chrome/tools/tracing/trace.html

   1 <!--
   2 Tracing template
   3 ----------------
   4 Test_shell has an optional tracing feature.  It can be enabled by running
   5 with the --enable-tracing option.  Tracing causes events to be dropped into
   6 a trace file during runtime.
   7
   8 This HTML file can be used to render the output from the trace.  You'll need
   9 to rename your trace data to "trace_data.js" in the same directory with this
  10 HTML file, and then you can visualize the trace.
  11
  12 Lots of work remains on this tracing tool; currently development is on hold.
  13
  14 -->
  15
  16 <html>
  17 <head>
  18 <title>
  19 Trace Events
  20 </title>
  21 <style>
  22 body {
  23   font-family: "Courier New";
  24   font-size: 9pt;
  25 }
  26
  27 #header {
  28   position: absolute;
  29   top: 0px;
  30   left: 0px;
  31   border-bottom: 1px dashed black;
  32   background-color: #F0F0F0;
  33   z-index: 3;
  34 }
  35
  36 #outer {
  37   position: relative;
  38   height: 200px;
  39 }
  40
  41 #time_scale {
  42   height: 15px;
  43   width: 100%;
  44 }
  45
  46 #tooltip {
  47   position: absolute;
  48   background-color: #FFFFCC;
  49   display: none;
  50   font-family: "Courier New";
  51   font-size: 9pt;
  52   padding: 5px;
  53   border: 1px solid #CCCC88;
  54   z-index: 3;
  55 }
  56
  57 #legend {
  58   position: fixed;
  59   left: 10px;
  60   bottom: 10px;
  61   padding: 5px;
  62   border: 1px solid silver;
  63   z-index: 10;
  64   background-color: #f0f0f0;
  65 }
  66
  67 h2 {
  68   margin: 5px;
  69 }
  70
  71 #instructions {
  72   position: absolute;
  73   top:
  74   float: right;
  75   display: none;
  76 }
  77
  78 li.time_tick {
  79   background-color: #FFFFCC;
  80   height: 15px;
  81 }
  82
  83 li {
  84   background: pink;
  85   position: absolute;
  86   height: 10px;
  87   list-style: none;
  88   margin: 0px;
  89   padding: 0px;
  90   z-index: 2;
  91 }
  92
  93 li:hover {
  94   border: 1px solid red;
  95 }
  96
  97 .url {
  98   background-color: green;
  99 }
 100
 101 .http {
 102   background-color: blue;
 103 }
 104
 105 .socket {
 106   background-color: black;
 107 }
 108
 109 .v8 {
 110   background-color: orange;
 111 }
 112
 113 .loop {
 114   background-color: gray;
 115 }
 116
 117 .io {
 118   background-color: blue;
 119 }
 120
 121 </style>
 122
 123 <script src='trace_data.js'></script>
 124 <script>
 125 var scale = 100000;
 126 var row_height = 15;
 127 var trace_initial_time = 0;
 128 var trace_threads = {};
 129 var heartbeats = [];
 130 var trace_total_time = 0;
 131
 132 function process_raw_events() {
 133   trace_initial_time = raw_trace_events[0].usec_begin;
 134   var stack = [];
 135   var e;
 136   for (var i in raw_trace_events) {
 137     e = raw_trace_events[i];
 138     var trace_events = trace_threads["e.tid"];
 139     if (!trace_events) {
 140       trace_events = [];
 141       trace_threads["e.tid"] = trace_events;
 142     }
 143     if (e.name.indexOf("heartbeat.") == 0) {
 144       heartbeats.push(e);
 145     } else if (e.type == "BEGIN") {
 146       trace_events.push(e);
 147       stack.unshift(e);
 148     } else if (e.type == "END") {
 149       for (var s in stack) {
 150         var begin = stack[s];
 151         if ((begin.id == e.id) && (begin.name == e.name) &&
 152             (begin.pid == e.pid) && (begin.tid == e.tid)) {
 153           begin.usec_end = e.usec_begin;
 154           begin.duration = begin.usec_end - begin.usec_begin;
 155           begin.extra += " " + e.extra;
 156           stack.splice(s, 1);
 157           break;
 158         }
 159       }
 160     } else if (e.type == "INSTANT") {
 161       trace_events.push(e);
 162       e.duration = 0;
 163     }
 164   }
 165   if (e.usec_end)
 166     trace_total_time = e.usec_end - trace_initial_time;
 167   else
