diff options
| author | Jacob Pan <jacob.jun.pan@linux.intel.com> | 2016-11-29 00:44:52 +0300 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2016-11-30 01:34:11 +0300 |
| commit | feb6cd6a0f9f7d214351624d79e408cb2af91631 (patch) | |
| tree | f3b93ba4f06bb5b5288407c29c1ff4db0812636c /drivers/thermal/intel_powerclamp.c | |
| parent | cb91fef1b71954e3edc79fb4171b43f6aa2028c7 (diff) | |
| download | linux-feb6cd6a0f9f7d214351624d79e408cb2af91631.tar.xz | |
thermal/intel_powerclamp: stop sched tick in forced idle
With the introduction of play_idle(), idle injection kthread can
go through the normal idle task processing to get correct accounting
and turn off scheduler tick when possible.
Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/thermal/intel_powerclamp.c')
| -rw-r--r-- | drivers/thermal/intel_powerclamp.c | 35 |
1 files changed, 1 insertions, 34 deletions
diff --git a/drivers/thermal/intel_powerclamp.c b/drivers/thermal/intel_powerclamp.c index c99af71c0ae7..6d93f1d65dba 100644 --- a/drivers/thermal/intel_powerclamp.c +++ b/drivers/thermal/intel_powerclamp.c @@ -92,7 +92,6 @@ struct powerclamp_worker_data { struct kthread_worker *worker; struct kthread_work balancing_work; struct kthread_delayed_work idle_injection_work; - struct timer_list wakeup_timer; unsigned int cpu; unsigned int count; unsigned int guard; @@ -277,11 +276,6 @@ static u64 pkg_state_counter(void) return count; } -static void noop_timer(unsigned long foo) -{ - /* empty... just the fact that we get the interrupt wakes us up */ -} - static unsigned int get_compensation(int ratio) { unsigned int comp = 0; @@ -431,7 +425,6 @@ static void clamp_balancing_func(struct kthread_work *work) static void clamp_idle_injection_func(struct kthread_work *work) { struct powerclamp_worker_data *w_data; - unsigned long target_jiffies; w_data = container_of(work, struct powerclamp_worker_data, idle_injection_work.work); @@ -452,31 +445,7 @@ static void clamp_idle_injection_func(struct kthread_work *work) if (should_skip) goto balance; - target_jiffies = jiffies + w_data->duration_jiffies; - mod_timer(&w_data->wakeup_timer, target_jiffies); - if (unlikely(local_softirq_pending())) - goto balance; - /* - * stop tick sched during idle time, interrupts are still - * allowed. thus jiffies are updated properly. - */ - preempt_disable(); - /* mwait until target jiffies is reached */ - while (time_before(jiffies, target_jiffies)) { - unsigned long ecx = 1; - unsigned long eax = target_mwait; - - /* - * REVISIT: may call enter_idle() to notify drivers who - * can save power during cpu idle. same for exit_idle() - */ - local_touch_nmi(); - stop_critical_timings(); - mwait_idle_with_hints(eax, ecx); - start_critical_timings(); - atomic_inc(&idle_wakeup_counter); - } - preempt_enable(); + play_idle(jiffies_to_msecs(w_data->duration_jiffies)); balance: if (clamping && w_data->clamping && cpu_online(w_data->cpu)) @@ -538,7 +507,6 @@ static void start_power_clamp_worker(unsigned long cpu) w_data->cpu = cpu; w_data->clamping = true; set_bit(cpu, cpu_clamping_mask); - setup_timer(&w_data->wakeup_timer, noop_timer, 0); sched_setscheduler(worker->task, SCHED_FIFO, &sparam); kthread_init_work(&w_data->balancing_work, clamp_balancing_func); kthread_init_delayed_work(&w_data->idle_injection_work, @@ -570,7 +538,6 @@ static void stop_power_clamp_worker(unsigned long cpu) * a big deal. The balancing work is fast and destroy kthread * will wait for it. */ - del_timer_sync(&w_data->wakeup_timer); clear_bit(w_data->cpu, cpu_clamping_mask); kthread_destroy_worker(w_data->worker); |