Lines Matching refs:env
2116 static void update_numa_stats(struct task_numa_env *env, in update_numa_stats() argument
2137 !cpumask_test_cpu(cpu, env->p->cpus_ptr)) in update_numa_stats()
2150 ns->node_type = numa_classify(env->imbalance_pct, ns); in update_numa_stats()
2156 static void task_numa_assign(struct task_numa_env *env, in task_numa_assign() argument
2159 struct rq *rq = cpu_rq(env->dst_cpu); in task_numa_assign()
2162 if (env->best_cpu != env->dst_cpu && xchg(&rq->numa_migrate_on, 1)) { in task_numa_assign()
2164 int start = env->dst_cpu; in task_numa_assign()
2167 for_each_cpu_wrap(cpu, cpumask_of_node(env->dst_nid), start + 1) { in task_numa_assign()
2168 if (cpu == env->best_cpu || !idle_cpu(cpu) || in task_numa_assign()
2169 !cpumask_test_cpu(cpu, env->p->cpus_ptr)) { in task_numa_assign()
2173 env->dst_cpu = cpu; in task_numa_assign()
2174 rq = cpu_rq(env->dst_cpu); in task_numa_assign()
2188 if (env->best_cpu != -1 && env->best_cpu != env->dst_cpu) { in task_numa_assign()
2189 rq = cpu_rq(env->best_cpu); in task_numa_assign()
2193 if (env->best_task) in task_numa_assign()
2194 put_task_struct(env->best_task); in task_numa_assign()
2198 env->best_task = p; in task_numa_assign()
2199 env->best_imp = imp; in task_numa_assign()
2200 env->best_cpu = env->dst_cpu; in task_numa_assign()
2204 struct task_numa_env *env) in load_too_imbalanced() argument
2217 src_capacity = env->src_stats.compute_capacity; in load_too_imbalanced()
2218 dst_capacity = env->dst_stats.compute_capacity; in load_too_imbalanced()
2222 orig_src_load = env->src_stats.load; in load_too_imbalanced()
2223 orig_dst_load = env->dst_stats.load; in load_too_imbalanced()
2244 static bool task_numa_compare(struct task_numa_env *env, in task_numa_compare() argument
2247 struct numa_group *cur_ng, *p_ng = deref_curr_numa_group(env->p); in task_numa_compare()
2248 struct rq *dst_rq = cpu_rq(env->dst_cpu); in task_numa_compare()
2252 int dist = env->dist; in task_numa_compare()
2269 if (cur == env->p) { in task_numa_compare()
2275 if (maymove && moveimp >= env->best_imp) in task_numa_compare()
2282 if (!cpumask_test_cpu(env->src_cpu, cur->cpus_ptr)) in task_numa_compare()
2289 if (env->best_task && in task_numa_compare()
2290 env->best_task->numa_preferred_nid == env->src_nid && in task_numa_compare()
2291 cur->numa_preferred_nid != env->src_nid) { in task_numa_compare()
2313 if (env->dst_stats.node_type == node_has_spare) in task_numa_compare()
2316 imp = taskimp + task_weight(cur, env->src_nid, dist) - in task_numa_compare()
2317 task_weight(cur, env->dst_nid, dist); in task_numa_compare()
2330 imp += group_weight(cur, env->src_nid, dist) - in task_numa_compare()
2331 group_weight(cur, env->dst_nid, dist); in task_numa_compare()
2333 imp += task_weight(cur, env->src_nid, dist) - in task_numa_compare()
2334 task_weight(cur, env->dst_nid, dist); in task_numa_compare()
2338 if (cur->numa_preferred_nid == env->dst_nid) in task_numa_compare()
2347 if (cur->numa_preferred_nid == env->src_nid) in task_numa_compare()
2350 if (maymove && moveimp > imp && moveimp > env->best_imp) { in task_numa_compare()
