*
* Scaled math optimizations by Thomas Gleixner
* Copyright (C) 2007, Thomas Gleixner <tglx@linutronix.de>
+ *
+ * Adaptive scheduling granularity, math enhancements by Peter Zijlstra
+ * Copyright (C) 2007 Red Hat, Inc., Peter Zijlstra <pzijlstr@redhat.com>
*/
/*
- * Preemption granularity:
- * (default: 2 msec, units: nanoseconds)
+ * Targeted preemption latency for CPU-bound tasks:
+ * (default: 20ms, units: nanoseconds)
*
- * NOTE: this granularity value is not the same as the concept of
- * 'timeslice length' - timeslices in CFS will typically be somewhat
- * larger than this value. (to see the precise effective timeslice
- * length of your workload, run vmstat and monitor the context-switches
- * field)
+ * NOTE: this latency value is not the same as the concept of
+ * 'timeslice length' - timeslices in CFS are of variable length.
+ * (to see the precise effective timeslice length of your workload,
+ * run vmstat and monitor the context-switches field)
*
* On SMP systems the value of this is multiplied by the log2 of the
* number of CPUs. (i.e. factor 2x on 2-way systems, 3x on 4-way
* systems, 4x on 8-way systems, 5x on 16-way systems, etc.)
+ * Targeted preemption latency for CPU-bound tasks:
*/
-unsigned int sysctl_sched_granularity __read_mostly = 2000000000ULL/HZ;
+unsigned int sysctl_sched_latency __read_mostly = 20000000ULL;
+
+/*
+ * Minimal preemption granularity for CPU-bound tasks:
+ * (default: 2 msec, units: nanoseconds)
+ */
+unsigned int sysctl_sched_min_granularity __read_mostly = 2000000ULL;
/*
* SCHED_BATCH wake-up granularity.
- * (default: 10 msec, units: nanoseconds)
+ * (default: 25 msec, units: nanoseconds)
*
* This option delays the preemption effects of decoupled workloads
* and reduces their over-scheduling. Synchronous workloads will still
* have immediate wakeup/sleep latencies.
*/
-unsigned int sysctl_sched_batch_wakeup_granularity __read_mostly =
- 10000000000ULL/HZ;
+unsigned int sysctl_sched_batch_wakeup_granularity __read_mostly = 25000000UL;
/*
* SCHED_OTHER wake-up granularity.
* and reduces their over-scheduling. Synchronous workloads will still
* have immediate wakeup/sleep latencies.
*/
-unsigned int sysctl_sched_wakeup_granularity __read_mostly = 1000000000ULL/HZ;
+unsigned int sysctl_sched_wakeup_granularity __read_mostly = 1000000UL;
unsigned int sysctl_sched_stat_granularity __read_mostly;
/*
- * Initialized in sched_init_granularity():
+ * Initialized in sched_init_granularity() [to 5 times the base granularity]:
*/
unsigned int sysctl_sched_runtime_limit __read_mostly;
unsigned int sysctl_sched_features __read_mostly =
SCHED_FEAT_FAIR_SLEEPERS *1 |
- SCHED_FEAT_SLEEPER_AVG *1 |
+ SCHED_FEAT_SLEEPER_AVG *0 |
SCHED_FEAT_SLEEPER_LOAD_AVG *1 |
SCHED_FEAT_PRECISE_CPU_LOAD *1 |
SCHED_FEAT_START_DEBIT *1 |
* Scheduling class statistics methods:
*/
+/*
+ * Calculate the preemption granularity needed to schedule every
+ * runnable task once per sysctl_sched_latency amount of time.
+ * (down to a sensible low limit on granularity)
+ *
+ * For example, if there are 2 tasks running and latency is 10 msecs,
+ * we switch tasks every 5 msecs. If we have 3 tasks running, we have
+ * to switch tasks every 3.33 msecs to get a 10 msecs observed latency
+ * for each task. We do finer and finer scheduling up to until we
+ * reach the minimum granularity value.
