* 2003-09-03 Interactivity tuning by Con Kolivas.
* 2004-04-02 Scheduler domains code by Nick Piggin
*/
-
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/nmi.h>
#include <asm/uaccess.h>
#include <linux/highmem.h>
#include <linux/smp_lock.h>
+#include <linux/pagemap.h>
#include <asm/mmu_context.h>
#include <linux/interrupt.h>
#include <linux/completion.h>
#include <linux/cpu.h>
#include <linux/percpu.h>
#include <linux/kthread.h>
-#include <asm/tlb.h>
+#include <linux/vserver/sched.h>
+#include <linux/vs_base.h>
+
+#include <asm/unistd.h>
#include <asm/unistd.h>
#define LOW_CREDIT(p) \
((p)->interactive_credit < -CREDIT_LIMIT)
-#define TASK_PREEMPTS_CURR(p, rq) \
- ((p)->prio < (rq)->curr->prio)
-
/*
* BASE_TIMESLICE scales user-nice values [ -20 ... 19 ]
* to time slice values.
/*
* These are the runqueue data structures:
*/
+typedef struct runqueue runqueue_t;
-#define BITMAP_SIZE ((((MAX_PRIO+1+7)/8)+sizeof(long)-1)/sizeof(long))
+#ifdef CONFIG_CKRM_CPU_SCHEDULE
+#include <linux/ckrm_classqueue.h>
+#endif
-typedef struct runqueue runqueue_t;
+#ifdef CONFIG_CKRM_CPU_SCHEDULE
-struct prio_array {
- unsigned int nr_active;
- unsigned long bitmap[BITMAP_SIZE];
- struct list_head queue[MAX_PRIO];
-};
+/**
+ * if belong to different class, compare class priority
+ * otherwise compare task priority
+ */
+#define TASK_PREEMPTS_CURR(p, rq) \
+ (((p)->cpu_class != (rq)->curr->cpu_class) && ((rq)->curr != (rq)->idle))? class_preempts_curr((p),(rq)->curr) : ((p)->prio < (rq)->curr->prio)
+#else
+#define TASK_PREEMPTS_CURR(p, rq) \
+ ((p)->prio < (rq)->curr->prio)
+#endif
/*
* This is the main, per-CPU runqueue data structure.
* remote CPUs use both these fields when doing load calculation.
*/
unsigned long nr_running;
-#ifdef CONFIG_SMP
+#if defined(CONFIG_SMP)
unsigned long cpu_load;
#endif
unsigned long long nr_switches;
unsigned long long timestamp_last_tick;
task_t *curr, *idle;
struct mm_struct *prev_mm;
- prio_array_t *active, *expired, arrays[2];
+#ifdef CONFIG_CKRM_CPU_SCHEDULE
+ unsigned long ckrm_cpu_load;
+ struct classqueue_struct classqueue;
+#else
+ prio_array_t *active, *expired, arrays[2];
+#endif
int best_expired_prio;
atomic_t nr_iowait;
task_t *migration_thread;
struct list_head migration_queue;
#endif
+ struct list_head hold_queue;
+ int idle_tokens;
};
static DEFINE_PER_CPU(struct runqueue, runqueues);
# define task_running(rq, p) ((rq)->curr == (p))
#endif
+#ifdef CONFIG_CKRM_CPU_SCHEDULE
+#include <linux/ckrm_sched.h>
+spinlock_t cvt_lock = SPIN_LOCK_UNLOCKED;
+rwlock_t class_list_lock = RW_LOCK_UNLOCKED;
+LIST_HEAD(active_cpu_classes); // list of active cpu classes; anchor
+struct ckrm_cpu_class default_cpu_class_obj;
+
+/*
+ * the minimum CVT allowed is the base_cvt
+ * otherwise, it will starve others
+ */
+CVT_t get_min_cvt(int cpu)
+{
+ cq_node_t *node;
+ struct ckrm_local_runqueue * lrq;
+ CVT_t min_cvt;
+
+ node = classqueue_get_head(bpt_queue(cpu));
+ lrq = (node) ? class_list_entry(node) : NULL;
+
+ if (lrq)
+ min_cvt = lrq->local_cvt;
+ else
+ min_cvt = 0;
+
+ return min_cvt;
+}
+
+/*
+ * update the classueue base for all the runqueues
+ * TODO: we can only update half of the min_base to solve the movebackward issue
+ */
+static inline void check_update_class_base(int this_cpu) {
+ unsigned long min_base = 0xFFFFFFFF;
