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update timer after updating the timer list

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- revise code, increase the readability
This commit is contained in:
Stefan Lankes 2018-04-29 23:50:02 +02:00
parent c745503102
commit 807c210111
2 changed files with 22 additions and 16 deletions
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17
arch/x86_64/kernel/timer.c
View file

@ -55,7 +55,7 @@ void check_ticks(void)
if (!cpu_freq)
return;
const uint64_t curr_rdtsc = has_rdtscp() ? rdtscp(NULL) : rdtsc();
const uint64_t curr_rdtsc = rdtsc();
rmb();
const uint64_t diff_cycles = curr_rdtsc - per_core(last_rdtsc);
@ -65,7 +65,7 @@ void check_ticks(void)
if (diff_ticks > 0) {
set_per_core(timer_ticks, per_core(timer_ticks) + diff_ticks);
set_per_core(last_rdtsc, curr_rdtsc);
rmb();
mb();
}
}
#endif
@ -99,8 +99,11 @@ static void timer_handler(struct state *s)
int timer_wait(unsigned int ticks)
{
uint64_t eticks = per_core(timer_ticks) + ticks;
#ifdef DYNAMIC_TICKS
check_ticks();
#endif
uint64_t eticks = per_core(timer_ticks) + ticks;
task_t* curr_task = per_core(current_task);
if (curr_task->status == TASK_IDLE)
@ -119,12 +122,8 @@ int timer_wait(unsigned int ticks)
PAUSE;
}
} else if (per_core(timer_ticks) < eticks) {
check_workqueues();
if (per_core(timer_ticks) < eticks) {
set_timer(eticks);
reschedule();
}
set_timer(eticks);
reschedule();
}
return 0;

21
kernel/tasks.c
View file

@ -74,7 +74,7 @@ DEFINE_PER_CORE(uint32_t, __core_id, 0);
static void update_timer(task_t* first)
{
if(first) {
if (first) {
if(first->timeout > get_clock_tick()) {
timer_deadline((uint32_t) (first->timeout - get_clock_tick()));
} else {
@ -120,9 +120,9 @@ static void timer_queue_push(uint32_t core_id, task_t* task)
timer_queue->first = timer_queue->last = task;
task->next = task->prev = NULL;
#ifdef DYNAMIC_TICKS
update_timer(task);
#endif
#ifdef DYNAMIC_TICKS
update_timer(task);
#endif
} else {
// lookup position where to insert task
task_t* tmp = first;
@ -148,9 +148,9 @@ static void timer_queue_push(uint32_t core_id, task_t* task)
if(timer_queue->first == tmp) {
timer_queue->first = task;
#ifdef DYNAMIC_TICKS
update_timer(task);
#endif
#ifdef DYNAMIC_TICKS
update_timer(task);
#endif
}
}
}
@ -793,6 +793,13 @@ void check_timers(void)
wakeup_task(task->id);
}
#ifdef DYNAMIC_TICKS
task = readyqueue->timers.first;
if (task) {
update_timer(task);
}
#endif
spinlock_irqsave_unlock(&readyqueue->lock);
}