diff options
| author | Mike Galbraith <efault@gmx.de> | 2009-03-10 19:08:11 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-03-11 11:31:50 +0100 |
| commit | df1c99d416500da8d26a4d78777467c53ee7689e (patch) | |
| tree | 4f61ea769c43bfc985b760649d2c4ba5089ff608 /init | |
| parent | 57310a98a354e84279d7c8af2f48805a62372e53 (diff) | |
| download | op-kernel-dev-df1c99d416500da8d26a4d78777467c53ee7689e.zip op-kernel-dev-df1c99d416500da8d26a4d78777467c53ee7689e.tar.gz | |
sched: add avg_overlap decay
Impact: more precise avg_overlap metric - better load-balancing
avg_overlap is used to measure the runtime overlap of the waker and
wakee.
However, when a process changes behaviour, eg a pipe becomes
un-congested and we don't need to go to sleep after a wakeup
for a while, the avg_overlap value grows stale.
When running we use the avg runtime between preemption as a
measure for avg_overlap since the amount of runtime can be
correlated to cache footprint.
The longer we run, the less likely we'll be wanting to be
migrated to another CPU.
Signed-off-by: Mike Galbraith <efault@gmx.de>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1236709131.25234.576.camel@laptop>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'init')
0 files changed, 0 insertions, 0 deletions
