TestParallelRegionStride.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
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 * 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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/*
 * @test TestParallelRegionStride
 * @requires vm.gc.Shenandoah
 *
 * @run main/othervm -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:ShenandoahParallelRegionStride=1    -Xmx128m TestParallelRegionStride
 * @run main/othervm -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:ShenandoahParallelRegionStride=10   -Xmx128m TestParallelRegionStride
 * @run main/othervm -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:ShenandoahParallelRegionStride=100  -Xmx128m TestParallelRegionStride
 * @run main/othervm -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:ShenandoahParallelRegionStride=1024 -Xmx128m TestParallelRegionStride
 */

public class TestParallelRegionStride {
    static final long TARGET_MB = Long.getLong("target", 1000); // 1 Gb allocation

    static volatile Object sink;

    public static void main(String[] args) throws Exception {
        long count = TARGET_MB * 1024 * 1024 / 16;
        for (long c = 0; c < count; c++) {
            sink = new Object();
        }
    }
}