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author | Mike Lockwood <lockwood@google.com> | 2013-08-28 09:44:17 -0700 |
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committer | Mike Lockwood <lockwood@google.com> | 2013-08-28 09:44:17 -0700 |
commit | 9f6a119c8aa276432ece4fe2118bd8a3c9b1067e (patch) | |
tree | 1391656f9ad624aa99d4c7d2880d38121801a424 /tools/preload/WritePreloadedClassFile.java | |
parent | 647b6f5ed276bf93d95e5801e5e8af2802ef5fbb (diff) | |
download | frameworks_base-9f6a119c8aa276432ece4fe2118bd8a3c9b1067e.zip frameworks_base-9f6a119c8aa276432ece4fe2118bd8a3c9b1067e.tar.gz frameworks_base-9f6a119c8aa276432ece4fe2118bd8a3c9b1067e.tar.bz2 |
Move frameworks/base/tools/ to frameworks/tools/
Change-Id: I3ffafdab27cc4aca256c3a5806b630795b75d5c8
Diffstat (limited to 'tools/preload/WritePreloadedClassFile.java')
-rw-r--r-- | tools/preload/WritePreloadedClassFile.java | 155 |
1 files changed, 0 insertions, 155 deletions
diff --git a/tools/preload/WritePreloadedClassFile.java b/tools/preload/WritePreloadedClassFile.java deleted file mode 100644 index b067bc2..0000000 --- a/tools/preload/WritePreloadedClassFile.java +++ /dev/null @@ -1,155 +0,0 @@ -/* - * Copyright (C) 2008 The Android Open Source Project - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -import java.io.BufferedWriter; -import java.io.FileOutputStream; -import java.io.IOException; -import java.io.OutputStreamWriter; -import java.io.Writer; -import java.nio.charset.Charset; -import java.util.Set; -import java.util.TreeSet; - -/** - * Writes /frameworks/base/preloaded-classes. Also updates - * {@link LoadedClass#preloaded} fields and writes over compiled log file. - */ -public class WritePreloadedClassFile { - - /** - * Preload any class that take longer to load than MIN_LOAD_TIME_MICROS us. - */ - static final int MIN_LOAD_TIME_MICROS = 1250; - - /** - * Preload any class that was loaded by at least MIN_PROCESSES processes. - */ - static final int MIN_PROCESSES = 10; - - public static void main(String[] args) throws IOException, - ClassNotFoundException { - if (args.length != 1) { - System.err.println("Usage: WritePreloadedClassFile [compiled log]"); - System.exit(-1); - } - String rootFile = args[0]; - Root root = Root.fromFile(rootFile); - - // No classes are preloaded to start. - for (LoadedClass loadedClass : root.loadedClasses.values()) { - loadedClass.preloaded = false; - } - - // Open preloaded-classes file for output. - Writer out = new BufferedWriter(new OutputStreamWriter( - new FileOutputStream(Policy.PRELOADED_CLASS_FILE), - Charset.forName("US-ASCII"))); - - out.write("# Classes which are preloaded by" - + " com.android.internal.os.ZygoteInit.\n"); - out.write("# Automatically generated by frameworks/base/tools/preload/" - + WritePreloadedClassFile.class.getSimpleName() + ".java.\n"); - out.write("# MIN_LOAD_TIME_MICROS=" + MIN_LOAD_TIME_MICROS + "\n"); - out.write("# MIN_PROCESSES=" + MIN_PROCESSES + "\n"); - - /* - * The set of classes to preload. We preload a class if: - * - * a) it's loaded in the bootclasspath (i.e., is a system class) - * b) it takes > MIN_LOAD_TIME_MICROS us to load, and - * c) it's loaded by more than one process, or it's loaded by an - * application (i.e., not a long running service) - */ - Set<LoadedClass> toPreload = new TreeSet<LoadedClass>(); - - // Preload classes that were loaded by at least 2 processes. Hopefully, - // the memory associated with these classes will be shared. - for (LoadedClass loadedClass : root.loadedClasses.values()) { - Set<String> names = loadedClass.processNames(); - if (!Policy.isPreloadable(loadedClass)) { - continue; - } - - if (names.size() >= MIN_PROCESSES || - (loadedClass.medianTimeMicros() > MIN_LOAD_TIME_MICROS && names.size() > 1)) { - toPreload.add(loadedClass); - } - } - - int initialSize = toPreload.size(); - System.out.println(initialSize - + " classses were loaded by more than one app."); - - // Preload eligable classes from applications (not long-running - // services). - for (Proc proc : root.processes.values()) { - if (proc.fromZygote() && !Policy.isService(proc.name)) { - for (Operation operation : proc.operations) { - LoadedClass loadedClass = operation.loadedClass; - if (shouldPreload(loadedClass)) { - toPreload.add(loadedClass); - } - } - } - } - - System.out.println("Added " + (toPreload.size() - initialSize) - + " more to speed up applications."); - - System.out.println(toPreload.size() - + " total classes will be preloaded."); - - // Make classes that were implicitly loaded by the zygote explicit. - // This adds minimal overhead but avoid confusion about classes not - // appearing in the list. - addAllClassesFrom("zygote", root, toPreload); - - for (LoadedClass loadedClass : toPreload) { - out.write(loadedClass.name + "\n"); - } - - out.close(); - - // Update data to reflect LoadedClass.preloaded changes. - for (LoadedClass loadedClass : toPreload) { - loadedClass.preloaded = true; - } - root.toFile(rootFile); - } - - private static void addAllClassesFrom(String processName, Root root, - Set<LoadedClass> toPreload) { - for (Proc proc : root.processes.values()) { - if (proc.name.equals(processName)) { - for (Operation operation : proc.operations) { - boolean preloadable - = Policy.isPreloadable(operation.loadedClass); - if (preloadable) { - toPreload.add(operation.loadedClass); - } - } - } - } - } - - /** - * Returns true if the class should be preloaded. - */ - private static boolean shouldPreload(LoadedClass clazz) { - return Policy.isPreloadable(clazz) - && clazz.medianTimeMicros() > MIN_LOAD_TIME_MICROS; - } -} |