65 lines
1.6 KiB
C
65 lines
1.6 KiB
C
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/* Checks that recent_cpu and priorities are updated for blocked
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threads.
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The main thread sleeps for 25 seconds, spins for 5 seconds,
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then releases a lock. The "block" thread spins for 20 seconds
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then attempts to acquire the lock, which will block for 10
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seconds (until the main thread releases it). If recent_cpu
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decays properly while the "block" thread sleeps, then the
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block thread should be immediately scheduled when the main
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thread releases the lock. */
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#include <stdio.h>
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#include "tests/threads/tests.h"
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#include "threads/init.h"
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#include "threads/malloc.h"
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#include "threads/synch.h"
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#include "threads/thread.h"
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#include "devices/timer.h"
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static void block_thread (void *lock_);
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void
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test_mlfqs_block (void)
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{
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int64_t start_time;
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struct lock lock;
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ASSERT (thread_mlfqs);
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msg ("Main thread acquiring lock.");
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lock_init (&lock);
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lock_acquire (&lock);
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msg ("Main thread creating block thread, sleeping 25 seconds...");
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thread_create ("block", PRI_DEFAULT, block_thread, &lock);
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timer_sleep (25 * TIMER_FREQ);
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msg ("Main thread spinning for 5 seconds...");
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start_time = timer_ticks ();
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while (timer_elapsed (start_time) < 5 * TIMER_FREQ)
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continue;
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msg ("Main thread releasing lock.");
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lock_release (&lock);
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msg ("Block thread should have already acquired lock.");
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}
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static void
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block_thread (void *lock_)
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{
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struct lock *lock = lock_;
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int64_t start_time;
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msg ("Block thread spinning for 20 seconds...");
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start_time = timer_ticks ();
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while (timer_elapsed (start_time) < 20 * TIMER_FREQ)
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continue;
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msg ("Block thread acquiring lock...");
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lock_acquire (lock);
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msg ("...got it.");
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}
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