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1 // Copyright (c) 2011 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 #include "net/base/connection_type_histograms.h" | |
6 | |
7 #include "base/metrics/histogram.h" | |
8 | |
9 namespace net { | |
10 | |
11 // We're using a histogram as a group of counters. We're only interested in | |
12 // the values of the counters. Ignore the shape, average, and standard | |
13 // deviation of the histograms because they are meaningless. | |
14 // | |
15 // We use two groups of counters. In the first group (counter1), each counter | |
16 // is a boolean (0 or 1) that indicates whether the user has seen a connection | |
17 // of that type during that session. In the second group (counter2), each | |
18 // counter is the number of connections of that type the user has seen during | |
19 // that session. | |
20 // | |
21 // Each histogram has an unused bucket at the end to allow seamless future | |
22 // expansion. | |
23 void UpdateConnectionTypeHistograms(ConnectionType type) { | |
24 // TODO(wtc): Bug 74467 Move these stats up to a higher level. | |
25 static bool had_connection_type[NUM_OF_CONNECTION_TYPES]; // Default false. | |
26 | |
27 if (type >= 0 && type < NUM_OF_CONNECTION_TYPES) { | |
28 if (!had_connection_type[type]) { | |
29 had_connection_type[type] = true; | |
30 UMA_HISTOGRAM_ENUMERATION("Net.HadConnectionType3", | |
31 type, NUM_OF_CONNECTION_TYPES); | |
32 } | |
33 | |
34 UMA_HISTOGRAM_ENUMERATION("Net.ConnectionTypeCount3", | |
35 type, NUM_OF_CONNECTION_TYPES); | |
36 } else { | |
37 NOTREACHED(); // Someone's logging an invalid type! | |
38 } | |
39 } | |
40 | |
41 } // namespace net | |
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