/* Print statistics about Pintos execution. */
static void
print_stats (void)
{
timer_print_stats ();
thread_print_stats ();
#ifdef FILESYS
block_print_stats ();
#endif
console_print_stats ();
kbd_print_stats ();
exception_print_stats ();
}
/* Runs THREAD_CNT threads thread sleep ITERATIONS times each. */
static void
test_sleep (int thread_cnt, int iterations)
{
struct sleep_test test;
struct sleep_thread *threads;
int *output, *op;
int product;
int i;
/* This test does not work with the MLFQS. */
ASSERT (!thread_mlfqs);
msg ("Creating %d threads to sleep %d times each.", thread_cnt, iterations);
msg ("Thread 0 sleeps 10 ticks each time,");
msg ("thread 1 sleeps 20 ticks each time, and so on.");
msg ("If successful, product of iteration count and");
msg ("sleep duration will appear in nondescending order.");
/* Allocate memory. */
threads = malloc (sizeof *threads * thread_cnt);
output = malloc (sizeof *output * iterations * thread_cnt * 2);
if (threads == NULL || output == NULL)
PANIC ("couldn't allocate memory for test");
/* Initialize test. */
test.start = timer_ticks () + 100;
test.iterations = iterations;
lock_init (&test.output_lock);
test.output_pos = output;
/* Start threads. */
ASSERT (output != NULL);
for (i = 0; i < thread_cnt; i++)
{
struct sleep_thread *t = threads + i;
char name[16];
t->test = &test;
t->id = i;
t->duration = (i + 1) * 10;
t->iterations = 0;
snprintf (name, sizeof name, "thread %d", i);
thread_create (name, PRI_DEFAULT, sleeper, t);
}
/* Wait long enough for all the threads to finish. */
timer_sleep (100 + thread_cnt * iterations * 10 + 100);
/* Acquire the output lock in case some rogue thread is still
running. */
lock_acquire (&test.output_lock);
/* Print completion order. */
product = 0;
for (op = output; op < test.output_pos; op++)
{
struct sleep_thread *t;
int new_prod;
ASSERT (*op >= 0 && *op < thread_cnt);
t = threads + *op;
new_prod = ++t->iterations * t->duration;
msg ("thread %d: duration=%d, iteration=%d, product=%d",
t->id, t->duration, t->iterations, new_prod);
if (new_prod >= product)
product = new_prod;
else
fail ("thread %d woke up out of order (%d > %d)!",
t->id, product, new_prod);
}
/* Verify that we had the proper number of wakeups. */
for (i = 0; i < thread_cnt; i++)
if (threads[i].iterations != iterations)
fail ("thread %d woke up %d times instead of %d",
i, threads[i].iterations, iterations);
lock_release (&test.output_lock);
thread_print_stats();
free (output);
free (threads);
}