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Commit a8027073 authored by Steven Rostedt's avatar Steven Rostedt Committed by Steven Rostedt
Browse files

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 <ghaskins@novell.com>
Acked-by: default avatarPeter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: default avatarSteven Rostedt <rostedt@goodmis.org>
parent b3bc211c

include/trace/events/sched.h

+29 −0
Original line number Diff line number Diff line
@@ -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 */

kernel/sched.c

+1 −0
Original line number Diff line number Diff line
@@ -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;