clock_parser.js revision 66a37686207944273ced825e0e8b6b6375f8c3de 
1// Copyright (c) 2012 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5'use strict';
6
7/**
8 * @fileoverview Parses trace_marker events that were inserted in the trace by
9 * userland.
10 */
11base.require('tracing.importer.linux_perf.parser');
12base.exportTo('tracing.importer.linux_perf', function() {
13
14  var Parser = tracing.importer.linux_perf.Parser;
15
16  /**
17   * Parses linux trace mark events that were inserted in the trace by userland.
18   * @constructor
19   */
20  function ClockParser(importer) {
21    Parser.call(this, importer);
22
23    importer.registerEventHandler('clock_set_rate',
24        ClockParser.prototype.traceMarkWriteClockEvent.bind(this));
25
26    this.model_ = importer.model_;
27    this.ppids_ = {};
28  }
29
30  ClockParser.prototype = {
31    __proto__: Parser.prototype,
32
33    traceMarkWriteClockEvent: function(eventName, cpuNumber, pid, ts,
34                                       eventBase, threadName) {
35      var event = /(\S+) state=(\d+) cpu_id=(\d+)/.exec(eventBase.details);
36
37
38      var name = event[1];
39      var rate = parseInt(event[2]);
40
41      var ctr = this.model_.getOrCreateProcess(0)
42              .getOrCreateCounter(null, name);
43      // Initialize the counter's series fields if needed.
44      if (ctr.numSeries == 0) {
45        ctr.seriesNames.push('value');
46        ctr.seriesColors.push(
47            tracing.getStringColorId(ctr.name + '.' + 'value'));
48      }
49
50      // Add the sample value.
51      ctr.timestamps.push(ts);
52      ctr.samples.push(rate);
53
54      return true;
55    }
56  };
57
58  Parser.registerSubtype(ClockParser);
59
60  return {
61    ClockParser: ClockParser
62  };
63});
64