70 lines
2.6 KiB
Java
70 lines
2.6 KiB
Java
/*
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* Copyright (c) 2023, Oracle and/or its affiliates. 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.z;
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/**
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* @test TestZForceDiscontiguousHeapReservations
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* @requires vm.gc.Z & vm.debug
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* @summary Test the ZForceDiscontiguousHeapReservations development flag
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* @library /test/lib
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* @run driver gc.z.TestZForceDiscontiguousHeapReservations
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*/
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import jdk.test.lib.process.OutputAnalyzer;
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import jdk.test.lib.process.ProcessTools;
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public class TestZForceDiscontiguousHeapReservations {
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private static void testValue(int n) throws Exception {
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/**
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* Xmx is picked so that it is divisible by 'ZForceDiscontiguousHeapReservations * ZGranuleSize'
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* Xms is picked so that it is less than '16 * Xmx / ZForceDiscontiguousHeapReservations' as ZGC
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* cannot currently handle a discontiguous heap with an initial size larger than the individual
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* reservations.
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*/
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final int XmxInM = 2000;
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final int XmsInM = Math.min(16 * XmxInM / (n + 1), XmxInM);
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OutputAnalyzer oa = ProcessTools.executeTestJava(
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"-XX:+UseZGC",
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"-Xms" + XmsInM + "M",
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"-Xmx" + XmxInM + "M",
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"-Xlog:gc,gc+init",
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"-XX:ZForceDiscontiguousHeapReservations=" + n,
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"-version")
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.outputTo(System.out)
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.errorTo(System.out)
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.shouldHaveExitValue(0);
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if (n > 1) {
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oa.shouldContain("Address Space Type: Discontiguous");
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}
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}
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public static void main(String[] args) throws Exception {
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testValue(0);
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testValue(1);
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testValue(2);
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testValue(100);
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}
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}
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