+ *
+ * To achieve this we use the following dynamic-granularity rule:
+ *
+ * gran = lat/nr - lat/nr/nr
+ *
+ * This comes out of the following equations:
+ *
+ * kA1 + gran = kB1
+ * kB2 + gran = kA2
+ * kA2 = kA1
+ * kB2 = kB1 - d + d/nr
+ * lat = d * nr
+ *
+ * Where 'k' is key, 'A' is task A (waiting), 'B' is task B (running),
+ * '1' is start of time, '2' is end of time, 'd' is delay between
+ * 1 and 2 (during which task B was running), 'nr' is number of tasks
+ * running, 'lat' is the the period of each task. ('lat' is the
+ * sched_latency that we aim for.)
+ */
+static long
+sched_granularity(struct cfs_rq *cfs_rq)
+{
+ unsigned int gran = sysctl_sched_latency;
+ unsigned int nr = cfs_rq->nr_running;
+
+ if (nr > 1) {
+ gran = gran/nr - gran/nr/nr;
+ gran = max(gran, sysctl_sched_min_granularity);
+ }
+
+ return gran;
+}
+
/*
* We rescale the rescheduling granularity of tasks according to their
* nice level, but only linearly, not exponentially:
{
u64 tmp;
+ if (likely(curr->load.weight == NICE_0_LOAD))
+ return granularity;
/*
- * Negative nice levels get the same granularity as nice-0:
+ * Positive nice levels get the same granularity as nice-0:
*/
- if (likely(curr->load.weight >= NICE_0_LOAD))
- return granularity;
+ if (likely(curr->load.weight < NICE_0_LOAD)) {
+ tmp = curr->load.weight * (u64)granularity;
+ return (long) (tmp >> NICE_0_SHIFT);
+ }
/*
- * Positive nice level tasks get linearly finer
+ * Negative nice level tasks get linearly finer
* granularity:
*/
- tmp = curr->load.weight * (u64)granularity;
+ tmp = curr->load.inv_weight * (u64)granularity;
/*
* It will always fit into 'long':
*/
- return (long) (tmp >> NICE_0_SHIFT);
+ return (long) (tmp >> WMULT_SHIFT);
}
static inline void
* are not in our scheduling class.
*/
static inline void
-__update_curr(struct cfs_rq *cfs_rq, struct sched_entity *curr, u64 now)
+__update_curr(struct cfs_rq *cfs_rq, struct sched_entity *curr)
{
- unsigned long delta, delta_exec, delta_fair;
- long delta_mine;
+ unsigned long delta, delta_exec, delta_fair, delta_mine;
struct load_weight *lw = &cfs_rq->load;
unsigned long load = lw->weight;
- if (unlikely(!load))
- return;
-
delta_exec = curr->delta_exec;
-#ifdef CONFIG_SCHEDSTATS
- if (unlikely(delta_exec > curr->exec_max))
- curr->exec_max = delta_exec;
-#endif
+ schedstat_set(curr->exec_max, max((u64)delta_exec, curr->exec_max));
curr->sum_exec_runtime += delta_exec;
cfs_rq->exec_clock += delta_exec;
+ if (unlikely(!load))
+ return;
+
delta_fair = calc_delta_fair(delta_exec, lw);
delta_mine = calc_delta_mine(delta_exec, curr->load.weight, lw);
- if (cfs_rq->sleeper_bonus > sysctl_sched_stat_granularity) {
- delta = calc_delta_mine(cfs_rq->sleeper_bonus,
- curr->load.weight, lw);
- if (unlikely(delta > cfs_rq->sleeper_bonus))
- delta = cfs_rq->sleeper_bonus;
-
+ if (cfs_rq->sleeper_bonus > sysctl_sched_min_granularity) {
