--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/gc/6581734/Test6581734.java	Fri Jul 30 22:43:50 2010 +0100
@@ -0,0 +1,149 @@
+/*
+ * Copyright (c) 2010, 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
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test Test6581734.java
+ * @bug 6581734
+ * @summary CMS Old Gen's collection usage is zero after GC which is incorrect
+ * @run main/othervm -Xmx512m -verbose:gc -XX:+UseConcMarkSweepGC Test6581734
+ *
+ */
+import java.util.*;
+import java.lang.management.*;
+
+// 6581734 states that memory pool usage via the mbean is wrong
+// for CMS (zero, even after a collection).
+//
+// 6580448 states that the collection count similarly is wrong
+// (stays at zero for CMS collections)
+// -- closed as dup of 6581734 as the same fix resolves both.
+
+
+public class Test6581734 {
+
+    private String poolName = "CMS";
+    private String collectorName = "ConcurrentMarkSweep";
+
+    public static void main(String [] args) {
+
+        Test6581734 t = null;
+        if (args.length==2) {
+            t = new Test6581734(args[0], args[1]);
+        } else {
+            System.out.println("Defaulting to monitor CMS pool and collector.");
+            t = new Test6581734();
+        }
+        t.run();
+    }
+
+    public Test6581734(String pool, String collector) {
+        poolName = pool;
+        collectorName = collector;
+    }
+
+    public Test6581734() {
+    }
+
+    public void run() {
+        // Use some memory, enough that we expect collections should
+        // have happened.
+        // Must run with options to ensure no stop the world full GC,
+        // but e.g. at least one CMS cycle.
+        allocationWork(300*1024*1024);
+        System.out.println("Done allocationWork");
+
+        // Verify some non-zero results are stored.
+        List<MemoryPoolMXBean> pools = ManagementFactory.getMemoryPoolMXBeans();
+        int poolsFound = 0;
+        int poolsWithStats = 0;
+        for (int i=0; i<pools.size(); i++) {
+            MemoryPoolMXBean pool = pools.get(i);
+            String name = pool.getName();
+            System.out.println("found pool: " + name);
+
+            if (name.contains(poolName)) {
+                long usage = pool.getCollectionUsage().getUsed();
+                System.out.println(name + ": usage after GC = " + usage);
+                poolsFound++;
+                if (usage > 0) {
+                    poolsWithStats++;
+                }
+            }
+        }
+        if (poolsFound == 0) {
+            throw new RuntimeException("No matching memory pools found: test with -XX:+UseConcMarkSweepGC");
+        }
+
+        List<GarbageCollectorMXBean> collectors = ManagementFactory.getGarbageCollectorMXBeans();
+        int collectorsFound = 0;
+        int collectorsWithTime= 0;
+        for (int i=0; i<collectors.size(); i++) {
+            GarbageCollectorMXBean collector = collectors.get(i);
+            String name = collector.getName();
+            System.out.println("found collector: " + name);
+            if (name.contains(collectorName)) {
+                collectorsFound++;
+                System.out.println(name + ": collection count = "
+                                   + collector.getCollectionCount());
+                System.out.println(name + ": collection time  = "
+                                   + collector.getCollectionTime());
+                if (collector.getCollectionCount() <= 0) {
+                    throw new RuntimeException("collection count <= 0");
+                }
+                if (collector.getCollectionTime() > 0) {
+                    collectorsWithTime++;
+                }
+            }
+        }
+        // verify:
+        if (poolsWithStats < poolsFound) {
+            throw new RuntimeException("pools found with zero stats");
+        }
+
+        if (collectorsWithTime<collectorsFound) {
+            throw new RuntimeException("collectors found with zero time";
+        }
+        System.out.println("Test passed.");
+    }
+
+    public void allocationWork(long target) {
+
+        long sizeAllocated = 0;
+        List list = new LinkedList();
+        long delay = 50;
+        long count = 0;
+
+        while (sizeAllocated < target) {
+            int size = 1024*1024;
+            byte [] alloc = new byte[size];
+            if (count % 2 == 0) {
+                list.add(alloc);
+                sizeAllocated+=size;
+                System.out.print(".");
+            }
+            try { Thread.sleep(delay); } catch (InterruptedException ie) { }
+            count++;
+        }
+    }
+
+}