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<!DOCTYPE html>
<!--
Copyright (c) 2013 The Chromium Authors. All rights reserved.
Use of this source code is governed by a BSD-style license that can be
found in the LICENSE file.
-->
<link rel="import" href="/tracing/model/counter_sample.html">
<link rel="import" href="/tracing/model/event_container.html">
<script>
'use strict';
tr.exportTo('tr.model', function() {
var CounterSample = tr.model.CounterSample;
/**
* A container holding all samples of a given measurement over time.
*
* As an example, a counter series might measure the throughput of data sent
* over a USB connection, with each sample representing the instantaneous
* throughput of the connection.
*
* @constructor
* @extends {EventContainer}
*/
function CounterSeries(name, color) {
tr.model.EventContainer.call(this);
this.name_ = name;
this.color_ = color;
this.timestamps_ = [];
this.samples_ = [];
// Set by counter.addSeries
this.counter = undefined;
this.seriesIndex = undefined;
}
CounterSeries.prototype = {
__proto__: tr.model.EventContainer.prototype,
get length() {
return this.timestamps_.length;
},
get name() {
return this.name_;
},
get color() {
return this.color_;
},
get samples() {
return this.samples_;
},
get timestamps() {
return this.timestamps_;
},
getSample: function(idx) {
return this.samples_[idx];
},
getTimestamp: function(idx) {
return this.timestamps_[idx];
},
addCounterSample: function(ts, val) {
var sample = new CounterSample(this, ts, val);
this.addSample(sample);
return sample;
},
addSample: function(sample) {
this.timestamps_.push(sample.timestamp);
this.samples_.push(sample);
},
getStatistics: function(sampleIndices) {
var sum = 0;
var min = Number.MAX_VALUE;
var max = -Number.MAX_VALUE;
for (var i = 0; i < sampleIndices.length; ++i) {
var sample = this.getSample(sampleIndices[i]).value;
sum += sample;
min = Math.min(sample, min);
max = Math.max(sample, max);
}
return {
min: min,
max: max,
avg: (sum / sampleIndices.length),
start: this.getSample(sampleIndices[0]).value,
end: this.getSample(sampleIndices.length - 1).value
};
},
shiftTimestampsForward: function(amount) {
for (var i = 0; i < this.timestamps_.length; ++i) {
this.timestamps_[i] += amount;
this.samples_[i].timestamp = this.timestamps_[i];
}
},
childEvents: function*() {
yield * this.samples_;
},
childEventContainers: function*() {
}
};
return {
CounterSeries: CounterSeries
};
});
</script>
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