sched: SCHED_HMP multi-domain task migration control

We need a way to prevent tasks that are migrating up and down the
hmp_domains from migrating straight on through before the load has
adapted to the new compute capacity of the CPU on the new hmp_domain.
This patch adds a next up/down migration delay that prevents the task
from doing another migration in the same direction until the delay
has expired.

Signed-off-by: Morten Rasmussen <Morten.Rasmussen@arm.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/include/linux/sched.h b/include/linux/sched.h
index cfb9a2efc21..5e903596e48 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -938,6 +938,10 @@ struct sched_avg {
 	s64 decay_count;
 	unsigned long load_avg_contrib;
 	unsigned long load_avg_ratio;
+#ifdef CONFIG_SCHED_HMP
+	u64 hmp_last_up_migration;
+	u64 hmp_last_down_migration;
+#endif
 	u32 usage_avg_sum;
 };