107 lines
3.7 KiB
Java
107 lines
3.7 KiB
Java
/*
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* Copyright (c) 2017, 2018, Red Hat, Inc. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package gc.epsilon;
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/**
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* @test TestManyThreads
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* @requires vm.gc.Epsilon
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* @summary Test allocations from many threads
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*
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* @run main/othervm -XX:-UseTLAB -Xmx256m -Xss512k
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* -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC
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* gc.epsilon.TestManyThreads
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*
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* @run main/othervm -XX:-UseTLAB -Xmx256m -Xss512k
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* -Xint
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* -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC
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* gc.epsilon.TestManyThreads
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*
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* @run main/othervm -XX:-UseTLAB -Xmx256m -Xss512k
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* -Xbatch -Xcomp -XX:TieredStopAtLevel=1
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* -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC
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* gc.epsilon.TestManyThreads
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*
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* @run main/othervm -XX:-UseTLAB -Xmx256m -Xss512k
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* -Xbatch -Xcomp -XX:-TieredCompilation
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* -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC
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* gc.epsilon.TestManyThreads
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*
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* @run main/othervm -XX:+UseTLAB -Xmx256m -Xss512k
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* -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC
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* gc.epsilon.TestManyThreads
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*
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* @run main/othervm -XX:+UseTLAB -Xmx256m -Xss512k
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* -Xint
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* -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC
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* gc.epsilon.TestManyThreads
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*
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* @run main/othervm -XX:+UseTLAB -Xmx256m -Xss512k
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* -Xbatch -Xcomp -XX:TieredStopAtLevel=1
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* -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC
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* gc.epsilon.TestManyThreads
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*
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* @run main/othervm -XX:+UseTLAB -Xmx256m -Xss512k
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* -Xbatch -Xcomp -XX:-TieredCompilation
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* -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC
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* gc.epsilon.TestManyThreads
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*/
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import java.util.concurrent.atomic.*;
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public class TestManyThreads {
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static int COUNT = Integer.getInteger("count", 128); // 128 * 4M max tlabs = 512M, would overflow without TLAB sizing
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static volatile Object sink;
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static volatile Throwable failed;
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static final AtomicInteger allocated = new AtomicInteger();
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public static void workload() {
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try {
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sink = new Object();
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allocated.incrementAndGet();
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Thread.sleep(3600 * 1000);
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} catch (Throwable e) {
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failed = e;
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}
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}
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public static void main(String[] args) throws Throwable {
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for (int c = 0; c < COUNT; c++) {
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Thread t = new Thread(TestManyThreads::workload);
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t.setDaemon(true);
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t.start();
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}
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while ((failed == null) && (allocated.get() != COUNT)) {
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Thread.sleep(100);
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}
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if (failed != null) {
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throw failed;
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}
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}
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}
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