jdk8-mips64-public/langtools: comparison src/share/classes/com/sun/tools/sjavac/CompileJavaPackages.java

-:2d2b2be57c78
+:22e417cdddee
+/*
+* Copyright (c) 2012, 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.  Oracle designates this
+* particular file as subject to the "Classpath" exception as provided
+* by Oracle in the LICENSE file that accompanied this code.
+*
+* 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.
+*/
+package com.sun.tools.sjavac;
+import java.net.URI;
+import java.util.Arrays;
+import java.util.Random;
+import java.util.Set;
+import java.util.Map;
+import com.sun.tools.sjavac.server.JavacServer;
+import com.sun.tools.sjavac.server.SysInfo;
+import java.io.PrintStream;
+/**
+* This transform compiles a set of packages containing Java sources.
+* The compile request is divided into separate sets of source files.
+* For each set a separate request thread is dispatched to a javac server
+* and the meta data is accumulated. The number of sets correspond more or
+* less to the number of cores. Less so now, than it will in the future.
+*
+* <p><b>This is NOT part of any supported API.
+* If you write code that depends on this, you do so at your own
+* risk.  This code and its internal interfaces are subject to change
+* or deletion without notice.</b></p>
+*/
+public class CompileJavaPackages implements Transformer {
+// The current limited sharing of data between concurrent JavaCompilers
+// in the server will not give speedups above 3 cores. Thus this limit.
+// We hope to improve this in the future.
+final static int limitOnConcurrency = 3;
+String serverSettings;
+public void setExtra(String e) {
+serverSettings = e;
+}
+String[] args;
+public void setExtra(String[] a) {
+args = a;
+}
+public boolean transform(Map<String,Set<URI>> pkgSrcs,
+Set<URI>             visibleSources,
+Map<URI,Set<String>> visibleClasses,
+Map<String,Set<String>> oldPackageDependents,
+URI destRoot,
+final Map<String,Set<URI>>    packageArtifacts,
+final Map<String,Set<String>> packageDependencies,
+final Map<String,String>      packagePubapis,
+int debugLevel,
+boolean incremental,
+int numCores,
+PrintStream out,
+PrintStream err)
+{
+boolean rc = true;
+boolean concurrentCompiles = true;
+// Fetch the id.
+String id = Util.extractStringOption("id", serverSettings);
+if (id == null || id.equals("")) {
+// No explicit id set. Create a random id so that the requests can be
+// grouped properly in the server.
+id = "id"+(((new Random()).nextLong())&Long.MAX_VALUE);
+}
+// Only keep portfile and sjavac settings..
+String psServerSettings = Util.cleanSubOptions("--server:", Util.set("portfile","sjavac","background","keepalive"), serverSettings);
+// Get maximum heap size from the server!
+SysInfo sysinfo = JavacServer.connectGetSysInfo(psServerSettings, out, err);
+if (sysinfo.numCores == -1) {
+Log.error("Could not query server for sysinfo!");
+return false;
+}
+int numMBytes = (int)(sysinfo.maxMemory / ((long)(1024*1024)));
+Log.debug("Server reports "+numMBytes+"MiB of memory and "+sysinfo.numCores+" cores");
+if (numCores <= 0) {
+// Set the requested number of cores to the number of cores on the server.
+numCores = sysinfo.numCores;
+Log.debug("Number of jobs not explicitly set, defaulting to "+sysinfo.numCores);
+} else if (sysinfo.numCores < numCores) {
+// Set the requested number of cores to the number of cores on the server.
+Log.debug("Limiting jobs from explicitly set "+numCores+" to cores available on server: "+sysinfo.numCores);
+numCores = sysinfo.numCores;
+} else {
+Log.debug("Number of jobs explicitly set to "+numCores);
+}
+// More than three concurrent cores does not currently give a speedup, at least for compiling the jdk
+// in the OpenJDK. This will change in the future.
+int numCompiles = numCores;
+if (numCores > limitOnConcurrency) numCompiles = limitOnConcurrency;
+// Split the work up in chunks to compiled.
+int numSources = 0;
+for (String s : pkgSrcs.keySet()) {
+Set<URI> ss = pkgSrcs.get(s);
+numSources += ss.size();
+}
+int sourcesPerCompile = numSources / numCompiles;
+// For 64 bit Java, it seems we can compile the OpenJDK 8800 files with a 1500M of heap
+// in a single chunk, with reasonable performance.