+ delta = min((u64)delta_mine, cfs_rq->sleeper_bonus);
+ delta = min(delta, (unsigned long)(
+ (long)sysctl_sched_runtime_limit - curr->wait_runtime));
cfs_rq->sleeper_bonus -= delta;
delta_mine -= delta;
}
add_wait_runtime(cfs_rq, curr, delta_mine - delta_exec);
}
-static void update_curr(struct cfs_rq *cfs_rq, u64 now)
+static void update_curr(struct cfs_rq *cfs_rq)
{
struct sched_entity *curr = cfs_rq_curr(cfs_rq);
unsigned long delta_exec;
* since the last time we changed load (this cannot
* overflow on 32 bits):
*/
- delta_exec = (unsigned long)(now - curr->exec_start);
+ delta_exec = (unsigned long)(rq_of(cfs_rq)->clock - curr->exec_start);
curr->delta_exec += delta_exec;
if (unlikely(curr->delta_exec > sysctl_sched_stat_granularity)) {
- __update_curr(cfs_rq, curr, now);
+ __update_curr(cfs_rq, curr);
curr->delta_exec = 0;
}
- curr->exec_start = now;
+ curr->exec_start = rq_of(cfs_rq)->clock;
}
static inline void
-update_stats_wait_start(struct cfs_rq *cfs_rq, struct sched_entity *se, u64 now)
+update_stats_wait_start(struct cfs_rq *cfs_rq, struct sched_entity *se)
{
se->wait_start_fair = cfs_rq->fair_clock;
- se->wait_start = now;
+ schedstat_set(se->wait_start, rq_of(cfs_rq)->clock);
}
/*
/*
* Task is being enqueued - update stats:
*/
-static void
-update_stats_enqueue(struct cfs_rq *cfs_rq, struct sched_entity *se, u64 now)
+static void update_stats_enqueue(struct cfs_rq *cfs_rq, struct sched_entity *se)
{
s64 key;
* a dequeue/enqueue event is a NOP)
*/
if (se != cfs_rq_curr(cfs_rq))
- update_stats_wait_start(cfs_rq, se, now);
+ update_stats_wait_start(cfs_rq, se);
/*
* Update the key:
*/
(WMULT_SHIFT - NICE_0_SHIFT);
} else {
tmp = se->wait_runtime;
- key -= (tmp * se->load.weight) >> NICE_0_SHIFT;
+ key -= (tmp * se->load.inv_weight) >>
+ (WMULT_SHIFT - NICE_0_SHIFT);
}
}
* 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, u64 now)
+__update_stats_wait_end(struct cfs_rq *cfs_rq, struct sched_entity *se)
{
unsigned long delta_fair = se->delta_fair_run;
-#ifdef CONFIG_SCHEDSTATS
- {
- s64 delta_wait = now - se->wait_start;
- if (unlikely(delta_wait > se->wait_max))
- se->wait_max = delta_wait;
- }
-#endif
+ schedstat_set(se->wait_max, max(se->wait_max,
+ rq_of(cfs_rq)->clock - se->wait_start));
if (unlikely(se->load.weight != NICE_0_LOAD))
delta_fair = calc_weighted(delta_fair, se->load.weight,
}
static void
-update_stats_wait_end(struct cfs_rq *cfs_rq, struct sched_entity *se, u64 now)
+update_stats_wait_end(struct cfs_rq *cfs_rq, struct sched_entity *se)
{
unsigned long delta_fair;
se->delta_fair_run += delta_fair;
if (unlikely(abs(se->delta_fair_run) >=
sysctl_sched_stat_granularity)) {
- __update_stats_wait_end(cfs_rq, se, now);
+ __update_stats_wait_end(cfs_rq, se);
se->delta_fair_run = 0;
}
se->wait_start_fair = 0;
- se->wait_start = 0;
+ schedstat_set(se->wait_start, 0);
}
