0N/A/*
2362N/A * Copyright (c) 2003, 2004, Oracle and/or its affiliates. All rights reserved.
0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
0N/A *
0N/A * This code is free software; you can redistribute it and/or modify it
0N/A * under the terms of the GNU General Public License version 2 only, as
0N/A * published by the Free Software Foundation.
0N/A *
0N/A * This code is distributed in the hope that it will be useful, but WITHOUT
0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
0N/A * version 2 for more details (a copy is included in the LICENSE file that
0N/A * accompanied this code).
0N/A *
0N/A * You should have received a copy of the GNU General Public License version
0N/A * 2 along with this work; if not, write to the Free Software Foundation,
0N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
0N/A *
2362N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
2362N/A * or visit www.oracle.com if you need additional information or have any
2362N/A * questions.
0N/A */
0N/A
0N/A/*
0N/A * @test
0N/A * @bug 4858522
0N/A * @summary Basic unit test of OperatingSystemMXBean.getProcessCpuTime()
0N/A * @author Steve Bohne
0N/A */
0N/A
0N/A/*
0N/A * This test is just a sanity check and does not check for the correct
0N/A * value. The correct value should be checked manually:
0N/A * Solaris/Linux:
0N/A * 1. In a shell, enter the command: "ps -ef"
0N/A * 2. The value (reported in seconds) is in the "TIME" column for the process
0N/A * Windows NT/XP/2000:
0N/A * 1. Hit Ctrl-Alt-Delete, select Task Manager, select Processes tab
0N/A * 2. The value (reported in seconds) is in the "CPU Time" column for the
180N/A * process. You may have to add this column via View menu-> Select
0N/A * Columns... item.
0N/A * Windows 98/ME:
0N/A * Not supported.
0N/A */
0N/A
0N/Aimport com.sun.management.OperatingSystemMXBean;
0N/Aimport java.lang.management.*;
0N/A
0N/Apublic class GetProcessCpuTime {
0N/A
0N/A private static OperatingSystemMXBean mbean =
0N/A (com.sun.management.OperatingSystemMXBean)
0N/A ManagementFactory.getOperatingSystemMXBean();
0N/A
0N/A
0N/A // Careful with these values.
0N/A private static final long MIN_TIME_FOR_PASS = 1;
0N/A private static final long MAX_TIME_FOR_PASS = Long.MAX_VALUE;
0N/A
0N/A // No max time.
0N/A
0N/A private static boolean trace = false;
0N/A
0N/A public static void main(String args[]) throws Exception {
0N/A if (args.length > 0 && args[0].equals("trace")) {
0N/A trace = true;
0N/A }
0N/A
0N/A // Consume cpu time
0N/A double sum=0;
0N/A for (int i=0; i <=2000000; i++) {
0N/A sum += i;
0N/A sum /= i;
0N/A }
0N/A
0N/A long ns = mbean.getProcessCpuTime();
0N/A if (ns == -1) {
0N/A System.out.println("getProcessCpuTime() is not supported");
0N/A return;
0N/A }
0N/A
0N/A if (trace) {
0N/A System.out.println("Process CPU time in ns: " + ns);
0N/A }
0N/A
0N/A if (ns < MIN_TIME_FOR_PASS || ns > MAX_TIME_FOR_PASS) {
0N/A throw new RuntimeException("Process CPU time " +
0N/A "illegal value: " + ns + " ns " +
0N/A "(MIN = " + MIN_TIME_FOR_PASS + "; " +
0N/A "MAX = " + MAX_TIME_FOR_PASS + ")");
0N/A }
0N/A
0N/A System.out.println("Test passed.");
0N/A }
0N/A}