+ cq_node_t *node;
+ int i;
+
+ if (! cpu_online(this_cpu)) return;
+
+ /*
+ * find the min_base across all the processors
+ */
+ for_each_online_cpu(i) {
+ /*
+ * I should change it to directly use bpt->base
+ */
+ node = classqueue_get_head(bpt_queue(i));
+ if (node && node->prio < min_base) {
+ min_base = node->prio;
+ }
+ }
+ if (min_base != 0xFFFFFFFF)
+ classqueue_update_base(bpt_queue(this_cpu),min_base);
+}
+
+static inline void ckrm_rebalance_tick(int j,int this_cpu)
+{
+#ifdef CONFIG_CKRM_CPU_SCHEDULE
+ read_lock(&class_list_lock);
+ if (!(j % CVT_UPDATE_TICK))
+ update_global_cvts(this_cpu);
+
+#define CKRM_BASE_UPDATE_RATE 400
+ if (! (jiffies % CKRM_BASE_UPDATE_RATE))
+ check_update_class_base(this_cpu);
+
+ read_unlock(&class_list_lock);
+#endif
+}
+
+static inline struct ckrm_local_runqueue *rq_get_next_class(struct runqueue *rq)
+{
+ cq_node_t *node = classqueue_get_head(&rq->classqueue);
+ return ((node) ? class_list_entry(node) : NULL);
+}
+
+static inline struct task_struct * rq_get_next_task(struct runqueue* rq)
+{
+ prio_array_t *array;
+ struct task_struct *next;
+ struct ckrm_local_runqueue *queue;
+ int cpu = smp_processor_id();
+
+ next = rq->idle;
+ retry_next_class:
+ if ((queue = rq_get_next_class(rq))) {
+ array = queue->active;
+ //check switch active/expired queue
+ if (unlikely(!queue->active->nr_active)) {
+ queue->active = queue->expired;
+ queue->expired = array;
+ queue->expired_timestamp = 0;
+
+ if (queue->active->nr_active)
+ set_top_priority(queue,
+ find_first_bit(queue->active->bitmap, MAX_PRIO));
+ else {
+ classqueue_dequeue(queue->classqueue,
+ &queue->classqueue_linkobj);
+ cpu_demand_event(get_rq_local_stat(queue,cpu),CPU_DEMAND_DEQUEUE,0);
+ }
+
+ goto retry_next_class;
+ }
+ BUG_ON(!queue->active->nr_active);
+ next = task_list_entry(array->queue[queue->top_priority].next);
+ }
+ return next;
+}
+
+static inline void rq_load_inc(runqueue_t *rq, struct task_struct *p) { rq->ckrm_cpu_load += cpu_class_weight(p->cpu_class); }
+static inline void rq_load_dec(runqueue_t *rq, struct task_struct *p) { rq->ckrm_cpu_load -= cpu_class_weight(p->cpu_class); }
+
+#else /*CONFIG_CKRM_CPU_SCHEDULE*/
+
+static inline struct task_struct * rq_get_next_task(struct runqueue* rq)
+{
+ prio_array_t *array;
+ struct list_head *queue;
+ int idx;
+
+ array = rq->active;
+ if (unlikely(!array->nr_active)) {
+ /*
+ * Switch the active and expired arrays.
+ */
+ rq->active = rq->expired;
+ rq->expired = array;
+ array = rq->active;
+ rq->expired_timestamp = 0;
+ rq->best_expired_prio = MAX_PRIO;
+ }
+
+ idx = sched_find_first_bit(array->bitmap);
+ queue = array->queue + idx;
+ return list_entry(queue->next, task_t, run_list);
+}
+
+static inline void class_enqueue_task(struct task_struct* p, prio_array_t *array) { }
+static inline void class_dequeue_task(struct task_struct* p, prio_array_t *array) { }
+static inline void init_cpu_classes(void) { }
+static inline void rq_load_inc(runqueue_t *rq, struct task_struct *p) { }
+static inline void rq_load_dec(runqueue_t *rq, struct task_struct *p) { }
+#endif /* CONFIG_CKRM_CPU_SCHEDULE */
+
+
/*
* task_rq_lock - lock the runqueue a given task resides on and disable
* interrupts. Note the ordering: we can safely lookup the task_rq without
* explicitly disabling preemption.
