84 lines
2.7 KiB
Java
84 lines
2.7 KiB
Java
/*
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* Copyright (c) 2022, 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.g1;
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/*
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* @test
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* @bug 8297186
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* @requires vm.gc.G1
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* @library /test/lib
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* @run driver gc.g1.TestOneEdenRegionAfterGC
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* @summary Test that on a very small heap g1 with very little data (smaller than region size)
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* will use at least one eden region after gc to avoid full gcs.
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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 TestOneEdenRegionAfterGC {
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private static long YoungGenSize = 32 * 1024 * 1024;
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private static OutputAnalyzer run() throws Exception {
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return ProcessTools.executeLimitedTestJava(
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"-Xbootclasspath/a:.",
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"-Xmn" + YoungGenSize,
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"-Xmx512M",
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"-Xms512M",
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"-XX:G1HeapRegionSize=32M",
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"-XX:+UseG1GC",
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"-Xlog:gc,gc+ergo*=trace",
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TestOneEdenRegionAfterGC.Allocate.class.getName(),
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"" + YoungGenSize);
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}
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public static void main(String args[]) throws Exception {
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OutputAnalyzer out = run();
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out.shouldMatch(".*Pause Young \\(Normal\\).*");
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out.shouldNotMatch(".*Pause Full.*");
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}
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public static class Allocate {
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public static Object dummy;
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public static void main(String [] args) throws Exception {
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if (args.length != 1) {
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throw new IllegalArgumentException("Usage: <YoungGenSize>");
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}
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long youngGenSize = Long.parseLong(args[0]);
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triggerYoungGCs(youngGenSize);
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}
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public static void triggerYoungGCs(long youngGenSize) {
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long approxAllocSize = 32 * 1024;
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long numAllocations = 2 * youngGenSize / approxAllocSize;
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for (long i = 0; i < numAllocations; i++) {
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dummy = new byte[(int)approxAllocSize];
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}
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}
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}
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}
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