2360 if (env->best_task && cur->numa_preferred_nid == env->src_nid && in task_numa_compare()
2361 env->best_task->numa_preferred_nid != env->src_nid) { in task_numa_compare()
2371 if (imp < SMALLIMP || imp <= env->best_imp + SMALLIMP / 2) in task_numa_compare()
2377 load = task_h_load(env->p) - task_h_load(cur); in task_numa_compare()
2381 dst_load = env->dst_stats.load + load; in task_numa_compare()
2382 src_load = env->src_stats.load - load; in task_numa_compare()
2384 if (load_too_imbalanced(src_load, dst_load, env)) in task_numa_compare()
2390 int cpu = env->dst_stats.idle_cpu; in task_numa_compare()
2394 cpu = env->dst_cpu; in task_numa_compare()
2400 if (!idle_cpu(cpu) && env->best_cpu >= 0 && in task_numa_compare()
2401 idle_cpu(env->best_cpu)) { in task_numa_compare()
2402 cpu = env->best_cpu; in task_numa_compare()
2405 env->dst_cpu = cpu; in task_numa_compare()
2408 task_numa_assign(env, cur, imp); in task_numa_compare()
2415 if (maymove && !cur && env->best_cpu >= 0 && idle_cpu(env->best_cpu)) in task_numa_compare()
2422 if (!maymove && env->best_task && in task_numa_compare()
2423 env->best_task->numa_preferred_nid == env->src_nid) { in task_numa_compare()
2432 static void task_numa_find_cpu(struct task_numa_env *env, in task_numa_find_cpu() argument
2442 if (env->dst_stats.node_type == node_has_spare) { in task_numa_find_cpu()
2452 src_running = env->src_stats.nr_running - 1; in task_numa_find_cpu()
2453 dst_running = env->dst_stats.nr_running + 1; in task_numa_find_cpu()
2456 env->imb_numa_nr); in task_numa_find_cpu()
2461 if (env->dst_stats.idle_cpu >= 0) { in task_numa_find_cpu()
2462 env->dst_cpu = env->dst_stats.idle_cpu; in task_numa_find_cpu()
2463 task_numa_assign(env, NULL, 0); in task_numa_find_cpu()
2473 load = task_h_load(env->p); in task_numa_find_cpu()
2474 dst_load = env->dst_stats.load + load; in task_numa_find_cpu()
2475 src_load = env->src_stats.load - load; in task_numa_find_cpu()
2476 maymove = !load_too_imbalanced(src_load, dst_load, env); in task_numa_find_cpu()
2479 for_each_cpu(cpu, cpumask_of_node(env->dst_nid)) { in task_numa_find_cpu()
2481 if (!cpumask_test_cpu(cpu, env->p->cpus_ptr)) in task_numa_find_cpu()
2484 env->dst_cpu = cpu; in task_numa_find_cpu()
2485 if (task_numa_compare(env, taskimp, groupimp, maymove)) in task_numa_find_cpu()
2492 struct task_numa_env env = { in task_numa_migrate() local
2520 sd = rcu_dereference(per_cpu(sd_numa, env.src_cpu)); in task_numa_migrate()
2522 env.imbalance_pct = 100 + (sd->imbalance_pct - 100) / 2; in task_numa_migrate()
2523 env.imb_numa_nr = sd->imb_numa_nr; in task_numa_migrate()
2538 env.dst_nid = p->numa_preferred_nid; in task_numa_migrate()
2539 dist = env.dist = node_distance(env.src_nid, env.dst_nid); in task_numa_migrate()
2540 taskweight = task_weight(p, env.src_nid, dist); in task_numa_migrate()
2541 groupweight = group_weight(p, env.src_nid, dist); in task_numa_migrate()
2542 update_numa_stats(&env, &env.src_stats, env.src_nid, false); in task_numa_migrate()
2543 taskimp = task_weight(p, env.dst_nid, dist) - taskweight; in task_numa_migrate()
2544 groupimp = group_weight(p, env.dst_nid, dist) - groupweight; in task_numa_migrate()
