void
schedule(void) {
bool intr_flag;
struct proc_struct *next;
local_intr_save(intr_flag);
{
cprintf("\n++++++ CURRENT PID = %d ++++++\n", current->pid);
cprintf("++++++ IN SCHEDULE() ++++++\n");
current->need_resched = 0;
if (current->state == PROC_RUNNABLE) {
cprintf("++++++ CURRENT PID = %d RUNNABLE, CALL ENQUEUE ++++++\n", current->pid);
sched_class_enqueue(current);
}
if ((next = sched_class_pick_next()) != NULL) {
cprintf("++++++ NEXT PID = %d TO RUN, CALL DEQUEUE ++++++\n", next->pid);
sched_class_dequeue(next);
}
if (next == NULL) {
next = idleproc;
}
next->runs ++;
if (next != current) {
proc_run(next);
}
}
local_intr_restore(intr_flag);
}
void
schedule(void) {
bool intr_flag;
struct proc_struct *next;
local_intr_save(intr_flag);
{
current->need_resched = 0;
if (current->state == PROC_RUNNABLE) {
cprintf("Timer finished for process pid = %d and push in the queue\n",current->pid);
sched_class_enqueue(current);
}
if ((next = sched_class_pick_next()) != NULL) {
cprintf("Picks process pid = %d to run and pop from the queue\n",next->pid);
sched_class_dequeue(next);
}
if (next == NULL) {
cprintf("No runnable process.\n");
next = idleproc;
}
next->runs ++;
if (next != current) {
proc_run(next);
}
}
local_intr_restore(intr_flag);
}
void schedule(void)
{
bool intr_flag;
struct proc_struct *next;
local_intr_save(intr_flag);
{
current->need_resched = 0;
if (current->state == PROC_RUNNABLE)
{
sched_class_enqueue(current);
}
if ((next = sched_class_pick_next()) != NULL)
{
sched_class_dequeue(next);
}
if (next == NULL)
{
next = idleproc;
}
next->runs++;
if (next != current)
{
proc_run(next);
}
}
local_intr_restore(intr_flag);
}
void
schedule(void) { // 这个用来分配进程的运行
cprintf("\n==> schedule\n");
bool intr_flag;
struct proc_struct *next;
local_intr_save(intr_flag);
{
current->need_resched = 0;
if (current->state == PROC_RUNNABLE) { // 标记为可以运行
sched_class_enqueue(current); // 将当前进程放入就绪队列
}
if ((next = sched_class_pick_next()) != NULL) { // 选出优先级最高的一个进程
sched_class_dequeue(next);
}
if (next == NULL) {
next = idleproc; // 如果没有找到就绪的进程，那么继续运行自己
}
next->runs ++;
if (next != current) {
proc_run(next); // 开始运行
}
}
local_intr_restore(intr_flag);
}
void
schedule(void) {
/* schedule in irq ctx is not allowed */
assert(!ucore_in_interrupt());
bool intr_flag;
struct proc_struct *next;
#ifndef MT_SUPPORT
list_entry_t head;
int lapic_id = pls_read(lapic_id);
#endif
local_intr_save(intr_flag);
int lcpu_count = pls_read(lcpu_count);
{
current->need_resched = 0;
#ifndef MT_SUPPORT
if (current->mm)
{
assert(current->mm->lapic == lapic_id);
current->mm->lapic = -1;
}
#endif
if (current->state == PROC_RUNNABLE && current->pid >= lcpu_count) {
sched_class_enqueue(current);
}
#ifndef MT_SUPPORT
list_init(&head);
while (1)
{
next = sched_class_pick_next();
if (next != NULL) sched_class_dequeue(next);
if (next && next->mm && next->mm->lapic != -1)
{
list_add(&head, &(next->run_link));
}
else
{
list_entry_t *cur;
while ((cur = list_next(&head)) != &head)
{
list_del_init(cur);
sched_class_enqueue(le2proc(cur, run_link));
}
break;
}
}
#else
next = sched_class_pick_next();
if (next != NULL)
sched_class_dequeue(next);
#endif /* !MT_SUPPORT */
if (next == NULL) {
next = idleproc;
}
next->runs ++;
/* Collect information here*/
if (sched_collect_info) {
int lcpu_count = pls_read(lcpu_count);
int lcpu_idx = pls_read(lcpu_idx);
int loc = sched_info_head[lcpu_idx];
int prev = sched_info_pid[loc*lcpu_count + lcpu_idx];
if (next->pid == prev)
sched_info_times[loc*lcpu_count + lcpu_idx] ++;
else {
sched_info_head[lcpu_idx] ++;
if (sched_info_head[lcpu_idx] >= PGSIZE / sizeof(uint16_t) / lcpu_count)
sched_info_head[lcpu_idx] = 0;
loc = sched_info_head[lcpu_idx];
uint16_t prev_pid = sched_info_pid[loc*lcpu_count + lcpu_idx];
uint16_t prev_times = sched_info_times[loc*lcpu_count + lcpu_idx];
if (prev_times > 0 && prev_pid >= lcpu_count + 2)
sched_slices[lcpu_idx][prev_pid % SLICEPOOL_SIZE] += prev_times;
sched_info_pid[loc*lcpu_count + lcpu_idx] = next->pid;
sched_info_times[loc*lcpu_count + lcpu_idx] = 1;
}
}
#ifndef MT_SUPPORT
assert(!next->mm || next->mm->lapic == -1);
if (next->mm)
next->mm->lapic = lapic_id;
#endif
if (next != current) {
#if 0
kprintf("N %d to %d\n", current->pid, next->pid);
#endif
proc_run(next);
}
}
local_intr_restore(intr_flag);
}
