linux-kernel - [PATCH 1/8] sched: introduce task_se_h

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Message-Id: <20190612193227.993-2-riel@surriel.com>
Date:   Wed, 12 Jun 2019 15:32:20 -0400
From:   Rik van Riel <riel@...riel.com>
To:     peterz@...radead.org
Cc:     mingo@...hat.com, linux-kernel@...r.kernel.org, kernel-team@...com,
        morten.rasmussen@....com, tglx@...utronix.de,
        dietmar.eggeman@....com, mgorman@...hsingularity.com,
        vincent.guittot@...aro.org, Rik van Riel <riel@...riel.com>
Subject: [PATCH 1/8] sched: introduce task_se_h_load helper

Sometimes the hierarchical load of a sched_entity needs to be calculated.
Split out task_h_load into a task_se_h_load that takes a sched_entity pointer
as its argument, and a task_h_load wrapper that calls task_se_h_load.

No functional changes.

Signed-off-by: Rik van Riel <riel@...riel.com>
---
 kernel/sched/fair.c | 17 ++++++++++++++---
 1 file changed, 14 insertions(+), 3 deletions(-)

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index f35930f5e528..df624f7a68e7 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -706,6 +706,7 @@ static u64 sched_vslice(struct cfs_rq *cfs_rq, struct sched_entity *se)
 #ifdef CONFIG_SMP
 
 static int select_idle_sibling(struct task_struct *p, int prev_cpu, int cpu);
+static unsigned long task_se_h_load(struct sched_entity *se);
 static unsigned long task_h_load(struct task_struct *p);
 static unsigned long capacity_of(int cpu);
 
@@ -7833,14 +7834,19 @@ static void update_cfs_rq_h_load(struct cfs_rq *cfs_rq)
 	}
 }
 
-static unsigned long task_h_load(struct task_struct *p)
+static unsigned long task_se_h_load(struct sched_entity *se)
 {
-	struct cfs_rq *cfs_rq = task_cfs_rq(p);
+	struct cfs_rq *cfs_rq = cfs_rq_of(se);
 
 	update_cfs_rq_h_load(cfs_rq);
-	return div64_ul(p->se.avg.load_avg * cfs_rq->h_load,
+	return div64_ul(se->avg.load_avg * cfs_rq->h_load,
 			cfs_rq_load_avg(cfs_rq) + 1);
 }
+
+static unsigned long task_h_load(struct task_struct *p)
+{
+	return task_se_h_load(&p->se);
+}
 #else
 static inline void update_blocked_averages(int cpu)
 {
@@ -7865,6 +7871,11 @@ static inline void update_blocked_averages(int cpu)
 	rq_unlock_irqrestore(rq, &rf);
 }
 
+static unsigned long task_se_h_load(struct sched_entity *se)
+{
+	return se->avg.load_avg;
+}
+
 static unsigned long task_h_load(struct task_struct *p)
 {
 	return p->se.avg.load_avg;
-- 
2.20.1