2545 update_numa_stats(&env, &env.dst_stats, env.dst_nid, true); in task_numa_migrate()
2548 task_numa_find_cpu(&env, taskimp, groupimp); in task_numa_migrate()
2558 if (env.best_cpu == -1 || (ng && ng->active_nodes > 1)) { in task_numa_migrate()
2560 if (nid == env.src_nid || nid == p->numa_preferred_nid) in task_numa_migrate()
2563 dist = node_distance(env.src_nid, env.dst_nid); in task_numa_migrate()
2565 dist != env.dist) { in task_numa_migrate()
2566 taskweight = task_weight(p, env.src_nid, dist); in task_numa_migrate()
2567 groupweight = group_weight(p, env.src_nid, dist); in task_numa_migrate()
2576 env.dist = dist; in task_numa_migrate()
2577 env.dst_nid = nid; in task_numa_migrate()
2578 update_numa_stats(&env, &env.dst_stats, env.dst_nid, true); in task_numa_migrate()
2579 task_numa_find_cpu(&env, taskimp, groupimp); in task_numa_migrate()
2592 if (env.best_cpu == -1) in task_numa_migrate()
2593 nid = env.src_nid; in task_numa_migrate()
2595 nid = cpu_to_node(env.best_cpu); in task_numa_migrate()
2602 if (env.best_cpu == -1) { in task_numa_migrate()
2603 trace_sched_stick_numa(p, env.src_cpu, NULL, -1); in task_numa_migrate()
2607 best_rq = cpu_rq(env.best_cpu); in task_numa_migrate()
2608 if (env.best_task == NULL) { in task_numa_migrate()
2609 ret = migrate_task_to(p, env.best_cpu); in task_numa_migrate()
2612 trace_sched_stick_numa(p, env.src_cpu, NULL, env.best_cpu); in task_numa_migrate()
2616 ret = migrate_swap(p, env.best_task, env.best_cpu, env.src_cpu); in task_numa_migrate()
2620 trace_sched_stick_numa(p, env.src_cpu, env.best_task, env.best_cpu); in task_numa_migrate()
2621 put_task_struct(env.best_task); in task_numa_migrate()
9233 static int task_hot(struct task_struct *p, struct lb_env *env) in task_hot() argument
9237 lockdep_assert_rq_held(env->src_rq); in task_hot()
9246 if (env->sd->flags & SD_SHARE_CPUCAPACITY) in task_hot()
9252 if (sched_feat(CACHE_HOT_BUDDY) && env->dst_rq->nr_running && in task_hot()
9263 if (!sched_core_cookie_match(cpu_rq(env->dst_cpu), p)) in task_hot()
9269 delta = rq_clock_task(env->src_rq) - p->se.exec_start; in task_hot()
9280 static long migrate_degrades_locality(struct task_struct *p, struct lb_env *env) in migrate_degrades_locality() argument
9289 if (!p->numa_faults || !(env->sd->flags & SD_NUMA)) in migrate_degrades_locality()
9292 src_nid = cpu_to_node(env->src_cpu); in migrate_degrades_locality()
9293 dst_nid = cpu_to_node(env->dst_cpu); in migrate_degrades_locality()
9300 if (env->src_rq->nr_running > env->src_rq->nr_preferred_running) in migrate_degrades_locality()
9311 if (env->idle == CPU_IDLE) in migrate_degrades_locality()
9328 struct lb_env *env) in migrate_degrades_locality() argument
9362 int can_migrate_task(struct task_struct *p, struct lb_env *env) in can_migrate_task() argument
9366 lockdep_assert_rq_held(env->src_rq); in can_migrate_task()
9378 if ((p->se.sched_delayed) && (env->migration_type != migrate_load)) in can_migrate_task()
9381 if (throttled_lb_pair(task_group(p), env->src_cpu, env->dst_cpu)) in can_migrate_task()
9390 if (!env->sd->nr_balance_failed && in can_migrate_task()
