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cpufreq / sched: Pass runqueue pointer to cpufreq_update_util()

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All of the callers of cpufreq_update_util() pass rq_clock(rq) to it
as the time argument and some of them check whether or not cpu_of(rq)
is equal to smp_processor_id() before calling it, so rework it to
take a runqueue pointer as the argument and move the rq_clock(rq)
evaluation into it.

Additionally, provide a wrapper checking cpu_of(rq) against
smp_processor_id() for the cpufreq_update_util() callers that
need it.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
This commit is contained in:
Rafael J. Wysocki 2016-08-10 03:11:17 +02:00
parent 58919e83c8
commit 12bde33dbb
4 changed files with 15 additions and 15 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

3
kernel/sched/deadline.c
View file

@ -736,8 +736,7 @@ static void update_curr_dl(struct rq *rq)
}
/* kick cpufreq (see the comment in kernel/sched/sched.h). */
if (cpu_of(rq) == smp_processor_id())
cpufreq_update_util(rq_clock(rq), SCHED_CPUFREQ_DL);
cpufreq_update_this_cpu(rq, SCHED_CPUFREQ_DL);
schedstat_set(curr->se.statistics.exec_max,
max(curr->se.statistics.exec_max, delta_exec));

9
kernel/sched/fair.c
View file

@ -2876,8 +2876,6 @@ static inline void update_tg_load_avg(struct cfs_rq *cfs_rq, int force) {}
static inline void cfs_rq_util_change(struct cfs_rq *cfs_rq)
{
if (&this_rq()->cfs == cfs_rq) {
struct rq *rq = rq_of(cfs_rq);
/*
* There are a few boundary cases this might miss but it should
* get called often enough that that should (hopefully) not be
@ -2894,7 +2892,7 @@ static inline void cfs_rq_util_change(struct cfs_rq *cfs_rq)
*
* See cpu_util().
*/
cpufreq_update_util(rq_clock(rq), 0);
cpufreq_update_util(rq_of(cfs_rq), 0);
}
}
@ -3155,10 +3153,7 @@ update_cfs_rq_load_avg(u64 now, struct cfs_rq *cfs_rq, bool update_freq)
static inline void update_load_avg(struct sched_entity *se, int not_used)
{
struct cfs_rq *cfs_rq = cfs_rq_of(se);
struct rq *rq = rq_of(cfs_rq);
cpufreq_update_util(rq_clock(rq), 0);
cpufreq_update_util(rq_of(cfs_rq_of(se)), 0);
}
static inline void

3
kernel/sched/rt.c
View file

@ -958,8 +958,7 @@ static void update_curr_rt(struct rq *rq)
return;
/* Kick cpufreq (see the comment in kernel/sched/sched.h). */
if (cpu_of(rq) == smp_processor_id())
cpufreq_update_util(rq_clock(rq), SCHED_CPUFREQ_RT);
cpufreq_update_this_cpu(rq, SCHED_CPUFREQ_RT);
schedstat_set(curr->se.statistics.exec_max,
max(curr->se.statistics.exec_max, delta_exec));

15
kernel/sched/sched.h
View file

@ -1763,7 +1763,7 @@ DECLARE_PER_CPU(struct update_util_data *, cpufreq_update_util_data);
/**
* cpufreq_update_util - Take a note about CPU utilization changes.
* @time: Current time.
* @rq: Runqueue to carry out the update for.
* @flags: Update reason flags.
*
* This function is called by the scheduler on the CPU whose utilization is
@ -1783,16 +1783,23 @@ DECLARE_PER_CPU(struct update_util_data *, cpufreq_update_util_data);
* but that really is a band-aid. Going forward it should be replaced with
* solutions targeted more specifically at RT and DL tasks.
*/
static inline void cpufreq_update_util(u64 time, unsigned int flags)
static inline void cpufreq_update_util(struct rq *rq, unsigned int flags)
{
struct update_util_data *data;
data = rcu_dereference_sched(*this_cpu_ptr(&cpufreq_update_util_data));
if (data)
data->func(data, time, flags);
data->func(data, rq_clock(rq), flags);
}
static inline void cpufreq_update_this_cpu(struct rq *rq, unsigned int flags)
{
if (cpu_of(rq) == smp_processor_id())
cpufreq_update_util(rq, flags);
}
#else
static inline void cpufreq_update_util(u64 time, unsigned int flags) {}
static inline void cpufreq_update_util(struct rq *rq, unsigned int flags) {}
static inline void cpufreq_update_this_cpu(struct rq *rq, unsigned int flags) {}
#endif /* CONFIG_CPU_FREQ */
#ifdef arch_scale_freq_capacity