1 /* 2 * Copyright (c) 2010, 2018, 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 package vm.mlvm.share; 25 26 import vm.share.options.Option; 27 28 import java.util.concurrent.CyclicBarrier; 29 30 31 public abstract class MultiThreadedTest extends MlvmTest { 32 33 @Option(name = "threadsExtra", default_value = "1", 34 description = "Summand of absolute thread count that does not" 35 + " depend on CPU count") 36 private int threadsExtra; 37 38 @Option(name = "threadsPerCpu", default_value = "0", 39 description = "Summand of absolute thread count that is multiplied" 40 + " by CPU count") 41 private int threadsPerCpu; 42 43 protected MultiThreadedTest() { 44 // fields will be initialized later by the Option framework 45 } 46 47 protected abstract boolean runThread(int threadNum) throws Throwable; 48 49 protected int calcThreadNum() { 50 // TODO: multiply by StressThreadFactor: JDK-8142970 51 return threadsPerCpu * Runtime.getRuntime().availableProcessors() 52 + threadsExtra; 53 } 54 55 @Override 56 public boolean run() throws Throwable { 57 Thread.UncaughtExceptionHandler exHandler = (Thread t, Throwable e) -> { 58 markTestFailed("Exception in thread %s" + t.getName(), e); 59 }; 60 int threadNum = calcThreadNum(); 61 Env.traceNormal("Threads to start in this test: " + threadNum); 62 final CyclicBarrier startBarrier = new CyclicBarrier(threadNum + 1); 63 64 Thread[] threads = new Thread[threadNum]; 65 for (int i = 0; i < threadNum; i++) { 66 final int ii = i; 67 threads[i] = new Thread(() -> { 68 boolean passed = false; 69 try { 70 startBarrier.await(); 71 if (runThread(ii)) { 72 passed = true; 73 } else { 74 Env.complain("Failed test in %s", 75 Thread.currentThread()); 76 } 77 } catch (Throwable e) { 78 Env.complain(e, "Caught exception in %s", 79 Thread.currentThread()); 80 } 81 if (!passed) { 82 markTestFailed("Thread " + Thread.currentThread() 83 + " failed"); 84 } 85 }); 86 threads[i].setUncaughtExceptionHandler(exHandler); 87 threads[i].start(); 88 } 89 90 startBarrier.await(); 91 Env.traceNormal(threadNum + " threads have started"); 92 93 for (int i = 0; i < threadNum; i++) { 94 threads[i].join(); 95 } 96 97 Env.traceNormal("All threads have finished"); 98 return true; 99 } 100 101 }