Make tests public. Rewrite most tests. Add tests.

[pintos-anon] / src / tests / threads / mlfqs-recent-1.c

diff --git a/src/tests/threads/mlfqs-recent-1.c b/src/tests/threads/mlfqs-recent-1.c
new file mode 100644 (file)
index 0000000..727bcb1
--- /dev/null
+++ b/src/tests/threads/mlfqs-recent-1.c
@@ -0,0 +1,43 @@
+#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"
+
+/* Sensitive to assumption that recent_cpu updates happen exactly
+   when timer_ticks()%TIMER_FREQ == 0. */
+
+void
+test_mlfqs_recent_1 (void) 
+{
+  int64_t start_time;
+  int last_elapsed = 0;
+  
+  ASSERT (enable_mlfqs);
+
+  msg ("Sleeping 10 seconds to allow recent_cpu to decay, please wait...");
+  start_time = timer_ticks ();
+  timer_sleep (DIV_ROUND_UP (start_time, TIMER_FREQ) - start_time
+               + 10 * TIMER_FREQ);
+
+  start_time = timer_ticks ();
+  for (;;) 
+    {
+      int elapsed = timer_elapsed (start_time);
+      if (elapsed % (TIMER_FREQ * 2) == 0 && elapsed > last_elapsed) 
+        {
+          int recent_cpu = thread_get_recent_cpu ();
+          int load_avg = thread_get_load_avg ();
+          int elapsed_seconds = elapsed / TIMER_FREQ;
+          msg ("After %d seconds, recent_cpu is %d.%02d, load_avg is %d.%02d.",
+               elapsed_seconds,
+               recent_cpu / 100, recent_cpu % 100,
+               load_avg / 100, load_avg % 100);
+          if (elapsed_seconds >= 180)
+            break;
+        } 
+      last_elapsed = elapsed;
+    }
+}