9391 task_is_ineligible_on_dst_cpu(p, env->dst_cpu)) in can_migrate_task()
9398 if (!cpumask_test_cpu(env->dst_cpu, p->cpus_ptr)) { in can_migrate_task()
9403 env->flags |= LBF_SOME_PINNED; in can_migrate_task()
9415 if (env->idle == CPU_NEWLY_IDLE || in can_migrate_task()
9416 env->flags & (LBF_DST_PINNED | LBF_ACTIVE_LB)) in can_migrate_task()
9420 for_each_cpu_and(cpu, env->dst_grpmask, env->cpus) { in can_migrate_task()
9422 env->flags |= LBF_DST_PINNED; in can_migrate_task()
9423 env->new_dst_cpu = cpu; in can_migrate_task()
9432 env->flags &= ~LBF_ALL_PINNED; in can_migrate_task()
9434 if (task_on_cpu(env->src_rq, p)) { in can_migrate_task()
9446 if (env->flags & LBF_ACTIVE_LB) in can_migrate_task()
9449 degrades = migrate_degrades_locality(p, env); in can_migrate_task()
9451 hot = task_hot(p, env); in can_migrate_task()
9455 if (!hot || env->sd->nr_balance_failed > env->sd->cache_nice_tries) { in can_migrate_task()
9468 static void detach_task(struct task_struct *p, struct lb_env *env) in detach_task() argument
9470 lockdep_assert_rq_held(env->src_rq); in detach_task()
9474 schedstat_inc(env->sd->lb_hot_gained[env->idle]); in detach_task()
9478 deactivate_task(env->src_rq, p, DEQUEUE_NOCLOCK); in detach_task()
9479 set_task_cpu(p, env->dst_cpu); in detach_task()
9488 static struct task_struct *detach_one_task(struct lb_env *env) in detach_one_task() argument
9492 lockdep_assert_rq_held(env->src_rq); in detach_one_task()
9495 &env->src_rq->cfs_tasks, se.group_node) { in detach_one_task()
9496 if (!can_migrate_task(p, env)) in detach_one_task()
9499 detach_task(p, env); in detach_one_task()
9507 schedstat_inc(env->sd->lb_gained[env->idle]); in detach_one_task()
9519 static int detach_tasks(struct lb_env *env) in detach_tasks() argument
9521 struct list_head *tasks = &env->src_rq->cfs_tasks; in detach_tasks()
9526 lockdep_assert_rq_held(env->src_rq); in detach_tasks()
9532 if (env->src_rq->nr_running <= 1) { in detach_tasks()
9533 env->flags &= ~LBF_ALL_PINNED; in detach_tasks()
9537 if (env->imbalance <= 0) in detach_tasks()
9545 if (env->idle && env->src_rq->nr_running <= 1) in detach_tasks()
9548 env->loop++; in detach_tasks()
9550 if (env->loop > env->loop_max) in detach_tasks()
9554 if (env->loop > env->loop_break) { in detach_tasks()
9555 env->loop_break += SCHED_NR_MIGRATE_BREAK; in detach_tasks()
9556 env->flags |= LBF_NEED_BREAK; in detach_tasks()
9562 if (!can_migrate_task(p, env)) in detach_tasks()
9565 switch (env->migration_type) { in detach_tasks()
9577 load < 16 && !env->sd->nr_balance_failed) in detach_tasks()
9586 if (shr_bound(load, env->sd->nr_balance_failed) > env->imbalance) in detach_tasks()
9589 env->imbalance -= load; in detach_tasks()
9595 if (shr_bound(util, env->sd->nr_balance_failed) > env->imbalance) in detach_tasks()
9598 env->imbalance -= util; in detach_tasks()
9602 env->imbalance--; in detach_tasks()
9607 if (task_fits_cpu(p, env->src_cpu)) in detach_tasks()
9610 env->imbalance = 0; in detach_tasks()
9614 detach_task(p, env); in detach_tasks()
9615 list_add(&p->se.group_node, &env->tasks); in detach_tasks()
9625 if (env->idle == CPU_NEWLY_IDLE) in detach_tasks()
