| /* |
| * Copyright (c) 2016, 2017, Oracle and/or its affiliates. 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 |
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| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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| */ |
| |
| /* |
| * @test TestSmallInitialHeapWithLargePageAndNUMA |
| * @bug 8023905 |
| * @requires os.family == "linux" |
| * @requires vm.gc.Parallel |
| * @summary Check large pages and NUMA are working together via the output message. |
| * @library /test/lib |
| * @modules java.base/jdk.internal.misc |
| * @modules java.management/sun.management |
| * @build TestSmallInitialHeapWithLargePageAndNUMA |
| * @run driver ClassFileInstaller sun.hotspot.WhiteBox |
| * @run main/othervm -Xbootclasspath/a:. -XX:+UseHugeTLBFS -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI TestSmallInitialHeapWithLargePageAndNUMA |
| */ |
| |
| import jdk.test.lib.process.ProcessTools; |
| import jdk.test.lib.process.OutputAnalyzer; |
| import sun.hotspot.WhiteBox; |
| |
| public class TestSmallInitialHeapWithLargePageAndNUMA { |
| |
| private static final String MSG_EXIT_TOO_SMALL_HEAP = "Failed initializing NUMA with large pages. Too small heap size"; |
| private static final String MSG_GC_TRIGGERED_BEFORE_INIT = "GC triggered before VM initialization completed."; |
| |
| public static void main(String[] args) throws Exception { |
| |
| WhiteBox wb = WhiteBox.getWhiteBox(); |
| long heapAlignment = wb.getHeapAlignment(); |
| |
| // When using large pages, Linux does not support freeing parts of reserved and committed memory. |
| // And current Linux implementation uses page size as a condition to actually freeing memory. |
| // If we allocate pages less than NUMA node, NUMA will try to use default page size and |
| // this will free the memory which Linux does not support. |
| // Assume the minimum NUMA node as 2. |
| long initHeap = heapAlignment; |
| long maxHeap = heapAlignment * 2; |
| |
| String[] vmArgs = {"-XX:+UseParallelGC", |
| "-Xms" + String.valueOf(initHeap), |
| "-Xmx" + String.valueOf(maxHeap), |
| "-XX:+UseNUMA", |
| "-XX:+UseHugeTLBFS", |
| "-XX:+PrintFlagsFinal", |
| "-version"}; |
| |
| ProcessBuilder pb_enabled = ProcessTools.createJavaProcessBuilder(vmArgs); |
| OutputAnalyzer analyzer = new OutputAnalyzer(pb_enabled.start()); |
| |
| if (largePageOrNumaEnabled(analyzer)) { |
| // We reach here, if both NUMA and HugeTLB are supported. |
| // However final flags will not be printed as NUMA initialization will be failed. |
| checkAnalyzerValues(analyzer, 1, MSG_EXIT_TOO_SMALL_HEAP); |
| } |
| } |
| |
| // If both NUMA and large pages are enabled, VM will exit during NUMA initialization |
| // under the small heap configuration. So final flags will not be printed. |
| private static boolean largePageOrNumaEnabled(OutputAnalyzer analyzer) { |
| String output = analyzer.getOutput(); |
| |
| return !output.contains("[Global flags]"); |
| } |
| |
| // We need to test with small heap but fastdebug binary fails to initialize because of the small heap. |
| // So skip that case. |
| private static void checkAnalyzerValues(OutputAnalyzer analyzer, int expectedExitValue, String expectedMessage) { |
| String output = analyzer.getOutput(); |
| |
| // If the VM exits because of the small heap, skip checking the exit value. |
| if (!output.contains(MSG_GC_TRIGGERED_BEFORE_INIT)) { |
| analyzer.shouldHaveExitValue(expectedExitValue); |
| } |
| if (expectedMessage != null) { |
| analyzer.shouldContain(expectedMessage); |
| } |
| } |
| } |