| // Copyright (c) 2017, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| /// An entrypoint used to run portions of fasta and measure its performance. |
| library front_end.tool.fasta_perf; |
| |
| import 'dart:async'; |
| import 'dart:io'; |
| |
| import 'package:analyzer/src/fasta/ast_builder.dart'; |
| import 'package:front_end/src/fasta/dill/dill_target.dart' show DillTarget; |
| import 'package:front_end/src/fasta/kernel/kernel_target.dart' |
| show KernelTarget; |
| import 'package:front_end/src/fasta/parser.dart'; |
| import 'package:front_end/src/fasta/source/directive_listener.dart'; |
| import 'package:front_end/src/fasta/scanner.dart'; |
| import 'package:front_end/src/fasta/scanner/io.dart' show readBytesFromFileSync; |
| import 'package:front_end/src/fasta/ticker.dart' show Ticker; |
| import 'package:front_end/src/fasta/translate_uri.dart' show TranslateUri; |
| import 'package:front_end/src/fasta/translate_uri.dart'; |
| |
| /// Cumulative total number of chars scanned. |
| int inputSize = 0; |
| |
| /// Cumulative time spent scanning. |
| Stopwatch scanTimer = new Stopwatch(); |
| |
| main(List<String> args) async { |
| // TODO(sigmund): provide sdk folder as well. |
| if (args.length < 2) { |
| print('usage: fasta_perf.dart <bench-id> <entry.dart>'); |
| exit(1); |
| } |
| var bench = args[0]; |
| var entryUri = Uri.base.resolve(args[1]); |
| |
| await setup(entryUri); |
| |
| Map<Uri, List<int>> files = await scanReachableFiles(entryUri); |
| var handlers = { |
| 'scan': () async => scanFiles(files), |
| // TODO(sigmund): enable when we can run the ast-builder standalone. |
| // 'parse': () async => parseFiles(files), |
| 'kernel_gen_e2e': () async { |
| await generateKernel(entryUri); |
| }, |
| // TODO(sigmund): enable once we add a build step to create the |
| // platform.dill files. |
| // 'kernel_gen_e2e_sum': () async { |
| // await generateKernel(entryUri, compileSdk: false); |
| // }, |
| }; |
| |
| var handler = handlers[bench]; |
| if (handler == null) { |
| // TODO(sigmund): implement the remaining benchmarks. |
| print('unsupported bench-id: $bench. Please specify one of the following: ' |
| '${handlers.keys.join(", ")}'); |
| exit(1); |
| } |
| |
| // TODO(sigmund): replace the warmup with instrumented snapshots. |
| int iterations = bench.contains('kernel_gen') ? 2 : 10; |
| for (int i = 0; i < iterations; i++) { |
| var totalTimer = new Stopwatch()..start(); |
| print('== iteration $i'); |
| await handler(); |
| totalTimer.stop(); |
| report('total', totalTimer.elapsedMicroseconds); |
| } |
| } |
| |
| /// Translates `dart:*` and `package:*` URIs to resolved URIs. |
| TranslateUri uriResolver; |
| |
| /// Preliminary set up to be able to correctly resolve URIs on the given |
| /// program. |
| Future setup(Uri entryUri) async { |
| // TODO(sigmund): use `perf.dart::_findSdkPath` here when fasta can patch the |
| // sdk directly. |
| var sdkRoot = |
| Uri.base.resolve(Platform.resolvedExecutable).resolve('patched_sdk/'); |
| uriResolver = await TranslateUri.parse(sdkRoot); |
| } |
| |
| /// Scan [contents] and return the first token produced by the scanner. |
| Token tokenize(List<int> contents) { |
| scanTimer.start(); |
| var token = scan(contents).tokens; |
| scanTimer.stop(); |
| return token; |
| } |
| |
| /// Scans every file in [files] and reports the time spent doing so. |
| void scanFiles(Map<Uri, List<int>> files) { |
| scanTimer = new Stopwatch(); |
| for (var source in files.values) { |
| tokenize(source); |
| } |
| report('scan', scanTimer.elapsedMicroseconds); |
| } |
| |
| /// Load and scans all files we need to process: files reachable from the |
| /// entrypoint and all core libraries automatically included by the VM. |
| Future<Map<Uri, List<int>>> scanReachableFiles(Uri entryUri) async { |
| var files = <Uri, List<int>>{}; |
| var loadTimer = new Stopwatch()..start(); |
| scanTimer = new Stopwatch(); |
| var entrypoints = [ |
| entryUri, |
| // These extra libraries are added to match the same set of libraries |
| // scanned by default by the VM and the other benchmarks. |
| Uri.parse('dart:async'), |
| Uri.parse('dart:collection'), |
| Uri.parse('dart:convert'), |
| Uri.parse('dart:core'), |
| Uri.parse('dart:developer'), |
| Uri.parse('dart:_internal'), |
| Uri.parse('dart:io'), |
| Uri.parse('dart:isolate'), |
| Uri.parse('dart:math'), |
| Uri.parse('dart:mirrors'), |
| Uri.parse('dart:typed_data'), |
| ]; |
| for (var entry in entrypoints) { |
| await collectSources(entry, files); |
| } |
| loadTimer.stop(); |