+// For 32 bit java, it seems we need 1G of heap.
+// Number experimentally determined when compiling the OpenJDK.
+// Includes space for reasonably efficient garbage collection etc,
+// Calculating backwards gives us a requirement of
+// 1500M/8800 = 175 KiB for 64 bit platforms
+// and 1G/8800 = 119 KiB for 32 bit platform
+// for each compile.....
+int kbPerFile = 175;
+String osarch = System.getProperty("os.arch");
+if (osarch.equals("i386")) {
+// For 32 bit platforms, assume it is slightly smaller
+// because of smaller object headers and pointers.
+kbPerFile = 119;
+}
+int numRequiredMBytes = (kbPerFile*numSources)/1024;
+Log.debug("For os.arch "+osarch+" the empirically determined heap required per file is "+kbPerFile+"KiB");
+Log.debug("Server has "+numMBytes+"MiB of heap.");
+Log.debug("Heuristics say that we need "+numRequiredMBytes+"MiB of heap for all source files.");
+// Perform heuristics to see how many cores we can use,
+// or if we have to the work serially in smaller chunks.
+if (numMBytes < numRequiredMBytes) {
+// Ouch, cannot fit even a single compile into the heap.
+// Split it up into several serial chunks.
+concurrentCompiles = false;
+// Limit the number of sources for each compile to 500.
+if (numSources < 500) {
+numCompiles = 1;
+sourcesPerCompile = numSources;
+Log.debug("Compiling as a single source code chunk to stay within heap size limitations!");
+} else if (sourcesPerCompile > 500) {
+// This number is very low, and tuned to dealing with the OpenJDK
+// where the source is >very< circular! In normal application,
+// with less circularity the number could perhaps be increased.
+numCompiles = numSources / 500;
+sourcesPerCompile = numSources/numCompiles;
+Log.debug("Compiling source as "+numCompiles+" code chunks serially to stay within heap size limitations!");
+}
+} else {
+if (numCompiles > 1) {
+// Ok, we can fit at least one full compilation on the heap.
+float usagePerCompile = (float)numRequiredMBytes / ((float)numCompiles * (float)0.7);
+int usage = (int)(usagePerCompile * (float)numCompiles);
+Log.debug("Heuristics say that for "+numCompiles+" concurrent compiles we need "+usage+"MiB");
+if (usage > numMBytes) {
+// Ouch it does not fit. Reduce to a single chunk.
+numCompiles = 1;
+sourcesPerCompile = numSources;
+// What if the relationship betweem number of compile_chunks and num_required_mbytes
+// is not linear? Then perhaps 2 chunks would fit where 3 does not. Well, this is
+// something to experiment upon in the future.
+Log.debug("Limiting compile to a single thread to stay within heap size limitations!");
+}
+}
+}
+Log.debug("Compiling sources in "+numCompiles+" chunk(s)");
+// Create the chunks to be compiled.
+final CompileChunk[] compileChunks = createCompileChunks(pkgSrcs, oldPackageDependents,
+numCompiles, sourcesPerCompile);
+if (Log.isDebugging()) {
+int cn = 1;
+for (CompileChunk cc : compileChunks) {
+Log.debug("Chunk "+cn+" for "+id+" ---------------");
+cn++;
+for (URI u : cc.srcs) {
+Log.debug(""+u);
+}
+}
+}
+// The return values for each chunked compile.
+final int[] rn = new int[numCompiles];
+// The requets, might or might not run as a background thread.
+final Thread[] requests  = new Thread[numCompiles];
+final Set<URI>             fvisible_sources = visibleSources;
+final Map<URI,Set<String>> fvisible_classes = visibleClasses;
+long start = System.currentTimeMillis();
+for (int i=0; i<numCompiles; ++i) {
+final int ii = i;
+final CompileChunk cc = compileChunks[i];
+// Pass the num_cores and the id (appended with the chunk number) to the server.
