Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751813AbaGBKeI (ORCPT ); Wed, 2 Jul 2014 06:34:08 -0400 Received: from mga09.intel.com ([134.134.136.24]:62413 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750969AbaGBKeG (ORCPT ); Wed, 2 Jul 2014 06:34:06 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.01,587,1400050800"; d="scan'208";a="567182167" From: Yuyang Du To: mingo@redhat.com, peterz@infradead.org, linux-kernel@vger.kernel.org, rafael.j.wysocki@intel.com Cc: arjan.van.de.ven@intel.com, len.brown@intel.com, alan.cox@intel.com, mark.gross@intel.com, pjt@google.com, fengguang.wu@intel.com, yuyang.du@intel.com Subject: [PATCH 1/2] sched: Remove update_rq_runnable_avg Date: Wed, 2 Jul 2014 10:30:55 +0800 Message-Id: <1404268256-3019-1-git-send-email-yuyang.du@intel.com> X-Mailer: git-send-email 1.7.9.5 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The current rq->avg is not made use of anywhere, and the code is in fair scheduler's critical path, so remove it. Signed-off-by: Yuyang Du --- kernel/sched/debug.c | 8 -------- kernel/sched/fair.c | 24 ++++-------------------- kernel/sched/sched.h | 2 -- 3 files changed, 4 insertions(+), 30 deletions(-) diff --git a/kernel/sched/debug.c b/kernel/sched/debug.c index 695f977..4b864c7 100644 --- a/kernel/sched/debug.c +++ b/kernel/sched/debug.c @@ -68,14 +68,6 @@ static void print_cfs_group_stats(struct seq_file *m, int cpu, struct task_group #define PN(F) \ SEQ_printf(m, " .%-30s: %lld.%06ld\n", #F, SPLIT_NS((long long)F)) - if (!se) { - struct sched_avg *avg = &cpu_rq(cpu)->avg; - P(avg->runnable_avg_sum); - P(avg->runnable_avg_period); - return; - } - - PN(se->exec_start); PN(se->vruntime); PN(se->sum_exec_runtime); diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index fea7d33..1a2d04f 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -2430,18 +2430,12 @@ static inline void __update_group_entity_contrib(struct sched_entity *se) } } -static inline void update_rq_runnable_avg(struct rq *rq, int runnable) -{ - __update_entity_runnable_avg(rq_clock_task(rq), &rq->avg, runnable); - __update_tg_runnable_avg(&rq->avg, &rq->cfs); -} #else /* CONFIG_FAIR_GROUP_SCHED */ static inline void __update_cfs_rq_tg_load_contrib(struct cfs_rq *cfs_rq, int force_update) {} static inline void __update_tg_runnable_avg(struct sched_avg *sa, struct cfs_rq *cfs_rq) {} static inline void __update_group_entity_contrib(struct sched_entity *se) {} -static inline void update_rq_runnable_avg(struct rq *rq, int runnable) {} #endif /* CONFIG_FAIR_GROUP_SCHED */ static inline void __update_task_entity_contrib(struct sched_entity *se) @@ -2614,7 +2608,6 @@ static inline void dequeue_entity_load_avg(struct cfs_rq *cfs_rq, */ void idle_enter_fair(struct rq *this_rq) { - update_rq_runnable_avg(this_rq, 1); } /* @@ -2624,7 +2617,6 @@ void idle_enter_fair(struct rq *this_rq) */ void idle_exit_fair(struct rq *this_rq) { - update_rq_runnable_avg(this_rq, 0); } static int idle_balance(struct rq *this_rq); @@ -2633,7 +2625,6 @@ static int idle_balance(struct rq *this_rq); static inline void update_entity_load_avg(struct sched_entity *se, int update_cfs_rq) {} -static inline void update_rq_runnable_avg(struct rq *rq, int runnable) {} static inline void enqueue_entity_load_avg(struct cfs_rq *cfs_rq, struct sched_entity *se, int wakeup) {} @@ -3936,10 +3927,9 @@ enqueue_task_fair(struct rq *rq, struct task_struct *p, int flags) update_entity_load_avg(se, 1); } - if (!se) { - update_rq_runnable_avg(rq, rq->nr_running); + if (!se) add_nr_running(rq, 1); - } + hrtick_update(rq); } @@ -3997,10 +3987,9 @@ static void dequeue_task_fair(struct rq *rq, struct task_struct *p, int flags) update_entity_load_avg(se, 1); } - if (!se) { + if (!se) sub_nr_running(rq, 1); - update_rq_runnable_avg(rq, 1); - } + hrtick_update(rq); } @@ -5437,9 +5426,6 @@ static void __update_blocked_averages_cpu(struct task_group *tg, int cpu) */ if (!se->avg.runnable_avg_sum && !cfs_rq->nr_running) list_del_leaf_cfs_rq(cfs_rq); - } else { - struct rq *rq = rq_of(cfs_rq); - update_rq_runnable_avg(rq, rq->nr_running); } } @@ -7352,8 +7338,6 @@ static void task_tick_fair(struct rq *rq, struct task_struct *curr, int queued) if (numabalancing_enabled) task_tick_numa(rq, curr); - - update_rq_runnable_avg(rq, 1); } /* diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h index 31cc02e..a147571 100644 --- a/kernel/sched/sched.h +++ b/kernel/sched/sched.h @@ -542,8 +542,6 @@ struct rq { #ifdef CONFIG_FAIR_GROUP_SCHED /* list of leaf cfs_rq on this cpu: */ struct list_head leaf_cfs_rq_list; - - struct sched_avg avg; #endif /* CONFIG_FAIR_GROUP_SCHED */ /* -- 1.7.9.5 -- 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/