summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorPunit Agrawal <punit.agrawal@arm.com>2014-07-29 14:50:49 +0400
committerEduardo Valentin <edubezval@gmail.com>2014-07-29 17:27:54 +0400
commit39811569e43a81417bc0ddca3d0c7658c3dcd4b0 (patch)
tree72f3375f4000c27ba0f15d0a88c64d5536c32a8d
parent100a8fdbf525bb11796692a713c267be6523a890 (diff)
downloadlinux-39811569e43a81417bc0ddca3d0c7658c3dcd4b0.tar.xz
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 <rui.zhang@intel.com> Cc: Eduardo Valentin <edubezval@gmail.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@redhat.com> Signed-off-by: Punit Agrawal <punit.agrawal@arm.com> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
-rw-r--r--drivers/thermal/thermal_core.c1
-rw-r--r--include/trace/events/thermal.h19
2 files changed, 20 insertions, 0 deletions
diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
index 6b32391260a0..c74c78d28699 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 8c5ca96eccd6..894a79ea0686 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 */