9633 if (env->imbalance <= 0) in detach_tasks()
9649 schedstat_add(env->sd->lb_gained[env->idle], detached); in detach_tasks()
9684 static void attach_tasks(struct lb_env *env) in attach_tasks() argument
9686 struct list_head *tasks = &env->tasks; in attach_tasks()
9690 rq_lock(env->dst_rq, &rf); in attach_tasks()
9691 update_rq_clock(env->dst_rq); in attach_tasks()
9697 attach_task(env->dst_rq, p); in attach_tasks()
9700 rq_unlock(env->dst_rq, &rf); in attach_tasks()
10230 sched_group_asym(struct lb_env *env, struct sg_lb_stats *sgs, struct sched_group *group) in sched_group_asym() argument
10240 return sched_asym(env->sd, env->dst_cpu, group->asym_prefer_cpu); in sched_group_asym()
10254 static inline bool smt_balance(struct lb_env *env, struct sg_lb_stats *sgs, in smt_balance() argument
10257 if (!env->idle) in smt_balance()
10273 static inline long sibling_imbalance(struct lb_env *env, in sibling_imbalance() argument
10281 if (!env->idle || !busiest->sum_nr_running) in sibling_imbalance()
10330 static inline void update_sg_lb_stats(struct lb_env *env, in update_sg_lb_stats() argument
10337 int i, nr_running, local_group, sd_flags = env->sd->flags; in update_sg_lb_stats()
10338 bool balancing_at_rd = !env->sd->parent; in update_sg_lb_stats()
10344 for_each_cpu_and(i, sched_group_span(group), env->cpus) { in update_sg_lb_stats()
10388 } else if (env->idle && sched_reduced_capacity(rq, env->sd)) { in update_sg_lb_stats()
10400 if (!local_group && env->idle && sgs->sum_h_nr_running && in update_sg_lb_stats()
10401 sched_group_asym(env, sgs, group)) in update_sg_lb_stats()
10405 if (!local_group && smt_balance(env, sgs, group)) in update_sg_lb_stats()
10408 sgs->group_type = group_classify(env->sd->imbalance_pct, group, sgs); in update_sg_lb_stats()
10429 static bool update_sd_pick_busiest(struct lb_env *env, in update_sd_pick_busiest() argument
10446 if ((env->sd->flags & SD_ASYM_CPUCAPACITY) && in update_sd_pick_busiest()
10448 (!capacity_greater(capacity_of(env->dst_cpu), sg->sgc->max_capacity) || in update_sd_pick_busiest()
10559 if ((env->sd->flags & SD_ASYM_CPUCAPACITY) && in update_sd_pick_busiest()
10561 (capacity_greater(sg->sgc->min_capacity, capacity_of(env->dst_cpu)))) in update_sd_pick_busiest()
10929 static void update_idle_cpu_scan(struct lb_env *env, in update_idle_cpu_scan() argument
10943 if (!sched_feat(SIS_UTIL) || env->idle == CPU_NEWLY_IDLE) in update_idle_cpu_scan()
10946 llc_weight = per_cpu(sd_llc_size, env->dst_cpu); in update_idle_cpu_scan()
10947 if (env->sd->span_weight != llc_weight) in update_idle_cpu_scan()
10950 sd_share = rcu_dereference(per_cpu(sd_llc_shared, env->dst_cpu)); in update_idle_cpu_scan()
10987 pct = env->sd->imbalance_pct; in update_idle_cpu_scan()
11006 static inline void update_sd_lb_stats(struct lb_env *env, struct sd_lb_stats *sds) in update_sd_lb_stats() argument
11008 struct sched_group *sg = env->sd->groups; in update_sd_lb_stats()
11018 local_group = cpumask_test_cpu(env->dst_cpu, sched_group_span(sg)); in update_sd_lb_stats()
11023 if (env->idle != CPU_NEWLY_IDLE || in update_sd_lb_stats()
