From 648fc0392a3a9f0a47feaf10c7837eaa67ee694e Mon Sep 17 00:00:00 2001 From: Morten Rasmussen Date: Tue, 27 Jan 2015 13:48:07 +0000 Subject: sched, cpuidle: Track cpuidle state index in the scheduler The idle-state of each cpu is currently pointed to by rq->idle_state but there isn't any information in the struct cpuidle_state that can used to look up the idle-state energy model data stored in struct sched_group_energy. For this purpose is necessary to store the idle state index as well. Ideally, the idle-state data should be unified. cc: Ingo Molnar cc: Peter Zijlstra Signed-off-by: Morten Rasmussen --- kernel/sched/idle.c | 2 ++ kernel/sched/sched.h | 21 +++++++++++++++++++++ 2 files changed, 23 insertions(+) diff --git a/kernel/sched/idle.c b/kernel/sched/idle.c index 8986dafc75b3..5cc234b332bc 100644 --- a/kernel/sched/idle.c +++ b/kernel/sched/idle.c @@ -149,6 +149,7 @@ use_default: /* Take note of the planned idle state. */ idle_set_state(this_rq(), &drv->states[next_state]); + idle_set_state_idx(this_rq(), next_state); /* * Enter the idle state previously returned by the governor decision. @@ -159,6 +160,7 @@ use_default: /* The cpu is no longer idle or about to enter idle. */ idle_set_state(this_rq(), NULL); + idle_set_state_idx(this_rq(), -1); if (broadcast) clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_EXIT, &dev->cpu); diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h index e49cb6b85b90..42d1d8dff7c2 100644 --- a/kernel/sched/sched.h +++ b/kernel/sched/sched.h @@ -525,6 +525,7 @@ struct rq { #ifdef CONFIG_CPU_IDLE /* Must be inspected within a rcu lock section */ struct cpuidle_state *idle_state; + int idle_state_idx; #endif }; @@ -1101,6 +1102,17 @@ static inline struct cpuidle_state *idle_get_state(struct rq *rq) WARN_ON(!rcu_read_lock_held()); return rq->idle_state; } + +static inline void idle_set_state_idx(struct rq *rq, int idle_state_idx) +{ + rq->idle_state_idx = idle_state_idx; +} + +static inline int idle_get_state_idx(struct rq *rq) +{ + WARN_ON(!rcu_read_lock_held()); + return rq->idle_state_idx; +} #else static inline void idle_set_state(struct rq *rq, struct cpuidle_state *idle_state) @@ -1111,6 +1123,15 @@ static inline struct cpuidle_state *idle_get_state(struct rq *rq) { return NULL; } + +static inline void idle_set_state_idx(struct rq *rq, int idle_state_idx) +{ +} + +static inline int idle_get_state_idx(struct rq *rq) +{ + return -1; +} #endif extern void sysrq_sched_debug_show(void); -- cgit v1.2.3