--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/test/serviceability/tmtools/jstat/GarbageProducerTest.java	Fri Feb 03 15:45:57 2017 +0300
@@ -0,0 +1,89 @@
+/*
+ * Copyright (c) 2017, 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.
+ */
+
+import java.lang.management.ManagementFactory;
+import utils.GarbageProducer;
+import common.TmTool;
+import utils.JstatResults;
+
+/**
+ * Base class for jstat testing which uses GarbageProducer to allocate garbage.
+ */
+public class GarbageProducerTest {
+
+    // Iterations of measurement to get consistent value of counters and jstat.
+    private final static int ITERATIONS = 10;
+    private final static float TARGET_MEMORY_USAGE = 0.7f;
+    private final static float MEASUREMENT_TOLERANCE = 0.05f;
+    private final GarbageProducer garbageProducer;
+    private final TmTool<? extends JstatResults> jstatTool;
+
+    public GarbageProducerTest(TmTool<? extends JstatResults> tool) {
+        garbageProducer = new GarbageProducer(TARGET_MEMORY_USAGE);
+        // We will be running jstat tool
+        jstatTool = tool;
+    }
+
+    public void run() throws Exception {
+        // Run once and get the  results asserting that they are reasonable
+        JstatResults measurement1 = jstatTool.measure();
+        measurement1.assertConsistency();
+        // Eat metaspace and heap then run the tool again and get the results  asserting that they are reasonable
+        System.gc();
+        garbageProducer.allocateMetaspaceAndHeap();
+        // Collect garbage. Also update VM statistics
+        System.gc();
+        int i = 0;
+        long collectionCountBefore = getCollectionCount();
+        JstatResults measurement2 = jstatTool.measure();
+        do {
+            System.out.println("Measurement #" + i);
+            long currentCounter = getCollectionCount();
+            // Check if GC cycle occured during measurement
+            if (currentCounter == collectionCountBefore) {
+                measurement2.assertConsistency();
+                checkOldGenMeasurement(measurement2);
+                return;
+            } else {
+                System.out.println("GC happened during measurement.");
+            }
+            collectionCountBefore = getCollectionCount();
+            measurement2 = jstatTool.measure();
+
+        } while (i++ < ITERATIONS);
+        // Checking will be performed without consistency guarantee.
+        checkOldGenMeasurement(measurement2);
+    }
+
+    private void checkOldGenMeasurement(JstatResults measurement2) {
+        float oldGenAllocationRatio = garbageProducer.getOldGenAllocationRatio() - MEASUREMENT_TOLERANCE;
+        // Assert that space has been utilized accordingly
+        JstatResults.assertSpaceUtilization(measurement2, TARGET_MEMORY_USAGE, oldGenAllocationRatio);
+    }
+
+    private static long getCollectionCount() {
+        return ManagementFactory.getGarbageCollectorMXBeans().stream()
+                .mapToLong(b -> b.getCollectionCount())
+                .sum();
+    }
+}