static inline void
-update_stats_dequeue(struct cfs_rq *cfs_rq, struct sched_entity *se, u64 now)
+update_stats_dequeue(struct cfs_rq *cfs_rq, struct sched_entity *se)
{
- update_curr(cfs_rq, now);
+ update_curr(cfs_rq);
/*
* Mark the end of the wait period if dequeueing a
* waiting task:
*/
if (se != cfs_rq_curr(cfs_rq))
- update_stats_wait_end(cfs_rq, se, now);
+ update_stats_wait_end(cfs_rq, se);
}
/*
* We are picking a new current task - update its stats:
*/
static inline void
-update_stats_curr_start(struct cfs_rq *cfs_rq, struct sched_entity *se, u64 now)
+update_stats_curr_start(struct cfs_rq *cfs_rq, struct sched_entity *se)
{
/*
* We are starting a new run period:
*/
- se->exec_start = now;
+ se->exec_start = rq_of(cfs_rq)->clock;
}
/*
* We are descheduling a task - update its stats:
*/
static inline void
-update_stats_curr_end(struct cfs_rq *cfs_rq, struct sched_entity *se, u64 now)
+update_stats_curr_end(struct cfs_rq *cfs_rq, struct sched_entity *se)
{
se->exec_start = 0;
}
* Scheduling class queueing methods:
*/
-static void
-__enqueue_sleeper(struct cfs_rq *cfs_rq, struct sched_entity *se, u64 now)
+static void __enqueue_sleeper(struct cfs_rq *cfs_rq, struct sched_entity *se)
{
unsigned long load = cfs_rq->load.weight, delta_fair;
long prev_runtime;
+ /*
+ * Do not boost sleepers if there's too much bonus 'in flight'
+ * already:
+ */
+ if (unlikely(cfs_rq->sleeper_bonus > sysctl_sched_runtime_limit))
+ return;
+
if (sysctl_sched_features & SCHED_FEAT_SLEEPER_LOAD_AVG)
load = rq_of(cfs_rq)->cpu_load[2];
prev_runtime = se->wait_runtime;
__add_wait_runtime(cfs_rq, se, delta_fair);
+ schedstat_add(cfs_rq, wait_runtime, se->wait_runtime);
delta_fair = se->wait_runtime - prev_runtime;
/*
* Track the amount of bonus we've given to sleepers:
*/
cfs_rq->sleeper_bonus += delta_fair;
-
- schedstat_add(cfs_rq, wait_runtime, se->wait_runtime);
}
-static void
-enqueue_sleeper(struct cfs_rq *cfs_rq, struct sched_entity *se, u64 now)
+static void enqueue_sleeper(struct cfs_rq *cfs_rq, struct sched_entity *se)
{
struct task_struct *tsk = task_of(se);
unsigned long delta_fair;
se->delta_fair_sleep += delta_fair;
if (unlikely(abs(se->delta_fair_sleep) >=
sysctl_sched_stat_granularity)) {
- __enqueue_sleeper(cfs_rq, se, now);
+ __enqueue_sleeper(cfs_rq, se);
se->delta_fair_sleep = 0;
}
#ifdef CONFIG_SCHEDSTATS
if (se->sleep_start) {
- u64 delta = now - se->sleep_start;
+ u64 delta = rq_of(cfs_rq)->clock - se->sleep_start;
if ((s64)delta < 0)
delta = 0;
se->sum_sleep_runtime += delta;
}
if (se->block_start) {
- u64 delta = now - se->block_start;
+ u64 delta = rq_of(cfs_rq)->clock - se->block_start;
if ((s64)delta < 0)
delta = 0;
}
static void
-enqueue_entity(struct cfs_rq *cfs_rq, struct sched_entity *se,
- int wakeup, u64 now)
+enqueue_entity(struct cfs_rq *cfs_rq, struct sched_entity *se, int wakeup)
{
/*
* Update the fair clock.
