The following commit has been merged into the sched/core branch of tip:
Commit-ID: ed7b564cfdd0668efbd739d0b4e2d67797293f32
Gitweb: https://git.kernel.org/tip/ed7b564cfdd0668efbd739d0b4e2d67797293f32
Author: Yafang Shao <laoar.shao@xxxxxxxxx>
AuthorDate: Sun, 05 Sep 2021 14:35:44
Committer: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
CommitterDate: Tue, 05 Oct 2021 15:51:49 +02:00
sched/rt: Support sched_stat_runtime tracepoint for RT sched class
The runtime of a RT task has already been there, so we only need to
add a tracepoint.
One difference between fair task and RT task is that there is no vruntime
in RT task. To reuse the sched_stat_runtime tracepoint, '0' is passed as
vruntime for RT task.
The output of this tracepoint for RT task as follows,
stress-9748 [039] d.h. 113.519352: sched_stat_runtime: comm=stress pid=9748 runtime=997573 [ns] vruntime=0 [ns]
stress-9748 [039] d.h. 113.520352: sched_stat_runtime: comm=stress pid=9748 runtime=997627 [ns] vruntime=0 [ns]
stress-9748 [039] d.h. 113.521352: sched_stat_runtime: comm=stress pid=9748 runtime=998203 [ns] vruntime=0 [ns]
Signed-off-by: Yafang Shao <laoar.shao@xxxxxxxxx>
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20210905143547.4668-6-laoar.shao@xxxxxxxxx
---
kernel/sched/rt.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/kernel/sched/rt.c b/kernel/sched/rt.c
index 95a7c3a..5d25111 100644
--- a/kernel/sched/rt.c
+++ b/kernel/sched/rt.c
@@ -1012,6 +1012,8 @@ static void update_curr_rt(struct rq *rq)
schedstat_set(curr->stats.exec_max,
max(curr->stats.exec_max, delta_exec));
+ trace_sched_stat_runtime(curr, delta_exec, 0);
+
curr->se.sum_exec_runtime += delta_exec;
account_group_exec_runtime(curr, delta_exec);
|