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