Thread (66 messages) 66 messages, 8 authors, 2014-07-18

[PATCH v3 06/12] sched: add per rq cpu_power_orig

From: Amit Kucheria <hidden>
Date: 2014-07-09 07:50:46
Also in: lkml

On Mon, Jun 30, 2014 at 6:05 PM, Vincent Guittot
[off-list ref] wrote:
This new field cpu_power_orig reflects the available capacity of a CPUs unlike
the cpu_power which reflects the current capacity that can be altered by
frequency and rt tasks.
s/cpu_power/cpu_capacity
quoted hunk ↗ jump to hunk
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 54f5722..92dd6d1 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -6964,7 +6964,7 @@ 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 f0bba5f..7dff578 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -5671,6 +5671,7 @@ 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 2f86361..7b311de 100644
--- a/kernel/sched/sched.h
+++ b/kernel/sched/sched.h
@@ -568,6 +568,7 @@ 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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