Darin Petkov | 65b0146 | 2010-04-14 13:32:20 -0700 | [diff] [blame] | 1 | // Copyright (c) 2010 The Chromium OS 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 "metrics_daemon.h" |
| 6 | #include "metrics_library.h" |
| 7 | |
Darin Petkov | 703ec97 | 2010-04-27 11:02:18 -0700 | [diff] [blame] | 8 | #include <dbus/dbus-glib-lowlevel.h> |
Darin Petkov | 41e0623 | 2010-05-03 16:45:37 -0700 | [diff] [blame^] | 9 | #include <sys/file.h> |
Darin Petkov | 65b0146 | 2010-04-14 13:32:20 -0700 | [diff] [blame] | 10 | |
Darin Petkov | 41e0623 | 2010-05-03 16:45:37 -0700 | [diff] [blame^] | 11 | #include <base/eintr_wrapper.h> |
Darin Petkov | 65b0146 | 2010-04-14 13:32:20 -0700 | [diff] [blame] | 12 | #include <base/logging.h> |
| 13 | |
Darin Petkov | 703ec97 | 2010-04-27 11:02:18 -0700 | [diff] [blame] | 14 | #define SAFE_MESSAGE(e) (e.message ? e.message : "unknown error") |
| 15 | #define DBUS_IFACE_CONNMAN_MANAGER "org.moblin.connman.Manager" |
| 16 | #define DBUS_IFACE_POWER_MANAGER "org.chromium.Power.Manager" |
Darin Petkov | 41e0623 | 2010-05-03 16:45:37 -0700 | [diff] [blame^] | 17 | #define DBUS_IFACE_SCREENSAVER_MANAGER "org.chromium.ScreenSaver.Manager" |
| 18 | #define DBUS_IFACE_SESSION_MANAGER "org.chromium.SessionManagerInterface" |
| 19 | |
| 20 | // File to aggregate daily usage before sending to UMA. |
| 21 | // TODO(petkov): This file should probably live in a user-specific stateful |
| 22 | // location, e.g., /home/chronos/user. |
| 23 | static const char kDailyUseRecordFile[] = "/var/log/metrics/daily-usage"; |
| 24 | |
| 25 | static const int kSecondsPerMinute = 60; |
| 26 | static const int kMinutesPerHour = 60; |
| 27 | static const int kHoursPerDay = 24; |
| 28 | static const int kMinutesPerDay = kHoursPerDay * kMinutesPerHour; |
| 29 | static const int kSecondsPerDay = kMinutesPerDay * kSecondsPerMinute; |
| 30 | |
| 31 | // The daily use monitor is scheduled to a 1-minute interval after |
| 32 | // initial user activity and then it's exponentially backed off to |
| 33 | // 10-minute intervals. Although not required, the back off is |
| 34 | // implemented because the histogram buckets are spaced exponentially |
| 35 | // anyway and to avoid too frequent metrics daemon process wake-ups |
| 36 | // and file I/O. |
| 37 | static const int kUseMonitorIntervalInit = 1 * kSecondsPerMinute; |
| 38 | static const int kUseMonitorIntervalMax = 10 * kSecondsPerMinute; |
Darin Petkov | 65b0146 | 2010-04-14 13:32:20 -0700 | [diff] [blame] | 39 | |
Darin Petkov | 703ec97 | 2010-04-27 11:02:18 -0700 | [diff] [blame] | 40 | // static |
Darin Petkov | 41e0623 | 2010-05-03 16:45:37 -0700 | [diff] [blame^] | 41 | const char* MetricsDaemon::kDBusMatches_[] = { |
Darin Petkov | 703ec97 | 2010-04-27 11:02:18 -0700 | [diff] [blame] | 42 | "type='signal'," |
| 43 | "sender='org.moblin.connman'," |
| 44 | "interface='" DBUS_IFACE_CONNMAN_MANAGER "'," |
| 45 | "path='/'," |
| 46 | "member='StateChanged'", |
| 47 | |
| 48 | "type='signal'," |
| 49 | "interface='" DBUS_IFACE_POWER_MANAGER "'," |
