diff options
| author | Sai Charan Gurrappadi <sgurrappadi@nvidia.com> | 2012-07-25 08:37:14 -0700 |
|---|---|---|
| committer | Varun Colbert <vcolbert@nvidia.com> | 2012-08-24 19:08:13 -0700 |
| commit | a1c9f879ab8da0c4fc0a9c75791de5ada0a2ffba (patch) | |
| tree | 31cbfc68eac194d7e769c7c166bcb9feefd58771 /kernel | |
| parent | 7d1d0e913d5c5a93a5f30b6508ae3cf66e3da92b (diff) | |
cpuquiet: Runnable threads governor
[perf] The runnable threads governor only looks at the average number of
runnables in the system to make a decision when bringing cores
offline/online. First pass; tweaks thresholds and delays to reduce
decision latency to about ~50-70ms per core (from ~100-150ms per core)
Change-Id: Idd3b268a74a8f56ad3fc0e5c7f388174d1b6611f
Signed-off-by: Sai Charan Gurrappadi <sgurrappadi@nvidia.com>
Reviewed-on: http://git-master/r/124679
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Diwakar Tundlam <dtundlam@nvidia.com>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/sched/core.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index eb15edd08a23..b8f4618407b2 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -2188,6 +2188,18 @@ unsigned long avg_nr_running(void) return sum; } +unsigned long get_avg_nr_running(unsigned int cpu) +{ + struct rq *q; + + if (cpu >= nr_cpu_ids) + return 0; + + q = cpu_rq(cpu); + + return q->ave_nr_running; +} + /* * Global load-average calculations * |