1 <!DOCTYPE html> 2 <!-- 3 Copyright 2015 The Chromium Authors. All rights reserved. 4 Use of this source code is governed by a BSD-style license that can be 5 found in the LICENSE file. 6 --> 7 8 <link rel="import" href="/tracing/base/range.html"> 9 <link rel="import" href="/tracing/base/unit.html"> 10 <link rel="import" href="/tracing/mre/function_handle.html"> 11 <link rel="import" href="/tracing/value/histogram.html"> 12 13 <script> 14 'use strict'; 15 16 tr.exportTo('pi.m', function() { 17 var COUNT_BOUNDARIES = tr.v.HistogramBinBoundaries.createLinear(0, 5e4, 20); 18 19 function traceStatsFunction(result, model) { 20 var canonicalUrl = model.canonicalUrl; 21 var eventCount = 0; 22 var firstTime = Number.MAX_VALUE; 23 var lastTime = 0; 24 var categories = {}; 25 26 var seconds_counts = {}; 27 for (var event of model.getDescendantEvents()) { 28 eventCount += 1; 29 if (event.start < firstTime) 30 firstTime = event.start; 31 32 var eventEnd = event.start + event.duration; 33 if (eventEnd > lastTime) 34 lastTime = eventEnd; 35 36 if (categories[event.category] === undefined) 37 categories[event.category] = 0; 38 39 categories[event.category]++; 40 41 var second = Math.round(event.start / 1000); 42 if (seconds_counts[second] === undefined) 43 seconds_counts[second] = 0; 44 45 seconds_counts[second]++; 46 } 47 48 var histogram = new tr.v.Histogram( 49 tr.b.Unit.byName.count, COUNT_BOUNDARIES); 50 51 for (var second in seconds_counts) 52 histogram.add(seconds_counts[second]); 53 54 var stats = { 55 totalEvents: eventCount, 56 firstTimeInMS: firstTime, 57 lastTimeInMS: lastTime, 58 durationInMS: lastTime - firstTime, 59 eventsPerSecond: eventCount / (lastTime - firstTime) * 1000, 60 categories: categories, 61 events_seconds: histogram.asDict() 62 }; 63 64 result.addPair('stats', stats); 65 } 66 67 tr.mre.FunctionRegistry.register(traceStatsFunction); 68 69 //Exporting for tests. 70 return { 71 traceStatsFunctionForTest: traceStatsFunction 72 }; 73 }); 74 </script> 75
