[tip: sched/urgent] sched/debug: Add task uclamp values to SCHED_DEBUG procfs

[tip-bot2 for Valentin Schneider]

The following commit has been merged into the sched/urgent branch of tip:

Commit-ID:     96e74ebf8d594496f3dda5f8e26af6b4e161e4e9
Gitweb:        https://git.kernel.org/tip/96e74ebf8d594496f3dda5f8e26af6b4e161e4e9
Author:        Valentin Schneider <valentin.schneider@xxxxxxx>
AuthorDate:    Wed, 26 Feb 2020 12:45:43 
Committer:     Ingo Molnar <mingo@xxxxxxxxxx>
CommitterDate: Wed, 08 Apr 2020 11:35:27 +02:00

sched/debug: Add task uclamp values to SCHED_DEBUG procfs

Requested and effective uclamp values can be a bit tricky to decipher when
playing with cgroup hierarchies. Add them to a task's procfs when
SCHED_DEBUG is enabled.

Reviewed-by: Qais Yousef <qais.yousef@xxxxxxx>
Signed-off-by: Valentin Schneider <valentin.schneider@xxxxxxx>
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
Link: https://lkml.kernel.org/r/20200226124543.31986-4-valentin.schneider@xxxxxxx
---
 kernel/sched/debug.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/kernel/sched/debug.c b/kernel/sched/debug.c
index 315ef6d..a562df5 100644
--- a/kernel/sched/debug.c
+++ b/kernel/sched/debug.c
@@ -947,6 +947,12 @@ void proc_sched_show_task(struct task_struct *p, struct pid_namespace *ns,
 	P(se.avg.util_est.ewma);
 	P(se.avg.util_est.enqueued);
 #endif
+#ifdef CONFIG_UCLAMP_TASK
+	__PS("uclamp.min", p->uclamp[UCLAMP_MIN].value);
+	__PS("uclamp.max", p->uclamp[UCLAMP_MAX].value);
+	__PS("effective uclamp.min", uclamp_eff_value(p, UCLAMP_MIN));
+	__PS("effective uclamp.max", uclamp_eff_value(p, UCLAMP_MAX));
+#endif
 	P(policy);
 	P(prio);
 	if (task_has_dl_policy(p)) {