[PATCH] sched: balance timers

Do CPU load averaging over a number of different intervals.  Allow each
interval to be chosen by sending a parameter to source_load and target_load.
0 is instantaneous, idx > 0 returns a decaying average with the most recent
sample weighted at 2^(idx-1).  To a maximum of 3 (could be easily increased).

So generally a higher number will result in more conservative balancing.

Signed-off-by: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/include/linux/sched.h b/include/linux/sched.h
index 2c69682b0444..664981ac1fb6 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -488,6 +488,10 @@ struct sched_domain {
         unsigned long long cache_hot_time; /* Task considered cache hot (ns) */
         unsigned int cache_nice_tries;  /* Leave cache hot tasks for # tries */
         unsigned int per_cpu_gain;      /* CPU % gained by adding domain cpus */
+        unsigned int busy_idx;
+        unsigned int idle_idx;
+        unsigned int newidle_idx;
+        unsigned int wake_idx;
         int flags;                      /* See SD_* */
 
         /* Runtime fields. */