Mercurial > hg > truffle
annotate src/share/vm/prims/jvmtiGen.java @ 20543:e7d0505c8a30
8059758: Footprint regressions with JDK-8038423
Summary: Changes in JDK-8038423 always initialize (zero out) virtual memory used for auxiliary data structures. This causes a footprint regression for G1 in startup benchmarks. This is because they do not touch that memory at all, so the operating system does not actually commit these pages. The fix is to, if the initialization value of the data structures matches the default value of just committed memory (=0), do not do anything.
Reviewed-by: jwilhelm, brutisso
| author | tschatzl |
|---|---|
| date | Fri, 10 Oct 2014 15:51:58 +0200 |
| parents | f2110083203d |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 10405 | 2 * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved. |
| 0 | 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 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 25 import javax.xml.parsers.DocumentBuilder; | |
| 26 import javax.xml.parsers.DocumentBuilderFactory; | |
| 27 import javax.xml.parsers.FactoryConfigurationError; | |
| 28 import javax.xml.parsers.ParserConfigurationException; | |
| 29 | |
| 30 import org.xml.sax.SAXException; | |
| 31 import org.xml.sax.SAXParseException; | |
| 32 import org.w3c.dom.Document; | |
| 33 import org.w3c.dom.DOMException; | |
| 34 // For write operation | |
| 35 import javax.xml.transform.Transformer; | |
| 36 import javax.xml.transform.TransformerException; | |
| 37 import javax.xml.transform.TransformerFactory; | |
| 38 import javax.xml.transform.TransformerConfigurationException; | |
| 39 import javax.xml.transform.dom.DOMSource; | |
| 40 import javax.xml.transform.stream.StreamSource; | |
| 41 import javax.xml.transform.stream.StreamResult; | |
| 42 | |
| 43 import java.io.*; | |
| 44 | |
| 45 public class jvmtiGen | |
| 46 { | |
| 47 /** | |
| 48 * Write out usage and exit. | |
| 49 */ | |
| 50 private static void showUsage() { | |
| 51 System.err.println("usage:"); | |
| 52 System.err.println(" java jvmtiGen " + | |
| 53 "-IN <input XML file name> " + | |
| 54 "-XSL <XSL file> " + | |
| 55 "-OUT <output file name> " + | |
| 56 "[-PARAM <name> <expression> ...]"); | |
| 57 System.exit(0); // There is no returning from showUsage() | |
| 58 } | |
| 59 | |
| 60 // Global value so it can be ref'd by the tree-adapter | |
| 61 static Document document; | |
| 62 | |
| 63 public static void main (String argv []) | |
| 64 { | |
| 65 String inFileName=null; | |
| 66 String xslFileName=null; | |
| 67 String outFileName=null; | |
| 68 java.util.Vector<String> params=new java.util.Vector<String>(); | |
| 69 for (int ii = 0; ii < argv.length; ii++) { | |
| 70 if (argv[ii].equals("-IN")) { | |
| 71 inFileName = argv[++ii]; | |
| 72 } else if (argv[ii].equals("-XSL")) { | |
| 73 xslFileName = argv[++ii]; | |
| 74 } else if (argv[ii].equals("-OUT")) { | |
| 75 outFileName = argv[++ii]; | |
| 76 } else if (argv[ii].equals("-PARAM")) { | |
| 77 if (ii + 2 < argv.length) { | |
| 78 String name = argv[++ii]; | |
| 79 params.addElement(name); | |
| 80 String expression = argv[++ii]; | |
| 81 params.addElement(expression); | |
| 82 } else { | |
| 83 showUsage(); | |
| 84 } | |
| 85 } else { | |
| 86 showUsage(); | |
| 87 } | |
| 88 } | |
| 89 if (inFileName==null || xslFileName==null || outFileName==null){ | |
| 90 showUsage(); | |
| 91 } | |
| 92 | |
| 93 /* | |
| 94 * Due to JAXP breakage in some intermediate Tiger builds, the | |
| 95 * com.sun.org.apache..... parser may throw an exception: | |
| 96 * com.sun.org.apache.xml.internal.utils.WrappedRuntimeException: | |
| 97 * org.apache.xalan.serialize.SerializerToText | |
| 98 * | |
| 99 * To work around the problem, this program uses the | |
