sched: Maintain per-rq runnable averages

Since runqueues do not have a corresponding sched_entity we instead embed a
sched_avg structure directly.

Signed-off-by: Ben Segall <bsegall@google.com>
Reviewed-by: Paul Turner <pjt@google.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/20120823141506.442637130@google.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 files changed, 8 insertions, 2 deletions

diff --git a/kernel/sched/debug.c b/kernel/sched/debug.c
index 61f70979153a..4240abce4116 100644
--- a/kernel/sched/debug.c
+++ b/kernel/sched/debug.c
@@ -61,14 +61,20 @@ static unsigned long nsec_low(unsigned long long nsec)
 static void print_cfs_group_stats(struct seq_file *m, int cpu, struct task_group *tg)
 {
         struct sched_entity *se = tg->se[cpu];
-        if (!se)
-                return;
 
 #define P(F) \
         SEQ_printf(m, "  .%-30s: %lld\n", #F, (long long)F)
 #define PN(F) \
         SEQ_printf(m, "  .%-30s: %lld.%06ld\n", #F, SPLIT_NS((long long)F))
 
+        if (!se) {
+                struct sched_avg *avg = &cpu_rq(cpu)->avg;
+                P(avg->runnable_avg_sum);
+                P(avg->runnable_avg_period);
+                return;
+        }
+
+
         PN(se->exec_start);
         PN(se->vruntime);
         PN(se->sum_exec_runtime);