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sched: incremental effective_load()

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Increase the accuracy of the effective_load values.

Not only consider the current increment (as per the attempted wakeup), but
also consider the delta between when we last adjusted the shares and the
current situation.

Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com>
Cc: Mike Galbraith <efault@gmx.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Peter Zijlstra
2008-06-27 13:41:38 +02:00
committed by Ingo Molnar
parent 83378269a5
commit f1d239f732
2 changed files with 21 additions and 3 deletions
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6
kernel/sched.c
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@@ -427,6 +427,11 @@ struct cfs_rq {
* this cpu's part of tg->shares
*/
unsigned long shares;
/*
* load.weight at the time we set shares
*/
unsigned long rq_weight;
#endif
#endif
};
@@ -1527,6 +1532,7 @@ __update_group_shares_cpu(struct task_group *tg, int cpu,
* record the actual number of shares, not the boosted amount.
*/
tg->cfs_rq[cpu]->shares = boost ? 0 : shares;
tg->cfs_rq[cpu]->rq_weight = rq_weight;
if (shares < MIN_SHARES)
shares = MIN_SHARES;