sched: Aggregate total task_group load

Maintain a global running sum of the average load seen on each cfs_rq belonging
to each task group so that it may be used in calculating an appropriate
shares:weight distribution.

Signed-off-by: Paul Turner <pjt@google.com>
Reviewed-by: Ben Segall <bsegall@google.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/20120823141506.792901086@google.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h
index 30236ab4edc0..924a99094888 100644
--- a/kernel/sched/sched.h
+++ b/kernel/sched/sched.h
@@ -112,6 +112,7 @@ struct task_group {
         unsigned long shares;
 
         atomic_t load_weight;
+        atomic64_t load_avg;
 #endif
 
 #ifdef CONFIG_RT_GROUP_SCHED
@@ -232,6 +233,9 @@ struct cfs_rq {
         u64 runnable_load_avg, blocked_load_avg;
         atomic64_t decay_counter, removed_load;
         u64 last_decay;
+#ifdef CONFIG_FAIR_GROUP_SCHED
+        u64 tg_load_contrib;
+#endif
 #endif
 #ifdef CONFIG_FAIR_GROUP_SCHED
         struct rq *rq;  /* cpu runqueue to which this cfs_rq is attached */