[PATCH] sched/fair: Add stats update for cfs_rq->exec_clock in update_curr() again

From: Dietmar Eggemann
Date: Fri May 03 2024 - 06:46:38 EST


Commit 5d69eca542ee ("sched: Unify runtime accounting across classes")
removed it and since then:

echo 1 > /proc/sys/kernel/sched_schedstats
cat /sys/kernel/debug/sched/debug | grep exec_clock

returns:

.exec_clock : 0.000000

for all cfs_rq's.

Put the schedstat_add() back to be able to watch the cfs_rq runtime
statistic.

Signed-off-by: Dietmar Eggemann <dietmar.eggemann@xxxxxxx>
---
kernel/sched/fair.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 9eb63573110c..37bb3cee6fec 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -1158,6 +1158,7 @@ static void update_curr(struct cfs_rq *cfs_rq)
delta_exec = update_curr_se(rq_of(cfs_rq), curr);
if (unlikely(delta_exec <= 0))
return;
+ schedstat_add(cfs_rq->exec_clock, delta_exec);

curr->vruntime += calc_delta_fair(delta_exec, curr);
update_deadline(cfs_rq, curr);
--
2.25.1