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 */