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Commit b224647f authored by Brendan Jackman's avatar Brendan Jackman Committed by Chris Redpath
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DEBUG: sched/fair: Fix sched_load_avg_cpu events for task_groups 



The current sched_load_avg_cpu event traces the load for any cfs_rq that is
updated. This is not representative of the CPU load - instead we should only
trace this event when the cfs_rq being updated is in the root_task_group.

Change-Id: I345c2f13f6b5718cb4a89beb247f7887ce97ed6b
Signed-off-by: default avatarBrendan Jackman <brendan.jackman@arm.com>
(cherry picked from commit 1cb392e10307ba3ef7d9a602e59e54ae3b6399ad)
(cherry picked from commit 835f5ebd2f7170c87dc1387976ed1b4e46215251)
Signed-off-by: default avatarQuentin Perret <quentin.perret@arm.com>
parent 0f493a73

kernel/sched/fair.c

+3 −1
Original line number Diff line number Diff line
@@ -3080,6 +3080,8 @@ update_cfs_rq_load_avg(u64 now, struct cfs_rq *cfs_rq, bool update_freq) 
	if (update_freq && (decayed || removed_util))

		cfs_rq_util_change(cfs_rq);



	/* Trace CPU load, unless cfs_rq belongs to a non-root task_group */

	if (cfs_rq == &rq_of(cfs_rq)->cfs)

		trace_sched_load_avg_cpu(cpu_of(rq_of(cfs_rq)), cfs_rq);



	return decayed || removed_load;