102 lines
4.2 KiB
Java
102 lines
4.2 KiB
Java
/*
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* Copyright (c) 2016, 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.arguments;
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/*
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* @test TestSmallInitialHeapWithLargePageAndNUMA
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* @bug 8023905
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* @requires os.family == "linux"
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* @requires vm.gc.Parallel
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* @summary Check large pages and NUMA are working together via the output message.
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* @library /test/lib
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* @library /
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* @modules java.base/jdk.internal.misc
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* @modules java.management/sun.management
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* @build TestSmallInitialHeapWithLargePageAndNUMA
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* @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
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* @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI gc.arguments.TestSmallInitialHeapWithLargePageAndNUMA
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*/
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import jdk.test.lib.process.OutputAnalyzer;
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import jdk.test.whitebox.WhiteBox;
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import jtreg.SkippedException;
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public class TestSmallInitialHeapWithLargePageAndNUMA {
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private static final String MSG_EXIT_TOO_SMALL_HEAP = "Failed initializing NUMA with large pages. Too small heap size";
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private static final String MSG_GC_TRIGGERED_BEFORE_INIT = "GC triggered before VM initialization completed.";
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public static void main(String[] args) throws Exception {
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WhiteBox wb = WhiteBox.getWhiteBox();
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long heapAlignment = wb.getHeapAlignment();
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// When using large pages, Linux does not support freeing parts of reserved and committed memory.
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// And current Linux implementation uses page size as a condition to actually freeing memory.
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// If we allocate pages less than NUMA node, NUMA will try to use default page size and
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// this will free the memory which Linux does not support.
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// Assume the minimum NUMA node as 2.
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long initHeap = heapAlignment;
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long maxHeap = heapAlignment * 2;
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OutputAnalyzer analyzer = GCArguments.executeLimitedTestJava(
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"-XX:+UseParallelGC",
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"-Xms" + String.valueOf(initHeap),
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"-Xmx" + String.valueOf(maxHeap),
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"-XX:+UseNUMA",
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"-XX:+PrintFlagsFinal",
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"-version");
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if (largePageOrNumaEnabled(analyzer)) {
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// We reach here, if both NUMA and HugeTLB are supported.
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// However final flags will not be printed as NUMA initialization will be failed.
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checkAnalyzerValues(analyzer, 1, MSG_EXIT_TOO_SMALL_HEAP);
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} else {
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throw new SkippedException("either NUMA or HugeTLB is not supported");
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}
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}
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// If both NUMA and large pages are enabled, VM will exit during NUMA initialization
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// under the small heap configuration. So final flags will not be printed.
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private static boolean largePageOrNumaEnabled(OutputAnalyzer analyzer) {
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String output = analyzer.getOutput();
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return !output.contains("[Global flags]");
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}
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// We need to test with small heap but fastdebug binary fails to initialize because of the small heap.
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// So skip that case.
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private static void checkAnalyzerValues(OutputAnalyzer analyzer, int expectedExitValue, String expectedMessage) {
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String output = analyzer.getOutput();
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// If the VM exits because of the small heap, skip checking the exit value.
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if (!output.contains(MSG_GC_TRIGGERED_BEFORE_INIT)) {
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analyzer.shouldHaveExitValue(expectedExitValue);
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}
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if (expectedMessage != null) {
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analyzer.shouldContain(expectedMessage);
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}
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}
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}
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