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| 1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file | |
| 2 // for details. All rights reserved. Use of this source code is governed by a | |
| 3 // BSD-style license that can be found in the LICENSE file. | |
| 4 | |
| 5 // Print a summary of a profile trace. | |
| 6 | |
| 7 import 'dart:convert'; | |
| 8 import 'dart:io'; | |
| 9 | |
| 10 class TraceSymbol { | |
| 11 final String name; | |
| 12 int exclusive = 0; | |
| 13 int inclusive = 0; | |
| 14 TraceSymbol(this.name); | |
| 15 } | |
| 16 | |
| 17 class TraceSummary { | |
| 18 final int numSymbols; | |
| 19 | |
| 20 Map<String, TraceSymbol> _symbols = {}; | |
| 21 List _events = []; | |
| 22 List<TraceSymbol> _stack = []; | |
| 23 List<TraceSymbol> _topExclusive = []; | |
| 24 List<TraceSymbol> _topInclusive = []; | |
| 25 bool _marked = false; | |
| 26 int _totalSamples = 0; | |
| 27 | |
| 28 TraceSummary(this.numSymbols); | |
| 29 | |
| 30 void _processEventsFromFile(String name) { | |
| 31 var file = new File(name); | |
| 32 var events = []; | |
| 33 try { | |
| 34 var contents = file.readAsStringSync(); | |
| 35 events = JSON.decode(contents); | |
| 36 } catch (e) { | |
| 37 print('Exception for $name $e'); | |
| 38 } | |
| 39 _processEvents(events); | |
| 40 } | |
| 41 | |
| 42 void _processBegin(Map event) { | |
| 43 var name = event['name']; | |
| 44 if (name == '<no frame>') { | |
| 45 return; | |
| 46 } | |
| 47 var symbol = _symbols[name]; | |
| 48 if (symbol == null) { | |
| 49 symbol = new TraceSymbol(name); | |
| 50 _symbols[name] = symbol; | |
| 51 } | |
| 52 _stack.add(symbol); | |
| 53 _marked = false; | |
| 54 } | |
| 55 | |
| 56 void _processEnd(Map event) { | |
| 57 var name = event['name']; | |
| 58 if (name == '<no frame>') { | |
| 59 return; | |
| 60 } | |
| 61 var symbol = _stack.last; | |
| 62 if (symbol.name != name) { | |
| 63 throw new StateError('$name not found at top of stack.'); | |
| 64 } | |
| 65 if ((_stack.length > 1) && (_marked == false)) { | |
| 66 // We are transitioning from the sequence of begins to the sequence | |
| 67 // of ends. Mark the symbols on the stack. | |
| 68 _marked = true; | |
| 69 _totalSamples++; | |
| 70 // Mark all symbols except the top with an inclusive tick. | |
| 71 for (int i = 1; i < _stack.length; i++) { | |
| 72 _stack[i].inclusive++; | |
| 73 } | |
| 74 _stack.last.exclusive++; | |
| 75 } | |
| 76 _stack.removeLast(); | |
| 77 } | |
| 78 | |
| 79 void _processEvents(List events) { | |
| 80 for (var i = 0; i < events.length; i++) { | |
| 81 Map event = events[i]; | |
| 82 if (event['ph'] == 'M') { | |
| 83 // Ignore. | |
| 84 } else if (event['ph'] == 'B') { | |
| 85 _processBegin(event); | |
| 86 } else if (event['ph'] == 'E') { | |
| 87 _processEnd(event); | |
| 88 } | |
| 89 } | |
| 90 } | |
| 91 | |
| 92 void _findTopExclusive() { | |
| 93 _topExclusive = _symbols.values.toList(); | |
| 94 _topExclusive.sort((a, b) { | |
| 95 return b.exclusive - a.exclusive; | |
| 96 }); | |
| 97 } | |
| 98 | |
| 99 | |
| 100 void _findTopInclusive() { | |
| 101 _topInclusive = _symbols.values.toList(); | |
| 102 _topInclusive.sort((a, b) { | |
| 103 return b.inclusive - a.inclusive; | |
| 104 }); | |
| 105 } | |
| 106 | |
| 107 void summarize(String input) { | |
| 108 _processEventsFromFile(input); | |
| 109 _findTopExclusive(); | |
| 110 _findTopInclusive(); | |
| 111 _print(); | |
| 112 } | |
| 113 | |
| 114 String _pad(String input, int minLength) { | |
| 115 int length = input.length; | |
| 116 for (int i = 0; i < minLength - length; i++) { | |
| 117 input = ' $input'; | |
| 118 } | |
| 119 return input; | |
| 120 } | |
| 121 | |
| 122 static const TICKS_LENGTH = 10; | |
| 123 static const PERCENT_LENGTH = 7; | |
| 124 | |
| 125 void _printSymbol(int t, String name) { | |
| 126 String ticks = t.toString(); | |
| 127 ticks = _pad(ticks, TICKS_LENGTH); | |
| 128 double total = (t / _totalSamples); | |
| 129 String percent = (total * 100.0).toStringAsFixed(2); | |
| 130 percent = _pad(percent, PERCENT_LENGTH); | |
| 131 print('$ticks $percent $name'); | |
| 132 } | |
| 133 | |
| 134 void _print() { | |
| 135 print('Top ${numSymbols} inclusive symbols'); | |
| 136 print('--------------------------'); | |
| 137 print(' ticks percent name'); | |
| 138 _topInclusive.getRange(0, numSymbols).forEach((a) { | |
| 139 _printSymbol(a.inclusive, a.name); | |
| 140 }); | |
| 141 print(''); | |
| 142 print('Top ${numSymbols} exclusive symbols'); | |
| 143 print('--------------------------'); | |
| 144 print(' ticks percent name'); | |
| 145 _topExclusive.getRange(0, numSymbols).forEach((a) { | |
| 146 _printSymbol(a.exclusive, a.name); | |
| 147 }); | |
| 148 } | |
| 149 } | |
| 150 | |
| 151 main(List<String> arguments) { | |
| 152 if (arguments.length < 1) { | |
| 153 print('${Platform.executable} ${Platform.script} <input> [symbol count]'); | |
| 154 return; | |
| 155 } | |
| 156 String input = arguments[0]; | |
| 157 int numSymbols = 10; | |
| 158 if (arguments.length >= 2) { | |
| 159 numSymbols = int.parse(arguments[1]); | |
| 160 } | |
| 161 TraceSummary ts = new TraceSummary(numSymbols); | |
| 162 ts.summarize(input); | |
| 163 } | |
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