*/
- update_curr(cfs_rq, now);
+ update_curr(cfs_rq);
if (wakeup)
- enqueue_sleeper(cfs_rq, se, now);
+ enqueue_sleeper(cfs_rq, se);
- update_stats_enqueue(cfs_rq, se, now);
+ update_stats_enqueue(cfs_rq, se);
__enqueue_entity(cfs_rq, se);
}
static void
-dequeue_entity(struct cfs_rq *cfs_rq, struct sched_entity *se,
- int sleep, u64 now)
+dequeue_entity(struct cfs_rq *cfs_rq, struct sched_entity *se, int sleep)
{
- update_stats_dequeue(cfs_rq, se, now);
+ update_stats_dequeue(cfs_rq, se);
if (sleep) {
se->sleep_start_fair = cfs_rq->fair_clock;
#ifdef CONFIG_SCHEDSTATS
struct task_struct *tsk = task_of(se);
if (tsk->state & TASK_INTERRUPTIBLE)
- se->sleep_start = now;
+ se->sleep_start = rq_of(cfs_rq)->clock;
if (tsk->state & TASK_UNINTERRUPTIBLE)
- se->block_start = now;
+ se->block_start = rq_of(cfs_rq)->clock;
}
cfs_rq->wait_runtime -= se->wait_runtime;
#endif
}
static inline void
-set_next_entity(struct cfs_rq *cfs_rq, struct sched_entity *se, u64 now)
+set_next_entity(struct cfs_rq *cfs_rq, struct sched_entity *se)
{
/*
* Any task has to be enqueued before it get to execute on
* done a put_prev_task_fair() shortly before this, which
* updated rq->fair_clock - used by update_stats_wait_end())
*/
- update_stats_wait_end(cfs_rq, se, now);
- update_stats_curr_start(cfs_rq, se, now);
+ update_stats_wait_end(cfs_rq, se);
+ update_stats_curr_start(cfs_rq, se);
set_cfs_rq_curr(cfs_rq, se);
}
-static struct sched_entity *pick_next_entity(struct cfs_rq *cfs_rq, u64 now)
+static struct sched_entity *pick_next_entity(struct cfs_rq *cfs_rq)
{
struct sched_entity *se = __pick_next_entity(cfs_rq);
- set_next_entity(cfs_rq, se, now);
+ set_next_entity(cfs_rq, se);
return se;
}
-static void
-put_prev_entity(struct cfs_rq *cfs_rq, struct sched_entity *prev, u64 now)
+static void put_prev_entity(struct cfs_rq *cfs_rq, struct sched_entity *prev)
{
/*
* If still on the runqueue then deactivate_task()
* was not called and update_curr() has to be done:
*/
if (prev->on_rq)
- update_curr(cfs_rq, now);
+ update_curr(cfs_rq);
- update_stats_curr_end(cfs_rq, prev, now);
+ update_stats_curr_end(cfs_rq, prev);
if (prev->on_rq)
- update_stats_wait_start(cfs_rq, prev, now);
+ update_stats_wait_start(cfs_rq, prev);
set_cfs_rq_curr(cfs_rq, NULL);
}
static void entity_tick(struct cfs_rq *cfs_rq, struct sched_entity *curr)
{
- struct rq *rq = rq_of(cfs_rq);
struct sched_entity *next;
- u64 now = __rq_clock(rq);
/*
* Dequeue and enqueue the task to update its
* position within the tree:
*/
- dequeue_entity(cfs_rq, curr, 0, now);
- enqueue_entity(cfs_rq, curr, 0, now);
+ dequeue_entity(cfs_rq, curr, 0);
+ enqueue_entity(cfs_rq, curr, 0);
/*
* Reschedule if another task tops the current one.
