Make tests public. Rewrite most tests. Add tests.

[pintos-anon] / src / tests / threads / mlfqs-load-avg.c

diff --git a/src/tests/threads/mlfqs-load-avg.c b/src/tests/threads/mlfqs-load-avg.c
new file mode 100644 (file)
index 0000000..32238c9
--- /dev/null
+++ b/src/tests/threads/mlfqs-load-avg.c
@@ -0,0 +1,57 @@
+#include <stdio.h>
+#include "tests/threads/tests.h"
+#include "threads/init.h"
+#include "threads/malloc.h"
+#include "threads/synch.h"
+#include "threads/thread.h"
+#include "devices/timer.h"
+
+static int64_t start_time;
+
+static void load_thread (void *seq_no);
+
+#define THREAD_CNT 60
+
+void
+test_mlfqs_load_avg (void) 
+{
+  int i;
+  
+  ASSERT (enable_mlfqs);
+
+  start_time = timer_ticks ();
+  msg ("Starting %d load threads...", THREAD_CNT);
+  for (i = 0; i < THREAD_CNT; i++) 
+    {
+      char name[16];
+      snprintf(name, sizeof name, "load %d", i);
+      thread_create (name, PRI_DEFAULT, load_thread, (void *) i);
+    }
+  msg ("Starting threads took %d seconds.",
+       timer_elapsed (start_time) / TIMER_FREQ);
+  thread_set_nice (-20);
+
+  for (i = 0; i < 90; i++) 
+    {
+      int64_t sleep_until = start_time + TIMER_FREQ * (2 * i + 10);
+      int load_avg;
+      timer_sleep (sleep_until - timer_ticks ());
+      load_avg = thread_get_load_avg ();
+      msg ("After %d seconds, load average=%d.%02d.",
+           i * 2, load_avg / 100, load_avg % 100);
+    }
+}
+
+static void
+load_thread (void *seq_no_) 
+{
+  int seq_no = (int) seq_no_;
+  int sleep_time = TIMER_FREQ * (10 + seq_no);
+  int spin_time = sleep_time + TIMER_FREQ * THREAD_CNT;
+  int exit_time = TIMER_FREQ * (THREAD_CNT * 2);
+
+  timer_sleep (sleep_time - timer_elapsed (start_time));
+  while (timer_elapsed (start_time) < spin_time)
+    continue;
+  timer_sleep (exit_time - timer_elapsed (start_time));
+}