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