1 /*
   2  * Copyright (c) 2014, 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 /**
  25  * @test
  26  * @bug 8031320
  27  * @summary Verify that RTMRetryCount affects actual amount of retries.
  28  * @library /test/lib /
  29  * @modules java.base/jdk.internal.misc
  30  *          java.management
  31  * @requires vm.flavor == "server" & !vm.emulatedClient & vm.rtm.cpu & vm.rtm.os
  32  * @build sun.hotspot.WhiteBox
  33  * @run driver ClassFileInstaller sun.hotspot.WhiteBox
  34  *                                sun.hotspot.WhiteBox$WhiteBoxPermission
  35  * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
  36  *                   -XX:+WhiteBoxAPI
  37  *                   compiler.rtm.locking.TestRTMRetryCount
  38  */
  39 
  40 package compiler.rtm.locking;
  41 
  42 import compiler.testlibrary.rtm.BusyLock;
  43 import compiler.testlibrary.rtm.CompilableTest;
  44 import compiler.testlibrary.rtm.RTMLockingStatistics;
  45 import compiler.testlibrary.rtm.RTMTestBase;
  46 import jdk.test.lib.Asserts;
  47 import jdk.test.lib.process.OutputAnalyzer;
  48 import jdk.test.lib.cli.CommandLineOptionTest;
  49 
  50 import java.util.List;
  51 
  52 /**
  53  * Test verifies that RTMRetryCount option actually affects amount of
  54  * retries on lock busy.
  55  */
  56 public class TestRTMRetryCount {
  57     /**
  58      * Time in ms, during which busy lock will be locked.
  59      */
  60     private static final int LOCKING_TIME = 5000;
  61     private static final boolean INFLATE_MONITOR = true;
  62 
  63     protected void runTestCases() throws Throwable {
  64         verifyRTMRetryCount(0);
  65         verifyRTMRetryCount(1);
  66         verifyRTMRetryCount(5);
  67         verifyRTMRetryCount(10);
  68     }
  69 
  70     private void verifyRTMRetryCount(int retryCount) throws Throwable {
  71         CompilableTest busyLock = new BusyLock();
  72         long expectedAborts = retryCount + 1L;
  73 
  74         OutputAnalyzer outputAnalyzer = RTMTestBase.executeRTMTest(
  75                 busyLock,
  76                 "-XX:-UseRTMXendForLockBusy",
  77                 "-XX:RTMTotalCountIncrRate=1",
  78                 CommandLineOptionTest.prepareNumericFlag("RTMRetryCount",
  79                         retryCount),
  80                 "-XX:RTMTotalCountIncrRate=1",
  81                 "-XX:+PrintPreciseRTMLockingStatistics",
  82                 BusyLock.class.getName(),
  83                 Boolean.toString(TestRTMRetryCount.INFLATE_MONITOR),
  84                 Integer.toString(TestRTMRetryCount.LOCKING_TIME)
  85         );
  86 
  87         outputAnalyzer.shouldHaveExitValue(0);
  88 
  89         List<RTMLockingStatistics> statistics = RTMLockingStatistics.fromString(
  90                 busyLock.getMethodWithLockName(), outputAnalyzer.getStdout());
  91 
  92         Asserts.assertEQ(statistics.size(), 1, "VM output should contain "
  93                 + "exactly one rtm locking statistics entry for method "
  94                 + busyLock.getMethodWithLockName());
  95 
  96         Asserts.assertEQ(statistics.get(0).getTotalAborts(), expectedAborts,
  97                 String.format("It is expected to get %d aborts",
  98                         expectedAborts));
  99     }
 100 
 101     public static void main(String args[]) throws Throwable {
 102         new TestRTMRetryCount().runTestCases();
 103     }
 104 }