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8268699: Shenandoah: Add test for JDK-8268127 #4486

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/*
* Copyright (c) 2021, Red Hat, Inc. 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.
*
*/

/*
* @test id=default
* @requires vm.gc.Shenandoah
* @bug 8268127
* @summary when heap is too small for regions to align to large page size, should fallback to regular page size
*
* @run main/othervm -XX:+UseShenandoahGC -Xms17m -Xmx17m TestLargePagesWithSmallHeap
* @run main/othervm -XX:+UseShenandoahGC -Xmx17m TestLargePagesWithSmallHeap
* @run main/othervm -XX:+UseShenandoahGC -Xms17m TestLargePagesWithSmallHeap
*
* @run main/othervm -XX:+UseShenandoahGC -Xms17m -Xmx17m TestLargePagesWithSmallHeap
* @run main/othervm -XX:+UseShenandoahGC -Xmx17m TestLargePagesWithSmallHeap
* @run main/othervm -XX:+UseShenandoahGC -Xms17m TestLargePagesWithSmallHeap
*/

/*
* @test id=lp
* @requires vm.gc.Shenandoah
*
* @run main/othervm -XX:+UseShenandoahGC -XX:+UseLargePages -Xms17m -Xmx17m TestLargePagesWithSmallHeap
* @run main/othervm -XX:+UseShenandoahGC -XX:+UseLargePages -Xmx17m TestLargePagesWithSmallHeap
* @run main/othervm -XX:+UseShenandoahGC -XX:+UseLargePages -Xms17m TestLargePagesWithSmallHeap
*
* @run main/othervm -XX:+UseShenandoahGC -XX:+UseLargePages -Xms17m -Xmx17m TestLargePagesWithSmallHeap
* @run main/othervm -XX:+UseShenandoahGC -XX:+UseLargePages -Xmx17m TestLargePagesWithSmallHeap
* @run main/othervm -XX:+UseShenandoahGC -XX:+UseLargePages -Xms17m TestLargePagesWithSmallHeap
*/

/*
* @test id=thp
* @requires vm.gc.Shenandoah
* @requires os.family == "linux"
*
* @run main/othervm -XX:+UseShenandoahGC -XX:+UseTransparentHugePages -Xms17m -Xmx17m TestLargePagesWithSmallHeap
* @run main/othervm -XX:+UseShenandoahGC -XX:+UseTransparentHugePages -Xmx17m TestLargePagesWithSmallHeap
* @run main/othervm -XX:+UseShenandoahGC -XX:+UseTransparentHugePages -Xms17m TestLargePagesWithSmallHeap
*
* @run main/othervm -XX:+UseShenandoahGC -XX:+UseTransparentHugePages -Xms17m -Xmx17m TestLargePagesWithSmallHeap
* @run main/othervm -XX:+UseShenandoahGC -XX:+UseTransparentHugePages -Xmx17m TestLargePagesWithSmallHeap
* @run main/othervm -XX:+UseShenandoahGC -XX:+UseTransparentHugePages -Xms17m TestLargePagesWithSmallHeap
*/

public class TestLargePagesWithSmallHeap {
public static void main(String[] args) {
// Everything is checked on initialization
}
}