hotspot/test/serviceability/tmtools/jstat/GcCauseTest03.java
changeset 35493 863fb33f9940
child 37434 303d15f45adf
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/test/serviceability/tmtools/jstat/GcCauseTest03.java	Thu Jan 14 15:35:21 2016 +0300
@@ -0,0 +1,61 @@
+/*
+ * 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 forces debuggee application call System.gc(), runs jstat and checks that
+ *          cause of last garbage collection displayed by jstat (LGCC) is 'System.gc()'.
+ * @library /test/lib/share/classes
+ * @library ../share
+ * @build common.*
+ * @build utils.*
+ *
+ * @run main/othervm  -XX:+UsePerfData -Xms128M -XX:MaxMetaspaceSize=128M GcCauseTest03
+ */
+import utils.*;
+
+public class GcCauseTest03 {
+
+    private final static float targetMemoryUsagePercent = 0.7f;
+
+    public static void main(String[] args) throws Exception {
+
+        // We will be running "jstat -gc" tool
+        JstatGcCauseTool jstatGcTool = new JstatGcCauseTool(ProcessHandle.current().getPid());
+
+        System.gc();
+
+        // Run once and get the  results asserting that they are reasonable
+        JstatGcCauseResults measurement = jstatGcTool.measure();
+        measurement.assertConsistency();
+
+        if (measurement.valueExists("LGCC")) {
+            if (!"System.gc()".equals(measurement.getStringValue("LGCC"))) {
+                throw new RuntimeException("Unexpected GC cause: " + measurement.getStringValue("LGCC") + ", expected System.gc()");
+            }
+        }
+
+    }
+}