From: Juri Lelli <juri.lelli@arm.com>
Date: Mon, 9 Nov 2015 12:07:27 +0000 (+0000)
Subject: DEBUG: sched: add tracepoint for task load/util signals
X-Git-Tag: firefly_0821_release~2507^2~6
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=1b79543f25c0047013e8e6b64df9f01e248de8ea;p=firefly-linux-kernel-4.4.55.git

DEBUG: sched: add tracepoint for task load/util signals

Signed-off-by: Juri Lelli <juri.lelli@arm.com>
---

diff --git a/include/trace/events/sched.h b/include/trace/events/sched.h
index 20a7216f8abb..99f3e648c197 100644
--- a/include/trace/events/sched.h
+++ b/include/trace/events/sched.h
@@ -586,6 +586,49 @@ TRACE_EVENT(sched_contrib_scale_f,
 		  __entry->cpu, __entry->freq_scale_factor,
 		  __entry->cpu_scale_factor)
 );
+
+/*
+ * Tracepoint for accounting sched averages for tasks.
+ */
+TRACE_EVENT(sched_load_avg_task,
+
+	TP_PROTO(struct task_struct *tsk, struct sched_avg *avg),
+
+	TP_ARGS(tsk, avg),
+
+	TP_STRUCT__entry(
+		__array( char,	comm,	TASK_COMM_LEN		)
+		__field( pid_t,	pid				)
+		__field( int,	cpu				)
+		__field( unsigned long,	load_avg		)
+		__field( unsigned long,	util_avg		)
+		__field( u64,		load_sum		)
+		__field( u32,		util_sum		)
+		__field( u32,		period_contrib		)
+	),
+
+	TP_fast_assign(
+		memcpy(__entry->comm, tsk->comm, TASK_COMM_LEN);
+		__entry->pid			= tsk->pid;
+		__entry->cpu			= task_cpu(tsk);
+		__entry->load_avg		= avg->load_avg;
+		__entry->util_avg		= avg->util_avg;
+		__entry->load_sum		= avg->load_sum;
+		__entry->util_sum		= avg->util_sum;
+		__entry->period_contrib		= avg->period_contrib;
+	),
+
+	TP_printk("comm=%s pid=%d cpu=%d load_avg=%lu util_avg=%lu load_sum=%llu"
+		  " util_sum=%u period_contrib=%u",
+		  __entry->comm,
+		  __entry->pid,
+		  __entry->cpu,
+		  __entry->load_avg,
+		  __entry->util_avg,
+		  (u64)__entry->load_sum,
+		  (u32)__entry->util_sum,
+		  (u32)__entry->period_contrib)
+);
 #endif /* _TRACE_SCHED_H */
 
 /* This part must be outside protection */
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index ec2e8aecc4f3..8cdb4e5592f9 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -2731,6 +2731,9 @@ static inline void update_load_avg(struct sched_entity *se, int update_tg)
 
 	if (update_cfs_rq_load_avg(now, cfs_rq) && update_tg)
 		update_tg_load_avg(cfs_rq, 0);
+
+	if (entity_is_task(se))
+		trace_sched_load_avg_task(task_of(se), &se->avg);
 }
 
 static void attach_entity_load_avg(struct cfs_rq *cfs_rq, struct sched_entity *se)