hotspot/test/serviceability/tmtools/jstat/GcCauseTest01.java
changeset 35493 863fb33f9940
child 35535 82db90419728
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/test/serviceability/tmtools/jstat/GcCauseTest01.java	Thu Jan 14 15:35:21 2016 +0300
@@ -0,0 +1,72 @@
+/*
+ * Copyright (c) 2015, 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
+ * @summary Test checks output displayed with jstat -gccause.
+ *          Test scenario:
+ *          test several times provokes garbage collection in the debuggee application and after each garbage
+ *          collection runs jstat. jstat should show that after garbage collection number of GC events and garbage
+ *          collection time increase.
+ * @library /test/lib/share/classes
+ * @library ../share
+ * @build common.*
+ * @build utils.*
+ *
+ * @run main/othervm -XX:+UsePerfData GcCauseTest01
+ */
+import utils.*;
+
+public class GcCauseTest01 {
+
+    public static void main(String[] args) throws Exception {
+
+        // We will be running "jstat -gc" tool
+        JstatGcCauseTool jstatGcTool = new JstatGcCauseTool(ProcessHandle.current().getPid());
+
+        // Run once and get the  results asserting that they are reasonable
+        JstatGcCauseResults measurement1 = jstatGcTool.measure();
+        measurement1.assertConsistency();
+
+        GcProvoker gcProvoker = GcProvoker.createGcProvoker();
+
+        // Provoke GC then run the tool again and get the results  asserting that they are reasonable
+        gcProvoker.provokeGc();
+        JstatGcCauseResults measurement2 = jstatGcTool.measure();
+        measurement2.assertConsistency();
+
+        // Assert the increase in GC events and time between the measurements
+        JstatResults.assertGCEventsIncreased(measurement1, measurement2);
+        JstatResults.assertGCTimeIncreased(measurement1, measurement2);
+
+        // Provoke GC 3rd time then run the tool 3rd time twice and get the results
+        // asserting that they are reasonable
+        gcProvoker.provokeGc();
+        JstatGcCauseResults measurement3 = jstatGcTool.measure();
+        measurement3.assertConsistency();
+
+        // Assert the increase in GC events and time between the measurements
+        JstatResults.assertGCEventsIncreased(measurement2, measurement3);
+        JstatResults.assertGCTimeIncreased(measurement2, measurement3);
+    }
+}