if (next == curr)
return;
- __check_preempt_curr_fair(cfs_rq, next, curr, sysctl_sched_granularity);
+ __check_preempt_curr_fair(cfs_rq, next, curr,
+ sched_granularity(cfs_rq));
}
/**************************************************
* increased. Here we update the fair scheduling stats and
* then put the task into the rbtree:
*/
-static void
-enqueue_task_fair(struct rq *rq, struct task_struct *p, int wakeup, u64 now)
+static void enqueue_task_fair(struct rq *rq, struct task_struct *p, int wakeup)
{
struct cfs_rq *cfs_rq;
struct sched_entity *se = &p->se;
if (se->on_rq)
break;
cfs_rq = cfs_rq_of(se);
- enqueue_entity(cfs_rq, se, wakeup, now);
+ enqueue_entity(cfs_rq, se, wakeup);
}
}
* decreased. We remove the task from the rbtree and
* update the fair scheduling stats:
*/
-static void
-dequeue_task_fair(struct rq *rq, struct task_struct *p, int sleep, u64 now)
+static void dequeue_task_fair(struct rq *rq, struct task_struct *p, int sleep)
{
struct cfs_rq *cfs_rq;
struct sched_entity *se = &p->se;
for_each_sched_entity(se) {
cfs_rq = cfs_rq_of(se);
- dequeue_entity(cfs_rq, se, sleep, now);
+ dequeue_entity(cfs_rq, se, sleep);
/* Don't dequeue parent if it has other entities besides us */
if (cfs_rq->load.weight)
break;
static void yield_task_fair(struct rq *rq, struct task_struct *p)
{
struct cfs_rq *cfs_rq = task_cfs_rq(p);
- u64 now = __rq_clock(rq);
+ __update_rq_clock(rq);
/*
* Dequeue and enqueue the task to update its
* position within the tree:
*/
- dequeue_entity(cfs_rq, &p->se, 0, now);
- enqueue_entity(cfs_rq, &p->se, 0, now);
+ dequeue_entity(cfs_rq, &p->se, 0);
+ enqueue_entity(cfs_rq, &p->se, 0);
}
/*
unsigned long gran;
if (unlikely(rt_prio(p->prio))) {
- update_curr(cfs_rq, rq_clock(rq));
+ update_rq_clock(rq);
+ update_curr(cfs_rq);
resched_task(curr);
return;
}
__check_preempt_curr_fair(cfs_rq, &p->se, &curr->se, gran);
}
-static struct task_struct *pick_next_task_fair(struct rq *rq, u64 now)
+static struct task_struct *pick_next_task_fair(struct rq *rq)
{
struct cfs_rq *cfs_rq = &rq->cfs;
struct sched_entity *se;
return NULL;
do {
- se = pick_next_entity(cfs_rq, now);
+ se = pick_next_entity(cfs_rq);
cfs_rq = group_cfs_rq(se);
} while (cfs_rq);
/*
* Account for a descheduled task:
*/
-static void put_prev_task_fair(struct rq *rq, struct task_struct *prev, u64 now)
+static void put_prev_task_fair(struct rq *rq, struct task_struct *prev)
{
struct sched_entity *se = &prev->se;
struct cfs_rq *cfs_rq;
for_each_sched_entity(se) {
cfs_rq = cfs_rq_of(se);
- put_prev_entity(cfs_rq, se, now);
+ put_prev_entity(cfs_rq, se);
}
}
return __load_balance_iterator(cfs_rq, cfs_rq->rb_load_balance_curr);
}
+#ifdef CONFIG_FAIR_GROUP_SCHED
static int cfs_rq_best_prio(struct cfs_rq *cfs_rq)
{
struct sched_entity *curr;
return p->prio;
}
+#endif
-static int
+static unsigned long
load_balance_fair(struct rq *this_rq, int this_cpu, struct rq *busiest,
- unsigned long max_nr_move, unsigned long max_load_move,
- struct sched_domain *sd, enum cpu_idle_type idle,
- int *all_pinned, unsigned long *total_load_moved)
+ unsigned long max_nr_move, unsigned long max_load_move,
+ struct sched_domain *sd, enum cpu_idle_type idle,
+ int *all_pinned, int *this_best_prio)
{
struct cfs_rq *busy_cfs_rq;
unsigned long load_moved, total_nr_moved = 0, nr_moved;
cfs_rq_iterator.next = load_balance_next_fair;
for_each_leaf_cfs_rq(busiest, busy_cfs_rq) {
+#ifdef CONFIG_FAIR_GROUP_SCHED
struct cfs_rq *this_cfs_rq;
long imbalance;
unsigned long maxload;
- int this_best_prio, best_prio, best_prio_seen = 0;
this_cfs_rq = cpu_cfs_rq(busy_cfs_rq, this_cpu);
- imbalance = busy_cfs_rq->load.weight -
- this_cfs_rq->load.weight;
+ imbalance = busy_cfs_rq->load.weight - this_cfs_rq->load.weight;
/* Don't pull if this_cfs_rq has more load than busy_cfs_rq */
if (imbalance <= 0)
continue;
imbalance /= 2;
maxload = min(rem_load_move, imbalance);
- this_best_prio = cfs_rq_best_prio(this_cfs_rq);
- best_prio = cfs_rq_best_prio(busy_cfs_rq);
-
- /*
- * Enable handling of the case where there is more than one task
- * with the best priority. If the current running task is one
- * of those with prio==best_prio we know it won't be moved
- * and therefore it's safe to override the skip (based on load)
- * of any task we find with that prio.
