Optimized Task-Search for upto 6% increase in Performance

kernel/sched/fair.c

@@ -6386,15 +6386,18 @@ void idle_balance(int this_cpu, struct rq *this_rq)
 			continue;
 
 		if (sd->flags & SD_BALANCE_NEWIDLE) {
-			/* If we've pulled tasks over stop searching: */
 			pulled_task = load_balance(this_cpu, this_rq,
 						   sd, CPU_NEWLY_IDLE, &balance);
 		}
 
 		interval = msecs_to_jiffies(sd->balance_interval);
 		if (time_after(next_balance, sd->last_balance + interval))
 			next_balance = sd->last_balance + interval;
-		if (pulled_task) {
+		/*
+		* Stop searching for tasks to pull if there are
+		* now runnable tasks on this rq.
+		*/
+		if (pulled_task || this_rq->nr_running > 0) {
 			this_rq->idle_stamp = 0;
 			break;
 		}