TestMaxTLAB.java

/*
 * Copyright (c) 2018, Red Hat, Inc. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
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 * published by the Free Software Foundation.
 *
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 * 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.
 *
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 */

package gc.epsilon;

/**
 * @test TestMaxTLAB
 * @requires vm.gc.Epsilon
 * @summary Check EpsilonMaxTLAB options
 * @bug 8212177
 *
 * @run main/othervm -Xmx64m
 *                   -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC
 *                   -XX:EpsilonMaxTLABSize=1
 *                   gc.epsilon.TestMaxTLAB
 *
 * @run main/othervm -Xmx64m
 *                   -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC
 *                   -XX:EpsilonMaxTLABSize=1K
 *                   gc.epsilon.TestMaxTLAB
 *
 * @run main/othervm -Xmx64m
 *                   -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC
 *                   -XX:EpsilonMaxTLABSize=1M
 *                   gc.epsilon.TestMaxTLAB
 *
 * @run main/othervm -Xmx64m
 *                   -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC
 *                   -XX:EpsilonMaxTLABSize=12345
 *                   gc.epsilon.TestMaxTLAB
 *
 * @run main/othervm -Xmx64m
 *                   -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC
 *                   -XX:EpsilonMaxTLABSize=1
 *                   -XX:+IgnoreUnrecognizedVMOptions -XX:ObjectAlignmentInBytes=16
 *                   gc.epsilon.TestMaxTLAB
 *
 * @run main/othervm -Xmx64m
 *                   -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC
 *                   -XX:EpsilonMaxTLABSize=1K
 *                   -XX:+IgnoreUnrecognizedVMOptions -XX:ObjectAlignmentInBytes=16
 *                   gc.epsilon.TestMaxTLAB
 *
 * @run main/othervm -Xmx64m
 *                   -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC
 *                   -XX:EpsilonMaxTLABSize=1M
 *                   -XX:+IgnoreUnrecognizedVMOptions -XX:ObjectAlignmentInBytes=16
 *                   gc.epsilon.TestMaxTLAB
 *
 * @run main/othervm -Xmx64m
 *                   -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC
 *                   -XX:EpsilonMaxTLABSize=12345
 *                   -XX:+IgnoreUnrecognizedVMOptions -XX:ObjectAlignmentInBytes=16
 *                   gc.epsilon.TestMaxTLAB
 */

public class TestMaxTLAB {
    static Object sink;

    public static void main(String[] args) throws Exception {
        for (int c = 0; c < 1000; c++) {
            sink = new byte[c];
        }
    }
}