- */
- if (cfs_rq_curr(busy_cfs_rq) == &busiest->curr->se)
- best_prio_seen = 1;
-
+ *this_best_prio = cfs_rq_best_prio(this_cfs_rq);
+#else
+# define maxload rem_load_move
+#endif
/* pass busy_cfs_rq argument into
* load_balance_[start|next]_fair iterators
*/
cfs_rq_iterator.arg = busy_cfs_rq;
nr_moved = balance_tasks(this_rq, this_cpu, busiest,
max_nr_move, maxload, sd, idle, all_pinned,
- &load_moved, this_best_prio, best_prio,
- best_prio_seen, &cfs_rq_iterator);
+ &load_moved, this_best_prio, &cfs_rq_iterator);
total_nr_moved += nr_moved;
max_nr_move -= nr_moved;
break;
}
- *total_load_moved = max_load_move - rem_load_move;
-
- return total_nr_moved;
+ return max_load_move - rem_load_move;
}
/*
{
struct cfs_rq *cfs_rq = task_cfs_rq(p);
struct sched_entity *se = &p->se;
- u64 now = rq_clock(rq);
sched_info_queued(p);
- update_stats_enqueue(cfs_rq, se, now);
+ update_stats_enqueue(cfs_rq, se);
/*
* Child runs first: we let it run before the parent
* until it reschedules once. We set up the key so that
* it will preempt the parent:
*/
p->se.fair_key = current->se.fair_key -
- niced_granularity(&rq->curr->se, sysctl_sched_granularity) - 1;
+ niced_granularity(&rq->curr->se, sched_granularity(cfs_rq)) - 1;
/*
* The first wait is dominated by the child-runs-first logic,
* so do not credit it with that waiting time yet:
* -granularity/2, so initialize the task with that:
*/
if (sysctl_sched_features & SCHED_FEAT_START_DEBIT)
- p->se.wait_runtime = -(sysctl_sched_granularity / 2);
+ p->se.wait_runtime = -(sched_granularity(cfs_rq) / 2);
__enqueue_entity(cfs_rq, se);
- inc_nr_running(p, rq, now);
}
#ifdef CONFIG_FAIR_GROUP_SCHED
*/
static void set_curr_task_fair(struct rq *rq)
{
- struct task_struct *curr = rq->curr;
- struct sched_entity *se = &curr->se;
- u64 now = rq_clock(rq);
- struct cfs_rq *cfs_rq;
+ struct sched_entity *se = &rq->curr->se;
- for_each_sched_entity(se) {
- cfs_rq = cfs_rq_of(se);
- set_next_entity(cfs_rq, se, now);
- }
+ for_each_sched_entity(se)
+ set_next_entity(cfs_rq_of(se), se);
}
#else
static void set_curr_task_fair(struct rq *rq)
};
#ifdef CONFIG_SCHED_DEBUG
-void print_cfs_stats(struct seq_file *m, int cpu, u64 now)
+static void print_cfs_stats(struct seq_file *m, int cpu)
{
- struct rq *rq = cpu_rq(cpu);
struct cfs_rq *cfs_rq;
- for_each_leaf_cfs_rq(rq, cfs_rq)
- print_cfs_rq(m, cpu, cfs_rq, now);
+ for_each_leaf_cfs_rq(cpu_rq(cpu), cfs_rq)
+ print_cfs_rq(m, cpu, cfs_rq);
}
#endif
projects / linux-2.6-omap-h63xx.git / blobdiff