1 /* 2 * Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 import utils.*; 25 26 /* 27 * @test 28 * @summary Test checks the consistency of the output 29 * displayed with jstat -gccapacity. 30 * @modules java.base/jdk.internal.misc 31 * @library /test/lib/share/classes 32 * @library ../share 33 * @requires vm.opt.ExplicitGCInvokesConcurrent != true 34 * @build common.* 35 * @build utils.* 36 * @ignore 8149778 37 * @run main/othervm -XX:+UsePerfData -Xmx128M GcCapacityTest 38 */ 39 public class GcCapacityTest { 40 41 public static void main(String[] args) throws Exception { 42 43 // We will be running "jstat -gc" tool 44 JstatGcCapacityTool jstatGcTool = new JstatGcCapacityTool(ProcessHandle.current().getPid()); 45 46 // Run once and get the results asserting that they are reasonable 47 JstatGcCapacityResults measurement1 = jstatGcTool.measure(); 48 measurement1.assertConsistency(); 49 50 // Provoke a gc and verify the changed values 51 GcProvoker gcProvoker = GcProvoker.createGcProvoker(); 52 gcProvoker.provokeGc(); 53 JstatGcCapacityResults measurement2 = jstatGcTool.measure(); 54 measurement2.assertConsistency(); 55 56 // Assert that the GC events count has increased 57 JstatResults.assertGCEventsIncreased(measurement1, measurement2); 58 59 // Provoke a gc again and verify the changed values 60 gcProvoker.provokeGc(); 61 JstatGcCapacityResults measurement3 = jstatGcTool.measure(); 62 measurement3.assertConsistency(); 63 64 // Assert that the GC events count has increased 65 JstatResults.assertGCEventsIncreased(measurement1, measurement2); 66 } 67 68 }