+final String cleanedServerSettings = psServerSettings+",poolsize="+numCores+",id="+id+"-"+ii;
+final PrintStream fout = out;
+final PrintStream ferr = err;
+requests[ii] = new Thread() {
+@Override
+public void run() {
+rn[ii] = JavacServer.useServer(cleanedServerSettings,
+Main.removeWrapperArgs(args),
+cc.srcs,
+fvisible_sources,
+fvisible_classes,
+packageArtifacts,
+packageDependencies,
+packagePubapis,
+null,
+fout, ferr);
+}
+};
+if (cc.srcs.size() > 0) {
+String numdeps = "";
+if (cc.numDependents > 0) numdeps = "(with "+cc.numDependents+" dependents) ";
+if (!incremental || cc.numPackages > 16) {
+String info = "("+cc.pkgFromTos+")";
+if (info.equals("( to )")) {
+info = "";
+}
+Log.info("Compiling "+cc.srcs.size()+" files "+numdeps+"in "+cc.numPackages+" packages "+info);
+} else {
+Log.info("Compiling "+cc.pkgNames+numdeps);
+}
+if (concurrentCompiles) {
+requests[ii].start();
+}
+else {
+requests[ii].run();
+// If there was an error, then stop early when running single threaded.
+if (rn[i] != 0) {
+return false;
+}
+}
+}
+}
+if (concurrentCompiles) {
+// If there are background threads for the concurrent compiles, then join them.
+for (int i=0; i<numCompiles; ++i) {
+try { requests[i].join(); } catch (InterruptedException e) { }
+}
+}
+// Check the return values.
+for (int i=0; i<numCompiles; ++i) {
+if (compileChunks[i].srcs.size() > 0) {
+if (rn[i] != 0) {
+rc = false;
+}
+}
+}
+long duration = System.currentTimeMillis() - start;
+long minutes = duration/60000;
+long seconds = (duration-minutes*60000)/1000;
+Log.debug("Compilation of "+numSources+" source files took "+minutes+"m "+seconds+"s");
+return rc;
+}
+/**
+* Split up the sources into compile chunks. If old package dependents information
+* is available, sort the order of the chunks into the most dependent first!
+* (Typically that chunk contains the java.lang package.) In the future
+* we could perhaps improve the heuristics to put the sources into even more sensible chunks.
+* Now the package are simple sorted in alphabetical order and chunked, then the chunks
+* are sorted on how dependent they are.
+*
+* @param pkgSrcs The sources to compile.
+* @param oldPackageDependents Old package dependents, if non-empty, used to sort the chunks.
+* @param numCompiles The number of chunks.
+* @param sourcesPerCompile The number of sources per chunk.
+* @return
+*/
+CompileChunk[] createCompileChunks(Map<String,Set<URI>> pkgSrcs,
+Map<String,Set<String>> oldPackageDependents,
+int numCompiles,
+int sourcesPerCompile) {
+CompileChunk[] compileChunks = new CompileChunk[numCompiles];
+for (int i=0; i<compileChunks.length; ++i) {
+compileChunks[i] = new CompileChunk();
+}
+// Now go through the packages and spread out the source on the different chunks.
+int ci = 0;
+// Sort the packages
+String[] packageNames = pkgSrcs.keySet().toArray(new String[0]);
+Arrays.sort(packageNames);
+String from = null;
+for (String pkgName : packageNames) {
+CompileChunk cc = compileChunks[ci];
+Set<URI> s = pkgSrcs.get(pkgName);
+if (cc.srcs.size()+s.size() > sourcesPerCompile && ci < numCompiles-1) {
+from = null;
+ci++;
+cc = compileChunks[ci];
+}
+cc.numPackages++;
+cc.srcs.addAll(s);
+// Calculate nice package names to use as information when compiling.
+String justPkgName = Util.justPackageName(pkgName);
+// Fetch how many packages depend on this package from the old build state.
+Set<String> ss = oldPackageDependents.get(pkgName);
+if (ss != null) {
+// Accumulate this information onto this chunk.
+cc.numDependents += ss.size();
+}
+if (from == null || from.trim().equals("")) from = justPkgName;
+cc.pkgNames.append(justPkgName+"("+s.size()+") ");
+cc.pkgFromTos = from+" to "+justPkgName;
+}
+// If we are compiling serially, sort the chunks, so that the chunk (with the most dependents) (usually the chunk
+// containing java.lang.Object, is to be compiled first!
+// For concurrent compilation, this does not matter.
+Arrays.sort(compileChunks);
+return compileChunks;
+}
+}

Mercurial > jdk8-mips64-public > langtools / file comparison

comparison: src/share/classes/com/sun/tools/sjavac/CompileJavaPackages.java

src/share/classes/com/sun/tools/sjavac/CompileJavaPackages.java