*/
-static runqueue_t *task_rq_lock(task_t *p, unsigned long *flags)
+runqueue_t *task_rq_lock(task_t *p, unsigned long *flags)
{
struct runqueue *rq;
return rq;
}
-static inline void task_rq_unlock(runqueue_t *rq, unsigned long *flags)
+void task_rq_unlock(runqueue_t *rq, unsigned long *flags)
{
spin_unlock_irqrestore(&rq->lock, *flags);
}
/*
* Adding/removing a task to/from a priority array:
*/
-static void dequeue_task(struct task_struct *p, prio_array_t *array)
+void dequeue_task(struct task_struct *p, prio_array_t *array)
{
+ BUG_ON(! array);
array->nr_active--;
list_del(&p->run_list);
if (list_empty(array->queue + p->prio))
__clear_bit(p->prio, array->bitmap);
+ class_dequeue_task(p,array);
}
-static void enqueue_task(struct task_struct *p, prio_array_t *array)
+void enqueue_task(struct task_struct *p, prio_array_t *array)
{
list_add_tail(&p->run_list, array->queue + p->prio);
__set_bit(p->prio, array->bitmap);
array->nr_active++;
p->array = array;
+ class_enqueue_task(p,array);
}
/*
__set_bit(p->prio, array->bitmap);
array->nr_active++;
p->array = array;
+ class_enqueue_task(p,array);
}
/*
bonus = CURRENT_BONUS(p) - MAX_BONUS / 2;
prio = p->static_prio - bonus;
+ if (__vx_task_flags(p, VXF_SCHED_PRIO, 0))
+ prio += effective_vavavoom(p, MAX_USER_PRIO);
+
if (prio < MAX_RT_PRIO)
prio = MAX_RT_PRIO;
if (prio > MAX_PRIO-1)
*/
static inline void __activate_task(task_t *p, runqueue_t *rq)
{
- enqueue_task(p, rq->active);
+ enqueue_task(p, rq_active(p,rq));
rq->nr_running++;
+ rq_load_inc(rq,p);
}
/*
*/
static inline void __activate_idle_task(task_t *p, runqueue_t *rq)
{
- enqueue_task_head(p, rq->active);
+ enqueue_task_head(p, rq_active(p,rq));
rq->nr_running++;
+ rq_load_inc(rq,p);
}
static void recalc_task_prio(task_t *p, unsigned long long now)
static void deactivate_task(struct task_struct *p, runqueue_t *rq)
{
rq->nr_running--;
+ rq_load_dec(rq,p);
if (p->state == TASK_UNINTERRUPTIBLE)
rq->nr_uninterruptible++;
dequeue_task(p, p->array);
return cpu;
cpus_and(tmp, sd->span, cpu_online_map);
- cpus_and(tmp, tmp, p->cpus_allowed);
-
for_each_cpu_mask(i, tmp) {
+ if (!cpu_isset(i, p->cpus_allowed))
+ continue;
+
if (idle_cpu(i))
return i;
}
p->array = current->array;
p->array->nr_active++;
rq->nr_running++;
+ rq_load_inc(rq,p);
}
task_rq_unlock(rq, &flags);
}
{
unsigned long i, sum = 0;
- for_each_cpu(i)
+ for_each_online_cpu(i)
sum += cpu_rq(i)->nr_uninterruptible;
return sum;
{
unsigned long long i, sum = 0;
- for_each_cpu(i)
+ for_each_online_cpu(i)
sum += cpu_rq(i)->nr_switches;
return sum;
{
unsigned long i, sum = 0;
- for_each_cpu(i)
+ for_each_online_cpu(i)
sum += atomic_read(&cpu_rq(i)->nr_iowait);
return sum;
p->array = current->array;
p->array->nr_active++;
rq->nr_running++;
+ rq_load_inc(rq,p);
}
} else {
/* Not the local CPU - must adjust timestamp */
{
dequeue_task(p, src_array);
src_rq->nr_running--;
+ rq_load_dec(src_rq,p);
+
set_task_cpu(p, this_cpu);
this_rq->nr_running++;
+ rq_load_inc(this_rq,p);
enqueue_task(p, this_array);
+
p->timestamp = (p->timestamp - src_rq->timestamp_last_tick)
+ this_rq->timestamp_last_tick;
/*
return 1;
}
+#ifdef CONFIG_CKRM_CPU_SCHEDULE
+
+struct ckrm_cpu_class *find_unbalanced_class(int busiest_cpu, int this_cpu, unsigned long *cls_imbalance)
+{
+ struct ckrm_cpu_class *most_unbalanced_class = NULL;
+ struct ckrm_cpu_class *clsptr;
+ int max_unbalance = 0;
+
+ list_for_each_entry(clsptr,&active_cpu_classes,links) {
+ struct ckrm_local_runqueue *this_lrq = get_ckrm_local_runqueue(clsptr,this_cpu);
+ struct ckrm_local_runqueue *busiest_lrq = get_ckrm_local_runqueue(clsptr,busiest_cpu);
+ int unbalance_degree;
+
+ unbalance_degree = (local_queue_nr_running(busiest_lrq) - local_queue_nr_running(this_lrq)) * cpu_class_weight(clsptr);
+ if (unbalance_degree >= *cls_imbalance)
+ continue; // already looked at this class
+
+ if (unbalance_degree > max_unbalance) {
+ max_unbalance = unbalance_degree;
+ most_unbalanced_class = clsptr;
+ }
+ }
+ *cls_imbalance = max_unbalance;
+ return most_unbalanced_class;
+}
+
+
+/*
+ * find_busiest_queue - find the busiest runqueue among the cpus in cpumask.
