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authorMel Gorman <mgorman@suse.de>2014-08-06 14:19:21 +0100
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2014-08-06 21:17:45 +0200
commit372ba8cb46b271a7662b92cbefedee56725f6bd0 (patch)
tree536013552cd845b4eb0559dc79c023ecc426c21e /kernel
parent64b4ca5cb6e1a9f577588db5765dc996ddf595e1 (diff)
downloadlinux-372ba8cb46b271a7662b92cbefedee56725f6bd0.tar.bz2
cpuidle: menu: Lookup CPU runqueues less
The menu governer makes separate lookups of the CPU runqueue to get load and number of IO waiters but it can be done with a single lookup. Signed-off-by: Mel Gorman <mgorman@suse.de> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/sched/core.c7
-rw-r--r--kernel/sched/proc.c7
2 files changed, 7 insertions, 7 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 3bdf01b494fe..863ef1d19563 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -2385,6 +2385,13 @@ unsigned long nr_iowait_cpu(int cpu)
return atomic_read(&this->nr_iowait);
}
+void get_iowait_load(unsigned long *nr_waiters, unsigned long *load)
+{
+ struct rq *this = this_rq();
+ *nr_waiters = atomic_read(&this->nr_iowait);
+ *load = this->cpu_load[0];
+}
+
#ifdef CONFIG_SMP
/*
diff --git a/kernel/sched/proc.c b/kernel/sched/proc.c
index 16f5a30f9c88..8ecd552fe4f2 100644
--- a/kernel/sched/proc.c
+++ b/kernel/sched/proc.c
@@ -8,13 +8,6 @@
#include "sched.h"
-unsigned long this_cpu_load(void)
-{
- struct rq *this = this_rq();
- return this->cpu_load[0];
-}
-
-
/*
* Global load-average calculations
*