| |
| inputSize = 0; |
| // adjust size because there is a null-terminator on the contents. |
| for (var source in files.values) inputSize += (source.length - 1); |
| print('input size: $inputSize chars'); |
| var loadTime = loadTimer.elapsedMicroseconds - scanTimer.elapsedMicroseconds; |
| report('load', loadTime); |
| report('scan', scanTimer.elapsedMicroseconds); |
| return files; |
| } |
| |
| /// Add to [files] all sources reachable from [start]. |
| Future<Null> collectSources(Uri start, Map<Uri, List<int>> files) async { |
| helper(Uri uri) { |
| uri = uriResolver.translate(uri) ?? uri; |
| if (uri == null) return; |
| if (files.containsKey(uri)) return; |
| var contents = readBytesFromFileSync(uri); |
| files[uri] = contents; |
| for (var directiveUri in extractDirectiveUris(contents)) { |
| helper(uri.resolve(directiveUri)); |
| } |
| } |
| |
| helper(start); |
| } |
| |
| /// Parse [contents] as a Dart program and return the URIs that appear in its |
| /// import, export, and part directives. |
| Set<String> extractDirectiveUris(List<int> contents) { |
| var listener = new DirectiveListener(acceptsNativeClause: true); |
| new TopLevelParser(listener).parseUnit(tokenize(contents)); |
| return new Set<String>() |
| ..addAll(listener.imports) |
| ..addAll(listener.exports) |
| ..addAll(listener.parts); |
| } |
| |
| /// Parses every file in [files] and reports the time spent doing so. |
| void parseFiles(Map<Uri, List<int>> files) { |
| scanTimer = new Stopwatch(); |
| var parseTimer = new Stopwatch()..start(); |
| files.forEach((uri, source) { |
| parseFull(uri, source); |
| }); |
| parseTimer.stop(); |
| |
| report('scan', scanTimer.elapsedMicroseconds); |
| report( |
| 'parse', parseTimer.elapsedMicroseconds - scanTimer.elapsedMicroseconds); |
| } |
| |
| /// Parse the full body of [source]. |
| parseFull(Uri uri, List<int> source) { |
| var tokens = tokenize(source); |
| Parser parser = new Parser(new _PartialAstBuilder(uri)); |
| parser.parseUnit(tokens); |
| } |
| |
| // Note: AstBuilder doesn't build compilation-units or classes, only method |
| // bodies. So this listener is not feature complete. |
| class _PartialAstBuilder extends AstBuilder { |
| _PartialAstBuilder(Uri uri) : super(null, null, null, null, null, uri); |
| |
| // Note: this method converts the body to kernel, so we skip that here. |
| @override |
| finishFunction(formals, asyncModifier, body) {} |
| } |
| |
| // Invoke the fasta kernel generator for the program starting in [entryUri] |
| // TODO(sigmund): update to uyse the frontend api once fasta is beind hit. |
| generateKernel(Uri entryUri, |
| {bool compileSdk: true, bool strongMode: false}) async { |
| // TODO(sigmund): this is here only to compute the input size, |
| // we should extract the input size from the frontend instead. |
| scanReachableFiles(entryUri); |
| |
| var timer = new Stopwatch()..start(); |
| final Ticker ticker = new Ticker(); |
| final DillTarget dillTarget = new DillTarget(ticker, uriResolver); |
| final KernelTarget kernelTarget = |
| new KernelTarget(dillTarget, uriResolver, strongMode); |
| var entrypoints = [ |
| entryUri, |
| // These extra libraries are added to match the same set of libraries |
| // scanned by default by the VM and the other benchmarks. |
| Uri.parse('dart:async'), |
| Uri.parse('dart:collection'), |
| Uri.parse('dart:convert'), |
| Uri.parse('dart:core'), |
| Uri.parse('dart:developer'), |
| Uri.parse('dart:_internal'), |
| Uri.parse('dart:io'), |
| Uri.parse('dart:isolate'), |
| Uri.parse('dart:math'), |
| Uri.parse('dart:mirrors'), |
| Uri.parse('dart:typed_data'), |
| ]; |
| entrypoints.forEach(kernelTarget.read); |
| |
| if (!compileSdk) { |
| dillTarget.read( |
| Uri.base.resolve(Platform.resolvedExecutable).resolve('platform.dill')); |
| } |
| await dillTarget.writeOutline(null); |
| var program = await kernelTarget.writeOutline(null); |
| program = await kernelTarget.writeProgram(null); |
| if (kernelTarget.errors.isNotEmpty) { |
| throw kernelTarget.errors.first; |
| } |
| timer.stop(); |
| report('kernel_gen_e2e', timer.elapsedMicroseconds); |
| return program; |
| } |
| |
| /// Report that metric [name] took [time] micro-seconds to process |
| /// [inputSize] characters. |
| void report(String name, int time) { |
| var sb = new StringBuffer(); |
| var padding = ' ' * (20 - name.length); |
| sb.write('$name:$padding $time us, ${time ~/ 1000} ms'); |
| var invSpeed = (time * 1000 / inputSize).toStringAsFixed(2); |
| sb.write(', $invSpeed ns/char'); |
| print('$sb'); |
| } |