From a8027073eb127cd207070891374b5c54c2ce3d23 Mon Sep 17 00:00:00 2001 From: Steven Rostedt Date: Mon, 20 Sep 2010 15:13:34 -0400 Subject: [PATCH] tracing/sched: Add sched_pi_setprio tracepoint Add a tracepoint that shows the priority of a task being boosted via priority inheritance. Cc: Gregory Haskins Acked-by: Peter Zijlstra Signed-off-by: Steven Rostedt --- include/trace/events/sched.h | 29 +++++++++++++++++++++++++++++ kernel/sched.c | 1 + 2 files changed, 30 insertions(+) diff --git a/include/trace/events/sched.h b/include/trace/events/sched.h index 9208c92aeab5..f6334782a593 100644 --- a/include/trace/events/sched.h +++ b/include/trace/events/sched.h @@ -362,6 +362,35 @@ TRACE_EVENT(sched_stat_runtime, (unsigned long long)__entry->vruntime) ); +/* + * Tracepoint for showing priority inheritance modifying a tasks + * priority. + */ +TRACE_EVENT(sched_pi_setprio, + + TP_PROTO(struct task_struct *tsk, int newprio), + + TP_ARGS(tsk, newprio), + + TP_STRUCT__entry( + __array( char, comm, TASK_COMM_LEN ) + __field( pid_t, pid ) + __field( int, oldprio ) + __field( int, newprio ) + ), + + TP_fast_assign( + memcpy(__entry->comm, tsk->comm, TASK_COMM_LEN); + __entry->pid = tsk->pid; + __entry->oldprio = tsk->prio; + __entry->newprio = newprio; + ), + + TP_printk("comm=%s pid=%d oldprio=%d newprio=%d", + __entry->comm, __entry->pid, + __entry->oldprio, __entry->newprio) +); + #endif /* _TRACE_SCHED_H */ /* This part must be outside protection */ diff --git a/kernel/sched.c b/kernel/sched.c index 9ca8ad05950b..4ad473814350 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -4355,6 +4355,7 @@ void rt_mutex_setprio(struct task_struct *p, int prio) rq = task_rq_lock(p, &flags); + trace_sched_pi_setprio(p, prio); oldprio = p->prio; prev_class = p->sched_class; on_rq = p->se.on_rq; -- GitLab