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Commit 7ba2e74a authored by Peter Zijlstra's avatar Peter Zijlstra Committed by Ingo Molnar
Browse files

sched: debug: show a weight tree 



Print a tree of weights.

Signed-off-by: default avatarPeter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 8f1bc385

kernel/sched_fair.c

+27 −0
Original line number Diff line number Diff line
@@ -1611,6 +1611,30 @@ static const struct sched_class fair_sched_class = { 
};



#ifdef CONFIG_SCHED_DEBUG

static void

print_cfs_rq_tasks(struct seq_file *m, struct cfs_rq *cfs_rq, int depth)

{

	struct sched_entity *se;



	if (!cfs_rq)

		return;



	list_for_each_entry_rcu(se, &cfs_rq->tasks, group_node) {

		int i;



		for (i = depth; i; i--)

			seq_puts(m, "  ");



		seq_printf(m, "%lu %s %lu\n",

				se->load.weight,

				entity_is_task(se) ? "T" : "G",

				calc_delta_weight(SCHED_LOAD_SCALE, se)

				);

		if (!entity_is_task(se))

			print_cfs_rq_tasks(m, group_cfs_rq(se), depth + 1);

	}

}



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

{

	struct cfs_rq *cfs_rq;
@@ -1618,6 +1642,9 @@ static void print_cfs_stats(struct seq_file *m, int cpu) 
	rcu_read_lock();

	for_each_leaf_cfs_rq(cpu_rq(cpu), cfs_rq)

		print_cfs_rq(m, cpu, cfs_rq);



	seq_printf(m, "\nWeight tree:\n");

	print_cfs_rq_tasks(m, &cpu_rq(cpu)->cfs, 1);

	rcu_read_unlock();

}

#endif