clock_parser.js revision 88448d9ae4dfff1805045790ef5f32495d62abcc 
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/**
6 * @fileoverview Parses trace_marker events that were inserted in the trace by
7 * userland.
8 */
9base.require('importer.linux_perf.parser');
10base.exportTo('tracing.importer.linux_perf', function() {
11
12  var Parser = tracing.importer.linux_perf.Parser;
13
14  /**
15   * Parses linux trace mark events that were inserted in the trace by userland.
16   * @constructor
17   */
18  function ClockParser(importer) {
19    Parser.call(this, importer);
20
21    importer.registerEventHandler('clock_set_rate',
22        ClockParser.prototype.traceMarkWriteClockEvent.bind(this));
23
24    this.model_ = importer.model_;
25    this.ppids_ = {};
26  }
27
28  ClockParser.prototype = {
29    __proto__: Parser.prototype,
30
31    traceMarkWriteClockEvent: function(eventName, cpuNumber, pid, ts,
32                                  eventBase, threadName) {
33        var event = /(\S+) state=(\d+) cpu_id=(\d+)/.exec(eventBase.details);
34
35
36        var name = event[1];
37        var rate = parseInt(event[2]);
38
39        var ctr = this.model_.getOrCreateProcess(0)
40              .getOrCreateCounter(null, name);
41        // Initialize the counter's series fields if needed.
42        if (ctr.numSeries == 0) {
43            ctr.seriesNames.push('value');
44            ctr.seriesColors.push(
45                tracing.getStringColorId(ctr.name + '.' + 'value'));
46        }
47
48        // Add the sample value.
49        ctr.timestamps.push(ts);
50        ctr.samples.push(rate);
51
52        return true;
53    },
54  };
55
56  Parser.registerSubtype(ClockParser);
57
58  return {
59    ClockParser: ClockParser
60  };
61});
62