sched/debug: Add new tracepoint to track PELT at se level

The new tracepoint allows tracking PELT signals at sched_entity level.
Which is supported in CFS tasks and taskgroups only.

Signed-off-by: Qais Yousef <qais.yousef@arm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Dietmar Eggemann <dietmar.eggemann@arm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Pavankumar Kondeti <pkondeti@codeaurora.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Quentin Perret <quentin.perret@arm.com>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Uwe Kleine-Konig <u.kleine-koenig@pengutronix.de>
Link: https://lkml.kernel.org/r/20190604111459.2862-5-qais.yousef@arm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>

diff --git a/include/trace/events/sched.h b/include/trace/events/sched.h
index 520b89d..c7dd9bc 100644 (file)
--- a/include/trace/events/sched.h
+++ b/include/trace/events/sched.h
@@ -617,6 +617,10 @@ DECLARE_TRACE(pelt_irq_tp,
        TP_PROTO(struct rq *rq),
        TP_ARGS(rq));
 
+DECLARE_TRACE(pelt_se_tp,
+       TP_PROTO(struct sched_entity *se),
+       TP_ARGS(se));
+
 #endif /* _TRACE_SCHED_H */
 
 /* This part must be outside protection */

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index e883d7e..75218ab 100644 (file)
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -3348,6 +3348,7 @@ static inline int propagate_entity_load_avg(struct sched_entity *se)
        update_tg_cfs_runnable(cfs_rq, se, gcfs_rq);
 
        trace_pelt_cfs_tp(cfs_rq);
+       trace_pelt_se_tp(se);
 
        return 1;
 }

diff --git a/kernel/sched/pelt.c b/kernel/sched/pelt.c
index 4e961b5..a96db50 100644 (file)
--- a/kernel/sched/pelt.c
+++ b/kernel/sched/pelt.c
@@ -267,6 +267,7 @@ int __update_load_avg_blocked_se(u64 now, struct sched_entity *se)
 {
        if (___update_load_sum(now, &se->avg, 0, 0, 0)) {
                ___update_load_avg(&se->avg, se_weight(se), se_runnable(se));
+               trace_pelt_se_tp(se);
                return 1;
        }
 
@@ -280,6 +281,7 @@ int __update_load_avg_se(u64 now, struct cfs_rq *cfs_rq, struct sched_entity *se
 
                ___update_load_avg(&se->avg, se_weight(se), se_runnable(se));
                cfs_se_util_change(&se->avg);
+               trace_pelt_se_tp(se);
                return 1;
        }