11025 update_group_capacity(env->sd, env->dst_cpu); in update_sd_lb_stats()
11028 update_sg_lb_stats(env, sds, sg, sgs, &sg_overloaded, &sg_overutilized); in update_sd_lb_stats()
11030 if (!local_group && update_sd_pick_busiest(env, sds, sg, sgs)) { in update_sd_lb_stats()
11041 } while (sg != env->sd->groups); in update_sd_lb_stats()
11052 if (env->sd->flags & SD_NUMA) in update_sd_lb_stats()
11053 env->fbq_type = fbq_classify_group(&sds->busiest_stat); in update_sd_lb_stats()
11055 if (!env->sd->parent) { in update_sd_lb_stats()
11057 set_rd_overloaded(env->dst_rq->rd, sg_overloaded); in update_sd_lb_stats()
11060 set_rd_overutilized(env->dst_rq->rd, sg_overutilized); in update_sd_lb_stats()
11062 set_rd_overutilized(env->dst_rq->rd, sg_overutilized); in update_sd_lb_stats()
11065 update_idle_cpu_scan(env, sum_util); in update_sd_lb_stats()
11074 static inline void calculate_imbalance(struct lb_env *env, struct sd_lb_stats *sds) in calculate_imbalance() argument
11082 if (env->sd->flags & SD_ASYM_CPUCAPACITY) { in calculate_imbalance()
11084 env->migration_type = migrate_misfit; in calculate_imbalance()
11085 env->imbalance = 1; in calculate_imbalance()
11091 env->migration_type = migrate_load; in calculate_imbalance()
11092 env->imbalance = busiest->group_misfit_task_load; in calculate_imbalance()
11102 env->migration_type = migrate_task; in calculate_imbalance()
11103 env->imbalance = busiest->sum_h_nr_running; in calculate_imbalance()
11109 env->migration_type = migrate_task; in calculate_imbalance()
11110 env->imbalance = 1; in calculate_imbalance()
11121 env->migration_type = migrate_task; in calculate_imbalance()
11122 env->imbalance = 1; in calculate_imbalance()
11132 !(env->sd->flags & SD_SHARE_LLC)) { in calculate_imbalance()
11141 env->migration_type = migrate_util; in calculate_imbalance()
11142 env->imbalance = max(local->group_capacity, local->group_util) - in calculate_imbalance()
11152 if (env->idle && env->imbalance == 0) { in calculate_imbalance()
11153 env->migration_type = migrate_task; in calculate_imbalance()
11154 env->imbalance = 1; in calculate_imbalance()
11165 env->migration_type = migrate_task; in calculate_imbalance()
11166 env->imbalance = sibling_imbalance(env, sds, busiest, local); in calculate_imbalance()
11173 env->migration_type = migrate_task; in calculate_imbalance()
11174 env->imbalance = max_t(long, 0, in calculate_imbalance()
11180 if (env->sd->flags & SD_NUMA) { in calculate_imbalance()
11181 env->imbalance = adjust_numa_imbalance(env->imbalance, in calculate_imbalance()
11183 env->sd->imb_numa_nr); in calculate_imbalance()
11188 env->imbalance >>= 1; in calculate_imbalance()
11211 env->imbalance = 0; in calculate_imbalance()
11223 env->imbalance = 0; in calculate_imbalance()
11237 env->migration_type = migrate_load; in calculate_imbalance()
11238 env->imbalance = min( in calculate_imbalance()
11276 static struct sched_group *sched_balance_find_src_group(struct lb_env *env) in sched_balance_find_src_group() argument
11287 update_sd_lb_stats(env, &sds); in sched_balance_find_src_group()
11299 if (!is_rd_overutilized(env->dst_rq->rd) && in sched_balance_find_src_group()