| 50 | "path='/'," |
| 51 | "member='PowerStateChanged'", |
Darin Petkov | 41e0623 | 2010-05-03 16:45:37 -0700 | [diff] [blame^] | 52 | |
| 53 | "type='signal'," |
| 54 | "interface='" DBUS_IFACE_SCREENSAVER_MANAGER "'," |
| 55 | "path='/'," |
| 56 | "member='LockStateChanged'", |
| 57 | |
| 58 | "type='signal'," |
| 59 | "sender='org.chromium.SessionManager'," |
| 60 | "interface='" DBUS_IFACE_SESSION_MANAGER "'," |
| 61 | "path='/org/chromium/SessionManager'," |
| 62 | "member='SessionStateChanged'", |
Darin Petkov | 703ec97 | 2010-04-27 11:02:18 -0700 | [diff] [blame] | 63 | }; |
| 64 | |
| 65 | // static |
Darin Petkov | 41e0623 | 2010-05-03 16:45:37 -0700 | [diff] [blame^] | 66 | const char* MetricsDaemon::kNetworkStates_[] = { |
Darin Petkov | 703ec97 | 2010-04-27 11:02:18 -0700 | [diff] [blame] | 67 | #define STATE(name, capname) #name, |
Darin Petkov | 65b0146 | 2010-04-14 13:32:20 -0700 | [diff] [blame] | 68 | #include "network_states.h" |
| 69 | }; |
| 70 | |
Darin Petkov | 703ec97 | 2010-04-27 11:02:18 -0700 | [diff] [blame] | 71 | // static |
Darin Petkov | 41e0623 | 2010-05-03 16:45:37 -0700 | [diff] [blame^] | 72 | const char* MetricsDaemon::kPowerStates_[] = { |
Darin Petkov | 703ec97 | 2010-04-27 11:02:18 -0700 | [diff] [blame] | 73 | #define STATE(name, capname) #name, |
| 74 | #include "power_states.h" |
| 75 | }; |
| 76 | |
Darin Petkov | 41e0623 | 2010-05-03 16:45:37 -0700 | [diff] [blame^] | 77 | // static |
| 78 | const char* MetricsDaemon::kScreenSaverStates_[] = { |
| 79 | #define STATE(name, capname) #name, |
| 80 | #include "screensaver_states.h" |
| 81 | }; |
| 82 | |
| 83 | // static |
| 84 | const char* MetricsDaemon::kSessionStates_[] = { |
| 85 | #define STATE(name, capname) #name, |
| 86 | #include "session_states.h" |
| 87 | }; |
| 88 | |
Darin Petkov | 65b0146 | 2010-04-14 13:32:20 -0700 | [diff] [blame] | 89 | void MetricsDaemon::Run(bool run_as_daemon, bool testing) { |
| 90 | Init(testing); |
| 91 | if (!run_as_daemon || daemon(0, 0) == 0) { |
| 92 | Loop(); |
| 93 | } |
| 94 | } |
| 95 | |
| 96 | void MetricsDaemon::Init(bool testing) { |
| 97 | testing_ = testing; |
Darin Petkov | 65b0146 | 2010-04-14 13:32:20 -0700 | [diff] [blame] | 98 | |
Darin Petkov | 703ec97 | 2010-04-27 11:02:18 -0700 | [diff] [blame] | 99 | g_thread_init(NULL); |
| 100 | g_type_init(); |
| 101 | dbus_g_thread_init(); |
Darin Petkov | 65b0146 | 2010-04-14 13:32:20 -0700 | [diff] [blame] | 102 | |
Darin Petkov | 703ec97 | 2010-04-27 11:02:18 -0700 | [diff] [blame] | 103 | DBusError error; |
| 104 | dbus_error_init(&error); |
Darin Petkov | 65b0146 | 2010-04-14 13:32:20 -0700 | [diff] [blame] | 105 | |
Darin Petkov | 703ec97 | 2010-04-27 11:02:18 -0700 | [diff] [blame] | 106 | DBusConnection *connection = dbus_bus_get(DBUS_BUS_SYSTEM, &error); |
| 107 | LOG_IF(FATAL, dbus_error_is_set(&error)) << |
| 108 | "No D-Bus connection: " << SAFE_MESSAGE(error); |
Darin Petkov | 65b0146 | 2010-04-14 13:32:20 -0700 | [diff] [blame] | 109 | |
