mirror of https://gitee.com/openkylin/linux.git
governors: unify last_state_idx
Since this field is shared by all governors, move it to cpuidle device structure. Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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259231a045
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@ -38,7 +38,6 @@ struct ladder_device_state {
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struct ladder_device {
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struct ladder_device_state states[CPUIDLE_STATE_MAX];
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int last_state_idx;
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};
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static DEFINE_PER_CPU(struct ladder_device, ladder_devices);
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@ -49,12 +48,13 @@ static DEFINE_PER_CPU(struct ladder_device, ladder_devices);
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* @old_idx: the current state index
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* @new_idx: the new target state index
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*/
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static inline void ladder_do_selection(struct ladder_device *ldev,
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static inline void ladder_do_selection(struct cpuidle_device *dev,
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struct ladder_device *ldev,
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int old_idx, int new_idx)
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{
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ldev->states[old_idx].stats.promotion_count = 0;
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ldev->states[old_idx].stats.demotion_count = 0;
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ldev->last_state_idx = new_idx;
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dev->last_state_idx = new_idx;
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}
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/**
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@ -68,13 +68,13 @@ static int ladder_select_state(struct cpuidle_driver *drv,
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{
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struct ladder_device *ldev = this_cpu_ptr(&ladder_devices);
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struct ladder_device_state *last_state;
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int last_residency, last_idx = ldev->last_state_idx;
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int last_residency, last_idx = dev->last_state_idx;
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int first_idx = drv->states[0].flags & CPUIDLE_FLAG_POLLING ? 1 : 0;
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int latency_req = cpuidle_governor_latency_req(dev->cpu);
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/* Special case when user has set very strict latency requirement */
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if (unlikely(latency_req == 0)) {
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ladder_do_selection(ldev, last_idx, 0);
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ladder_do_selection(dev, ldev, last_idx, 0);
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return 0;
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}
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@ -91,7 +91,7 @@ static int ladder_select_state(struct cpuidle_driver *drv,
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last_state->stats.promotion_count++;
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last_state->stats.demotion_count = 0;
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if (last_state->stats.promotion_count >= last_state->threshold.promotion_count) {
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ladder_do_selection(ldev, last_idx, last_idx + 1);
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ladder_do_selection(dev, ldev, last_idx, last_idx + 1);
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return last_idx + 1;
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}
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}
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@ -107,7 +107,7 @@ static int ladder_select_state(struct cpuidle_driver *drv,
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if (drv->states[i].exit_latency <= latency_req)
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break;
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}
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ladder_do_selection(ldev, last_idx, i);
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ladder_do_selection(dev, ldev, last_idx, i);
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return i;
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}
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@ -116,7 +116,7 @@ static int ladder_select_state(struct cpuidle_driver *drv,
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last_state->stats.demotion_count++;
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last_state->stats.promotion_count = 0;
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if (last_state->stats.demotion_count >= last_state->threshold.demotion_count) {
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ladder_do_selection(ldev, last_idx, last_idx - 1);
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ladder_do_selection(dev, ldev, last_idx, last_idx - 1);
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return last_idx - 1;
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}
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}
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@ -139,7 +139,7 @@ static int ladder_enable_device(struct cpuidle_driver *drv,
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struct ladder_device_state *lstate;
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struct cpuidle_state *state;
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ldev->last_state_idx = first_idx;
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dev->last_state_idx = first_idx;
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for (i = first_idx; i < drv->state_count; i++) {
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state = &drv->states[i];
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@ -167,9 +167,8 @@ static int ladder_enable_device(struct cpuidle_driver *drv,
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*/
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static void ladder_reflect(struct cpuidle_device *dev, int index)
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{
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struct ladder_device *ldev = this_cpu_ptr(&ladder_devices);
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if (index > 0)
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ldev->last_state_idx = index;
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dev->last_state_idx = index;
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}
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static struct cpuidle_governor ladder_governor = {
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@ -117,7 +117,6 @@
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*/
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struct menu_device {
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int last_state_idx;
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int needs_update;
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int tick_wakeup;
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@ -455,7 +454,7 @@ static void menu_reflect(struct cpuidle_device *dev, int index)
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{
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struct menu_device *data = this_cpu_ptr(&menu_devices);
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data->last_state_idx = index;
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dev->last_state_idx = index;
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data->needs_update = 1;
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data->tick_wakeup = tick_nohz_idle_got_tick();
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}
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@ -468,7 +467,7 @@ static void menu_reflect(struct cpuidle_device *dev, int index)
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static void menu_update(struct cpuidle_driver *drv, struct cpuidle_device *dev)
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{
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struct menu_device *data = this_cpu_ptr(&menu_devices);
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int last_idx = data->last_state_idx;
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int last_idx = dev->last_state_idx;
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struct cpuidle_state *target = &drv->states[last_idx];
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unsigned int measured_us;
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unsigned int new_factor;
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@ -96,7 +96,6 @@ struct teo_idle_state {
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* @time_span_ns: Time between idle state selection and post-wakeup update.
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* @sleep_length_ns: Time till the closest timer event (at the selection time).
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* @states: Idle states data corresponding to this CPU.
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* @last_state: Idle state entered by the CPU last time.
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* @interval_idx: Index of the most recent saved idle interval.
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* @intervals: Saved idle duration values.
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*/
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@ -104,7 +103,6 @@ struct teo_cpu {
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u64 time_span_ns;
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u64 sleep_length_ns;
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struct teo_idle_state states[CPUIDLE_STATE_MAX];
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int last_state;
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int interval_idx;
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unsigned int intervals[INTERVALS];
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};
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@ -130,7 +128,9 @@ static void teo_update(struct cpuidle_driver *drv, struct cpuidle_device *dev)
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*/
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measured_us = sleep_length_us;
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} else {
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unsigned int lat = drv->states[cpu_data->last_state].exit_latency;
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unsigned int lat;
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lat = drv->states[dev->last_state_idx].exit_latency;
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measured_us = ktime_to_us(cpu_data->time_span_ns);
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/*
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@ -245,9 +245,9 @@ static int teo_select(struct cpuidle_driver *drv, struct cpuidle_device *dev,
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int max_early_idx, idx, i;
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ktime_t delta_tick;
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if (cpu_data->last_state >= 0) {
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if (dev->last_state_idx >= 0) {
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teo_update(drv, dev);
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cpu_data->last_state = -1;
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dev->last_state_idx = -1;
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}
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cpu_data->time_span_ns = local_clock();
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@ -394,7 +394,7 @@ static void teo_reflect(struct cpuidle_device *dev, int state)
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{
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struct teo_cpu *cpu_data = per_cpu_ptr(&teo_cpus, dev->cpu);
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cpu_data->last_state = state;
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dev->last_state_idx = state;
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/*
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* If the wakeup was not "natural", but triggered by one of the safety
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* nets, assume that the CPU might have been idle for the entire sleep
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@ -85,6 +85,7 @@ struct cpuidle_device {
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unsigned int cpu;
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ktime_t next_hrtimer;
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int last_state_idx;
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int last_residency;
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u64 poll_limit_ns;
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struct cpuidle_state_usage states_usage[CPUIDLE_STATE_MAX];
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