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| 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #include "net/base/connection_type_histograms.h" | 5 #include "net/base/connection_type_histograms.h" |
| 6 | 6 |
| 7 #include "base/metrics/histogram.h" | 7 #include "base/metrics/histogram.h" |
| 8 | 8 |
| 9 namespace net { | 9 namespace net { |
| 10 | 10 |
| 11 // We're using a histogram as a group of counters. We're only interested in | 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 | 12 // the values of the counters. Ignore the shape, average, and standard |
| 13 // deviation of the histograms because they are meaningless. | 13 // deviation of the histograms because they are meaningless. |
| 14 // | 14 // |
| 15 // We use two groups of counters. In the first group (counter1), each counter | 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 | 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 | 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 | 18 // counter is the number of connections of that type the user has seen during |
| 19 // that session. | 19 // that session. |
| 20 // | 20 // |
| 21 // Each histogram has an unused bucket at the end to allow seamless future | 21 // Each histogram has an unused bucket at the end to allow seamless future |
| 22 // expansion. | 22 // expansion. |
| 23 void UpdateConnectionTypeHistograms(ConnectionType type) { | 23 void UpdateConnectionTypeHistograms(ConnectionType type) { |
| 24 // TODO(wtc): Bug 74467 Move these stats up to a higher level. | 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. | 25 static bool had_connection_type[NUM_OF_CONNECTION_TYPES]; // Default false. |
| 26 | 26 |
| 27 if (type >= 0 && type < NUM_OF_CONNECTION_TYPES) { | 27 if (type >= 0 && type < NUM_OF_CONNECTION_TYPES) { |
| 28 if (!had_connection_type[type]) { | 28 if (!had_connection_type[type]) { |
| 29 had_connection_type[type] = true; | 29 had_connection_type[type] = true; |
| 30 UMA_HISTOGRAM_ENUMERATION("Net.HadConnectionType3", | 30 UMA_HISTOGRAM_ENUMERATION( |
| 31 type, NUM_OF_CONNECTION_TYPES); | 31 "Net.HadConnectionType3", type, NUM_OF_CONNECTION_TYPES); |
| 32 } | 32 } |
| 33 | 33 |
| 34 UMA_HISTOGRAM_ENUMERATION("Net.ConnectionTypeCount3", | 34 UMA_HISTOGRAM_ENUMERATION( |
| 35 type, NUM_OF_CONNECTION_TYPES); | 35 "Net.ConnectionTypeCount3", type, NUM_OF_CONNECTION_TYPES); |
| 36 } else { | 36 } else { |
| 37 NOTREACHED(); // Someone's logging an invalid type! | 37 NOTREACHED(); // Someone's logging an invalid type! |
| 38 } | 38 } |
| 39 } | 39 } |
| 40 | 40 |
| 41 } // namespace net | 41 } // namespace net |
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