This patch add basic tracing of the devfreq workqueue and delayed work. It aims to capture changes of the polling intervals and device state.
Reviewed-by: Chanwoo Choi <[email protected]> Signed-off-by: Lukasz Luba <[email protected]> --- drivers/devfreq/devfreq.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c index 0ae3de7..c9714fd 100644 --- a/drivers/devfreq/devfreq.c +++ b/drivers/devfreq/devfreq.c @@ -29,6 +29,9 @@ #include <linux/of.h> #include "governor.h" +#define CREATE_TRACE_POINTS +#include <trace/events/devfreq.h> + static struct class *devfreq_class; /* @@ -394,6 +397,11 @@ static void devfreq_monitor(struct work_struct *work) queue_delayed_work(devfreq_wq, &devfreq->work, msecs_to_jiffies(devfreq->profile->polling_ms)); mutex_unlock(&devfreq->lock); + + trace_devfreq_monitor(dev_name(&devfreq->dev), devfreq->previous_freq, + devfreq->profile->polling_ms, + devfreq->last_status.busy_time, + devfreq->last_status.total_time); } /** -- 2.7.4