 168     trace_total_time = e.usec_begin - trace_initial_time;
 169 }
 170
 171 function compute_scale() {
 172   var outer = document.getElementById("outer");
 173   scale = Math.floor(trace_total_time / (outer.offsetWidth - (row_height * 2)));
 174 };
 175
 176 function show_details(tid, i, event) {
 177   var trace_events = trace_threads["e.tid"];
 178   var inner = trace_events[i].name + " " +
 179               trace_events[i].duration / 1000 + "ms<br />" +
 180               trace_events[i].id  + "<br />" +
 181               trace_events[i].extra  + "<br />";
 182   var tooltip = document.getElementById("tooltip");
 183   tooltip.innerHTML = inner;
 184   if (window.event)
 185     event = window.event;
 186   tooltip.style.top = event.pageY + 3;
 187   tooltip.style.left = event.pageX + 3;
 188   tooltip.style.display = "block";
 189 };
 190
 191 function generate_time_scale() {
 192   var view_size = window.clientWidth;
 193   var body_size = document.body.scrollWidth;
 194   var inner = "";
 195
 196   var step_ms = Math.floor(scale / 10); // ms per 100px
 197   var pow10 = Math.pow(10, Math.floor(Math.log(step_ms) / Math.log(10)));
 198   var round = .5 * pow10;
 199   step_ms = round * (Math.floor(step_ms / round)); // round to a multiple of round
 200   for (var i = step_ms; i < trace_total_time / 1000; i += step_ms) {
 201     var x = Math.floor(i * 1000 / scale);
 202     inner += "<li class='time_tick' style='left: " + x + "px'>" + i + "</li>";
 203   }
 204   var time_scale = document.getElementById("time_scale");
 205   time_scale.innerHTML = inner;
 206   time_scale.style.width = document.body.scrollWidth;
 207 }
 208
 209 function generate_io_graph(trace_events, top) {
 210   var max_height = 200;
 211   var bucket_size = 50000;  // millisecs
 212
 213   var inner = "";
 214   var buckets = new Array();
 215   var value = 0;
 216   var max_bucket = 0;
 217
 218   // Go through events and find all read samples.
 219   // Aggregate data into buckets.
 220   for (var i in trace_events) {
 221     var e = trace_events[i];
 222     if (e.name != "socket.read") {
 223       continue;
 224     }
 225
 226     var bytes = parseInt(e.extra);
 227 //    bytes = 400;
 228
 229     var start_time = e.usec_begin - trace_initial_time;
 230     var mybucket = Math.floor(start_time / bucket_size);
 231
 232     if (buckets[mybucket] == undefined) {
 233       buckets[mybucket] = 0;
 234     }
 235     buckets[mybucket] += bytes;
 236
 237     if (buckets[max_bucket] == undefined ||
 238         buckets[max_bucket] < buckets[mybucket]) {
 239       max_bucket = mybucket;
 240     }
 241   }
 242
 243   for (var index = 0; index < buckets.length; index++) {
 244     var left = index * Math.floor(bucket_size / scale);
 245     var width = Math.floor(bucket_size / scale);
 246     if (width == 0)
 247       width = 1;
 248
 249     var height;
 250     if (buckets[index] == undefined) {
 251       height = 0;
 252     } else {
 253       height = (buckets[index] / buckets[max_bucket]) * max_height;
 254     }
 255
 256     var my_top = max_height - height;
 257
 258     var style = "top: " + my_top + "px; left: " + left + "px; width: " + width + "px; height:" + height + "px;";
 259     var cls = "io";
 260     inner += "<li title='" + buckets[index] + " bytes' class='" + cls + "' id='li-" + i + "' style='" + style + "'></li>\n";
 261   }
 262
 263   var subchart = document.createElement('div');
 264   subchart.setAttribute("class", "iograph");
 265   subchart.setAttribute("id", trace_events[0].tid);
 266   subchart.innerHTML = inner;
 267   subchart.style.height = max_height;
 268   subchart.style.top = top;
 269   subchart.style.left = 0;
 270   subchart.style.position = "absolute";
 271 //  subchart.style.width = row_height + last_max_x;
 272   var chart = document.getElementById("chart");
 273   chart.appendChild(subchart);
 274
