @@ static uint32_t get_next_event(struct lpm_cpu *cpu) 
		return 0;



	for_each_cpu(next_cpu, &cpu_lpm_mask) {

		ktime_t next_event_c = per_cpu(cpu_lpm, next_cpu)->next_hrtimer;

		ktime_t next_event_c = per_cpu(next_hrtimer, next_cpu);



		if (next_event > next_event_c)

			next_event = next_event_c;
@@ -775,7 +776,7 @@ static unsigned int get_next_online_cpu(bool from_idle) 
		return next_cpu;

	next_event = KTIME_MAX;

	for_each_online_cpu(cpu) {

		ktime_t next_event_c = per_cpu(cpu_lpm, cpu)->next_hrtimer;

		ktime_t next_event_c = per_cpu(next_hrtimer, cpu);



		if (next_event_c < next_event) {

			next_event = next_event_c;
@@ -802,7 +803,7 @@ static uint64_t get_cluster_sleep_time(struct lpm_cluster *cluster, 
			&cluster->num_children_in_sync, cpu_online_mask);



	for_each_cpu(cpu, &online_cpus_in_cluster) {

		ktime_t next_event_c = per_cpu(cpu_lpm, cpu)->next_hrtimer;

		ktime_t next_event_c = per_cpu(next_hrtimer, cpu);



		if (next_event_c < next_event)

			next_event = next_event_c;
@@ -1448,7 +1449,7 @@ static int lpm_cpuidle_enter(struct cpuidle_device *dev, 
	int ret = -EBUSY;



	/* Read the timer from the CPU that is entering idle */

	cpu->next_hrtimer = tick_nohz_get_next_hrtimer();

	per_cpu(next_hrtimer, dev->cpu) = tick_nohz_get_next_hrtimer();



	cpu_prepare(cpu, idx, true);

	cluster_prepare(cpu->parent, cpumask, idx, true, start_time);

drivers/cpuidle/lpm-levels.h

+0 −1
Original line number Diff line number Diff line
@@ -69,7 +69,6 @@ struct lpm_cpu { 
	uint64_t bias;

	struct cpuidle_driver *drv;

	struct lpm_cluster *parent;

	ktime_t next_hrtimer;

};



struct lpm_level_avail {