| // Copyright (c) 2011 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. |
| |
| #include "net/base/connection_type_histograms.h" |
| |
| #include "base/metrics/histogram.h" |
| |
| namespace net { |
| |
| // We're using a histogram as a group of counters. We're only interested in |
| // the values of the counters. Ignore the shape, average, and standard |
| // deviation of the histograms because they are meaningless. |
| // |
| // We use two groups of counters. In the first group (counter1), each counter |
| // is a boolean (0 or 1) that indicates whether the user has seen a connection |
| // of that type during that session. In the second group (counter2), each |
| // counter is the number of connections of that type the user has seen during |
| // that session. |
| // |
| // Each histogram has an unused bucket at the end to allow seamless future |
| // expansion. |
| void UpdateConnectionTypeHistograms(ConnectionType type) { |
| // TODO(wtc): Bug 74467 Move these stats up to a higher level. |
| static bool had_connection_type[NUM_OF_CONNECTION_TYPES]; // Default false. |
| |
| if (type >= 0 && type < NUM_OF_CONNECTION_TYPES) { |
| if (!had_connection_type[type]) { |
| had_connection_type[type] = true; |
| UMA_HISTOGRAM_ENUMERATION("Net.HadConnectionType3", |
| type, NUM_OF_CONNECTION_TYPES); |
| } |
| |
| UMA_HISTOGRAM_ENUMERATION("Net.ConnectionTypeCount3", |
| type, NUM_OF_CONNECTION_TYPES); |
| } else { |
| NOTREACHED(); // Someone's logging an invalid type! |
| } |
| } |
| |
| } // namespace net |