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Commit ada18de2 authored by Peter Zijlstra's avatar Peter Zijlstra Committed by Ingo Molnar
Browse files

sched: debug: add some rt debug output 



Signed-off-by: default avatarPeter Zijlstra <a.p.zijlstra@chello.nl>
Cc: "Daniel K." <dk@uw.no>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 1cdad715

kernel/sched_debug.c

+37 −3
Original line number Diff line number Diff line
@@ -119,9 +119,7 @@ void print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq) 
	struct sched_entity *last;

	unsigned long flags;



#if !defined(CONFIG_CGROUP_SCHED) || !defined(CONFIG_USER_SCHED)

	SEQ_printf(m, "\ncfs_rq[%d]:\n", cpu);

#else

#if defined(CONFIG_CGROUP_SCHED) && defined(CONFIG_FAIR_GROUP_SCHED)

	char path[128] = "";

	struct cgroup *cgroup = NULL;

	struct task_group *tg = cfs_rq->tg;
@@ -133,6 +131,8 @@ void print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq) 
		cgroup_path(cgroup, path, sizeof(path));



	SEQ_printf(m, "\ncfs_rq[%d]:%s\n", cpu, path);

#else

	SEQ_printf(m, "\ncfs_rq[%d]:\n", cpu);

#endif



	SEQ_printf(m, "  .%-30s: %Ld.%06ld\n", "exec_clock",
@@ -169,6 +169,39 @@ void print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq) 
			cfs_rq->nr_spread_over);

}



void print_rt_rq(struct seq_file *m, int cpu, struct rt_rq *rt_rq)

{

#if defined(CONFIG_CGROUP_SCHED) && defined(CONFIG_RT_GROUP_SCHED)

	char path[128] = "";

	struct cgroup *cgroup = NULL;

	struct task_group *tg = rt_rq->tg;



	if (tg)

		cgroup = tg->css.cgroup;



	if (cgroup)

		cgroup_path(cgroup, path, sizeof(path));



	SEQ_printf(m, "\nrt_rq[%d]:%s\n", cpu, path);

#else

	SEQ_printf(m, "\nrt_rq[%d]:\n", cpu);

#endif





#define P(x) \

	SEQ_printf(m, "  .%-30s: %Ld\n", #x, (long long)(rt_rq->x))

#define PN(x) \

	SEQ_printf(m, "  .%-30s: %Ld.%06ld\n", #x, SPLIT_NS(rt_rq->x))



	P(rt_nr_running);

	P(rt_throttled);

	PN(rt_time);

	PN(rt_runtime);



#undef PN

#undef P

}



static void print_cpu(struct seq_file *m, int cpu)

{

	struct rq *rq = &per_cpu(runqueues, cpu);
@@ -208,6 +241,7 @@ static void print_cpu(struct seq_file *m, int cpu) 
#undef PN



	print_cfs_stats(m, cpu);

	print_rt_stats(m, cpu);



	print_rq(m, rq, cpu);

}

kernel/sched_rt.c

+14 −0
Original line number Diff line number Diff line
@@ -1444,3 +1444,17 @@ static const struct sched_class rt_sched_class = { 
	.prio_changed		= prio_changed_rt,

	.switched_to		= switched_to_rt,

};



#ifdef CONFIG_SCHED_DEBUG

extern void print_rt_rq(struct seq_file *m, int cpu, struct rt_rq *rt_rq);



static void print_rt_stats(struct seq_file *m, int cpu)

{

	struct rt_rq *rt_rq;



	rcu_read_lock();

	for_each_leaf_rt_rq(rt_rq, cpu_rq(cpu))

		print_rt_rq(m, cpu, rt_rq);

	rcu_read_unlock();

}

#endif