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 42
