On Fri, Dec 05, 2025 at 02:16:17PM +0100 Gabriele Monaco wrote: > Add the following tracepoints: > > * sched_dl_throttle(dl_se, cpu): > Called when a deadline entity is throttled > * sched_dl_replenish(dl_se, cpu): > Called when a deadline entity's runtime is replenished > * sched_dl_server_start(dl_se, cpu): > Called when a deadline server is started > * sched_dl_server_stop(dl_se, cpu): > Called when a deadline server is stopped > > Those tracepoints can be useful to validate the deadline scheduler with > RV and are not exported to tracefs. > > Signed-off-by: Gabriele Monaco <[email protected]>
These seem like they might be useful outside of the RV context as well. Reviewed-by: Phil Auld <[email protected]> Cheers, Phil > --- > > Notes: > V3: > * Rename dl argument to dl_se in tracepoints > > include/trace/events/sched.h | 16 ++++++++++++++++ > kernel/sched/core.c | 4 ++++ > kernel/sched/deadline.c | 7 +++++++ > 3 files changed, 27 insertions(+) > > diff --git a/include/trace/events/sched.h b/include/trace/events/sched.h > index 7b2645b50e78..366b2e8ec40c 100644 > --- a/include/trace/events/sched.h > +++ b/include/trace/events/sched.h > @@ -896,6 +896,22 @@ DECLARE_TRACE(sched_set_need_resched, > TP_PROTO(struct task_struct *tsk, int cpu, int tif), > TP_ARGS(tsk, cpu, tif)); > > +DECLARE_TRACE(sched_dl_throttle, > + TP_PROTO(struct sched_dl_entity *dl_se, int cpu), > + TP_ARGS(dl_se, cpu)); > + > +DECLARE_TRACE(sched_dl_replenish, > + TP_PROTO(struct sched_dl_entity *dl_se, int cpu), > + TP_ARGS(dl_se, cpu)); > + > +DECLARE_TRACE(sched_dl_server_start, > + TP_PROTO(struct sched_dl_entity *dl_se, int cpu), > + TP_ARGS(dl_se, cpu)); > + > +DECLARE_TRACE(sched_dl_server_stop, > + TP_PROTO(struct sched_dl_entity *dl_se, int cpu), > + TP_ARGS(dl_se, cpu)); > + > #endif /* _TRACE_SCHED_H */ > > /* This part must be outside protection */ > diff --git a/kernel/sched/core.c b/kernel/sched/core.c > index 5516778c19eb..3aed0ed6f2e9 100644 > --- a/kernel/sched/core.c > +++ b/kernel/sched/core.c > @@ -122,6 +122,10 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(sched_compute_energy_tp); > EXPORT_TRACEPOINT_SYMBOL_GPL(sched_entry_tp); > EXPORT_TRACEPOINT_SYMBOL_GPL(sched_exit_tp); > EXPORT_TRACEPOINT_SYMBOL_GPL(sched_set_need_resched_tp); > +EXPORT_TRACEPOINT_SYMBOL_GPL(sched_dl_throttle_tp); > +EXPORT_TRACEPOINT_SYMBOL_GPL(sched_dl_replenish_tp); > +EXPORT_TRACEPOINT_SYMBOL_GPL(sched_dl_server_start_tp); > +EXPORT_TRACEPOINT_SYMBOL_GPL(sched_dl_server_stop_tp); > > DEFINE_PER_CPU_SHARED_ALIGNED(struct rq, runqueues); > DEFINE_PER_CPU(struct rnd_state, sched_rnd_state); > diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c > index 319439fe1870..2192e9f42e02 100644 > --- a/kernel/sched/deadline.c > +++ b/kernel/sched/deadline.c > @@ -733,6 +733,7 @@ static inline void replenish_dl_new_period(struct > sched_dl_entity *dl_se, > dl_se->dl_throttled = 1; > dl_se->dl_defer_armed = 1; > } > + trace_sched_dl_replenish_tp(dl_se, cpu_of(rq)); > } > > /* > @@ -850,6 +851,8 @@ static void replenish_dl_entity(struct sched_dl_entity > *dl_se) > if (dl_se->dl_throttled) > dl_se->dl_throttled = 0; > > + trace_sched_dl_replenish_tp(dl_se, cpu_of(rq)); > + > /* > * If this is the replenishment of a deferred reservation, > * clear the flag and return. > @@ -1341,6 +1344,7 @@ static inline void dl_check_constrained_dl(struct > sched_dl_entity *dl_se) > dl_time_before(rq_clock(rq), dl_next_period(dl_se))) { > if (unlikely(is_dl_boosted(dl_se) || !start_dl_timer(dl_se))) > return; > + trace_sched_dl_throttle_tp(dl_se, cpu_of(rq)); > dl_se->dl_throttled = 1; > if (dl_se->runtime > 0) > dl_se->runtime = 0; > @@ -1504,6 +1508,7 @@ static void update_curr_dl_se(struct rq *rq, struct > sched_dl_entity *dl_se, s64 > > throttle: > if (dl_runtime_exceeded(dl_se) || dl_se->dl_yielded) { > + trace_sched_dl_throttle_tp(dl_se, cpu_of(rq)); > dl_se->dl_throttled = 1; > > /* If requested, inform the user about runtime overruns. */ > @@ -1795,6 +1800,7 @@ void dl_server_start(struct sched_dl_entity *dl_se) > if (WARN_ON_ONCE(!cpu_online(cpu_of(rq)))) > return; > > + trace_sched_dl_server_start_tp(dl_se, cpu_of(rq)); > dl_se->dl_server_active = 1; > enqueue_dl_entity(dl_se, ENQUEUE_WAKEUP); > if (!dl_task(dl_se->rq->curr) || dl_entity_preempt(dl_se, > &rq->curr->dl)) > @@ -1806,6 +1812,7 @@ void dl_server_stop(struct sched_dl_entity *dl_se) > if (!dl_server(dl_se) || !dl_server_active(dl_se)) > return; > > + trace_sched_dl_server_stop_tp(dl_se, cpu_of(dl_se->rq)); > dequeue_dl_entity(dl_se, DEQUEUE_SLEEP); > hrtimer_try_to_cancel(&dl_se->dl_timer); > dl_se->dl_defer_armed = 0; > -- > 2.52.0 > > --
