sched: add se->vruntime debugging

debug se->vruntime fields.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Mike Galbraith <efault@gmx.de>

1 files changed, 27 insertions, 3 deletions

diff --git a/kernel/sched_debug.c b/kernel/sched_debug.c
index 6b789dae7fdf..75ccf7aa98f3 100644
--- a/kernel/sched_debug.c
+++ b/kernel/sched_debug.c
@@ -44,7 +44,8 @@ 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, "%15Ld %15Ld %15Ld %15Ld %15Ld\n",
+        SEQ_printf(m, "%15Ld %15Ld %15Ld %15Ld %15Ld %15Ld\n",
+                (long long)p->se.vruntime,
                 (long long)p->se.sum_exec_runtime,
                 (long long)p->se.sum_wait_runtime,
                 (long long)p->se.sum_sleep_runtime,
@@ -64,10 +65,10 @@ static void print_rq(struct seq_file *m, struct rq *rq, int rq_cpu)
         "\nrunnable tasks:\n"
         "            task   PID        tree-key         delta       waiting"
         "  switches  prio"
-        "        sum-exec        sum-wait       sum-sleep"
+        "    exec-runtime        sum-exec        sum-wait       sum-sleep"
         "    wait-overrun   wait-underrun\n"
         "------------------------------------------------------------------"
-        "----------------"
+        "--------------------------------"
         "------------------------------------------------"
         "--------------------------------\n");
 
@@ -108,6 +109,11 @@ print_cfs_rq_runtime_sum(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq)
 
 void print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq)
 {
+        s64 MIN_vruntime = -1, max_vruntime = -1, spread;
+        struct rq *rq = &per_cpu(runqueues, cpu);
+        struct sched_entity *last;
+        unsigned long flags;
+
         SEQ_printf(m, "\ncfs_rq\n");
 
 #define P(x) \
@@ -115,6 +121,23 @@ void print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq)
 
         P(fair_clock);
         P(exec_clock);
+        P(min_vruntime);
+
+        spin_lock_irqsave(&rq->lock, flags);
+        if (cfs_rq->rb_leftmost)
+                MIN_vruntime = (__pick_next_entity(cfs_rq))->vruntime;
+        last = __pick_last_entity(cfs_rq);
+        if (last)
+                max_vruntime = last->vruntime;
+        spin_unlock_irqrestore(&rq->lock, flags);
+        SEQ_printf(m, "  .%-30s: %Ld\n", "MIN_vruntime",
+                        (long long)MIN_vruntime);
+        SEQ_printf(m, "  .%-30s: %Ld\n", "max_vruntime",
+                        (long long)max_vruntime);
+        spread = max_vruntime - MIN_vruntime;
+        SEQ_printf(m, "  .%-30s: %Ld\n", "spread",
+                        (long long)spread);
+
         P(wait_runtime);
         P(wait_runtime_overruns);
         P(wait_runtime_underruns);
@@ -243,6 +266,7 @@ void proc_sched_show_task(struct task_struct *p, struct seq_file *m)
         P(se.wait_start_fair);
         P(se.exec_start);
         P(se.sleep_start_fair);
+        P(se.vruntime);
         P(se.sum_exec_runtime);
 
 #ifdef CONFIG_SCHEDSTATS