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sched: batch sleeper bonus 

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>
This commit is contained in:
Ingo Molnar 2007-08-09 11:16:45 +02:00
parent 4a2a4df7b6
commit 0915c4e89d
1 changed files with 1 additions and 1 deletions
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2
kernel/sched_fair.c
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@ -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_fair = calc_delta_fair(delta_exec, lw);
delta_mine = calc_delta_mine(delta_exec, curr->load.weight, 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, delta = calc_delta_mine(cfs_rq->sleeper_bonus,
curr->load.weight, lw); curr->load.weight, lw);
if (unlikely(delta > cfs_rq->sleeper_bonus)) if (unlikely(delta > cfs_rq->sleeper_bonus))