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Message-Id: <1404404770-323-13-git-send-email-morten.rasmussen@arm.com>
Date: Thu, 3 Jul 2014 17:25:59 +0100
From: Morten Rasmussen <morten.rasmussen@....com>
To: linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
peterz@...radead.org, mingo@...nel.org
Cc: rjw@...ysocki.net, vincent.guittot@...aro.org,
daniel.lezcano@...aro.org, preeti@...ux.vnet.ibm.com,
Dietmar.Eggemann@....com, pjt@...gle.com
Subject: [RFCv2 PATCH 12/23] sched: Rename weighted_cpuload() to cpu_load()
From: Dietmar Eggemann <dietmar.eggemann@....com>
The function weighted_cpuload() is the only one in the group of load
related functions used in the scheduler load balancing code
(weighted_cpuload(), source_load(), target_load(), task_h_load()) which
carries an explicit 'weighted' identifier in its name. Get rid of this
'weighted' identifier since following patches will introduce a
weighted/unweighted switch as an argument for these functions.
Signed-off-by: Dietmar Eggemann <dietmar.eggemann@....com>
---
kernel/sched/fair.c | 33 +++++++++++++++++----------------
1 file changed, 17 insertions(+), 16 deletions(-)
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 93c8dbe..784fdab 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -1014,7 +1014,7 @@ bool should_numa_migrate_memory(struct task_struct *p, struct page * page,
return group_faults(p, dst_nid) < (group_faults(p, src_nid) * 3 / 4);
}
-static unsigned long weighted_cpuload(const int cpu);
+static unsigned long cpu_load(const int cpu);
static unsigned long source_load(int cpu, int type);
static unsigned long target_load(int cpu, int type);
static unsigned long capacity_of(int cpu);
@@ -1045,7 +1045,7 @@ static void update_numa_stats(struct numa_stats *ns, int nid)
struct rq *rq = cpu_rq(cpu);
ns->nr_running += rq->nr_running;
- ns->load += weighted_cpuload(cpu);
+ ns->load += cpu_load(cpu);
ns->compute_capacity += capacity_of(cpu);
cpus++;
@@ -4036,7 +4036,7 @@ static void dequeue_task_fair(struct rq *rq, struct task_struct *p, int flags)
#ifdef CONFIG_SMP
/* Used instead of source_load when we know the type == 0 */
-static unsigned long weighted_cpuload(const int cpu)
+static unsigned long cpu_load(const int cpu)
{
return cpu_rq(cpu)->cfs.runnable_load_avg;
}
@@ -4051,7 +4051,7 @@ static unsigned long weighted_cpuload(const int cpu)
static unsigned long source_load(int cpu, int type)
{
struct rq *rq = cpu_rq(cpu);
- unsigned long total = weighted_cpuload(cpu);
+ unsigned long total = cpu_load(cpu);
if (type == 0 || !sched_feat(LB_BIAS))
return total;
@@ -4066,7 +4066,7 @@ static unsigned long source_load(int cpu, int type)
static unsigned long target_load(int cpu, int type)
{
struct rq *rq = cpu_rq(cpu);
- unsigned long total = weighted_cpuload(cpu);
+ unsigned long total = cpu_load(cpu);
if (type == 0 || !sched_feat(LB_BIAS))
return total;
@@ -4433,7 +4433,7 @@ find_idlest_cpu(struct sched_group *group, struct task_struct *p, int this_cpu)
/* Traverse only the allowed CPUs */
for_each_cpu_and(i, sched_group_cpus(group), tsk_cpus_allowed(p)) {
- load = weighted_cpuload(i);
+ load = cpu_load(i);
if (load < min_load || (load == min_load && i == this_cpu)) {
min_load = load;
@@ -5926,7 +5926,7 @@ static inline void update_sg_lb_stats(struct lb_env *env,
sgs->nr_numa_running += rq->nr_numa_running;
sgs->nr_preferred_running += rq->nr_preferred_running;
#endif
- sgs->sum_weighted_load += weighted_cpuload(i);
+ sgs->sum_weighted_load += cpu_load(i);
if (idle_cpu(i))
sgs->idle_cpus++;
}
@@ -6388,7 +6388,7 @@ static struct rq *find_busiest_queue(struct lb_env *env,
int i;
for_each_cpu_and(i, sched_group_cpus(group), env->cpus) {
- unsigned long capacity, capacity_factor, wl;
+ unsigned long capacity, capacity_factor, load;
enum fbq_type rt;
rq = cpu_rq(i);
@@ -6421,28 +6421,29 @@ static struct rq *find_busiest_queue(struct lb_env *env,
if (!capacity_factor)
capacity_factor = fix_small_capacity(env->sd, group);
- wl = weighted_cpuload(i);
+ load = cpu_load(i);
/*
- * When comparing with imbalance, use weighted_cpuload()
+ * When comparing with imbalance, use cpu_load()
* which is not scaled with the cpu capacity.
*/
- if (capacity_factor && rq->nr_running == 1 && wl > env->imbalance)
+ if (capacity_factor && rq->nr_running == 1 &&
+ load > env->imbalance)
continue;
/*
* For the load comparisons with the other cpu's, consider
- * the weighted_cpuload() scaled with the cpu capacity, so
+ * the cpu_load() scaled with the cpu capacity, so
* that the load can be moved away from the cpu that is
* potentially running at a lower capacity.
*
- * Thus we're looking for max(wl_i / capacity_i), crosswise
+ * Thus we're looking for max(load_i / capacity_i), crosswise
* multiplication to rid ourselves of the division works out
- * to: wl_i * capacity_j > wl_j * capacity_i; where j is
+ * to: load_i * capacity_j > load_j * capacity_i; where j is
* our previous maximum.
*/
- if (wl * busiest_capacity > busiest_load * capacity) {
- busiest_load = wl;
+ if (load * busiest_capacity > busiest_load * capacity) {
+ busiest_load = load;
busiest_capacity = capacity;
busiest = rq;
}
--
1.7.9.5
--
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