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remove repeated comparator and reorder thread_init operations

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This commit is contained in:
EDiasAlberto
2024-10-23 18:56:48 +01:00
parent c357126cc1
commit 1fb101c365
1 changed files with 9 additions and 32 deletions
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33
src/threads/thread.c
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@@ -73,8 +73,6 @@ static bool is_thread (struct thread *) UNUSED;
static void *alloc_frame (struct thread *, size_t size);
static int calculate_bsd_priority (fp32_t recent_cpu, int nice);
static void thread_update_recent_cpu (struct thread *t, void *aux UNUSED);
static bool thread_priority_less (const struct list_elem *a,
const struct list_elem *b, void *aux UNUSED);
static void schedule (void);
void thread_schedule_tail (struct thread *prev);
static tid_t allocate_tid (void);
@@ -164,7 +162,7 @@ thread_tick (void)
size_t ready = threads_ready ();
if (t != idle_thread)
ready++;
fp32_t old_coeff = fp_mul (fp_div_int (int_to_fp (59), 60), load_avg);
fp32_t old_coeff = fp_div_int (fp_mul_int(load_avg, 59), 60);
fp32_t new_coeff = fp_div_int (int_to_fp (ready), 60);
load_avg = fp_add (old_coeff, new_coeff);
@@ -293,9 +291,7 @@ thread_unblock (struct thread *t)
old_level = intr_disable ();
ASSERT (t->status == THREAD_BLOCKED);
if (thread_mlfqs)
list_insert_ordered (&ready_list, &t->elem, thread_priority_less, NULL);
else
/* Insert the thread back into the ready list in priority order. */
list_insert_ordered(&ready_list, &t->elem, priority_more, NULL);
@@ -371,16 +367,10 @@ thread_yield (void)
if (cur != idle_thread)
{
if (thread_mlfqs)
{
list_insert_ordered (&ready_list, &cur->elem, thread_priority_less,
NULL);
}
else
{
/* Insert the thread back into the ready list in priority order. */
list_insert_ordered(&ready_list, &cur->elem, priority_more, NULL);
}
}
cur->status = THREAD_READY;
@@ -643,8 +633,6 @@ init_thread (struct thread *t, const char *name, int nice, int priority,
strlcpy (t->name, name, sizeof t->name);
t->stack = (uint8_t *) t + PGSIZE;
t->priority
= thread_mlfqs ? calculate_bsd_priority (recent_cpu, nice) : priority;
t->nice = nice;
t->recent_cpu = recent_cpu;
@@ -653,7 +641,7 @@ init_thread (struct thread *t, const char *name, int nice, int priority,
t->magic = THREAD_MAGIC;
list_init (&t->donors_list);
t->priority = t->base_priority;
t->priority = thread_mlfqs ? calculate_bsd_priority (recent_cpu, nice) : t->base_priority;
t->waiting_lock = NULL;
old_level = intr_disable ();
@@ -746,17 +734,6 @@ calculate_bsd_priority (fp32_t recent_cpu, int nice)
return priority;
}
/* Returns true if thread a's priority is strictly greater than
thread b's priority. */
static bool
thread_priority_less (const struct list_elem *a, const struct list_elem *b,
void *aux UNUSED)
{
struct thread *ta = list_entry (a, struct thread, elem);
struct thread *tb = list_entry (b, struct thread, elem);
return ta->priority > tb->priority;
}
/* Schedules a new process. At entry, interrupts must be off and
the running process's state must have been changed from
running to some other state. This function finds another