Mercurial > hg > graal-compiler
view src/share/vm/prims/jvmtiGen.java @ 2149:7e37af9d69ef
7011379: G1: overly long concurrent marking cycles
Summary: This changeset introduces filtering of SATB buffers at the point when they are about to be enqueued. If this filtering clears enough entries on each buffer, the buffer can then be re-used and not enqueued. This cuts down the number of SATB buffers that need to be processed by the concurrent marking threads.
Reviewed-by: johnc, ysr
author | tonyp |
---|---|
date | Wed, 19 Jan 2011 09:35:17 -0500 |
parents | c18cbe5936b8 |
children | f2110083203d |
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/* * Copyright (c) 2003, 2005, 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 * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ import javax.xml.parsers.DocumentBuilder; import javax.xml.parsers.DocumentBuilderFactory; import javax.xml.parsers.FactoryConfigurationError; import javax.xml.parsers.ParserConfigurationException; import org.xml.sax.SAXException; import org.xml.sax.SAXParseException; import org.w3c.dom.Document; import org.w3c.dom.DOMException; // For write operation import javax.xml.transform.Transformer; import javax.xml.transform.TransformerException; import javax.xml.transform.TransformerFactory; import javax.xml.transform.TransformerConfigurationException; import javax.xml.transform.dom.DOMSource; import javax.xml.transform.stream.StreamSource; import javax.xml.transform.stream.StreamResult; import java.io.*; public class jvmtiGen { /** * Write out usage and exit. */ private static void showUsage() { System.err.println("usage:"); System.err.println(" java jvmtiGen " + "-IN <input XML file name> " + "-XSL <XSL file> " + "-OUT <output file name> " + "[-PARAM <name> <expression> ...]"); System.exit(0); // There is no returning from showUsage() } // Global value so it can be ref'd by the tree-adapter static Document document; public static void main (String argv []) { String inFileName=null; String xslFileName=null; String outFileName=null; java.util.Vector<String> params=new java.util.Vector<String>(); for (int ii = 0; ii < argv.length; ii++) { if (argv[ii].equals("-IN")) { inFileName = argv[++ii]; } else if (argv[ii].equals("-XSL")) { xslFileName = argv[++ii]; } else if (argv[ii].equals("-OUT")) { outFileName = argv[++ii]; } else if (argv[ii].equals("-PARAM")) { if (ii + 2 < argv.length) { String name = argv[++ii]; params.addElement(name); String expression = argv[++ii]; params.addElement(expression); } else { showUsage(); } } else { showUsage(); } } if (inFileName==null || xslFileName==null || outFileName==null){ showUsage(); } /* * Due to JAXP breakage in some intermediate Tiger builds, the * com.sun.org.apache..... parser may throw an exception: * com.sun.org.apache.xml.internal.utils.WrappedRuntimeException: * org.apache.xalan.serialize.SerializerToText * * To work around the problem, this program uses the * org.apache.xalan.... version if it is available. It is * available in J2SE 1.4.x and early builds of 1.5 (Tiger). * It was removed at the same time the thrown exception issue * above was fixed, so if the class is not found we can proceed * and use the default parser. */ final String parserProperty = "javax.xml.transform.TransformerFactory"; final String workaroundParser = "org.apache.xalan.processor.TransformerFactoryImpl"; try { java.lang.Class cls = java.lang.Class.forName(workaroundParser); /* * If we get here, we found the class. Use it. */ System.setProperty(parserProperty, workaroundParser); System.out.println("Info: jvmtiGen using " + parserProperty + " = " + workaroundParser); } catch (ClassNotFoundException cnfex) { /* * We didn't find workaroundParser. Ignore the * exception and proceed with default settings. */ } DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance(); factory.setNamespaceAware(true); factory.setValidating(true); try { File datafile = new File(inFileName); File stylesheet = new File(xslFileName); DocumentBuilder builder = factory.newDocumentBuilder(); document = builder.parse(datafile); // Use a Transformer for output TransformerFactory tFactory = TransformerFactory.newInstance(); StreamSource stylesource = new StreamSource(stylesheet); Transformer transformer = tFactory.newTransformer(stylesource); for (int ii = 0; ii < params.size(); ii += 2){ transformer.setParameter((String) params.elementAt(ii), (String) params.elementAt(ii + 1)); } DOMSource source = new DOMSource(document); PrintStream ps = new PrintStream( new FileOutputStream(outFileName)); StreamResult result = new StreamResult(ps); transformer.transform(source, result); } catch (TransformerConfigurationException tce) { // Error generated by the parser System.out.println ("\n** Transformer Factory error"); System.out.println(" " + tce.getMessage() ); // Use the contained exception, if any Throwable x = tce; if (tce.getException() != null) x = tce.getException(); x.printStackTrace(); } catch (TransformerException te) { // Error generated by the parser System.out.println ("\n** Transformation error"); System.out.println(" " + te.getMessage() ); // Use the contained exception, if any Throwable x = te; if (te.getException() != null) x = te.getException(); x.printStackTrace(); } catch (SAXException sxe) { // Error generated by this application // (or a parser-initialization error) Exception x = sxe; if (sxe.getException() != null) x = sxe.getException(); x.printStackTrace(); } catch (ParserConfigurationException pce) { // Parser with specified options can't be built pce.printStackTrace(); } catch (IOException ioe) { // I/O error ioe.printStackTrace(); } } // main }