+ */
+static int find_busiest_cpu(runqueue_t *this_rq, int this_cpu, int idle,
+ int *imbalance)
+{
+ int cpu_load, load, max_load, i, busiest_cpu;
+ runqueue_t *busiest, *rq_src;
+
+
+ /*Hubertus ... the concept of nr_running is replace with cpu_load */
+ cpu_load = this_rq->ckrm_cpu_load;
+
+ busiest = NULL;
+ busiest_cpu = -1;
+
+ max_load = -1;
+ for_each_online_cpu(i) {
+ rq_src = cpu_rq(i);
+ load = rq_src->ckrm_cpu_load;
+
+ if ((load > max_load) && (rq_src != this_rq)) {
+ busiest = rq_src;
+ busiest_cpu = i;
+ max_load = load;
+ }
+ }
+
+ if (likely(!busiest))
+ goto out;
+
+ *imbalance = max_load - cpu_load;
+
+ /* It needs an at least ~25% imbalance to trigger balancing. */
+ if (!idle && ((*imbalance)*4 < max_load)) {
+ busiest = NULL;
+ goto out;
+ }
+
+ double_lock_balance(this_rq, busiest);
+ /*
+ * Make sure nothing changed since we checked the
+ * runqueue length.
+ */
+ if (busiest->ckrm_cpu_load <= cpu_load) {
+ spin_unlock(&busiest->lock);
+ busiest = NULL;
+ }
+out:
+ return (busiest ? busiest_cpu : -1);
+}
+
+static int load_balance(int this_cpu, runqueue_t *this_rq,
+ struct sched_domain *sd, enum idle_type idle)
+{
+ int imbalance, idx;
+ int busiest_cpu;
+ runqueue_t *busiest;
+ prio_array_t *array;
+ struct list_head *head, *curr;
+ task_t *tmp;
+ struct ckrm_local_runqueue * busiest_local_queue;
+ struct ckrm_cpu_class *clsptr;
+ int weight;
+ unsigned long cls_imbalance; // so we can retry other classes
+
+ // need to update global CVT based on local accumulated CVTs
+ read_lock(&class_list_lock);
+ busiest_cpu = find_busiest_cpu(this_rq, this_cpu, idle, &imbalance);
+ if (busiest_cpu == -1)
+ goto out;
+
+ busiest = cpu_rq(busiest_cpu);
+
+ /*
+ * We only want to steal a number of tasks equal to 1/2 the imbalance,
+ * otherwise we'll just shift the imbalance to the new queue:
+ */
+ imbalance /= 2;
+
+ /* now find class on that runqueue with largest inbalance */
+ cls_imbalance = 0xFFFFFFFF;
+
+ retry_other_class:
+ clsptr = find_unbalanced_class(busiest_cpu, this_cpu, &cls_imbalance);
+ if (!clsptr)
+ goto out_unlock;
+
+ busiest_local_queue = get_ckrm_local_runqueue(clsptr,busiest_cpu);
+ weight = cpu_class_weight(clsptr);
+
+ /*
+ * We first consider expired tasks. Those will likely not be
+ * executed in the near future, and they are most likely to
+ * be cache-cold, thus switching CPUs has the least effect
+ * on them.
+ */
+ if (busiest_local_queue->expired->nr_active)
+ array = busiest_local_queue->expired;
+ else
+ array = busiest_local_queue->active;
+
+ new_array:
+ /* Start searching at priority 0: */
+ idx = 0;
+ skip_bitmap:
+ if (!idx)
+ idx = sched_find_first_bit(array->bitmap);
+ else
+ idx = find_next_bit(array->bitmap, MAX_PRIO, idx);
+ if (idx >= MAX_PRIO) {
+ if (array == busiest_local_queue->expired && busiest_local_queue->active->nr_active) {
+ array = busiest_local_queue->active;
+ goto new_array;
+ }
+ goto retry_other_class;
+ }
+
+ head = array->queue + idx;
+ curr = head->prev;
+ skip_queue:
+ tmp = list_entry(curr, task_t, run_list);
+
+ curr = curr->prev;
+
+ if (!can_migrate_task(tmp, busiest, this_cpu, sd,idle)) {
+ if (curr != head)
+ goto skip_queue;
+ idx++;
+ goto skip_bitmap;
+ }
+ pull_task(busiest, array, tmp, this_rq, rq_active(tmp,this_rq),this_cpu);
+ /*
+ * tmp BUG FIX: hzheng
+ * load balancing can make the busiest local queue empty
+ * thus it should be removed from bpt
+ */
+ if (! local_queue_nr_running(busiest_local_queue)) {
+ classqueue_dequeue(busiest_local_queue->classqueue,&busiest_local_queue->classqueue_linkobj);
+ cpu_demand_event(get_rq_local_stat(busiest_local_queue,busiest_cpu),CPU_DEMAND_DEQUEUE,0);
+ }
+
+ imbalance -= weight;
+ if (!idle && (imbalance>0)) {
+ if (curr != head)
+ goto skip_queue;
+ idx++;
+ goto skip_bitmap;
+ }
+ out_unlock:
+ spin_unlock(&busiest->lock);
+ out:
+ read_unlock(&class_list_lock);
+ return 0;
+}
+
+
+static inline void idle_balance(int this_cpu, runqueue_t *this_rq)
+{
+}
+#else /* CONFIG_CKRM_CPU_SCHEDULE */
/*
* move_tasks tries to move up to max_nr_move tasks from busiest to this_rq,
* as part of a balancing operation within "domain". Returns the number of
next_group:
group = group->next;
} while (group != sd->groups);
+>>>>>>> 1.1.9.3
}
+#endif /* CONFIG_CKRM_CPU_SCHEDULE*/
/*
* rebalance_tick will get called every timer tick, on every CPU.
