--- jsr166/src/test/tck/JSR166TestCase.java	2017/03/14 00:54:27	1.221
+++ jsr166/src/test/tck/JSR166TestCase.java	2017/05/13 19:13:09	1.223
@@ -658,12 +658,17 @@ public class JSR166TestCase extends Test
         LONG_DELAY_MS   = SHORT_DELAY_MS * 200;
     }
 
+    private static final long TIMEOUT_DELAY_MS
+        = (long) (12.0 * Math.cbrt(delayFactor));
+
     /**
-     * Returns a timeout in milliseconds to be used in tests that
-     * verify that operations block or time out.
+     * Returns a timeout in milliseconds to be used in tests that verify
+     * that operations block or time out.  We want this to be longer
+     * than the OS scheduling quantum, but not too long, so don't scale
+     * linearly with delayFactor; we use "crazy" cube root instead.
      */
-    long timeoutMillis() {
-        return SHORT_DELAY_MS / 4;
+    static long timeoutMillis() {
+        return TIMEOUT_DELAY_MS;
     }
 
     /**
@@ -1138,6 +1143,12 @@ public class JSR166TestCase extends Test
     }
 
     /**
+     * The maximum number of consecutive spurious wakeups we should
+     * tolerate (from APIs like LockSupport.park) before failing a test.
+     */
+    static final int MAX_SPURIOUS_WAKEUPS = 10;
+
+    /**
      * The number of elements to place in collections, arrays, etc.
      */
     public static final int SIZE = 20;