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authorPeter Zijlstra <a.p.zijlstra@chello.nl>2008-06-27 07:41:38 -0400
committerIngo Molnar <mingo@elte.hu>2008-06-27 08:31:47 -0400
commitf1d239f73200a5803a89e5929fb3abc1596b7589 (patch)
tree33c59b6f2621284af91825ea7fbab718ffe65ade /kernel/sched.c
parent83378269a5fad98f562ebc0f09c349575e6cbfe1 (diff)
sched: incremental effective_load()
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>
Diffstat (limited to 'kernel/sched.c')
-rw-r--r--kernel/sched.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/kernel/sched.c b/kernel/sched.c
index 01d3e51b7116..7613f69f0978 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -427,6 +427,11 @@ struct cfs_rq {
427 * this cpu's part of tg->shares 427 * this cpu's part of tg->shares
428 */ 428 */
429 unsigned long shares; 429 unsigned long shares;
430
431 /*
432 * load.weight at the time we set shares
433 */
434 unsigned long rq_weight;
430#endif 435#endif
431#endif 436#endif
432}; 437};
@@ -1527,6 +1532,7 @@ __update_group_shares_cpu(struct task_group *tg, int cpu,
1527 * record the actual number of shares, not the boosted amount. 1532 * record the actual number of shares, not the boosted amount.
1528 */ 1533 */
1529 tg->cfs_rq[cpu]->shares = boost ? 0 : shares; 1534 tg->cfs_rq[cpu]->shares = boost ? 0 : shares;
1535 tg->cfs_rq[cpu]->rq_weight = rq_weight;
1530 1536
1531 if (shares < MIN_SHARES) 1537 if (shares < MIN_SHARES)
1532 shares = MIN_SHARES; 1538 shares = MIN_SHARES;