diff options
Diffstat (limited to 'tools/preload/WritePreloadedClassFile.java')
-rw-r--r-- | tools/preload/WritePreloadedClassFile.java | 94 |
1 files changed, 53 insertions, 41 deletions
diff --git a/tools/preload/WritePreloadedClassFile.java b/tools/preload/WritePreloadedClassFile.java index d87b1f0..b209af0 100644 --- a/tools/preload/WritePreloadedClassFile.java +++ b/tools/preload/WritePreloadedClassFile.java @@ -20,8 +20,6 @@ import java.io.IOException; import java.io.OutputStreamWriter; import java.io.Writer; import java.nio.charset.Charset; -import java.util.ArrayList; -import java.util.List; import java.util.Set; import java.util.TreeSet; @@ -32,71 +30,85 @@ import java.util.TreeSet; public class WritePreloadedClassFile { public static void main(String[] args) throws IOException, ClassNotFoundException { - - // Process command-line arguments first - List<String> wiredProcesses = new ArrayList<String>(); - String inputFileName = null; - int argOffset = 0; - try { - while ("--preload-all-process".equals(args[argOffset])) { - argOffset++; - wiredProcesses.add(args[argOffset++]); - } - - inputFileName = args[argOffset++]; - } catch (RuntimeException e) { - System.err.println("Usage: WritePreloadedClassFile " + - "[--preload-all-process process-name] " + - "[compiled log file]"); - System.exit(0); + if (args.length != 1) { + System.err.println("Usage: WritePreloadedClassFile [compiled log]"); + System.exit(-1); } + String rootFile = args[0]; + Root root = Root.fromFile(rootFile); - Root root = Root.fromFile(inputFileName); - + // 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.getPreloadedClassFileName()), 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.\n"); - out.write("# percent=" + Proc.PERCENTAGE_TO_PRELOAD + ", weight=" - + ClassRank.SEQUENCE_WEIGHT + out.write("# percent=" + Proc.PERCENTAGE_TO_PRELOAD + + ", weight=" + ClassRank.SEQUENCE_WEIGHT + ", bucket_size=" + ClassRank.BUCKET_SIZE + "\n"); - for (String wiredProcess : wiredProcesses) { - out.write("# forcing classes loaded by: " + wiredProcess + "\n"); - } - Set<LoadedClass> highestRanked = new TreeSet<LoadedClass>(); - for (Proc proc : root.processes.values()) { - // test to see if this is one of the wired-down ("take all classes") processes - boolean isWired = wiredProcesses.contains(proc.name); - - List<LoadedClass> highestForProc = proc.highestRankedClasses(isWired); + Set<LoadedClass> toPreload = new TreeSet<LoadedClass>(); + + // Preload all classes that were loaded by at least 2 apps, if both + // apps run at the same time, they'll share memory. + for (LoadedClass loadedClass : root.loadedClasses.values()) { + if (!loadedClass.isPreloadable()) { + continue; + } - System.out.println(proc.name + ": " + highestForProc.size()); + Set<String> appNames = loadedClass.applicationNames(); - for (LoadedClass loadedClass : highestForProc) { - loadedClass.preloaded = true; + if (appNames.size() > 3) { + toPreload.add(loadedClass); } - highestRanked.addAll(highestForProc); } - for (LoadedClass loadedClass : highestRanked) { + // Try to make individual apps start faster by preloading slowest + // classes. + for (Proc proc : root.processes.values()) { + toPreload.addAll(proc.highestRankedClasses()); + } + + System.out.println(toPreload.size() + " classes will be preloaded."); + + // Make classes that were already loaded by the zygote explicit. + // This adds minimal overhead but avoid confusion about classes not + // appearing in the list. + addAllClassesFor("zygote", root, toPreload); + + for (LoadedClass loadedClass : toPreload) { out.write(loadedClass.name); out.write('\n'); } out.close(); - System.out.println(highestRanked.size() - + " classes will be preloaded."); - // Update data to reflect LoadedClass.preloaded changes. - root.toFile(inputFileName); + for (LoadedClass loadedClass : toPreload) { + loadedClass.preloaded = true; + } + root.toFile(rootFile); + } + + private static void addAllClassesFor(String packageName, Root root, + Set<LoadedClass> toPreload) { + for (Proc proc : root.processes.values()) { + if (proc.name.equals(packageName)) { + for (Operation operation : proc.operations) { + // TODO: I'm not sure how the zygote loaded classes that + // aren't supposed to be preloadable... + if (operation.loadedClass.isPreloadable()) { + toPreload.add(operation.loadedClass); + } + } + } + } } } |