| 100 * org.apache.xalan.... version if it is available. It is | |
| 101 * available in J2SE 1.4.x and early builds of 1.5 (Tiger). | |
| 102 * It was removed at the same time the thrown exception issue | |
| 103 * above was fixed, so if the class is not found we can proceed | |
| 104 * and use the default parser. | |
| 105 */ | |
| 106 final String parserProperty = | |
| 107 "javax.xml.transform.TransformerFactory"; | |
| 108 final String workaroundParser = | |
| 109 "org.apache.xalan.processor.TransformerFactoryImpl"; | |
| 110 | |
| 111 try { | |
| 112 java.lang.Class cls = java.lang.Class.forName(workaroundParser); | |
| 113 /* | |
| 114 * If we get here, we found the class. Use it. | |
| 115 */ | |
| 116 System.setProperty(parserProperty, workaroundParser); | |
| 117 System.out.println("Info: jvmtiGen using " + parserProperty + | |
| 118 " = " + workaroundParser); | |
| 119 } catch (ClassNotFoundException cnfex) { | |
| 120 /* | |
| 121 * We didn't find workaroundParser. Ignore the | |
| 122 * exception and proceed with default settings. | |
| 123 */ | |
| 124 } | |
| 125 | |
| 126 DocumentBuilderFactory factory = | |
| 127 DocumentBuilderFactory.newInstance(); | |
| 128 | |
| 129 factory.setNamespaceAware(true); | |
| 130 factory.setValidating(true); | |
| 10405 | 131 factory.setXIncludeAware(true); |
| 0 | 132 |
| 133 try { | |
| 134 File datafile = new File(inFileName); | |
| 135 File stylesheet = new File(xslFileName); | |
| 136 | |
| 137 DocumentBuilder builder = factory.newDocumentBuilder(); | |
| 138 document = builder.parse(datafile); | |
| 139 | |
| 140 // Use a Transformer for output | |
| 141 TransformerFactory tFactory = | |
| 142 TransformerFactory.newInstance(); | |
| 143 StreamSource stylesource = new StreamSource(stylesheet); | |
| 144 Transformer transformer = tFactory.newTransformer(stylesource); | |
| 145 for (int ii = 0; ii < params.size(); ii += 2){ | |
| 146 transformer.setParameter((String) params.elementAt(ii), | |
| 147 (String) params.elementAt(ii + 1)); | |
| 148 } | |
| 149 DOMSource source = new DOMSource(document); | |
| 150 | |
| 151 PrintStream ps = new PrintStream( new FileOutputStream(outFileName)); | |
| 152 StreamResult result = new StreamResult(ps); | |
| 153 transformer.transform(source, result); | |
| 154 | |
| 155 } catch (TransformerConfigurationException tce) { | |
| 156 // Error generated by the parser | |
| 157 System.out.println ("\n** Transformer Factory error"); | |
| 158 System.out.println(" " + tce.getMessage() ); | |
| 159 | |
| 160 // Use the contained exception, if any | |
| 161 Throwable x = tce; | |
| 162 if (tce.getException() != null) | |
| 163 x = tce.getException(); | |
| 164 x.printStackTrace(); | |
| 165 | |
| 166 } catch (TransformerException te) { | |
| 167 // Error generated by the parser | |
| 168 System.out.println ("\n** Transformation error"); | |
| 169 System.out.println(" " + te.getMessage() ); | |
| 170 | |
| 171 // Use the contained exception, if any | |
| 172 Throwable x = te; | |
| 173 if (te.getException() != null) | |
| 174 x = te.getException(); | |
| 175 x.printStackTrace(); | |
| 176 | |
| 177 } catch (SAXException sxe) { | |
| 178 // Error generated by this application | |
| 179 // (or a parser-initialization error) | |
| 180 Exception x = sxe; | |
| 181 if (sxe.getException() != null) | |
| 182 x = sxe.getException(); | |
| 183 x.printStackTrace(); | |
| 184 | |
| 185 } catch (ParserConfigurationException pce) { | |
| 186 // Parser with specified options can't be built | |
| 187 pce.printStackTrace(); | |
| 188 | |
| 189 } catch (IOException ioe) { | |
| 190 // I/O error | |
| 191 ioe.printStackTrace(); | |
| 192 } | |
| 193 } // main | |
| 194 } |