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implement recent_cpu calculations on every second

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This commit is contained in:
EDiasAlberto
2024-10-16 18:45:28 +01:00
parent 7a1aa21e1e
commit 4a5de13d1e
2 changed files with 11 additions and 3 deletions
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4
src/devices/timer.c
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@@ -199,6 +199,10 @@ static void
timer_interrupt (struct intr_frame *args UNUSED)
{
ticks++;
if (ticks % TIMER_FREQ == 0)
{
calculate_recent_cpu ();
}
for (struct list_elem *e = list_begin (&sleeping_threads);
e != list_end (&sleeping_threads); e = list_next (e))
{

10
src/threads/thread.c
View File

@@ -375,11 +375,15 @@ calculate_priority (void)
return 0;
}
fp32_t
void
calculate_recent_cpu (void)
{
/* Not yet implemented */
return { 0 };
struct thread *t = thread_current ();
fp32_t curr_recent_cpu = t->recent_cpu;
fp32_t curr_load_avg = fp_mul_int(thread_get_load_avg (), 2);
fp32_t recent_cpu_coeff = fp_div(curr_load_avg, fp_add_int(curr_load_avg, 1));
fp32_t new_recent_cpu = fp_add_int(fp_mul(recent_cpu_coeff, curr_recent_cpu), thread_get_nice ());
t->recent_cpu = new_recent_cpu;
}
void