From: Morten Rasmussen <morten.rasmus...@arm.com>
Adds usage contribution tracking for group entities. Unlike
se->avg.load_avg_contrib, se->avg.utilization_avg_contrib for group
entities is the sum of se->avg.utilization_avg_contrib for all entities on the
group runqueue. It is _not_ influenced in any way by the task group
h_load. Hence it is representing the actual cpu usage of the group, not
its intended load contribution which may differ significantly from the
utilization on lightly utilized systems.
cc: Paul Turner <p...@google.com>
cc: Ben Segall <bseg...@google.com>
Signed-off-by: Morten Rasmussen <morten.rasmus...@arm.com>
Signed-off-by: Vincent Guittot <vincent.guit...@linaro.org>
---
kernel/sched/debug.c | 2 ++
kernel/sched/fair.c | 3 +++
2 files changed, 5 insertions(+)
diff --git a/kernel/sched/debug.c b/kernel/sched/debug.c
index f384452..efb47ed 100644
--- a/kernel/sched/debug.c
+++ b/kernel/sched/debug.c
@@ -94,8 +94,10 @@ static void print_cfs_group_stats(struct seq_file *m, int
cpu, struct task_group
P(se->load.weight);
#ifdef CONFIG_SMP
P(se->avg.runnable_avg_sum);
+ P(se->avg.running_avg_sum);
P(se->avg.avg_period);
P(se->avg.load_avg_contrib);
+ P(se->avg.utilization_avg_contrib);
P(se->avg.decay_count);
#endif
#undef PN
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 3a91ae6..a171e1b 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -2529,6 +2529,9 @@ static long
__update_entity_utilization_avg_contrib(struct sched_entity *se)
if (entity_is_task(se))
__update_task_entity_utilization(se);
+ else
+ se->avg.utilization_avg_contrib =
+ group_cfs_rq(se)->utilization_load_avg;
return se->avg.utilization_avg_contrib - old_contrib;
}
--
1.9.1
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