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| author | Sandeep Tripathy <sandeep.tripathy@linaro.org> | 2014-07-02 15:00:58 +0530 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2014-07-09 15:45:23 +0200 |
| commit | 30fe6884021b9fa0124609e898a6341be188eb44 (patch) | |
| tree | f8c7edee62a0c1b01622ccbcf1e166b368822c3d | |
| parent | cd3de83f147601356395b57a8673e9c5ff1e59d1 (diff) | |
| download | linux-30fe6884021b9fa0124609e898a6341be188eb44.tar.gz | |
cpuidle: move idle traces to cpuidle_enter_state()
idle_exit event is the first event after a core exits idle state. So this should be traced before local irq is ebabled. Likewise idle_entry is the last event before a core enters idle state. This will ease visualising the cpu idle state from kernel traces. Signed-off-by: Sandeep Tripathy <sandeep.tripathy@linaro.org> Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org> [rjw: Subject, rebase] Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
| -rw-r--r-- | drivers/cpuidle/cpuidle.c | 2 | ||||
| -rw-r--r-- | kernel/sched/idle.c | 4 |
2 files changed, 2 insertions, 4 deletions
diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c index cb7019977c50..ee9df5e3f5eb 100644 --- a/drivers/cpuidle/cpuidle.c +++ b/drivers/cpuidle/cpuidle.c @@ -119,11 +119,13 @@ int cpuidle_enter_state(struct cpuidle_device *dev, struct cpuidle_driver *drv, ktime_t time_start, time_end; s64 diff; + trace_cpu_idle_rcuidle(index, dev->cpu); time_start = ktime_get(); entered_state = target_state->enter(dev, drv, index); time_end = ktime_get(); + trace_cpu_idle_rcuidle(PWR_EVENT_EXIT, dev->cpu); if (!cpuidle_state_is_coupled(dev, drv, entered_state)) local_irq_enable(); diff --git a/kernel/sched/idle.c b/kernel/sched/idle.c index cf009fb0bc25..658a58dc30f4 100644 --- a/kernel/sched/idle.c +++ b/kernel/sched/idle.c @@ -147,8 +147,6 @@ use_default: clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_ENTER, &dev->cpu)) goto use_default; - trace_cpu_idle_rcuidle(next_state, dev->cpu); - /* * Enter the idle state previously returned by the governor decision. * This function will block until an interrupt occurs and will take @@ -156,8 +154,6 @@ use_default: */ entered_state = cpuidle_enter(drv, dev, next_state); - trace_cpu_idle_rcuidle(PWR_EVENT_EXIT, dev->cpu); - if (broadcast) clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_EXIT, &dev->cpu); |