| /* |
| * Copyright (c) 2007, 2018, 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 converted from VM Testbase nsk/monitoring/RuntimeMXBean/RuntimeMXBean001. |
| * VM Testbase keywords: [quick, monitoring] |
| * |
| * @library /vmTestbase |
| * /test/lib |
| * @run driver jdk.test.lib.FileInstaller . . |
| * @run main/othervm |
| * nsk.monitoring.RuntimeMXBean.RuntimeMXBean001.RuntimeMXBean001 |
| * -testMode=directly |
| */ |
| |
| package nsk.monitoring.RuntimeMXBean.RuntimeMXBean001; |
| |
| import nsk.share.*; |
| import nsk.share.test.*; |
| import nsk.monitoring.share.*; |
| import java.lang.management.*; |
| |
| /** |
| * Test functions of RuntimeMXBean. |
| * |
| * |
| * Checks that values returned by getStartTime() and getUptime() |
| * measure actual uptime well enough, i.e. |
| * - start time does not change with time |
| * - start time + uptime is approximately current time |
| */ |
| public class RuntimeMXBean001 extends MonitoringTestBase implements Initializable { |
| private static final long NANO_MS = 1000000; |
| |
| private RuntimeMXBean runtime; |
| private int iterations = 10; |
| private long maxDiff = 5000; |
| private int fail_count = 0; |
| |
| public void initialize() { |
| runtime = monitoringFactory.getRuntimeMXBean(); |
| } |
| |
| private static final long getMillis() { |
| return System.nanoTime() / NANO_MS; |
| } |
| |
| private void checkTimes(long startTime, long upTime, String msg) { |
| if (startTime <= 0) |
| throw new TestFailure("Invalid start time: " + startTime); |
| if (upTime <= 0) |
| throw new TestFailure("Invalid uptime: " + upTime); |
| } |
| |
| private void testUptimeOne(long sleepTime) { |
| long startTime1 = runtime.getStartTime(); |
| long uptime1 = runtime.getUptime(); |
| long time1 = getMillis(); |
| log.info("startTime: " + startTime1 + ", uptime1: " + uptime1 + ", time1: " + time1); |
| checkTimes(startTime1, uptime1, "Before sleep"); |
| try { |
| Thread.sleep(sleepTime); |
| } catch (InterruptedException e) { |
| throw new TestFailure("Sleep was interrupted", e); |
| } |
| long startTime2 = runtime.getStartTime(); |
| long uptime2 = runtime.getUptime(); |
| long time2 = getMillis(); |
| checkTimes(startTime2, uptime2, "After sleep"); |
| |
| if (startTime1 != startTime2) |
| throw new TestFailure("Start time before sleep: " + startTime1 + " start time after sleep: " + startTime2); |
| if (uptime2 < uptime1) |
| throw new TestFailure("Uptime before sleep: " + uptime1 + " uptime after sleep: " + uptime2); |
| |
| long utDiff = (uptime2 - uptime1); |
| long tDiff = (time2 - time1); |
| long flowDiff = Math.abs(utDiff -tDiff); |
| if (flowDiff > maxDiff) { |
| throw new TestFailure("Difference between timeflow of uptime and current time is too big: " + flowDiff + ", expecting at most " + maxDiff); |
| } |
| } |
| |
| private void testUptime() { |
| for (int i = 0; i < iterations; ++i) { |
| log.info("Iteration: " + i); |
| testUptimeOne(LocalRandom.randomPauseTime()); |
| } |
| } |
| |
| public void run() { |
| testUptime(); |
| } |
| |
| public static void main(String[] args) { |
| Monitoring.runTest(new RuntimeMXBean001(), args); |
| } |
| } |