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sched: debug: add some rt debug output
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Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: "Daniel K." <dk@uw.no>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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Peter Zijlstra authored and Ingo Molnar committed Jun 20, 2008
1 parent 1cdad71 commit ada18de
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Showing 2 changed files with 51 additions and 3 deletions.
40 changes: 37 additions & 3 deletions kernel/sched_debug.c
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Original file line number Diff line number Diff line change
Expand Up @@ -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;
Expand All @@ -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",
Expand Down Expand Up @@ -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);
Expand Down Expand Up @@ -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);
}
Expand Down
14 changes: 14 additions & 0 deletions kernel/sched_rt.c
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Original file line number Diff line number Diff line change
Expand Up @@ -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

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