Wed, 27 Aug 2014 08:19:12 -0400
8046598: Scalable Native memory tracking development
Summary: Enhance scalability of native memory tracking
Reviewed-by: coleenp, ctornqvi, gtriantafill
aoqi@0 | 1 | /* |
aoqi@0 | 2 | * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved. |
aoqi@0 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
aoqi@0 | 4 | * |
aoqi@0 | 5 | * This code is free software; you can redistribute it and/or modify it |
aoqi@0 | 6 | * under the terms of the GNU General Public License version 2 only, as |
aoqi@0 | 7 | * published by the Free Software Foundation. |
aoqi@0 | 8 | * |
aoqi@0 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
aoqi@0 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
aoqi@0 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
aoqi@0 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
aoqi@0 | 13 | * accompanied this code). |
aoqi@0 | 14 | * |
aoqi@0 | 15 | * You should have received a copy of the GNU General Public License version |
aoqi@0 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
aoqi@0 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
aoqi@0 | 18 | * |
aoqi@0 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
aoqi@0 | 20 | * or visit www.oracle.com if you need additional information or have any |
aoqi@0 | 21 | * questions. |
aoqi@0 | 22 | * |
aoqi@0 | 23 | */ |
aoqi@0 | 24 | |
aoqi@0 | 25 | /** |
aoqi@0 | 26 | * @test |
aoqi@0 | 27 | * @bug 7009231 |
aoqi@0 | 28 | * @summary C1: Incorrect CAS code for longs on SPARC 32bit |
aoqi@0 | 29 | * |
aoqi@0 | 30 | * @run main/othervm -Xbatch Test7009231 |
aoqi@0 | 31 | * |
aoqi@0 | 32 | */ |
aoqi@0 | 33 | |
aoqi@0 | 34 | import java.util.Random; |
aoqi@0 | 35 | import java.util.concurrent.atomic.AtomicLong; |
aoqi@0 | 36 | |
aoqi@0 | 37 | |
aoqi@0 | 38 | public class Test7009231 { |
aoqi@0 | 39 | public static void main(String[] args) throws InterruptedException { |
aoqi@0 | 40 | doTest(8); |
aoqi@0 | 41 | } |
aoqi@0 | 42 | |
aoqi@0 | 43 | private static void doTest(int nThreads) throws InterruptedException { |
aoqi@0 | 44 | Thread[] aThreads = new Thread[nThreads]; |
aoqi@0 | 45 | final AtomicLong atl = new AtomicLong(); |
aoqi@0 | 46 | |
aoqi@0 | 47 | for (int i = 0; i < nThreads; i++) { |
aoqi@0 | 48 | aThreads[i] = new RunnerThread(atl, 1L << (8 * i)); |
aoqi@0 | 49 | } |
aoqi@0 | 50 | |
aoqi@0 | 51 | for (int i = 0; i < nThreads; i++) { |
aoqi@0 | 52 | aThreads[i].start(); |
aoqi@0 | 53 | } |
aoqi@0 | 54 | |
aoqi@0 | 55 | for (int i = 0; i < nThreads; i++) { |
aoqi@0 | 56 | aThreads[i].join(); |
aoqi@0 | 57 | } |
aoqi@0 | 58 | } |
aoqi@0 | 59 | |
aoqi@0 | 60 | public static class RunnerThread extends Thread { |
aoqi@0 | 61 | public RunnerThread(AtomicLong atomic, long lMask) { |
aoqi@0 | 62 | m_lMask = lMask; |
aoqi@0 | 63 | m_atomic = atomic; |
aoqi@0 | 64 | } |
aoqi@0 | 65 | |
aoqi@0 | 66 | public void run() { |
aoqi@0 | 67 | AtomicLong atomic = m_atomic; |
aoqi@0 | 68 | long lMask = m_lMask; |
aoqi@0 | 69 | for (int i = 0; i < 100000; i++) { |
aoqi@0 | 70 | setBit(atomic, lMask); |
aoqi@0 | 71 | clearBit(atomic, lMask); |
aoqi@0 | 72 | } |
aoqi@0 | 73 | } |
aoqi@0 | 74 | |
aoqi@0 | 75 | protected void setBit(AtomicLong atomic, long lMask) { |
aoqi@0 | 76 | long lWord; |
aoqi@0 | 77 | do { |
aoqi@0 | 78 | lWord = atomic.get(); |
aoqi@0 | 79 | } while (!atomic.compareAndSet(lWord, lWord | lMask)); |
aoqi@0 | 80 | |
aoqi@0 | 81 | if ((atomic.get() & lMask) == 0L) { |
aoqi@0 | 82 | throw new InternalError(); |
aoqi@0 | 83 | } |
aoqi@0 | 84 | } |
aoqi@0 | 85 | |
aoqi@0 | 86 | protected void clearBit(AtomicLong atomic, long lMask) { |
aoqi@0 | 87 | long lWord; |
aoqi@0 | 88 | do { |
aoqi@0 | 89 | lWord = atomic.get(); |
aoqi@0 | 90 | } while (!atomic.compareAndSet(lWord, lWord & ~lMask)); |
aoqi@0 | 91 | |
aoqi@0 | 92 | if ((atomic.get() & lMask) != 0L) { |
aoqi@0 | 93 | throw new InternalError(); |
aoqi@0 | 94 | } |
aoqi@0 | 95 | } |
aoqi@0 | 96 | |
aoqi@0 | 97 | private long m_lMask; |
aoqi@0 | 98 | private AtomicLong m_atomic; |
aoqi@0 | 99 | } |
aoqi@0 | 100 | } |