From: lakkyung.jung <lakkyung.jung@samsung.com>
Date: Mon, 16 Apr 2018 13:22:43 +0000 (+0900)
Subject: sched/events: Introduce util_est trace events
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=a681e40312bb377e2e78eb66f977f01c4cf59386;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

sched/events: Introduce util_est trace events

Change-Id: I22c98bbaa7dda598d31a20b310afbf16d5fb8208
Signed-off-by: lakkyung.jung <lakkyung.jung@samsung.com>
---

diff --git a/include/trace/events/sched.h b/include/trace/events/sched.h
index ac264bb331e9..1138faf98c70 100644
--- a/include/trace/events/sched.h
+++ b/include/trace/events/sched.h
@@ -902,6 +902,70 @@ TRACE_EVENT(sched_load_tg,
 );
 #endif /* CONFIG_FAIR_GROUP_SCHED */
 
+/*
+ * Tracepoint for tasks' estimated utilization.
+ */
+TRACE_EVENT(sched_util_est_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 int,	util_avg		)
+		__field( unsigned int,	est_enqueued		)
+		__field( unsigned int,	est_ewma		)
+
+	),
+
+	TP_fast_assign(
+		memcpy(__entry->comm, tsk->comm, TASK_COMM_LEN);
+		__entry->pid			= tsk->pid;
+		__entry->cpu			= task_cpu(tsk);
+		__entry->util_avg		= avg->util_avg;
+		__entry->est_enqueued		= avg->util_est.enqueued;
+		__entry->est_ewma		= avg->util_est.ewma;
+	),
+
+	TP_printk("comm=%s pid=%d cpu=%d util_avg=%u util_est_ewma=%u util_est_enqueued=%u",
+		  __entry->comm,
+		  __entry->pid,
+		  __entry->cpu,
+		  __entry->util_avg,
+		  __entry->est_ewma,
+		  __entry->est_enqueued)
+);
+
+/*
+ * Tracepoint for root cfs_rq's estimated utilization.
+ */
+TRACE_EVENT(sched_util_est_cpu,
+
+	TP_PROTO(int cpu, struct cfs_rq *cfs_rq),
+
+	TP_ARGS(cpu, cfs_rq),
+
+	TP_STRUCT__entry(
+		__field( int,		cpu			)
+		__field( unsigned int,	util_avg		)
+		__field( unsigned int,	util_est_enqueued	)
+	),
+
+	TP_fast_assign(
+		__entry->cpu			= cpu;
+		__entry->util_avg		= cfs_rq->avg.util_avg;
+		__entry->util_est_enqueued	= cfs_rq->avg.util_est.enqueued;
+	),
+
+	TP_printk("cpu=%d util_avg=%u util_est_enqueued=%u",
+		  __entry->cpu,
+		  __entry->util_avg,
+		  __entry->util_est_enqueued)
+);
+
 /*
  * Tracepoint for accounting CPU  boosted utilization
  */
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 79e7c724e70e..2e5975a9eea0 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -3671,6 +3671,10 @@ static inline void util_est_enqueue(struct cfs_rq *cfs_rq,
 	enqueued  = cfs_rq->avg.util_est.enqueued;
 	enqueued += (_task_util_est(p) | UTIL_AVG_UNCHANGED);
 	WRITE_ONCE(cfs_rq->avg.util_est.enqueued, enqueued);
+
+	/* Update plots for Task and CPU estimated utilization */
+	trace_sched_util_est_task(p, &p->se.avg);
+	trace_sched_util_est_cpu(cpu_of(rq_of(cfs_rq)), cfs_rq);
 }
 
 /*
@@ -3708,6 +3712,9 @@ util_est_dequeue(struct cfs_rq *cfs_rq, struct task_struct *p, bool task_sleep)
 	}
 	WRITE_ONCE(cfs_rq->avg.util_est.enqueued, ue.enqueued);
 
+	/* Update plots for CPU's estimated utilization */
+	trace_sched_util_est_cpu(cpu_of(rq_of(cfs_rq)), cfs_rq);
+
 	/*
 	 * Skip update of task's estimated utilization when the task has not
 	 * yet completed an activation, e.g. being migrated.
@@ -3753,6 +3760,9 @@ util_est_dequeue(struct cfs_rq *cfs_rq, struct task_struct *p, bool task_sleep)
 	ue.ewma  += last_ewma_diff;
 	ue.ewma >>= UTIL_EST_WEIGHT_SHIFT;
 	WRITE_ONCE(p->se.avg.util_est, ue);
+
+	/* Update plots for Task's estimated utilization */
+	trace_sched_util_est_task(p, &p->se.avg);
 }
 
 #else /* CONFIG_SMP */