Zach Anderson
b981cbfff8
Also adds a program in pkg/vm/bin/dump_bytecode_ngrams.dart that analyzes the traces. Change-Id: I39c9645ca858195a41e001dab47a7b1398f4b15e Reviewed-on: https://dart-review.googlesource.com/c/83340 Commit-Queue: Zach Anderson <zra@google.com> Reviewed-by: Alexander Markov <alexmarkov@google.com>
66 lines
2.2 KiB
Dart
66 lines
2.2 KiB
Dart
// Copyright (c) 2018, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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import 'dart:io' as io;
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import 'package:args/args.dart' show ArgParser, ArgResults;
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import 'package:vm/bytecode/ngrams.dart';
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final ArgParser _argParser = new ArgParser(allowTrailingOptions: true)
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..addFlag('basic-blocks',
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help: 'Only allow control flow as the last instruction in a window',
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defaultsTo: true)
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..addOption('output',
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abbr: 'o', help: 'Path to output file', defaultsTo: null)
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..addFlag('merge-pushes',
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help: 'Do not distinguish among different kinds of Push opcodes',
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defaultsTo: false)
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..addFlag('sort',
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abbr: 's', help: 'Sort the output by ngram frequency', defaultsTo: true)
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..addOption('threshold',
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abbr: 't', help: 'Minimum ngram count threshold', defaultsTo: "1")
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..addOption('window', abbr: 'w', help: 'Window size', defaultsTo: "3");
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final String _usage = '''
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Usage: dump_bytecode_ngrams [options] input.trace
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Dumps stats about a dynamic bytecode instruction trace produced with the
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Dart VM option --interpreter-trace-file, e.g.:
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\$ dart --enable-interpreter --interpreter-trace-file=trace program.dart
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Options:
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${_argParser.usage}
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''';
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const int _badUsageExitCode = 1;
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int main(List<String> arguments) {
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final ArgResults options = _argParser.parse(arguments);
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if ((options.rest.length != 1) || (options['output'] == null)) {
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print(_usage);
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return _badUsageExitCode;
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}
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final basicBlocks = options['basic-blocks'];
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final input = options.rest.single;
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final output = options['output'];
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final mergePushes = options['merge-pushes'];
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final windowSize = int.parse(options['window']);
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final sort = options['sort'];
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final threshold = int.parse(options['threshold']);
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if (!(new io.File(input).existsSync())) {
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print("The file '$input' does not exist");
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print(_usage);
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return _badUsageExitCode;
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}
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NGramReader nGramReader = new NGramReader(input);
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nGramReader.readAllNGrams(windowSize,
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basicBlocks: basicBlocks, mergePushes: mergePushes);
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nGramReader.writeNGramStats(output, sort: sort, minCount: threshold);
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return 0;
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}
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