1 /*
   2  * Copyright (c) 2014, 2015, 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 /testlibrary /test/lib /compiler/testlibrary
  30  * @modules java.base/sun.misc
  31  *          java.management
  32  * @build TestRTMRetryCount
  33  * @run main ClassFileInstaller sun.hotspot.WhiteBox
  34  *                              sun.hotspot.WhiteBox$WhiteBoxPermission
  35  * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
  36  *                   -XX:+WhiteBoxAPI TestRTMRetryCount
  37  */
  38 
  39 import java.util.List;
  40 
  41 import jdk.test.lib.*;
  42 import jdk.test.lib.cli.CommandLineOptionTest;
  43 import jdk.test.lib.cli.predicate.AndPredicate;
  44 import rtm.*;
  45 import rtm.predicate.SupportedCPU;
  46 import rtm.predicate.SupportedVM;
  47 
  48 /**
  49  * Test verifies that RTMRetryCount option actually affects amount of
  50  * retries on lock busy.
  51  */
  52 public class TestRTMRetryCount extends CommandLineOptionTest {
  53     /**
  54      * Time in ms, during which busy lock will be locked.
  55      */
  56     private static final int LOCKING_TIME = 5000;
  57     private static final boolean INFLATE_MONITOR = true;
  58 
  59     private TestRTMRetryCount() {
  60         super(new AndPredicate(new SupportedCPU(), new SupportedVM()));
  61     }
  62 
  63     @Override
  64     protected void runTestCases() throws Throwable {
  65         verifyRTMRetryCount(0);
  66         verifyRTMRetryCount(1);
  67         verifyRTMRetryCount(5);
  68         verifyRTMRetryCount(10);
  69     }
  70 
  71     private void verifyRTMRetryCount(int retryCount) throws Throwable {
  72         CompilableTest busyLock = new BusyLock();
  73         long expectedAborts = retryCount + 1L;
  74 
  75         OutputAnalyzer outputAnalyzer = RTMTestBase.executeRTMTest(
  76                 busyLock,
  77                 "-XX:-UseRTMXendForLockBusy",
  78                 "-XX:RTMTotalCountIncrRate=1",
  79                 CommandLineOptionTest.prepareNumericFlag("RTMRetryCount",
  80                         retryCount),
  81                 "-XX:RTMTotalCountIncrRate=1",
  82                 "-XX:+PrintPreciseRTMLockingStatistics",
  83                 BusyLock.class.getName(),
  84                 Boolean.toString(TestRTMRetryCount.INFLATE_MONITOR),
  85                 Integer.toString(TestRTMRetryCount.LOCKING_TIME)
  86         );
  87 
  88         outputAnalyzer.shouldHaveExitValue(0);
  89 
  90         List<RTMLockingStatistics> statistics = RTMLockingStatistics.fromString(
  91                 busyLock.getMethodWithLockName(), outputAnalyzer.getStdout());
  92 
  93         Asserts.assertEQ(statistics.size(), 1, "VM output should contain "
  94                 + "exactly one rtm locking statistics entry for method "
  95                 + busyLock.getMethodWithLockName());
  96 
  97         Asserts.assertEQ(statistics.get(0).getTotalAborts(), expectedAborts,
  98                 String.format("It is expected to get %d aborts",
  99                         expectedAborts));
 100     }
 101 
 102     public static void main(String args[]) throws Throwable {
 103         new TestRTMRetryCount().test();
 104     }
 105 }