1 /* 2 * Copyright (c) 2016, 2019, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 package gc.arguments; 25 26 /* 27 * @test TestSmallInitialHeapWithLargePageAndNUMA 28 * @bug 8023905 29 * @requires os.family == "linux" 30 * @requires vm.gc.Parallel 31 * @summary Check large pages and NUMA are working together via the output message. 32 * @library /test/lib 33 * @library / 34 * @modules java.base/jdk.internal.misc 35 * @modules java.management/sun.management 36 * @build TestSmallInitialHeapWithLargePageAndNUMA 37 * @run driver ClassFileInstaller sun.hotspot.WhiteBox 38 * @run main/othervm -Xbootclasspath/a:. -XX:+UseHugeTLBFS -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI gc.arguments.TestSmallInitialHeapWithLargePageAndNUMA 39 */ 40 41 import jdk.test.lib.process.ProcessTools; 42 import jdk.test.lib.process.OutputAnalyzer; 43 import sun.hotspot.WhiteBox; 44 45 public class TestSmallInitialHeapWithLargePageAndNUMA { 46 47 private static final String MSG_EXIT_TOO_SMALL_HEAP = "Failed initializing NUMA with large pages. Too small heap size"; 48 private static final String MSG_GC_TRIGGERED_BEFORE_INIT = "GC triggered before VM initialization completed."; 49 main(String[] args)50 public static void main(String[] args) throws Exception { 51 52 WhiteBox wb = WhiteBox.getWhiteBox(); 53 long heapAlignment = wb.getHeapAlignment(); 54 55 // When using large pages, Linux does not support freeing parts of reserved and committed memory. 56 // And current Linux implementation uses page size as a condition to actually freeing memory. 57 // If we allocate pages less than NUMA node, NUMA will try to use default page size and 58 // this will free the memory which Linux does not support. 59 // Assume the minimum NUMA node as 2. 60 long initHeap = heapAlignment; 61 long maxHeap = heapAlignment * 2; 62 63 String[] vmArgs = {"-XX:+UseParallelGC", 64 "-Xms" + String.valueOf(initHeap), 65 "-Xmx" + String.valueOf(maxHeap), 66 "-XX:+UseNUMA", 67 "-XX:+UseHugeTLBFS", 68 "-XX:+PrintFlagsFinal", 69 "-version"}; 70 71 ProcessBuilder pb_enabled = GCArguments.createJavaProcessBuilder(vmArgs); 72 OutputAnalyzer analyzer = new OutputAnalyzer(pb_enabled.start()); 73 74 if (largePageOrNumaEnabled(analyzer)) { 75 // We reach here, if both NUMA and HugeTLB are supported. 76 // However final flags will not be printed as NUMA initialization will be failed. 77 checkAnalyzerValues(analyzer, 1, MSG_EXIT_TOO_SMALL_HEAP); 78 } 79 } 80 81 // If both NUMA and large pages are enabled, VM will exit during NUMA initialization 82 // under the small heap configuration. So final flags will not be printed. largePageOrNumaEnabled(OutputAnalyzer analyzer)83 private static boolean largePageOrNumaEnabled(OutputAnalyzer analyzer) { 84 String output = analyzer.getOutput(); 85 86 return !output.contains("[Global flags]"); 87 } 88 89 // We need to test with small heap but fastdebug binary fails to initialize because of the small heap. 90 // So skip that case. checkAnalyzerValues(OutputAnalyzer analyzer, int expectedExitValue, String expectedMessage)91 private static void checkAnalyzerValues(OutputAnalyzer analyzer, int expectedExitValue, String expectedMessage) { 92 String output = analyzer.getOutput(); 93 94 // If the VM exits because of the small heap, skip checking the exit value. 95 if (!output.contains(MSG_GC_TRIGGERED_BEFORE_INIT)) { 96 analyzer.shouldHaveExitValue(expectedExitValue); 97 } 98 if (expectedMessage != null) { 99 analyzer.shouldContain(expectedMessage); 100 } 101 } 102 } 103