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authorPeter Zijlstra <a.p.zijlstra@chello.nl>2008-06-27 13:41:38 +0200
committerIngo Molnar <mingo@elte.hu>2008-06-27 14:31:47 +0200
commitf1d239f73200a5803a89e5929fb3abc1596b7589 (patch)
tree33c59b6f2621284af91825ea7fbab718ffe65ade /kernel/sched.c
parent83378269a5fad98f562ebc0f09c349575e6cbfe1 (diff)
downloadop-kernel-dev-f1d239f73200a5803a89e5929fb3abc1596b7589.zip
op-kernel-dev-f1d239f73200a5803a89e5929fb3abc1596b7589.tar.gz
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 01d3e51..7613f69 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -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;
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