 275   return top + max_height;
 276 }
 277
 278 function generate_subchart(trace_events, top) {
 279   var start_top = top;
 280   var heights = new Array();
 281   var max_row = 0;
 282   var inner = "";
 283   var last_max_time = 0;
 284   var last_max_x = 0;
 285   for (var i in trace_events) {
 286     var e = trace_events[i];
 287     var start_time = e.usec_begin - trace_initial_time;
 288     var left = row_height + Math.floor(start_time / scale);
 289     var width = Math.floor(e.duration / scale);
 290     if (width == 0)
 291       width = 1;
 292
 293     if (heights[e.id]) {
 294       top = heights[e.id];
 295     } else {
 296       max_row += row_height;
 297       heights[e.id] = max_row;
 298       top = heights[e.id];
 299     }
 300     //if (start_time < last_max_time)
 301     //  top += row_height;
 302     var style = "top: " + top + "px; left: " + left + "px; width: " + width + "px;";
 303     var js = 'javascript:show_details("' + e.tid + '", ' + i + ', event);';
 304     var cls = e.name.split('.')[0];
 305     inner += "<li class='" + cls + "' onmouseover='" + js + "' id='li-" + i + "' style='" + style + "'></li>\n";
 306     last_max_time = start_time + e.duration;
 307     last_max_x = left + width;
 308   }
 309   var subchart = document.createElement('div');
 310   subchart.setAttribute("class", "subchart");
 311   subchart.setAttribute("id", trace_events[0].tid);
 312   subchart.innerHTML = inner;
 313   subchart.style.top = start_top + "px";
 314   subchart.style.height = top + row_height;
 315   subchart.style.width = row_height + last_max_x;
 316   subchart.style.position = "absolute";
 317   var chart = document.getElementById("chart");
 318   chart.appendChild(subchart);
 319
 320   return top;
 321 };
 322
 323 function generate_chart() {
 324   var chart = document.getElementById("chart");
 325   chart.innerHTML = "";
 326   var top = 60;
 327   for (var t in trace_threads) {
 328     top = generate_io_graph(trace_threads[t], top);
 329     top = generate_subchart(trace_threads[t], top);
 330   }
 331   generate_time_scale();
 332 }
 333
 334 function change_scale(event) {
 335   if (!event)
 336     event = window.event;
 337   if (!event.shiftKey)
 338     return;
 339   var delta = 0;
 340   if (event.wheelDelta) {
 341     delta = event.wheelDelta / 120;
 342   } else if (event.detail) {
 343     delta = - event.detail / 3;
 344   }
 345   if (delta) {
 346     var tooltip = document.getElementById("tooltip");
 347     tooltip.style.display = "none";
 348     var factor = 1.1;
 349     if (delta < 0)
 350       scale = Math.floor(scale * factor);
 351     else
 352       scale = Math.floor(scale / factor);
 353     if (scale > 300000)
 354       scale = 300000;
 355     generate_chart();
 356     if (event.preventDefault)
 357       event.preventDefault();
 358   }
 359   event.returnValue = false;
 360 };
 361
 362 function initial_load() {
 363   if (window.addEventListener)
 364     window.addEventListener('DOMMouseScroll', change_scale, false);
 365   window.onmousewheel = document.onmousewheel = change_scale;
 366
 367   process_raw_events();
 368   compute_scale();
 369   generate_chart();
 370 };
 371
 372 </script>
 373 </head>
 374 <body onload='initial_load();'>
 375 <div id="header">
 376 <h2>Trace Events</h2>
 377 <div id="instructions">
 378 Use shift+mouse-wheel to zoom in and out.
 379 </div>
 380 <div id="time_scale"></div>
 381 </div>
 382 <div id="legend">
 383 <span class="url">&nbsp;</span> URL<br />
 384 <span class="http">&nbsp;</span> HTTP<br />
 385 <span class="socket">&nbsp;</span> Socket<br />
 386 <span class="v8">&nbsp;</span> V8<br />
 387 <span class="loop">&nbsp;</span> TASKS<br />
 388 </div>
 389 <div id="chart">
 390 <div id="outer">
 391 </div>
 392 </div>
 393 <div id="tooltip" ondblclick="this.style.display = 'none';"></div>
 394 </body>
 395 </html>