From 39811569e43a81417bc0ddca3d0c7658c3dcd4b0 Mon Sep 17 00:00:00 2001 From: Punit Agrawal Date: Tue, 29 Jul 2014 11:50:49 +0100 Subject: [PATCH] thermal: trace: Trace when a cooling device's state is updated Introduce and use an event to trace when a cooling device's state is updated. This is useful to follow the effect of governor decisions on cooling devices. Cc: Zhang Rui Cc: Eduardo Valentin Cc: Steven Rostedt Cc: Frederic Weisbecker Cc: Ingo Molnar Signed-off-by: Punit Agrawal Signed-off-by: Eduardo Valentin --- drivers/thermal/thermal_core.c | 1 + include/trace/events/thermal.h | 19 +++++++++++++++++++ 2 files changed, 20 insertions(+) diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c index 6b32391..c74c78d 100644 --- a/drivers/thermal/thermal_core.c +++ b/drivers/thermal/thermal_core.c @@ -1291,6 +1291,7 @@ void thermal_cdev_update(struct thermal_cooling_device *cdev) mutex_unlock(&cdev->lock); cdev->ops->set_cur_state(cdev, target); cdev->updated = true; + trace_cdev_update(cdev, target); dev_dbg(&cdev->device, "set to state %lu\n", target); } EXPORT_SYMBOL(thermal_cdev_update); diff --git a/include/trace/events/thermal.h b/include/trace/events/thermal.h index 8c5ca96..894a79e 100644 --- a/include/trace/events/thermal.h +++ b/include/trace/events/thermal.h @@ -32,6 +32,25 @@ TRACE_EVENT(thermal_temperature, __entry->temp) ); +TRACE_EVENT(cdev_update, + + TP_PROTO(struct thermal_cooling_device *cdev, unsigned long target), + + TP_ARGS(cdev, target), + + TP_STRUCT__entry( + __string(type, cdev->type) + __field(unsigned long, target) + ), + + TP_fast_assign( + __assign_str(type, cdev->type); + __entry->target = target; + ), + + TP_printk("type=%s target=%lu", __get_str(type), __entry->target) +); + #endif /* _TRACE_THERMAL_H */ /* This part must be outside protection */ -- 2.7.4