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Commit d19ca308 authored by Peter Zijlstra's avatar Peter Zijlstra Committed by Ingo Molnar
Browse files

sched: debug: add some debug code to handle the full hierarchy 



Add some extra debug output so we can get a better overview of the
full hierarchy.

We print the cgroup path after each cfs_rq, so we can see what group
we're looking at.

Signed-off-by: default avatarPeter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 18d95a28

kernel/sched_debug.c

+32 −3
Original line number Diff line number Diff line
@@ -67,14 +67,24 @@ print_task(struct seq_file *m, struct rq *rq, struct task_struct *p) 
		(long long)(p->nvcsw + p->nivcsw),

		p->prio);

#ifdef CONFIG_SCHEDSTATS

	SEQ_printf(m, "%9Ld.%06ld %9Ld.%06ld %9Ld.%06ld\n",

	SEQ_printf(m, "%9Ld.%06ld %9Ld.%06ld %9Ld.%06ld",

		SPLIT_NS(p->se.vruntime),

		SPLIT_NS(p->se.sum_exec_runtime),

		SPLIT_NS(p->se.sum_sleep_runtime));

#else

	SEQ_printf(m, "%15Ld %15Ld %15Ld.%06ld %15Ld.%06ld %15Ld.%06ld\n",

	SEQ_printf(m, "%15Ld %15Ld %15Ld.%06ld %15Ld.%06ld %15Ld.%06ld",

		0LL, 0LL, 0LL, 0L, 0LL, 0L, 0LL, 0L);

#endif



#ifdef CONFIG_CGROUP_SCHED

	{

		char path[64];



		cgroup_path(task_group(p)->css.cgroup, path, sizeof(path));

		SEQ_printf(m, " %s", path);

	}

#endif

	SEQ_printf(m, "\n");

}



static void print_rq(struct seq_file *m, struct rq *rq, int rq_cpu)
@@ -109,7 +119,21 @@ void print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq) 
	struct sched_entity *last;

	unsigned long flags;



	SEQ_printf(m, "\ncfs_rq\n");

#ifndef CONFIG_CGROUP_SCHED

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

#else

	char path[128] = "";

	struct cgroup *cgroup = NULL;

	struct task_group *tg = cfs_rq->tg;



	if (tg)

		cgroup = tg->css.cgroup;



	if (cgroup)

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



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

#endif



	SEQ_printf(m, "  .%-30s: %Ld.%06ld\n", "exec_clock",

			SPLIT_NS(cfs_rq->exec_clock));
@@ -143,6 +167,11 @@ void print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq) 
#endif

	SEQ_printf(m, "  .%-30s: %ld\n", "nr_spread_over",

			cfs_rq->nr_spread_over);

#ifdef CONFIG_FAIR_GROUP_SCHED

#ifdef CONFIG_SMP

	SEQ_printf(m, "  .%-30s: %lu\n", "shares", cfs_rq->shares);

#endif

#endif

}



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