redonkable
/
alistair23-linux
1
0
Fork 0
Code Releases Activity

sched/fair: Remove rq's runnable avg 

The current rq->avg is not used at all since its merge into the kernel,
and the code is in the scheduler's hot path, so remove it.

Tested-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
Signed-off-by: Yuyang Du <yuyang.du@intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: arjan@linux.intel.com
Cc: bsegall@google.com
Cc: fengguang.wu@intel.com
Cc: len.brown@intel.com
Cc: morten.rasmussen@arm.com
Cc: pjt@google.com
Cc: rafael.j.wysocki@intel.com
Cc: umgwanakikbuti@gmail.com
Cc: vincent.guittot@linaro.org
Link: http://lkml.kernel.org/r/1436918682-4971-2-git-send-email-yuyang.du@intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
hifive-unleashed-5.1
Yuyang Du 2015-07-15 08:04:36 +08:00 committed by Ingo Molnar
parent d308b9f1e4
commit cd126afe83
3 changed files with 5 additions and 29 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
kernel/sched/debug.c
View File

@ -68,13 +68,8 @@ static void print_cfs_group_stats(struct seq_file *m, int cpu, struct task_group
#define PN(F) \
SEQ_printf(m, " .%-30s: %lld.%06ld\n", #F, SPLIT_NS((long long)F))
if (!se) {
struct sched_avg *avg = &cpu_rq(cpu)->avg;
P(avg->runnable_avg_sum);
P(avg->avg_period);
if (!se)
return;
}
PN(se->exec_start);
PN(se->vruntime);

25
kernel/sched/fair.c
View File

@ -2724,19 +2724,12 @@ static inline void __update_group_entity_contrib(struct sched_entity *se)
}
}
static inline void update_rq_runnable_avg(struct rq *rq, int runnable)
{
__update_entity_runnable_avg(rq_clock_task(rq), cpu_of(rq), &rq->avg,
runnable, runnable);
__update_tg_runnable_avg(&rq->avg, &rq->cfs);
}
#else /* CONFIG_FAIR_GROUP_SCHED */
static inline void __update_cfs_rq_tg_load_contrib(struct cfs_rq *cfs_rq,
int force_update) {}
static inline void __update_tg_runnable_avg(struct sched_avg *sa,
struct cfs_rq *cfs_rq) {}
static inline void __update_group_entity_contrib(struct sched_entity *se) {}
static inline void update_rq_runnable_avg(struct rq *rq, int runnable) {}
#endif /* CONFIG_FAIR_GROUP_SCHED */
static inline void __update_task_entity_contrib(struct sched_entity *se)
@ -2940,7 +2933,6 @@ static inline void dequeue_entity_load_avg(struct cfs_rq *cfs_rq,
*/
void idle_enter_fair(struct rq *this_rq)
{
update_rq_runnable_avg(this_rq, 1);
}
/*
@ -2950,7 +2942,6 @@ void idle_enter_fair(struct rq *this_rq)
*/
void idle_exit_fair(struct rq *this_rq)
{
update_rq_runnable_avg(this_rq, 0);
}
static int idle_balance(struct rq *this_rq);
@ -2959,7 +2950,6 @@ static int idle_balance(struct rq *this_rq);
static inline void update_entity_load_avg(struct sched_entity *se,
int update_cfs_rq) {}
static inline void update_rq_runnable_avg(struct rq *rq, int runnable) {}
static inline void enqueue_entity_load_avg(struct cfs_rq *cfs_rq,
struct sched_entity *se,
int wakeup) {}
@ -4258,10 +4248,9 @@ enqueue_task_fair(struct rq *rq, struct task_struct *p, int flags)
update_entity_load_avg(se, 1);
}
if (!se) {
update_rq_runnable_avg(rq, rq->nr_running);
if (!se)
add_nr_running(rq, 1);
}
hrtick_update(rq);
}
@ -4319,10 +4308,9 @@ static void dequeue_task_fair(struct rq *rq, struct task_struct *p, int flags)
update_entity_load_avg(se, 1);
}
if (!se) {
if (!se)
sub_nr_running(rq, 1);
update_rq_runnable_avg(rq, 1);
}
hrtick_update(rq);
}
@ -6005,9 +5993,6 @@ static void __update_blocked_averages_cpu(struct task_group *tg, int cpu)
*/
if (!se->avg.runnable_avg_sum && !cfs_rq->nr_running)
list_del_leaf_cfs_rq(cfs_rq);
} else {
struct rq *rq = rq_of(cfs_rq);
update_rq_runnable_avg(rq, rq->nr_running);
}
}
@ -7988,8 +7973,6 @@ static void task_tick_fair(struct rq *rq, struct task_struct *curr, int queued)
if (numabalancing_enabled)
task_tick_numa(rq, curr);
update_rq_runnable_avg(rq, 1);
}
/*

2
kernel/sched/sched.h
View File

@ -595,8 +595,6 @@ struct rq {
#ifdef CONFIG_FAIR_GROUP_SCHED
/* list of leaf cfs_rq on this cpu: */
struct list_head leaf_cfs_rq_list;
struct sched_avg avg;
#endif /* CONFIG_FAIR_GROUP_SCHED */
/*