11300 rcu_dereference(env->dst_rq->rd->pd)) in sched_balance_find_src_group()
11351 env->sd->imbalance_pct * local->avg_load) in sched_balance_find_src_group()
11360 sibling_imbalance(env, &sds, busiest, local) > 1) in sched_balance_find_src_group()
11364 if (!env->idle) { in sched_balance_find_src_group()
11403 calculate_imbalance(env, &sds); in sched_balance_find_src_group()
11404 return env->imbalance ? sds.busiest : NULL; in sched_balance_find_src_group()
11407 env->imbalance = 0; in sched_balance_find_src_group()
11414 static struct rq *sched_balance_find_src_rq(struct lb_env *env, in sched_balance_find_src_rq() argument
11422 for_each_cpu_and(i, sched_group_span(group), env->cpus) { in sched_balance_find_src_rq()
11449 if (rt > env->fbq_type) in sched_balance_find_src_rq()
11464 if (env->sd->flags & SD_ASYM_CPUCAPACITY && in sched_balance_find_src_rq()
11465 !capacity_greater(capacity_of(env->dst_cpu), capacity) && in sched_balance_find_src_rq()
11476 if (sched_asym(env->sd, i, env->dst_cpu) && nr_running == 1) in sched_balance_find_src_rq()
11479 switch (env->migration_type) { in sched_balance_find_src_rq()
11487 if (nr_running == 1 && load > env->imbalance && in sched_balance_find_src_rq()
11488 !check_cpu_capacity(rq, env->sd)) in sched_balance_find_src_rq()
11560 asym_active_balance(struct lb_env *env) in asym_active_balance() argument
11572 return env->idle && sched_use_asym_prio(env->sd, env->dst_cpu) && in asym_active_balance()
11573 (sched_asym_prefer(env->dst_cpu, env->src_cpu) || in asym_active_balance()
11574 !sched_use_asym_prio(env->sd, env->src_cpu)); in asym_active_balance()
11578 imbalanced_active_balance(struct lb_env *env) in imbalanced_active_balance() argument
11580 struct sched_domain *sd = env->sd; in imbalanced_active_balance()
11587 if ((env->migration_type == migrate_task) && in imbalanced_active_balance()
11594 static int need_active_balance(struct lb_env *env) in need_active_balance() argument
11596 struct sched_domain *sd = env->sd; in need_active_balance()
11598 if (asym_active_balance(env)) in need_active_balance()
11601 if (imbalanced_active_balance(env)) in need_active_balance()
11610 if (env->idle && in need_active_balance()
11611 (env->src_rq->cfs.h_nr_runnable == 1)) { in need_active_balance()
11612 if ((check_cpu_capacity(env->src_rq, sd)) && in need_active_balance()
11613 (capacity_of(env->src_cpu)*sd->imbalance_pct < capacity_of(env->dst_cpu)*100)) in need_active_balance()
11617 if (env->migration_type == migrate_misfit) in need_active_balance()
11625 static int should_we_balance(struct lb_env *env) in should_we_balance() argument
11628 struct sched_group *sg = env->sd->groups; in should_we_balance()
11635 if (!cpumask_test_cpu(env->dst_cpu, env->cpus)) in should_we_balance()
11645 if (env->idle == CPU_NEWLY_IDLE) { in should_we_balance()
11646 if (env->dst_rq->nr_running > 0 || env->dst_rq->ttwu_pending) in should_we_balance()
11653 for_each_cpu_and(cpu, swb_cpus, env->cpus) { in should_we_balance()
11662 if (!(env->sd->flags & SD_SHARE_CPUCAPACITY) && !is_core_idle(cpu)) { in should_we_balance()
11680 return cpu == env->dst_cpu; in should_we_balance()
