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/*
* Copyright (c) 2010, 2018, Oracle and/or its affiliates. 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.
*/
package vm.mlvm.share;
import vm.share.options.Option;
import java.util.concurrent.CyclicBarrier;
public abstract class MultiThreadedTest extends MlvmTest {
@Option(name = "threadsExtra", default_value = "1",
description = "Summand of absolute thread count that does not"
+ " depend on CPU count")
private int threadsExtra;
@Option(name = "threadsPerCpu", default_value = "0",
description = "Summand of absolute thread count that is multiplied"
+ " by CPU count")
private int threadsPerCpu;
protected MultiThreadedTest() {
// fields will be initialized later by the Option framework
}
protected abstract boolean runThread(int threadNum) throws Throwable;
protected int calcThreadNum() {
// TODO: multiply by StressThreadFactor: JDK-8142970
return threadsPerCpu * Runtime.getRuntime().availableProcessors()
+ threadsExtra;
}
@Override
public boolean run() throws Throwable {
Thread.UncaughtExceptionHandler exHandler = (Thread t, Throwable e) -> {
markTestFailed("Exception in thread %s" + t.getName(), e);
};
int threadNum = calcThreadNum();
Env.traceNormal("Threads to start in this test: " + threadNum);
final CyclicBarrier startBarrier = new CyclicBarrier(threadNum + 1);
Thread[] threads = new Thread[threadNum];
for (int i = 0; i < threadNum; i++) {
final int ii = i;
threads[i] = new Thread(() -> {
boolean passed = false;
try {
startBarrier.await();
if (runThread(ii)) {
passed = true;
} else {
Env.complain("Failed test in %s",
Thread.currentThread());
}
} catch (Throwable e) {
Env.complain(e, "Caught exception in %s",
Thread.currentThread());
}
if (!passed) {
markTestFailed("Thread " + Thread.currentThread()
+ " failed");
}
});
threads[i].setUncaughtExceptionHandler(exHandler);
threads[i].start();
}
startBarrier.await();
Env.traceNormal(threadNum + " threads have started");
for (int i = 0; i < threadNum; i++) {
threads[i].join();
}
Env.traceNormal("All threads have finished");
return true;
}
}
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