On Tue, May 21, 2019 at 12:01:42PM -0400, Steven Rostedt wrote: > > [ Added Peter and Rafael ]
Thanks Steve, > On Fri, 17 May 2019 22:34:27 +0200 > Viktor Rosendahl <[email protected]> wrote: > > diff --git a/include/trace/events/sched.h b/include/trace/events/sched.h > > index c8c7c7efb487..a1a1befea1c1 100644 > > --- a/include/trace/events/sched.h > > +++ b/include/trace/events/sched.h > > @@ -183,6 +183,46 @@ TRACE_EVENT(sched_switch, > > __entry->next_comm, __entry->next_pid, __entry->next_prio) > > ); > > > > +/* > > + * Tracepoint for entering __schedule(): > > + */ > > +TRACE_EVENT(sched_schedule_enter, > > + > > + TP_PROTO(int cpu), > > + > > + TP_ARGS(cpu), > > + > > + TP_STRUCT__entry( > > + __field(int, cpu) > > + ), > > + > > + TP_fast_assign( > > + __entry->cpu = cpu; > > + ), > > + > > + TP_printk("cpu=%d", __entry->cpu) > > +); > > + > > +/* > > + * Tracepoint for exiting __schedule(): > > + */ > > +TRACE_EVENT(sched_schedule_exit, > > + > > + TP_PROTO(int cpu), > > + > > + TP_ARGS(cpu), > > + > > + TP_STRUCT__entry( > > + __field(int, cpu) > > + ), > > + > > + TP_fast_assign( > > + __entry->cpu = cpu; > > + ), > > + > > + TP_printk("cpu=%d", __entry->cpu) > > +); > > + > > /* > > * Tracepoint for a task being migrated: > > */ > > diff --git a/kernel/sched/core.c b/kernel/sched/core.c > > index 102dfcf0a29a..c9d86fcc48f5 100644 > > --- a/kernel/sched/core.c > > +++ b/kernel/sched/core.c > > @@ -3374,6 +3374,7 @@ static void __sched notrace __schedule(bool preempt) > > int cpu; > > > > cpu = smp_processor_id(); > > + trace_sched_schedule_enter(cpu); > > rq = cpu_rq(cpu); > > prev = rq->curr; > > > > @@ -3448,6 +3449,7 @@ static void __sched notrace __schedule(bool preempt) > > } > > > > balance_callback(rq); > > + trace_sched_schedule_exit(cpu); > > } > > > > void __noreturn do_task_dead(void) > > diff --git a/kernel/sched/idle.c b/kernel/sched/idle.c > > index f5516bae0c1b..e328e045c6e8 100644 > > --- a/kernel/sched/idle.c > > +++ b/kernel/sched/idle.c > > @@ -224,6 +224,7 @@ static void cpuidle_idle_call(void) > > static void do_idle(void) > > { > > int cpu = smp_processor_id(); > > + trace_do_idle_enter(cpu); > > /* > > * If the arch has a polling bit, we maintain an invariant: > > * > > @@ -287,6 +288,7 @@ static void do_idle(void) > > > > if (unlikely(klp_patch_pending(current))) > > klp_update_patch_state(current); > > + trace_do_idle_exit(cpu); > > } > > > > bool cpu_in_idle(unsigned long pc) NAK!
