From: Johnlay Park <jonglae.park@samsung.com>
Date: Fri, 6 Apr 2018 07:10:14 +0000 (+0900)
Subject: [COMMON] sched/rt: add a trace point for FRT algorithm
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=6ab30c0e90fb3737aaf5f7b352c752e95bb874c6;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

[COMMON] sched/rt: add a trace point for FRT algorithm

for optimizing the system performance

Change-Id: I70c7a5f5c06b84e40689030e2186faee14a75c26
Signed-off-by: Johnlay Park <jonglae.park@samsung.com>
---

diff --git a/include/trace/events/sched.h b/include/trace/events/sched.h
index e668c0e2bc87..ac264bb331e9 100644
--- a/include/trace/events/sched.h
+++ b/include/trace/events/sched.h
@@ -638,47 +638,43 @@ struct cfs_rq *__trace_sched_group_cfs_rq(struct sched_entity *se)
 #endif /* CREATE_TRACE_POINTS */
 
 /*
- * Tracepoint for accounting sched averages for fair tasks.
+ * Tracepoint for logging FRT schedule activity
  */
-TRACE_EVENT(sched_load_avg_task,
+TRACE_EVENT(sched_fluid_stat,
 
-	TP_PROTO(struct task_struct *tsk, struct sched_avg *avg),
+	TP_PROTO(struct task_struct *tsk, struct sched_avg *avg, int best, char* str),
 
-	TP_ARGS(tsk, avg),
+	TP_ARGS(tsk, avg, best, str),
 
 	TP_STRUCT__entry(
-		__array( char,	comm,	TASK_COMM_LEN		)
+		__array( char,	selectby,	TASK_COMM_LEN	)
+		__array( char,	targettsk,	TASK_COMM_LEN	)
 		__field( pid_t,	pid				)
-		__field( int,	cpu				)
+		__field( int,	bestcpu				)
+		__field( int,	prevcpu				)
 		__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);
+		memcpy(__entry->selectby, str, TASK_COMM_LEN);
+		memcpy(__entry->targettsk, tsk->comm, TASK_COMM_LEN);
 		__entry->pid			= tsk->pid;
-		__entry->cpu			= task_cpu(tsk);
+		__entry->bestcpu		= best;
+		__entry->prevcpu		= 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("fair: comm=%s pid=%d cpu=%d load_avg=%lu util_avg=%lu "
-			"load_sum=%llu util_sum=%u period_contrib=%u",
-		  __entry->comm,
+	TP_printk("frt: comm=%s pid=%d assigned to #%d from #%d load_avg=%lu util_avg=%lu "
+			"by %s.",
+		  __entry->targettsk,
 		  __entry->pid,
-		  __entry->cpu,
+		  __entry->bestcpu,
+		  __entry->prevcpu,
 		  __entry->load_avg,
 		  __entry->util_avg,
-		  (u64)__entry->load_sum,
-		  (u32)__entry->util_sum,
-		  (u32)__entry->period_contrib)
+		  __entry->selectby)
 );
-
 /*
  * Tracepoint for accounting sched averages for tasks.
  */
diff --git a/kernel/sched/rt.c b/kernel/sched/rt.c
index f0b2572a5ae2..7fd21086e725 100644
--- a/kernel/sched/rt.c
+++ b/kernel/sched/rt.c
@@ -2278,6 +2278,11 @@ static int find_victim_rt_rq(struct task_struct *task, struct sched_group *sg, i
 		set_victim_flag(cpu_rq(*best_cpu)->curr);
 	}
 
+	if (victim_rt)
+		trace_sched_fluid_stat(task, &task->se.avg, *best_cpu, "VICTIM-FAIR");
+	else
+		trace_sched_fluid_stat(task, &task->se.avg, *best_cpu, "VICTIM-RT");
+
 	return *best_cpu;
 
 }
@@ -2319,6 +2324,7 @@ static int find_lowest_rq_fluid(struct task_struct *task, int wake_flags)
 	 */
 	if (wake_flags || affordable_cpu(prefer_cpu, task_util(task))) {
 		best_cpu = prefer_cpu;
+		trace_sched_fluid_stat(task, &task->se.avg, best_cpu, "CACHE-HOT");
 		goto out;
 	}
 
@@ -2336,6 +2342,7 @@ static int find_lowest_rq_fluid(struct task_struct *task, int wake_flags)
 
 		if (idle_cpu(cpu)) {
 			best_cpu = cpu;
+			trace_sched_fluid_stat(task, &task->se.avg, best_cpu, "IDLE-FIRST");
 			goto out;
 		}
 	}
@@ -2380,6 +2387,7 @@ static int find_lowest_rq_fluid(struct task_struct *task, int wake_flags)
 		if (min_cpu >= 0 &&
 			((capacity_of(min_cpu) >= min_load) || (min_cpu == prefer_cpu))) {
 			best_cpu = min_cpu;
+			trace_sched_fluid_stat(task, &task->se.avg, best_cpu, "FAIR-RECESS");
 			goto unlock;
 		}
 
@@ -2387,6 +2395,7 @@ static int find_lowest_rq_fluid(struct task_struct *task, int wake_flags)
 		if (min_rt_cpu >= 0 &&
 			((capacity_of(min_rt_cpu) >= min_rt_load) || (min_rt_cpu == prefer_cpu))) {
 			best_cpu = min_rt_cpu;
+			trace_sched_fluid_stat(task, &task->se.avg, best_cpu, "RT-RECESS");
 			goto unlock;
 		}