unsigned long j = jiffies + CPU_OFFSET(this_cpu);
struct sched_domain *sd;
+ ckrm_rebalance_tick(j,this_cpu);
+
/* Update our load */
old_load = this_rq->cpu_load;
this_load = this_rq->nr_running * SCHED_LOAD_SCALE;
}
}
}
-#else
+#else /* SMP*/
/*
* on UP we do not need to balance between CPUs:
*/
static inline void rebalance_tick(int cpu, runqueue_t *rq, enum idle_type idle)
{
+ ckrm_rebalance_tick(jiffies,cpu);
}
+
static inline void idle_balance(int cpu, runqueue_t *rq)
{
}
return 0;
}
-DEFINE_PER_CPU(struct kernel_stat, kstat);
+DEFINE_PER_CPU(struct kernel_stat, kstat) = { { 0 } };
EXPORT_PER_CPU_SYMBOL(kstat);
* increasing number of running tasks. We also ignore the interactivity
* if a better static_prio task has expired:
*/
+
+#ifndef CONFIG_CKRM_CPU_SCHEDULE
#define EXPIRED_STARVING(rq) \
((STARVATION_LIMIT && ((rq)->expired_timestamp && \
(jiffies - (rq)->expired_timestamp >= \
STARVATION_LIMIT * ((rq)->nr_running) + 1))) || \
((rq)->curr->static_prio > (rq)->best_expired_prio))
+#else
+#define EXPIRED_STARVING(rq) \
+ (STARVATION_LIMIT && ((rq)->expired_timestamp && \
+ (jiffies - (rq)->expired_timestamp >= \
+ STARVATION_LIMIT * (local_queue_nr_running(rq)) + 1)))
+#endif
/*
* This function gets called by the timer code, with HZ frequency.
}
if (p == rq->idle) {
+ if (!--rq->idle_tokens && !list_empty(&rq->hold_queue))
+ set_need_resched();
+
if (atomic_read(&rq->nr_iowait) > 0)
cpustat->iowait += sys_ticks;
else
cpustat->system += sys_ticks;
/* Task might have expired already, but not scheduled off yet */
- if (p->array != rq->active) {
+ if (p->array != rq_active(p,rq)) {
set_tsk_need_resched(p);
goto out;
}
set_tsk_need_resched(p);
/* put it at the end of the queue: */
- dequeue_task(p, rq->active);
- enqueue_task(p, rq->active);
+ dequeue_task(p, rq_active(p,rq));
+ enqueue_task(p, rq_active(p,rq));
}
goto out_unlock;
}
- if (!--p->time_slice) {
+#warning MEF PLANETLAB: "if (vx_need_resched(p)) was if (!--p->time_slice) */"
+ if (vx_need_resched(p)) {
+#ifdef CONFIG_CKRM_CPU_SCHEDULE
+ /* Hubertus ... we can abstract this out */
+ struct ckrm_local_runqueue* rq = get_task_class_queue(p);
+#endif
dequeue_task(p, rq->active);
set_tsk_need_resched(p);
p->prio = effective_prio(p);
rq->expired_timestamp = jiffies;
if (!TASK_INTERACTIVE(p) || EXPIRED_STARVING(rq)) {
enqueue_task(p, rq->expired);
- if (p->static_prio < rq->best_expired_prio)
- rq->best_expired_prio = p->static_prio;
+ if (p->static_prio < this_rq()->best_expired_prio)
+ this_rq()->best_expired_prio = p->static_prio;
} else
enqueue_task(p, rq->active);
} else {
if (TASK_INTERACTIVE(p) && !((task_timeslice(p) -
p->time_slice) % TIMESLICE_GRANULARITY(p)) &&
(p->time_slice >= TIMESLICE_GRANULARITY(p)) &&
- (p->array == rq->active)) {
+ (p->array == rq_active(p,rq))) {
- dequeue_task(p, rq->active);
+ dequeue_task(p, rq_active(p,rq));
set_tsk_need_resched(p);
p->prio = effective_prio(p);
- enqueue_task(p, rq->active);
+ enqueue_task(p, rq_active(p,rq));
}
}
out_unlock:
task_t *prev, *next;
runqueue_t *rq;
prio_array_t *array;
- struct list_head *queue;
unsigned long long now;
unsigned long run_time;
- int cpu, idx;
+ int cpu;
+#ifdef CONFIG_VSERVER_HARDCPU
+ struct vx_info *vxi;
+ int maxidle = -HZ;
+#endif
/*
* Test if we are atomic. Since do_exit() needs to call into
}
cpu = smp_processor_id();
+#ifdef CONFIG_VSERVER_HARDCPU
+ if (!list_empty(&rq->hold_queue)) {
+ struct list_head *l, *n;
+ int ret;
+
+ vxi = NULL;
