cpuidle: Add last_residency trace event for residency profiling

erezak · Nov 4, 2012 · f3b369c · f3b369c
1 parent ab33883
commit f3b369c
Show file tree

Hide file tree

Showing 2 changed files with 25 additions and 0 deletions.
diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c
@@ -104,6 +104,7 @@ static void cpuidle_idle_call(void)
 
 	trace_power_end(dev->cpu);
 	trace_cpu_idle(PWR_EVENT_EXIT, dev->cpu);
+	trace_cpu_residency(dev->last_residency);
 
 	if (dev->last_state)
 		target_state = dev->last_state;

diff --git a/include/trace/events/power.h b/include/trace/events/power.h
@@ -34,6 +34,30 @@ DEFINE_EVENT(cpu, cpu_idle,
 	TP_ARGS(state, cpu_id)
 );
 
+DECLARE_EVENT_CLASS(residency,
+
+	TP_PROTO(unsigned long residency),
+
+	TP_ARGS(residency),
+
+	TP_STRUCT__entry(
+		__field(	u32,		residency	)
+	),
+
+	TP_fast_assign(
+		__entry->residency = residency;
+	),
+
+	TP_printk("\t%lu", (unsigned long)__entry->residency)
+);
+
+DEFINE_EVENT(residency, cpu_residency,
+
+	TP_PROTO(unsigned long residency),
+
+	TP_ARGS(residency)
+);
+
 /* This file can get included multiple times, TRACE_HEADER_MULTI_READ at top */
 #ifndef _PWR_EVENT_AVOID_DOUBLE_DEFINING
 #define _PWR_EVENT_AVOID_DOUBLE_DEFINING