jdk8-mips64-public/hotspot: test/compiler/membars/DekkerTest.java@e8225dc7c94b (annotated)

test/compiler/membars/DekkerTest.java@e8225dc7c94b (annotated)

test/compiler/membars/DekkerTest.java

Wed, 05 Mar 2014 10:20:30 +0100

author: anoll
date: Wed, 05 Mar 2014 10:20:30 +0100
changeset 7308: e8225dc7c94b
parent 0: f90c822e73f8
permissions: -rw-r--r--

8036091: compiler/membars/DekkerTest.java fails with -XX:CICompilerCount=1
Summary: Start test with -XX:-TieredCompilation so that one compiler thread works
Reviewed-by: kvn, twisti

 /*
  * Copyright 2013 SAP AG.  All Rights Reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  */
 /**
  * @test
  * @bug 8007898
  * @summary Incorrect optimization of Memory Barriers in Matcher::post_store_load_barrier().
  * @run main/othervm -Xbatch -XX:+IgnoreUnrecognizedVMOptions -XX:CICompilerCount=1 -XX:-TieredCompilation -XX:+StressGCM -XX:+StressLCM DekkerTest
  * @run main/othervm -Xbatch -XX:+IgnoreUnrecognizedVMOptions -XX:CICompilerCount=1 -XX:-TieredCompilation -XX:+StressGCM -XX:+StressLCM DekkerTest
  * @run main/othervm -Xbatch -XX:+IgnoreUnrecognizedVMOptions -XX:CICompilerCount=1 -XX:-TieredCompilation -XX:+StressGCM -XX:+StressLCM DekkerTest
  * @author Martin Doerr martin DOT doerr AT sap DOT com
  *
  * Run 3 times since the failure is intermittent.
  */
 public class DekkerTest {
     /*
       Read After Write Test (basically a simple Dekker test with volatile variables)
       Derived from the original jcstress test, available at:
         http://hg.openjdk.java.net/code-tools/jcstress/file/6c339a5aa00d/
         tests-custom/src/main/java/org/openjdk/jcstress/tests/volatiles/DekkerTest.java
      */
     static final int ITERATIONS = 1000000;
     static class TestData {
         public volatile int a;
         public volatile int b;
     }
     static class ResultData {
         public int a;
         public int b;
     }
     TestData[]   testDataArray;
     ResultData[] results;
     volatile boolean start;
     public DekkerTest() {
         testDataArray = new TestData[ITERATIONS];
         results = new ResultData[ITERATIONS];
         for (int i = 0; i < ITERATIONS; ++i) {
             testDataArray[i] = new TestData();
             results[i] = new ResultData();
         }
         start = false;
     }
     public void reset() {
         for (int i = 0; i < ITERATIONS; ++i) {
             testDataArray[i].a = 0;
             testDataArray[i].b = 0;
             results[i].a = 0;
             results[i].b = 0;
         }
         start = false;
     }
     int actor1(TestData t) {
         t.a = 1;
         return t.b;
     }
     int actor2(TestData t) {
         t.b = 1;
         return t.a;
     }
     class Runner1 extends Thread {
         public void run() {
             do {} while (!start);
             for (int i = 0; i < ITERATIONS; ++i) {
                 results[i].a = actor1(testDataArray[i]);
             }
         }
     }
     class Runner2 extends Thread {
         public void run() {
             do {} while (!start);
             for (int i = 0; i < ITERATIONS; ++i) {
                 results[i].b = actor2(testDataArray[i]);
             }
         }
     }
     void testRunner() {
         Thread thread1 = new Runner1();
         Thread thread2 = new Runner2();
         thread1.start();
         thread2.start();
         do {} while (!thread1.isAlive());
         do {} while (!thread2.isAlive());
         start = true;
         Thread.yield();
         try {
             thread1.join();
             thread2.join();
         } catch (InterruptedException e) {
             System.out.println("interrupted!");
             System.exit(1);
         }
     }
     boolean printResult() {
         int[] count = new int[4];
         for (int i = 0; i < ITERATIONS; ++i) {
             int event_kind = (results[i].a << 1) + results[i].b;
             ++count[event_kind];
         }
         if (count[0] == 0 && count[3] == 0) {
             System.out.println("[not interesting]");
             return false; // not interesting
         }
         String error = (count[0] == 0) ? " ok" : " disallowed!";
         System.out.println("[0,0] " + count[0] + error);
         System.out.println("[0,1] " + count[1]);
         System.out.println("[1,0] " + count[2]);
         System.out.println("[1,1] " + count[3]);
         return (count[0] != 0);
     }
     public static void main(String args[]) {
         DekkerTest test = new DekkerTest();
         final int runs = 30;
         int failed = 0;
         for (int c = 0; c < runs; ++c) {
             test.testRunner();
             if (test.printResult()) {
                 failed++;
             }
             test.reset();
         }
         if (failed > 0) {
             throw new InternalError("FAILED. Got " + failed + " failed ITERATIONS");
         }
         System.out.println("PASSED.");
     }
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

test/compiler/membars/DekkerTest.java@e8225dc7c94b (annotated)

test/compiler/membars/DekkerTest.java