97 lines
4.1 KiB
Java
97 lines
4.1 KiB
Java
/*
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* Copyright (c) 2023, 2024, 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 TestZNMT
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* @bug 8310743
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* @requires vm.gc.Z & vm.debug
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* @summary Test NMT and ZGC heap reservation / commits interactions.
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* @library / /test/lib
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* @run driver gc.z.TestZNMT
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*/
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import static gc.testlibrary.Allocation.blackHole;
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import java.util.ArrayList;
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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 TestZNMT {
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private static final int XmxInM = 2000;
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static class Test {
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private static final int K = 1024;
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private static final int M = K * K;
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public static void main(String[] args) throws Exception {
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final int zForceDiscontiguousHeapReservations = Integer.parseInt(args[0]);
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final int XmsInM = Integer.parseInt(args[1]);
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// 75% of the largest allocation that fits within one reservation
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// (or Xmx / zForceDiscontiguousHeapReservations), whichever is smallest
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final int allocationInM = (int)(Math.min(zForceDiscontiguousHeapReservations == 0
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? XmxInM
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: XmxInM / zForceDiscontiguousHeapReservations,
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XmsInM) * 0.75);
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ArrayList<byte[]> list = new ArrayList<>(zForceDiscontiguousHeapReservations);
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for (int i = 0; i < zForceDiscontiguousHeapReservations; i++) {
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list.add(new byte[allocationInM * M]);
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}
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blackHole(list);
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}
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}
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private static void testValue(int zForceDiscontiguousHeapReservations) 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 XmsInM = Math.min(16 * XmxInM / (zForceDiscontiguousHeapReservations + 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=" + zForceDiscontiguousHeapReservations,
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"-XX:NativeMemoryTracking=detail",
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"-XX:+PrintNMTStatistics",
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Test.class.getName(),
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Integer.toString(zForceDiscontiguousHeapReservations),
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Integer.toString(XmxInM))
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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 (zForceDiscontiguousHeapReservations > 1) {
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oa.shouldContain("Address Space Type: Discontiguous");
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}
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// We expect to have a report of this type.
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oa.shouldMatch("ZGC heap backing file");
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oa.shouldMatch("allocated \\d+ for Java Heap");
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}
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public static void main(String[] args) throws Exception {
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testValue(100);
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}
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}
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