8335684: Test ThreadCpuTime.java should pause like ThreadCpuTimeArray.java

Reviewed-by: sspitsyn, cjplummer

Author: kevinjwalls

test/jdk/java/lang/management/ThreadMXBean/ThreadCpuTime.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2003, 2015, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2003, 2024, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -177,6 +177,8 @@ private static void waitUntilThreadBlocked()
                 }
             }
         }
+        // Account for threads using CPU for a few millis after their WAITING state is visible:
+        goSleep(500);
     }
 
     static class MyThread extends Thread {
@@ -228,15 +230,6 @@ public void run() {
                     " CurrentThreadCpuTime = " + time1 +
                     " > ThreadCpuTime = " + time2);
             }
-/*************
- * FIXME: Seems that on Solaris-sparc,
- * It occasionally returns a different current thread user time > thread user time
-            if (utime1 > utime2) {
-                throw new RuntimeException("TEST FAILED: " + getName() +
-                    " CurrentThreadUserTime = " + utime1 +
-                    " > ThreadUserTime = " + utime2);
-            }
-*/
         }
     }