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 /**
  26  * @test
  27  * @bug 8031320
  28  * @summary Verify that RTMRetryCount affects actual amount of retries.
  29  * @library /test/lib /
  30  * @modules java.base/jdk.internal.misc
  31  *          java.management
  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 compiler.testlibrary.rtm.predicate.SupportedCPU;
  47 import compiler.testlibrary.rtm.predicate.SupportedVM;
  48 import jdk.test.lib.Asserts;
  49 import jdk.test.lib.process.OutputAnalyzer;
  50 import jdk.test.lib.cli.CommandLineOptionTest;
  51 import jdk.test.lib.cli.predicate.AndPredicate;
  52 
  53 import java.util.List;
  54 
  55 /**
  56  * Test verifies that RTMRetryCount option actually affects amount of
  57  * retries on lock busy.
  58  */
  59 public class TestRTMRetryCount extends CommandLineOptionTest {
  60     /**
  61      * Time in ms, during which busy lock will be locked.
  62      */
  63     private static final int LOCKING_TIME = 5000;
  64     private static final boolean INFLATE_MONITOR = true;
  65 
  66     private TestRTMRetryCount() {
  67         super(new AndPredicate(new SupportedCPU(), new SupportedVM()));
  68     }
  69 
  70     @Override
  71     protected void runTestCases() throws Throwable {
  72         verifyRTMRetryCount(0);
  73         verifyRTMRetryCount(1);
  74         verifyRTMRetryCount(5);
  75         verifyRTMRetryCount(10);
  76     }
  77 
  78     private void verifyRTMRetryCount(int retryCount) throws Throwable {
  79         CompilableTest busyLock = new BusyLock();
  80         long expectedAborts = retryCount + 1L;
  81 
  82         OutputAnalyzer outputAnalyzer = RTMTestBase.executeRTMTest(
  83                 busyLock,
  84                 "-XX:-UseRTMXendForLockBusy",
  85                 "-XX:RTMTotalCountIncrRate=1",
  86                 CommandLineOptionTest.prepareNumericFlag("RTMRetryCount",
  87                         retryCount),
  88                 "-XX:RTMTotalCountIncrRate=1",
  89                 "-XX:+PrintPreciseRTMLockingStatistics",
  90                 BusyLock.class.getName(),
  91                 Boolean.toString(TestRTMRetryCount.INFLATE_MONITOR),
  92                 Integer.toString(TestRTMRetryCount.LOCKING_TIME)
  93         );
  94 
  95         outputAnalyzer.shouldHaveExitValue(0);
  96 
  97         List<RTMLockingStatistics> statistics = RTMLockingStatistics.fromString(
  98                 busyLock.getMethodWithLockName(), outputAnalyzer.getStdout());
  99 
 100         Asserts.assertEQ(statistics.size(), 1, "VM output should contain "
 101                 + "exactly one rtm locking statistics entry for method "
 102                 + busyLock.getMethodWithLockName());
 103 
 104         Asserts.assertEQ(statistics.get(0).getTotalAborts(), expectedAborts,
 105                 String.format("It is expected to get %d aborts",
 106                         expectedAborts));
 107     }
 108 
 109     public static void main(String args[]) throws Throwable {
 110         new TestRTMRetryCount().test();
 111     }
 112 }