From bbdba7c0e1161934ae881ad00e4db49830f5ef59 Mon Sep 17 00:00:00 2001 From: Ingo Molnar Date: Mon, 15 Oct 2007 17:00:06 +0200 Subject: sched: remove wait_runtime fields and features remove wait_runtime based fields and features, now that the CFS math has been changed over to the vruntime metric. Signed-off-by: Ingo Molnar Signed-off-by: Peter Zijlstra Signed-off-by: Mike Galbraith Reviewed-by: Thomas Gleixner --- kernel/sched_fair.c | 74 +++-------------------------------------------------- 1 file changed, 4 insertions(+), 70 deletions(-) (limited to 'kernel/sched_fair.c') diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c index a94189c..2df5a64 100644 --- a/kernel/sched_fair.c +++ b/kernel/sched_fair.c @@ -178,8 +178,6 @@ __enqueue_entity(struct cfs_rq *cfs_rq, struct sched_entity *se) update_load_add(&cfs_rq->load, se->load.weight); cfs_rq->nr_running++; se->on_rq = 1; - - schedstat_add(cfs_rq, wait_runtime, se->wait_runtime); } static void @@ -192,8 +190,6 @@ __dequeue_entity(struct cfs_rq *cfs_rq, struct sched_entity *se) update_load_sub(&cfs_rq->load, se->load.weight); cfs_rq->nr_running--; se->on_rq = 0; - - schedstat_add(cfs_rq, wait_runtime, -se->wait_runtime); } static inline struct rb_node *first_fair(struct cfs_rq *cfs_rq) @@ -249,13 +245,6 @@ static u64 sched_slice(struct cfs_rq *cfs_rq, struct sched_entity *se) return period; } -static void -add_wait_runtime(struct cfs_rq *cfs_rq, struct sched_entity *se, long delta) -{ - se->wait_runtime += delta; - schedstat_add(cfs_rq, wait_runtime, delta); -} - /* * Update the current task's runtime statistics. Skip current tasks that * are not in our scheduling class. @@ -264,9 +253,7 @@ static inline void __update_curr(struct cfs_rq *cfs_rq, struct sched_entity *curr, unsigned long delta_exec) { - unsigned long delta_fair, delta_mine, delta_exec_weighted; - struct load_weight *lw = &cfs_rq->load; - unsigned long load = lw->weight; + unsigned long delta_exec_weighted; schedstat_set(curr->exec_max, max((u64)delta_exec, curr->exec_max)); @@ -278,25 +265,6 @@ __update_curr(struct cfs_rq *cfs_rq, struct sched_entity *curr, &curr->load); } curr->vruntime += delta_exec_weighted; - - if (!sched_feat(FAIR_SLEEPERS)) - return; - - if (unlikely(!load)) - return; - - delta_fair = calc_delta_fair(delta_exec, lw); - delta_mine = calc_delta_mine(delta_exec, curr->load.weight, lw); - - cfs_rq->fair_clock += delta_fair; - /* - * We executed delta_exec amount of time on the CPU, - * but we were only entitled to delta_mine amount of - * time during that period (if nr_running == 1 then - * the two values are equal) - * [Note: delta_mine - delta_exec is negative]: - */ - add_wait_runtime(cfs_rq, curr, delta_mine - delta_exec); } static void update_curr(struct cfs_rq *cfs_rq) @@ -322,7 +290,6 @@ static void update_curr(struct cfs_rq *cfs_rq) static inline void update_stats_wait_start(struct cfs_rq *cfs_rq, struct sched_entity *se) { - se->wait_start_fair = cfs_rq->fair_clock; schedstat_set(se->wait_start, rq_of(cfs_rq)->clock); } @@ -354,35 +321,11 @@ static void update_stats_enqueue(struct cfs_rq *cfs_rq, struct sched_entity *se) se->fair_key = se->vruntime; } -/* - * Note: must be called with a freshly updated rq->fair_clock. - */ -static inline void -__update_stats_wait_end(struct cfs_rq *cfs_rq, struct sched_entity *se, - unsigned long delta_fair) -{ - schedstat_set(se->wait_max, max(se->wait_max, - rq_of(cfs_rq)->clock - se->wait_start)); - - delta_fair = calc_weighted(delta_fair, se); - - add_wait_runtime(cfs_rq, se, delta_fair); -} - static void update_stats_wait_end(struct cfs_rq *cfs_rq, struct sched_entity *se) { - unsigned long delta_fair; - - if (unlikely(!se->wait_start_fair)) - return; - - delta_fair = (unsigned long)min((u64)(2*sysctl_sched_runtime_limit), - (u64)(cfs_rq->fair_clock - se->wait_start_fair)); - - __update_stats_wait_end(cfs_rq, se, delta_fair); - - se->wait_start_fair = 0; + schedstat_set(se->wait_max, max(se->wait_max, + rq_of(cfs_rq)->clock - se->wait_start)); schedstat_set(se->wait_start, 0); } @@ -552,9 +495,7 @@ set_next_entity(struct cfs_rq *cfs_rq, struct sched_entity *se) /* * Any task has to be enqueued before it get to execute on * a CPU. So account for the time it spent waiting on the - * runqueue. (note, here we rely on pick_next_task() having - * done a put_prev_task_fair() shortly before this, which - * updated rq->fair_clock - used by update_stats_wait_end()) + * runqueue. */ update_stats_wait_end(cfs_rq, se); update_stats_curr_start(cfs_rq, se); @@ -989,13 +930,6 @@ static void task_new_fair(struct rq *rq, struct task_struct *p) update_curr(cfs_rq); place_entity(cfs_rq, se, 1); - /* - * The statistical average of wait_runtime is about - * -granularity/2, so initialize the task with that: - */ - if (sched_feat(START_DEBIT)) - se->wait_runtime = -(__sched_period(cfs_rq->nr_running+1) / 2); - if (sysctl_sched_child_runs_first && curr->vruntime < se->vruntime) { -- cgit v1.1