diff options
Diffstat (limited to 'kernel/sched')
| -rw-r--r-- | kernel/sched/core.c | 6 | ||||
| -rw-r--r-- | kernel/sched/fair.c | 42 | ||||
| -rw-r--r-- | kernel/sched/loadavg.c | 8 | ||||
| -rw-r--r-- | kernel/sched/sched.h | 2 |
4 files changed, 29 insertions, 29 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 51d7105f529a..97ee9ac7e97c 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -5394,13 +5394,15 @@ void idle_task_exit(void) /* * Since this CPU is going 'away' for a while, fold any nr_active delta * we might have. Assumes we're called after migrate_tasks() so that the - * nr_active count is stable. + * nr_active count is stable. We need to take the teardown thread which + * is calling this into account, so we hand in adjust = 1 to the load + * calculation. * * Also see the comment "Global load-average calculations". */ static void calc_load_migrate(struct rq *rq) { - long delta = calc_load_fold_active(rq); + long delta = calc_load_fold_active(rq, 1); if (delta) atomic_long_add(delta, &calc_load_tasks); } diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index bdcbeea90c95..c8c5d2d48424 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -735,8 +735,6 @@ void post_init_entity_util_avg(struct sched_entity *se) } } -static inline unsigned long cfs_rq_runnable_load_avg(struct cfs_rq *cfs_rq); -static inline unsigned long cfs_rq_load_avg(struct cfs_rq *cfs_rq); #else void init_entity_runnable_average(struct sched_entity *se) { @@ -2499,28 +2497,22 @@ account_entity_dequeue(struct cfs_rq *cfs_rq, struct sched_entity *se) #ifdef CONFIG_FAIR_GROUP_SCHED # ifdef CONFIG_SMP -static inline long calc_tg_weight(struct task_group *tg, struct cfs_rq *cfs_rq) +static long calc_cfs_shares(struct cfs_rq *cfs_rq, struct task_group *tg) { - long tg_weight; + long tg_weight, load, shares; /* - * Use this CPU's real-time load instead of the last load contribution - * as the updating of the contribution is delayed, and we will use the - * the real-time load to calc the share. See update_tg_load_avg(). + * This really should be: cfs_rq->avg.load_avg, but instead we use + * cfs_rq->load.weight, which is its upper bound. This helps ramp up + * the shares for small weight interactive tasks. */ - tg_weight = atomic_long_read(&tg->load_avg); - tg_weight -= cfs_rq->tg_load_avg_contrib; - tg_weight += cfs_rq->load.weight; + load = scale_load_down(cfs_rq->load.weight); - return tg_weight; -} - -static long calc_cfs_shares(struct cfs_rq *cfs_rq, struct task_group *tg) -{ - long tg_weight, load, shares; + tg_weight = atomic_long_read(&tg->load_avg); - tg_weight = calc_tg_weight(tg, cfs_rq); - load = cfs_rq->load.weight; + /* Ensure tg_weight >= load */ + tg_weight -= cfs_rq->tg_load_avg_contrib; + tg_weight += load; shares = (tg->shares * load); if (tg_weight) @@ -2539,6 +2531,7 @@ static inline long calc_cfs_shares(struct cfs_rq *cfs_rq, struct task_group *tg) return tg->shares; } # endif /* CONFIG_SMP */ + static void reweight_entity(struct cfs_rq *cfs_rq, struct sched_entity *se, unsigned long weight) { @@ -4946,19 +4939,24 @@ static long effective_load(struct task_group *tg, int cpu, long wl, long wg) return wl; for_each_sched_entity(se) { - long w, W; + struct cfs_rq *cfs_rq = se->my_q; + long W, w = cfs_rq_load_avg(cfs_rq); - tg = se->my_q->tg; + tg = cfs_rq->tg; /* * W = @wg + \Sum rw_j */ - W = wg + calc_tg_weight(tg, se->my_q); + W = wg + atomic_long_read(&tg->load_avg); + + /* Ensure \Sum rw_j >= rw_i */ + W -= cfs_rq->tg_load_avg_contrib; + W += w; /* * w = rw_i + @wl */ - w = cfs_rq_load_avg(se->my_q) + wl; + w += wl; /* * wl = S * s'_i; see (2) diff --git a/kernel/sched/loadavg.c b/kernel/sched/loadavg.c index b0b93fd33af9..a2d6eb71f06b 100644 --- a/kernel/sched/loadavg.c +++ b/kernel/sched/loadavg.c @@ -78,11 +78,11 @@ void get_avenrun(unsigned long *loads, unsigned long offset, int shift) loads[2] = (avenrun[2] + offset) << shift; } -long calc_load_fold_active(struct rq *this_rq) +long calc_load_fold_active(struct rq *this_rq, long adjust) { long nr_active, delta = 0; - nr_active = this_rq->nr_running; + nr_active = this_rq->nr_running - adjust; nr_active += (long)this_rq->nr_uninterruptible; if (nr_active != this_rq->calc_load_active) { @@ -188,7 +188,7 @@ void calc_load_enter_idle(void) * We're going into NOHZ mode, if there's any pending delta, fold it * into the pending idle delta. */ - delta = calc_load_fold_active(this_rq); + delta = calc_load_fold_active(this_rq, 0); if (delta) { int idx = calc_load_write_idx(); @@ -389,7 +389,7 @@ void calc_global_load_tick(struct rq *this_rq) if (time_before(jiffies, this_rq->calc_load_update)) return; - delta = calc_load_fold_active(this_rq); + delta = calc_load_fold_active(this_rq, 0); if (delta) atomic_long_add(delta, &calc_load_tasks); diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h index 7cbeb92a1cb9..898c0d2f18fe 100644 --- a/kernel/sched/sched.h +++ b/kernel/sched/sched.h @@ -28,7 +28,7 @@ extern unsigned long calc_load_update; extern atomic_long_t calc_load_tasks; extern void calc_global_load_tick(struct rq *this_rq); -extern long calc_load_fold_active(struct rq *this_rq); +extern long calc_load_fold_active(struct rq *this_rq, long adjust); #ifdef CONFIG_SMP extern void cpu_load_update_active(struct rq *this_rq); |