+ list_for_each_safe(l, n, &rq->hold_queue) {
+ next = list_entry(l, task_t, run_list);
+ if (vxi == next->vx_info)
+ continue;
+
+ vxi = next->vx_info;
+ ret = vx_tokens_recalc(vxi);
+ // tokens = vx_tokens_avail(next);
+
+ if (ret > 0) {
+ list_del(&next->run_list);
+ next->state &= ~TASK_ONHOLD;
+ recalc_task_prio(next, now);
+ __activate_task(next, rq);
+ // printk("ยทยทยท unhold %p\n", next);
+ break;
+ }
+ if ((ret < 0) && (maxidle < ret))
+ maxidle = ret;
+ }
+ }
+ rq->idle_tokens = -maxidle;
+
+pick_next:
+#endif
if (unlikely(!rq->nr_running)) {
idle_balance(cpu, rq);
if (!rq->nr_running) {
}
}
- array = rq->active;
- if (unlikely(!array->nr_active)) {
- /*
- * Switch the active and expired arrays.
- */
- rq->active = rq->expired;
- rq->expired = array;
- array = rq->active;
- rq->expired_timestamp = 0;
- rq->best_expired_prio = MAX_PRIO;
- }
-
- idx = sched_find_first_bit(array->bitmap);
- queue = array->queue + idx;
- next = list_entry(queue->next, task_t, run_list);
+ next = rq_get_next_task(rq);
+ if (next == rq->idle)
+ goto switch_tasks;
if (dependent_sleeper(cpu, rq, next)) {
next = rq->idle;
goto switch_tasks;
}
+#ifdef CONFIG_VSERVER_HARDCPU
+ vxi = next->vx_info;
+ if (vxi && __vx_flags(vxi->vx_flags,
+ VXF_SCHED_PAUSE|VXF_SCHED_HARD, 0)) {
+ int ret = vx_tokens_recalc(vxi);
+
+ if (unlikely(ret <= 0)) {
+ if (ret && (rq->idle_tokens > -ret))
+ rq->idle_tokens = -ret;
+ deactivate_task(next, rq);
+ list_add_tail(&next->run_list, &rq->hold_queue);
+ next->state |= TASK_ONHOLD;
+ goto pick_next;
+ }
+ }
+#endif
+
if (!rt_task(next) && next->activated > 0) {
unsigned long long delta = now - next->timestamp;
clear_tsk_need_resched(prev);
RCU_qsctr(task_cpu(prev))++;
+#ifdef CONFIG_CKRM_CPU_SCHEDULE
+ if (prev != rq->idle) {
+ unsigned long long run = now - prev->timestamp;
+ cpu_demand_event(get_task_local_stat(prev),CPU_DEMAND_DESCHEDULE,run);
+ update_local_cvt(prev, run);
+ }
+#endif
+
prev->sleep_avg -= run_time;
if ((long)prev->sleep_avg <= 0) {
prev->sleep_avg = 0;
if (!(HIGH_CREDIT(prev) || LOW_CREDIT(prev)))
prev->interactive_credit--;
}
+ add_delay_ts(prev,runcpu_total,prev->timestamp,now);
prev->timestamp = now;
if (likely(prev != next)) {
+ add_delay_ts(next,waitcpu_total,next->timestamp,now);
+ inc_delay(next,runs);
next->timestamp = now;
rq->nr_switches++;
rq->curr = next;
__remove_wait_queue(q, &wait); \
spin_unlock_irqrestore(&q->lock, flags);
+#define SLEEP_ON_BKLCHECK \
+ if (unlikely(!kernel_locked()) && \
+ sleep_on_bkl_warnings < 10) { \
+ sleep_on_bkl_warnings++; \
+ WARN_ON(1); \
+ }
+
+static int sleep_on_bkl_warnings;
+
void fastcall __sched interruptible_sleep_on(wait_queue_head_t *q)
{
SLEEP_ON_VAR
+ SLEEP_ON_BKLCHECK
+
current->state = TASK_INTERRUPTIBLE;
SLEEP_ON_HEAD
{
SLEEP_ON_VAR
+ SLEEP_ON_BKLCHECK
+
current->state = TASK_INTERRUPTIBLE;
SLEEP_ON_HEAD
EXPORT_SYMBOL(interruptible_sleep_on_timeout);
-void fastcall __sched sleep_on(wait_queue_head_t *q)
-{
- SLEEP_ON_VAR
-
- current->state = TASK_UNINTERRUPTIBLE;
-
- SLEEP_ON_HEAD
- schedule();
- SLEEP_ON_TAIL
-}
-
-EXPORT_SYMBOL(sleep_on);
-
long fastcall __sched sleep_on_timeout(wait_queue_head_t *q, long timeout)
{
SLEEP_ON_VAR
+ SLEEP_ON_BKLCHECK
+
current->state = TASK_UNINTERRUPTIBLE;
SLEEP_ON_HEAD
return retval;
}
-/*
- * Represents all cpu's present in the system
- * In systems capable of hotplug, this map could dynamically grow
- * as new cpu's are detected in the system via any platform specific
- * method, such as ACPI for e.g.
