1 /* 2 * Copyright (c) 2013, 2018, 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. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package jdk.jfr.event.os; 27 28 import java.util.List; 29 30 import jdk.jfr.Recording; 31 import jdk.jfr.consumer.RecordedEvent; 32 import jdk.test.lib.jfr.EventNames; 33 import jdk.test.lib.jfr.Events; 34 35 36 /** 37 * @test 38 * @key jfr 39 * @requires vm.hasJFR 40 * @library /test/lib 41 * @run main/othervm jdk.jfr.event.os.TestCPULoad 42 */ 43 public class TestCPULoad { 44 private final static String EVENT_NAME = EventNames.CPULoad; 45 46 public static void main(String[] args) throws Throwable { 47 Recording recording = new Recording(); 48 recording.enable(EVENT_NAME); 49 recording.start(); 50 // Need to sleep so a time delta can be calculated 51 Thread.sleep(100); 52 recording.stop(); 53 54 List<RecordedEvent> events = Events.fromRecording(recording); 55 if (events.isEmpty()) { 56 // CPU Load events are unreliable on Windows because 57 // the way processes are identified with perf. counters. 58 // See BUG 8010378. 59 // Workaround is to detect Windows and allow 60 // test to pass if events are missing. 61 if (isWindows()) { 62 return; 63 } 64 throw new AssertionError("Expected at least one event"); 65 } 66 for (RecordedEvent event : events) { 67 System.out.println("Event: " + event); 68 for (String loadName : loadNames) { 69 Events.assertField(event, loadName).atLeast(0.0f).atMost(1.0f); 70 } 71 } 72 } 73 74 private static final String[] loadNames = {"jvmUser", "jvmSystem", "machineTotal"}; 75 76 private static boolean isWindows() { 77 return System.getProperty("os.name").startsWith("Windows"); 78 } 79 }