Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934085AbbELTlX (ORCPT ); Tue, 12 May 2015 15:41:23 -0400 Received: from foss.arm.com ([217.140.101.70]:33997 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933972AbbELTi4 (ORCPT ); Tue, 12 May 2015 15:38:56 -0400 From: Morten Rasmussen To: peterz@infradead.org, mingo@redhat.com Cc: vincent.guittot@linaro.org, Dietmar Eggemann , yuyang.du@intel.com, preeti@linux.vnet.ibm.com, mturquette@linaro.org, rjw@rjwysocki.net, Juri Lelli , sgurrappadi@nvidia.com, pang.xunlei@zte.com.cn, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, morten.rasmussen@arm.com Subject: [RFCv4 PATCH 27/34] sched, cpuidle: Track cpuidle state index in the scheduler Date: Tue, 12 May 2015 20:39:02 +0100 Message-Id: <1431459549-18343-28-git-send-email-morten.rasmussen@arm.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1431459549-18343-1-git-send-email-morten.rasmussen@arm.com> References: <1431459549-18343-1-git-send-email-morten.rasmussen@arm.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2649 Lines: 89 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 fefcb1f..6832fa1 100644 --- a/kernel/sched/idle.c +++ b/kernel/sched/idle.c @@ -151,6 +151,7 @@ static void cpuidle_idle_call(void) /* 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. @@ -161,6 +162,7 @@ static void cpuidle_idle_call(void) /* 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 (entered_state == -EBUSY) goto use_default; diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h index 95c8ff7..897730f 100644 --- a/kernel/sched/sched.h +++ b/kernel/sched/sched.h @@ -701,6 +701,7 @@ struct rq { #ifdef CONFIG_CPU_IDLE /* Must be inspected within a rcu lock section */ struct cpuidle_state *idle_state; + int idle_state_idx; #endif }; @@ -1316,6 +1317,17 @@ 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) @@ -1326,6 +1338,15 @@ 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); -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/