1 /* 2 * Copyright (c) 2019, 2020, 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.g1; 25 26 /* 27 * @test TestLargePageUseForHeap.java 28 * @summary Test that Java heap is allocated using large pages of the appropriate size if available. 29 * @bug 8221517 30 * @modules java.base/jdk.internal.misc 31 * @library /test/lib 32 * @requires vm.gc.G1 33 * @build sun.hotspot.WhiteBox 34 * @run driver ClassFileInstaller sun.hotspot.WhiteBox 35 * @run main/othervm -Xbootclasspath/a:. -XX:+UseG1GC -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI 36 -XX:+IgnoreUnrecognizedVMOptions -XX:+UseLargePages gc.g1.TestLargePageUseForHeap 37 */ 38 39 import jdk.test.lib.process.OutputAnalyzer; 40 import jdk.test.lib.process.ProcessTools; 41 import jtreg.SkippedException; 42 import sun.hotspot.WhiteBox; 43 44 public class TestLargePageUseForHeap { 45 static long largePageSize; 46 static long smallPageSize; 47 checkSize(OutputAnalyzer output, long expectedSize, String pattern)48 static void checkSize(OutputAnalyzer output, long expectedSize, String pattern) { 49 String pageSizeStr = output.firstMatch(pattern, 1); 50 51 if (pageSizeStr == null) { 52 output.reportDiagnosticSummary(); 53 throw new RuntimeException("Match from '" + pattern + "' got 'null' expected: " + expectedSize); 54 } 55 56 long size = parseMemoryString(pageSizeStr); 57 if (size != expectedSize) { 58 output.reportDiagnosticSummary(); 59 throw new RuntimeException("Match from '" + pattern + "' got " + size + " expected: " + expectedSize); 60 } 61 } 62 checkLargePageEnabled(OutputAnalyzer output)63 static boolean checkLargePageEnabled(OutputAnalyzer output) { 64 // This message is printed when tried to reserve a memory with large page but it failed. 65 String errorStr = "Reserve regular memory without large pages"; 66 String heapPattern = ".*Heap: "; 67 // If errorStr is printed just before heap page log, reservation for Java Heap is failed. 68 String result = output.firstMatch(errorStr + "\n" + 69 "(?:.*Heap address: .*\n)?" // Heap address: 0x00000000f8000000, size: 128 MB, Compressed Oops mode: 32-bit 70 + heapPattern); 71 if (result != null) { 72 return false; 73 } 74 return true; 75 } 76 checkHeap(OutputAnalyzer output, long expectedPageSize)77 static void checkHeap(OutputAnalyzer output, long expectedPageSize) throws Exception { 78 checkSize(output, expectedPageSize, "Heap: .*page_size=([^ ]+)"); 79 } 80 testVM(long regionSize)81 static void testVM(long regionSize) throws Exception { 82 ProcessBuilder pb; 83 // Test with large page enabled. 84 pb = ProcessTools.createJavaProcessBuilder("-XX:+UseG1GC", 85 "-XX:G1HeapRegionSize=" + regionSize, 86 "-Xmx128m", 87 "-Xlog:pagesize,gc+heap+coops=debug", 88 "-XX:+UseLargePages", 89 "-version"); 90 91 OutputAnalyzer output = new OutputAnalyzer(pb.start()); 92 boolean largePageEnabled = checkLargePageEnabled(output); 93 checkHeap(output, largePageEnabled ? largePageSize : smallPageSize); 94 output.shouldHaveExitValue(0); 95 96 // Test with large page disabled. 97 pb = ProcessTools.createJavaProcessBuilder("-XX:+UseG1GC", 98 "-XX:G1HeapRegionSize=" + regionSize, 99 "-Xmx128m", 100 "-Xlog:pagesize,gc+heap+coops=debug", 101 "-XX:-UseLargePages", 102 "-version"); 103 104 output = new OutputAnalyzer(pb.start()); 105 checkHeap(output, smallPageSize); 106 output.shouldHaveExitValue(0); 107 } 108 main(String[] args)109 public static void main(String[] args) throws Exception { 110 WhiteBox wb = WhiteBox.getWhiteBox(); 111 smallPageSize = wb.getVMPageSize(); 112 largePageSize = wb.getVMLargePageSize(); 113 114 if (largePageSize == 0) { 115 throw new SkippedException("Large page support does not seem to be available on this platform."); 116 } 117 if (largePageSize == smallPageSize) { 118 throw new SkippedException("Large page support does not seem to be available on this platform." 119 + "Small and large page size are the same."); 120 } 121 122 // G1HeapRegionSize=1MB 123 testVM(1 * 1024 * 1024); 124 125 // G1HeapRegionSize=2MB 126 testVM(2 * 1024 * 1024); 127 128 // G1HeapRegionSize=8MB 129 testVM(8 * 1024 * 1024); 130 } 131 parseMemoryString(String value)132 public static long parseMemoryString(String value) { 133 long multiplier = 1; 134 135 if (value.endsWith("B")) { 136 multiplier = 1; 137 } else if (value.endsWith("K")) { 138 multiplier = 1024; 139 } else if (value.endsWith("M")) { 140 multiplier = 1024 * 1024; 141 } else if (value.endsWith("G")) { 142 multiplier = 1024 * 1024 * 1024; 143 } else { 144 throw new IllegalArgumentException("Expected memory string '" + value + "'to end with either of: B, K, M, G"); 145 } 146 147 long longValue = Long.parseUnsignedLong(value.substring(0, value.length() - 1)); 148 149 return longValue * multiplier; 150 } 151 } 152