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Commit 649af694 authored by Pavankumar Kondeti's avatar Pavankumar Kondeti
Browse files

sched: walt: select sysctl_sched_is_big_little dynamically 



If the energy model indicates that there is an overlap between
the clusters, set sysctl_sched_is_big_little to 0.

Change-Id: Iaf633a69809f325120e7a77ae0747f42deb6ae7f
Signed-off-by: default avatarPavankumar Kondeti <pkondeti@codeaurora.org>
parent c5927f1c

kernel/sched/walt.c

+24 −0
Original line number Diff line number Diff line
@@ -2178,8 +2178,32 @@ static void sort_clusters(void) 


void walt_sched_energy_populated_callback(void)

{

	struct sched_cluster *cluster;

	int prev_max = 0;



	mutex_lock(&cluster_lock);



	if (num_clusters == 1) {

		sysctl_sched_is_big_little = 0;

		mutex_unlock(&cluster_lock);

		return;

	}



	sort_clusters();



	for_each_sched_cluster(cluster) {

		if (cluster->min_power_cost > prev_max) {

			prev_max = cluster->max_power_cost;

			continue;

		}

		/*

		 * We assume no overlap in the power curves of

		 * clusters on a big.LITTLE system.

		 */

		sysctl_sched_is_big_little = 0;

		break;

	}



	mutex_unlock(&cluster_lock);

}