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Commit 03163c31 authored by Srivatsa Vaddagiri's avatar Srivatsa Vaddagiri Committed by Steve Muckle
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sched: Use rq->efficiency in scaling load stats 



Extend task load scaling function to account for cpu efficiency
factor. Task load is scaled in reference to "most" efficient cpu.

Change-Id: I7bf829211a6e1293076e8ba0f93b4f6abcf20d92
Signed-off-by: default avatarSrivatsa Vaddagiri <vatsa@codeaurora.org>
parent 28445566

kernel/sched/core.c

+4 −0
Original line number Diff line number Diff line
@@ -1449,6 +1449,7 @@ void update_task_ravg(struct task_struct *p, struct rq *rq, int update_sum) 


		if (update_sum) {

			unsigned int cur_freq = rq->cur_freq;

			int sf;



			delta = now - p->ravg.mark_start;

			BUG_ON(delta < 0);
@@ -1460,6 +1461,9 @@ void update_task_ravg(struct task_struct *p, struct rq *rq, int update_sum) 


			delta = div64_u64(delta  * cur_freq,

							max_possible_freq);

			sf = (rq->efficiency * 1024) / max_possible_efficiency;

			delta *= sf;

			delta >>= 10;

			p->ravg.sum += delta;

			WARN_ON(p->ravg.sum > window_size);

		}

kernel/sched/fair.c

+4 −0
Original line number Diff line number Diff line
@@ -1678,6 +1678,7 @@ add_to_scaled_stat(int cpu, struct sched_avg *sa, u64 delta) 
	int cur_freq = rq->cur_freq, max_freq = rq->max_freq;

	int cpu_max_possible_freq = rq->max_possible_freq;

	u64 scaled_delta;

	int sf;



	if (unlikely(cur_freq > max_possible_freq ||

		     (cur_freq == max_freq &&
@@ -1685,6 +1686,9 @@ add_to_scaled_stat(int cpu, struct sched_avg *sa, u64 delta) 
		cur_freq = max_possible_freq;



	scaled_delta = div64_u64(delta * cur_freq, max_possible_freq);

	sf = (rq->efficiency * 1024) / max_possible_efficiency;

	scaled_delta *= sf;

	scaled_delta >>= 10;

	sa->runnable_avg_sum_scaled += scaled_delta;

}