- */
-
-cpumask_t cpu_present_map;
-EXPORT_SYMBOL(cpu_present_map);
-
-#ifndef CONFIG_SMP
-cpumask_t cpu_online_map = CPU_MASK_ALL;
-cpumask_t cpu_possible_map = CPU_MASK_ALL;
-#endif
-
/**
* sys_sched_getaffinity - get the cpu affinity of a process
* @pid: pid of the process
{
runqueue_t *rq = this_rq_lock();
prio_array_t *array = current->array;
- prio_array_t *target = rq->expired;
+ prio_array_t *target = rq_expired(current,rq);
/*
* We implement yielding by moving the task into the expired
* array.)
*/
if (unlikely(rt_task(current)))
- target = rq->active;
+ target = rq_active(current,rq);
dequeue_task(current, array);
enqueue_task(current, target);
void __sched io_schedule(void)
{
struct runqueue *rq = this_rq();
+ def_delay_var(dstart);
+ start_delay_set(dstart,PF_IOWAIT);
atomic_inc(&rq->nr_iowait);
schedule();
atomic_dec(&rq->nr_iowait);
+ add_io_delay(dstart);
}
EXPORT_SYMBOL(io_schedule);
{
struct runqueue *rq = this_rq();
long ret;
+ def_delay_var(dstart);
+ start_delay_set(dstart,PF_IOWAIT);
atomic_inc(&rq->nr_iowait);
ret = schedule_timeout(timeout);
atomic_dec(&rq->nr_iowait);
+ add_io_delay(dstart);
return ret;
}
runqueue_t *rq;
rq = task_rq_lock(p, &flags);
- if (!cpus_intersects(new_mask, cpu_online_map)) {
+ if (any_online_cpu(new_mask) == NR_CPUS) {
ret = -EINVAL;
goto out;
}
task_rq_unlock(rq, &flags);
wake_up_process(rq->migration_thread);
wait_for_completion(&req.done);
- tlb_migrate_finish(p->mm);
return 0;
}
out:
}
if (rq->active_balance) {
+#ifndef CONFIG_CKRM_CPU_SCHEDULE
active_load_balance(rq, cpu);
+#endif
rq->active_balance = 0;
}
if (dest_cpu == NR_CPUS)
dest_cpu = any_online_cpu(tsk->cpus_allowed);
if (dest_cpu == NR_CPUS) {
- cpus_setall(tsk->cpus_allowed);
+ cpus_clear(tsk->cpus_allowed);
+ cpus_complement(tsk->cpus_allowed);
dest_cpu = any_online_cpu(tsk->cpus_allowed);
/* Don't tell them about moving exiting tasks
p = kthread_create(migration_thread, hcpu, "migration/%d",cpu);
if (IS_ERR(p))
return NOTIFY_BAD;
- p->flags |= PF_NOFREEZE;
kthread_bind(p, cpu);
/* Must be high prio: stop_machine expects to yield to it. */
rq = task_rq_lock(p, &flags);
sd = rq->sd;
- printk(KERN_DEBUG "CPU%d: %s\n",
+ printk(KERN_WARNING "CPU%d: %s\n",
i, (cpu_online(i) ? " online" : "offline"));
do {
int j;
char str[NR_CPUS];
struct sched_group *group = sd->groups;
- cpumask_t groupmask;
+ cpumask_t groupmask, tmp;
cpumask_scnprintf(str, NR_CPUS, sd->span);
cpus_clear(groupmask);
printk("domain %d: span %s\n", level, str);
if (!cpu_isset(i, sd->span))
- printk(KERN_DEBUG "ERROR domain->span does not contain CPU%d\n", i);
+ printk(KERN_WARNING "ERROR domain->span does not contain CPU%d\n", i);
if (!cpu_isset(i, group->cpumask))
- printk(KERN_DEBUG "ERROR domain->groups does not contain CPU%d\n", i);
+ printk(KERN_WARNING "ERROR domain->groups does not contain CPU%d\n", i);
if (!group->cpu_power)
- printk(KERN_DEBUG "ERROR domain->cpu_power not set\n");
+ printk(KERN_WARNING "ERROR domain->cpu_power not set\n");
- printk(KERN_DEBUG);
+ printk(KERN_WARNING);
for (j = 0; j < level + 2; j++)
printk(" ");
