Imperial-MEng/pintos_22
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Add implementation for recalculate effective priority, w/ T

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This commit is contained in:
sBubshait
2024-10-20 20:37:03 +01:00
parent 8e20884a23
commit b1dba1a0bd
1 changed files with 13 additions and 10 deletions
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23
src/threads/thread.c
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@@ -389,14 +389,8 @@ thread_set_priority (int new_base_priority)
t->base_priority = new_base_priority; t->base_priority = new_base_priority;
t->priority = new_base_priority; t->priority = new_base_priority;
if (!list_empty (&t->donors_list) && new_base_priority < old_priority) { if (new_base_priority < old_priority)
int max_donated_priority = thread_recalculate_priority ();
list_entry (list_max (&t->donors_list, priority_more, NULL),
struct thread, donor_elem)->priority;
if(new_base_priority < max_donated_priority)
t->priority = new_base_priority;
}
thread_yield (); thread_yield ();
} }
@@ -412,8 +406,17 @@ thread_get_priority (void)
void void
thread_recalculate_priority (void) thread_recalculate_priority (void)
{ {
barrier (); struct thread *t = thread_current ();
};
if (!list_empty (&t->donors_list)) {
int max_donated_priority =
list_entry (list_max (&t->donors_list, priority_more, NULL),
struct thread, donor_elem)->priority;
if(max_donated_priority > t->priority)
t->priority = max_donated_priority;
}
}
/* Sets the current thread's nice value to NICE. */ /* Sets the current thread's nice value to NICE. */
void void