11685 return idle_smt == env->dst_cpu; in should_we_balance()
11688 return group_balance_cpu(sg) == env->dst_cpu; in should_we_balance()
11691 static void update_lb_imbalance_stat(struct lb_env *env, struct sched_domain *sd, in update_lb_imbalance_stat() argument
11697 switch (env->migration_type) { in update_lb_imbalance_stat()
11699 __schedstat_add(sd->lb_imbalance_load[idle], env->imbalance); in update_lb_imbalance_stat()
11702 __schedstat_add(sd->lb_imbalance_util[idle], env->imbalance); in update_lb_imbalance_stat()
11705 __schedstat_add(sd->lb_imbalance_task[idle], env->imbalance); in update_lb_imbalance_stat()
11708 __schedstat_add(sd->lb_imbalance_misfit[idle], env->imbalance); in update_lb_imbalance_stat()
11727 struct lb_env env = { in sched_balance_rq() local
11736 .tasks = LIST_HEAD_INIT(env.tasks), in sched_balance_rq()
11744 if (!should_we_balance(&env)) { in sched_balance_rq()
11749 group = sched_balance_find_src_group(&env); in sched_balance_rq()
11755 busiest = sched_balance_find_src_rq(&env, group); in sched_balance_rq()
11761 WARN_ON_ONCE(busiest == env.dst_rq); in sched_balance_rq()
11763 update_lb_imbalance_stat(&env, sd, idle); in sched_balance_rq()
11765 env.src_cpu = busiest->cpu; in sched_balance_rq()
11766 env.src_rq = busiest; in sched_balance_rq()
11770 env.flags |= LBF_ALL_PINNED; in sched_balance_rq()
11778 env.loop_max = min(sysctl_sched_nr_migrate, busiest->nr_running); in sched_balance_rq()
11788 cur_ld_moved = detach_tasks(&env); in sched_balance_rq()
11801 attach_tasks(&env); in sched_balance_rq()
11807 if (env.flags & LBF_NEED_BREAK) { in sched_balance_rq()
11808 env.flags &= ~LBF_NEED_BREAK; in sched_balance_rq()
11831 if ((env.flags & LBF_DST_PINNED) && env.imbalance > 0) { in sched_balance_rq()
11834 __cpumask_clear_cpu(env.dst_cpu, env.cpus); in sched_balance_rq()
11836 env.dst_rq = cpu_rq(env.new_dst_cpu); in sched_balance_rq()
11837 env.dst_cpu = env.new_dst_cpu; in sched_balance_rq()
11838 env.flags &= ~LBF_DST_PINNED; in sched_balance_rq()
11839 env.loop = 0; in sched_balance_rq()
11840 env.loop_break = SCHED_NR_MIGRATE_BREAK; in sched_balance_rq()
11855 if ((env.flags & LBF_SOME_PINNED) && env.imbalance > 0) in sched_balance_rq()
11860 if (unlikely(env.flags & LBF_ALL_PINNED)) { in sched_balance_rq()
11870 if (!cpumask_subset(cpus, env.dst_grpmask)) { in sched_balance_rq()
11871 env.loop = 0; in sched_balance_rq()
11872 env.loop_break = SCHED_NR_MIGRATE_BREAK; in sched_balance_rq()
11891 env.migration_type != migrate_misfit) in sched_balance_rq()
11894 if (need_active_balance(&env)) { in sched_balance_rq()
11910 env.flags &= ~LBF_ALL_PINNED; in sched_balance_rq()
11936 if (likely(!active_balance) || need_active_balance(&env)) { in sched_balance_rq()
11949 if (sd_parent && !(env.flags & LBF_ALL_PINNED)) { in sched_balance_rq()
11979 if (env.idle == CPU_NEWLY_IDLE || in sched_balance_rq()
11980 env.migration_type == migrate_misfit) in sched_balance_rq()
11984 if ((env.flags & LBF_ALL_PINNED && in sched_balance_rq()
12078 struct lb_env env = { in active_load_balance_cpu_stop() local
12091 p = detach_one_task(&env); in active_load_balance_cpu_stop()