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Subject[PATCH 06/12] sched: add per rq cpu_capacity_orig
Date
This new field cpu_capacity_orig reflects the available capacity of a CPUs
unlike the cpu_capacity which reflects the current capacity that can be altered
by frequency and rt tasks.

Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org>
---
kernel/sched/core.c | 2 +-
kernel/sched/fair.c | 1 +
kernel/sched/sched.h | 1 +
3 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index e1a2f31..fc5a275 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -6976,7 +6976,7 @@ void __init sched_init(void)
#ifdef CONFIG_SMP
rq->sd = NULL;
rq->rd = NULL;
- rq->cpu_capacity = SCHED_CAPACITY_SCALE;
+ rq->cpu_capacity = rq->cpu_capacity_orig = SCHED_CAPACITY_SCALE;
rq->post_schedule = 0;
rq->active_balance = 0;
rq->next_balance = jiffies;
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 00ff5f3..f6258bc 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -5693,6 +5693,7 @@ static void update_cpu_capacity(struct sched_domain *sd, int cpu)

capacity >>= SCHED_CAPACITY_SHIFT;

+ cpu_rq(cpu)->cpu_capacity_orig = capacity;
sdg->sgc->capacity_orig = capacity;

if (sched_feat(ARCH_CAPACITY))
diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h
index 0191ed5..5a8ef50 100644
--- a/kernel/sched/sched.h
+++ b/kernel/sched/sched.h
@@ -571,6 +571,7 @@ struct rq {
struct sched_domain *sd;

unsigned long cpu_capacity;
+ unsigned long cpu_capacity_orig;

unsigned char idle_balance;
/* For active balancing */
--
1.9.1


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