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| author | Jeff Ohlstein <johlstei@codeaurora.org> | 2012-06-19 15:59:46 -0700 |
|---|---|---|
| committer | David Keitel <dkeitel@codeaurora.org> | 2016-03-23 20:01:32 -0700 |
| commit | b0ccf5db311522b91cb770ce4c245a3f029b4ad5 (patch) | |
| tree | 81461a97d9df18f34b75d37f90149b8718609dbf /include/linux/sched.h | |
| parent | f4a6c4e3279218b9212a89b710b127b76cde8c4c (diff) | |
sched_avg: add run queue averaging
Add code to calculate the run queue depth of a cpu and iowait
depth of the cpu.
The scheduler calls in to sched_update_nr_prod whenever there
is a runqueue change. This function maintains the runqueue average
and the iowait of that cpu in that time interval.
Whoever wants to know the runqueue average is expected to call
sched_get_nr_running_avg periodically to get the accumulated
runqueue and iowait averages for all the cpus.
Change-Id: Id8cb2ecf0ed479f090a83ccb72dd59c53fa73e0c
Signed-off-by: Jeff Ohlstein <johlstei@codeaurora.org>
(cherry picked from commit 0299fcaaad80e2c0ac9aa583c95107f6edc27750)
[rameezmustafa@codeaurora.org: Port to msm-3.18]
Signed-off-by: Syed Rameez Mustafa <rameezmustafa@codeaurora.org>
Diffstat (limited to 'include/linux/sched.h')
| -rw-r--r-- | include/linux/sched.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h index d9879da4b777..3be9ca55987a 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -174,6 +174,9 @@ extern unsigned long nr_iowait(void); extern unsigned long nr_iowait_cpu(int cpu); extern void get_iowait_load(unsigned long *nr_waiters, unsigned long *load); +extern void sched_update_nr_prod(int cpu, unsigned long nr, bool inc); +extern void sched_get_nr_running_avg(int *avg, int *iowait_avg); + extern void calc_global_load(unsigned long ticks); #if defined(CONFIG_SMP) && defined(CONFIG_NO_HZ_COMMON) |