sched: batch sleeper bonus
authorIngo Molnar <mingo@elte.hu>
Thu, 9 Aug 2007 09:16:45 +0000 (11:16 +0200)
committerIngo Molnar <mingo@elte.hu>
Thu, 9 Aug 2007 09:16:45 +0000 (11:16 +0200)
batch up the sleeper bonus sum a bit more. Anything below
sched-granularity is too small to make a practical difference
anyway.

this optimization reduces the math in high-frequency scheduling
scenarios.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
kernel/sched_fair.c

index 6f579ff5a9bc93abd215cda93d9d7b9617ce7f4c..9f401588d50913825e25971ace3e5602f90f0e26 100644 (file)
@@ -300,7 +300,7 @@ __update_curr(struct cfs_rq *cfs_rq, struct sched_entity *curr, u64 now)
        delta_fair = calc_delta_fair(delta_exec, lw);
        delta_mine = calc_delta_mine(delta_exec, curr->load.weight, lw);
 
-       if (cfs_rq->sleeper_bonus > sysctl_sched_stat_granularity) {
+       if (cfs_rq->sleeper_bonus > sysctl_sched_granularity) {
                delta = calc_delta_mine(cfs_rq->sleeper_bonus,
                                        curr->load.weight, lw);
                if (unlikely(delta > cfs_rq->sleeper_bonus))