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Message-Id: <1431570135-12838-4-git-send-email-yuyang.du@intel.com>
Date: Thu, 14 May 2015 10:22:14 +0800
From: Yuyang Du <yuyang.du@...el.com>
To: mingo@...nel.org, peterz@...radead.org,
linux-kernel@...r.kernel.org
Cc: pjt@...gle.com, bsegall@...gle.com, morten.rasmussen@....com,
vincent.guittot@...aro.org, dietmar.eggemann@....com,
arjan.van.de.ven@...el.com, len.brown@...el.com,
fengguang.wu@...el.com, Yuyang Du <yuyang.du@...el.com>
Subject: [PATCH v7 3/4] sched: Init cfs_rq's sched_entity load average
The runnable load and utilization averages of cfs_rq's sched_entity were
not initiated. Like done to a task, give new cfs_rq' sched_entity
start values to heavy its load in infant time.
Signed-off-by: Yuyang Du <yuyang.du@...el.com>
---
kernel/sched/core.c | 2 +-
kernel/sched/fair.c | 13 +++++++------
kernel/sched/sched.h | 2 +-
3 files changed, 9 insertions(+), 8 deletions(-)
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index b4e6c21..f46992f 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -2102,7 +2102,7 @@ void wake_up_new_task(struct task_struct *p)
#endif
/* Initialize new task's runnable average */
- init_task_runnable_average(p);
+ init_entity_runnable_average(&p->se);
rq = __task_rq_lock(p);
activate_task(rq, p, 0);
p->on_rq = TASK_ON_RQ_QUEUED;
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 2a87012..962d40d 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -672,10 +672,10 @@ static unsigned long task_h_load(struct task_struct *p);
#define LOAD_AVG_MAX 47742 /* maximum possible load avg */
#define LOAD_AVG_MAX_N 345 /* number of full periods to produce LOAD_MAX_AVG */
-/* Give new task start runnable values to heavy its load in infant time */
-void init_task_runnable_average(struct task_struct *p)
+/* Give new sched_entity start runnable values to heavy its load in infant time */
+void init_entity_runnable_average(struct sched_entity *se)
{
- struct sched_avg *sa = &p->se.avg;
+ struct sched_avg *sa = &se->avg;
sa->last_update_time = 0;
/*
@@ -684,14 +684,14 @@ void init_task_runnable_average(struct task_struct *p)
* will definitely be update (after enqueue).
*/
sa->period_contrib = 1023;
- sa->load_avg = p->se.load.weight;
- sa->load_sum = p->se.load.weight * LOAD_AVG_MAX;
+ sa->load_avg = se->load.weight;
+ sa->load_sum = se->load.weight * LOAD_AVG_MAX;
sa->util_avg = SCHED_LOAD_SCALE;
sa->util_sum = SCHED_LOAD_SCALE * LOAD_AVG_MAX;
/* when this task enqueue'ed, it will contribute to its cfs_rq's load_avg */
}
#else
-void init_task_runnable_average(struct task_struct *p)
+void init_entity_runnable_average(struct sched_entity *se)
{
}
#endif
@@ -7854,6 +7854,7 @@ int alloc_fair_sched_group(struct task_group *tg, struct task_group *parent)
init_cfs_rq(cfs_rq);
init_tg_cfs_entry(tg, cfs_rq, se, i, parent->se[i]);
+ init_entity_runnable_average(se);
}
return 1;
diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h
index 13ff009..08c9647 100644
--- a/kernel/sched/sched.h
+++ b/kernel/sched/sched.h
@@ -1288,7 +1288,7 @@ unsigned long to_ratio(u64 period, u64 runtime);
extern void update_idle_cpu_load(struct rq *this_rq);
-extern void init_task_runnable_average(struct task_struct *p);
+extern void init_entity_runnable_average(struct sched_entity *se);
static inline void add_nr_running(struct rq *rq, unsigned count)
{
--
1.7.9.5
--
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