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Message-ID: <tip-c7132dd6f0e3b07bd4541cda9040897cc460d855@git.kernel.org>
Date: Thu, 10 Aug 2017 05:04:29 -0700
From: tip-bot for Viresh Kumar <tipbot@...or.com>
To: linux-tip-commits@...r.kernel.org
Cc: torvalds@...ux-foundation.org, viresh.kumar@...aro.org,
vincent.guittot@...aro.org, tglx@...utronix.de,
peterz@...radead.org, linux-kernel@...r.kernel.org,
mingo@...nel.org, hpa@...or.com
Subject: [tip:sched/core] sched/fair: Pass 'rq' to weighted_cpuload()
Commit-ID: c7132dd6f0e3b07bd4541cda9040897cc460d855
Gitweb: http://git.kernel.org/tip/c7132dd6f0e3b07bd4541cda9040897cc460d855
Author: Viresh Kumar <viresh.kumar@...aro.org>
AuthorDate: Wed, 24 May 2017 10:59:54 +0530
Committer: Ingo Molnar <mingo@...nel.org>
CommitDate: Thu, 10 Aug 2017 12:18:11 +0200
sched/fair: Pass 'rq' to weighted_cpuload()
weighted_cpuload() uses the cpu number passed to it get pointer to the
runqueue. Almost all callers of weighted_cpuload() already have the rq
pointer with them and can send that directly to weighted_cpuload(). In
some cases the callers actually get the CPU number by doing cpu_of(rq).
It would be simpler to pass rq to weighted_cpuload().
Signed-off-by: Viresh Kumar <viresh.kumar@...aro.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Vincent Guittot <vincent.guittot@...aro.org>
Cc: linaro-kernel@...ts.linaro.org
Link: http://lkml.kernel.org/r/b7720627e0576dc29b4ba3f9b6edbc913bb4f684.1495603536.git.viresh.kumar@linaro.org
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
kernel/sched/fair.c | 28 ++++++++++++++--------------
1 file changed, 14 insertions(+), 14 deletions(-)
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 139abf2..27d425e 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -1378,7 +1378,7 @@ bool should_numa_migrate_memory(struct task_struct *p, struct page * page,
group_faults_cpu(ng, src_nid) * group_faults(p, dst_nid) * 4;
}
-static unsigned long weighted_cpuload(const int cpu);
+static unsigned long weighted_cpuload(struct rq *rq);
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);
@@ -1409,7 +1409,7 @@ 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 += weighted_cpuload(rq);
ns->compute_capacity += capacity_of(cpu);
cpus++;
@@ -5125,9 +5125,9 @@ static void cpu_load_update(struct rq *this_rq, unsigned long this_load,
}
/* Used instead of source_load when we know the type == 0 */
-static unsigned long weighted_cpuload(const int cpu)
+static unsigned long weighted_cpuload(struct rq *rq)
{
- return cfs_rq_runnable_load_avg(&cpu_rq(cpu)->cfs);
+ return cfs_rq_runnable_load_avg(&rq->cfs);
}
#ifdef CONFIG_NO_HZ_COMMON
@@ -5172,7 +5172,7 @@ static void cpu_load_update_idle(struct rq *this_rq)
/*
* bail if there's load or we're actually up-to-date.
*/
- if (weighted_cpuload(cpu_of(this_rq)))
+ if (weighted_cpuload(this_rq))
return;
cpu_load_update_nohz(this_rq, READ_ONCE(jiffies), 0);
@@ -5193,7 +5193,7 @@ void cpu_load_update_nohz_start(void)
* concurrently we'll exit nohz. And cpu_load write can race with
* cpu_load_update_idle() but both updater would be writing the same.
*/
- this_rq->cpu_load[0] = weighted_cpuload(cpu_of(this_rq));
+ this_rq->cpu_load[0] = weighted_cpuload(this_rq);
}
/*
@@ -5209,7 +5209,7 @@ void cpu_load_update_nohz_stop(void)
if (curr_jiffies == this_rq->last_load_update_tick)
return;
- load = weighted_cpuload(cpu_of(this_rq));
+ load = weighted_cpuload(this_rq);
rq_lock(this_rq, &rf);
update_rq_clock(this_rq);
cpu_load_update_nohz(this_rq, curr_jiffies, load);
@@ -5235,7 +5235,7 @@ static void cpu_load_update_periodic(struct rq *this_rq, unsigned long load)
*/
void cpu_load_update_active(struct rq *this_rq)
{
- unsigned long load = weighted_cpuload(cpu_of(this_rq));
+ unsigned long load = weighted_cpuload(this_rq);
if (tick_nohz_tick_stopped())
cpu_load_update_nohz(this_rq, READ_ONCE(jiffies), load);
@@ -5253,7 +5253,7 @@ void cpu_load_update_active(struct rq *this_rq)
static unsigned long source_load(int cpu, int type)
{
struct rq *rq = cpu_rq(cpu);
- unsigned long total = weighted_cpuload(cpu);
+ unsigned long total = weighted_cpuload(rq);
if (type == 0 || !sched_feat(LB_BIAS))
return total;
@@ -5268,7 +5268,7 @@ 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 = weighted_cpuload(rq);
if (type == 0 || !sched_feat(LB_BIAS))
return total;
@@ -5290,7 +5290,7 @@ static unsigned long cpu_avg_load_per_task(int cpu)
{
struct rq *rq = cpu_rq(cpu);
unsigned long nr_running = READ_ONCE(rq->cfs.h_nr_running);
- unsigned long load_avg = weighted_cpuload(cpu);
+ unsigned long load_avg = weighted_cpuload(rq);
if (nr_running)
return load_avg / nr_running;
@@ -5550,7 +5550,7 @@ find_idlest_cpu(struct sched_group *group, struct task_struct *p, int this_cpu)
shallowest_idle_cpu = i;
}
} else if (shallowest_idle_cpu == -1) {
- load = weighted_cpuload(i);
+ load = weighted_cpuload(cpu_rq(i));
if (load < min_load || (load == min_load && i == this_cpu)) {
min_load = load;
least_loaded_cpu = i;
@@ -7363,7 +7363,7 @@ 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 += weighted_cpuload(rq);
/*
* No need to call idle_cpu() if nr_running is not 0
*/
@@ -7892,7 +7892,7 @@ static struct rq *find_busiest_queue(struct lb_env *env,
capacity = capacity_of(i);
- wl = weighted_cpuload(i);
+ wl = weighted_cpuload(rq);
/*
* When comparing with imbalance, use weighted_cpuload()
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