printk("groups:");
if (!cpus_weight(group->cpumask))
printk(" ERROR empty group:");
- if (cpus_intersects(groupmask, group->cpumask))
+ cpus_and(tmp, groupmask, group->cpumask);
+ if (cpus_weight(tmp) > 0)
printk(" ERROR repeated CPUs:");
cpus_or(groupmask, groupmask, group->cpumask);
sd = sd->parent;
if (sd) {
- if (!cpus_subset(groupmask, sd->span))
- printk(KERN_DEBUG "ERROR parent span is not a superset of domain->span\n");
+ cpus_and(tmp, groupmask, sd->span);
+ if (!cpus_equal(tmp, groupmask))
+ printk(KERN_WARNING "ERROR parent span is not a superset of domain->span\n");
}
} while (sd);
void __init sched_init(void)
{
runqueue_t *rq;
- int i, j, k;
+ int i;
+#ifndef CONFIG_CKRM_CPU_SCHEDULE
+ int j, k;
+#endif
#ifdef CONFIG_SMP
/* Set up an initial dummy domain for early boot */
static struct sched_domain sched_domain_init;
static struct sched_group sched_group_init;
+ cpumask_t cpu_mask_all = CPU_MASK_ALL;
memset(&sched_domain_init, 0, sizeof(struct sched_domain));
- sched_domain_init.span = CPU_MASK_ALL;
+ sched_domain_init.span = cpu_mask_all;
sched_domain_init.groups = &sched_group_init;
sched_domain_init.last_balance = jiffies;
sched_domain_init.balance_interval = INT_MAX; /* Don't balance */
- sched_domain_init.busy_factor = 1;
memset(&sched_group_init, 0, sizeof(struct sched_group));
- sched_group_init.cpumask = CPU_MASK_ALL;
+ sched_group_init.cpumask = cpu_mask_all;
sched_group_init.next = &sched_group_init;
sched_group_init.cpu_power = SCHED_LOAD_SCALE;
#endif
+ init_cpu_classes();
+
for (i = 0; i < NR_CPUS; i++) {
+#ifndef CONFIG_CKRM_CPU_SCHEDULE
prio_array_t *array;
-
+#endif
rq = cpu_rq(i);
spin_lock_init(&rq->lock);
+
+#ifndef CONFIG_CKRM_CPU_SCHEDULE
rq->active = rq->arrays;
rq->expired = rq->arrays + 1;
+#else
+ rq->ckrm_cpu_load = 0;
+#endif
rq->best_expired_prio = MAX_PRIO;
#ifdef CONFIG_SMP
rq->migration_thread = NULL;
INIT_LIST_HEAD(&rq->migration_queue);
#endif
+ INIT_LIST_HEAD(&rq->hold_queue);
atomic_set(&rq->nr_iowait, 0);
+#ifndef CONFIG_CKRM_CPU_SCHEDULE
for (j = 0; j < 2; j++) {
array = rq->arrays + j;
for (k = 0; k < MAX_PRIO; k++) {
// delimiter for bitsearch
__set_bit(MAX_PRIO, array->bitmap);
}
+#endif
}
+
/*
* We have to do a little magic to get the first
* thread right in SMP mode.
rq->curr = current;
rq->idle = current;
set_task_cpu(current, smp_processor_id());
+#ifdef CONFIG_CKRM_CPU_SCHEDULE
+ current->cpu_class = default_cpu_class;
+ current->array = NULL;
+#endif
wake_up_forked_process(current);
/*
EXPORT_SYMBOL(__preempt_write_lock);
#endif /* defined(CONFIG_SMP) && defined(CONFIG_PREEMPT) */
+
+#ifdef CONFIG_DELAY_ACCT
+int task_running_sys(struct task_struct *p)
+{
+ return task_running(task_rq(p),p);
+}
+EXPORT_SYMBOL(task_running_sys);
+#endif
+
+#ifdef CONFIG_CKRM_CPU_SCHEDULE
+/**
+ * return the classqueue object of a certain processor
+ * Note: not supposed to be used in performance sensitive functions
+ */
+struct classqueue_struct * get_cpu_classqueue(int cpu)
+{
+ return (& (cpu_rq(cpu)->classqueue) );
+}
+#endif
git://git.onelab.eu / linux-2.6.git / blobdiff