Darin Petkov | 703ec97 | 2010-04-27 11:02:18 -0700 | [diff] [blame] | 110 | dbus_connection_setup_with_g_main(connection, NULL); |
Darin Petkov | 65b0146 | 2010-04-14 13:32:20 -0700 | [diff] [blame] | 111 | |
Darin Petkov | 703ec97 | 2010-04-27 11:02:18 -0700 | [diff] [blame] | 112 | // Registers D-Bus matches for the signals we would like to catch. |
Darin Petkov | 41e0623 | 2010-05-03 16:45:37 -0700 | [diff] [blame^] | 113 | for (unsigned int m = 0; m < sizeof(kDBusMatches_) / sizeof(char *); m++) { |
| 114 | const char* match = kDBusMatches_[m]; |
| 115 | DLOG(INFO) << "adding dbus match: " << match; |
Darin Petkov | 703ec97 | 2010-04-27 11:02:18 -0700 | [diff] [blame] | 116 | dbus_bus_add_match(connection, match, &error); |
| 117 | LOG_IF(FATAL, dbus_error_is_set(&error)) << |
| 118 | "unable to add a match: " << SAFE_MESSAGE(error); |
| 119 | } |
| 120 | |
| 121 | // Adds the D-Bus filter routine to be called back whenever one of |
| 122 | // the registered D-Bus matches is successful. The daemon is not |
| 123 | // activated for D-Bus messages that don't match. |
| 124 | CHECK(dbus_connection_add_filter(connection, MessageFilter, this, NULL)); |
Darin Petkov | 65b0146 | 2010-04-14 13:32:20 -0700 | [diff] [blame] | 125 | } |
| 126 | |
| 127 | void MetricsDaemon::Loop() { |
Darin Petkov | 703ec97 | 2010-04-27 11:02:18 -0700 | [diff] [blame] | 128 | GMainLoop* loop = g_main_loop_new(NULL, false); |
| 129 | g_main_loop_run(loop); |
Darin Petkov | 65b0146 | 2010-04-14 13:32:20 -0700 | [diff] [blame] | 130 | } |
| 131 | |
Darin Petkov | 703ec97 | 2010-04-27 11:02:18 -0700 | [diff] [blame] | 132 | // static |
| 133 | DBusHandlerResult MetricsDaemon::MessageFilter(DBusConnection* connection, |
| 134 | DBusMessage* message, |
| 135 | void* user_data) { |
Darin Petkov | 41e0623 | 2010-05-03 16:45:37 -0700 | [diff] [blame^] | 136 | time_t now = time(NULL); |
| 137 | DLOG(INFO) << "message intercepted @ " << now; |
Darin Petkov | 703ec97 | 2010-04-27 11:02:18 -0700 | [diff] [blame] | 138 | |
| 139 | int message_type = dbus_message_get_type(message); |
| 140 | if (message_type != DBUS_MESSAGE_TYPE_SIGNAL) { |
Darin Petkov | 41e0623 | 2010-05-03 16:45:37 -0700 | [diff] [blame^] | 141 | DLOG(WARNING) << "unexpected message type " << message_type; |
Darin Petkov | 703ec97 | 2010-04-27 11:02:18 -0700 | [diff] [blame] | 142 | return DBUS_HANDLER_RESULT_NOT_YET_HANDLED; |
| 143 | } |
| 144 | |
| 145 | // Signal messages always have interfaces. |
| 146 | const char* interface = dbus_message_get_interface(message); |
| 147 | CHECK(interface != NULL); |
| 148 | |
| 149 | MetricsDaemon* daemon = static_cast<MetricsDaemon*>(user_data); |
| 150 | |
| 151 | DBusMessageIter iter; |
| 152 | dbus_message_iter_init(message, &iter); |
| 153 | if (strcmp(interface, DBUS_IFACE_CONNMAN_MANAGER) == 0) { |
Darin Petkov | 41e0623 | 2010-05-03 16:45:37 -0700 | [diff] [blame^] | 154 | CHECK(strcmp(dbus_message_get_member(message), |
| 155 | "StateChanged") == 0); |
Darin Petkov | 703ec97 | 2010-04-27 11:02:18 -0700 | [diff] [blame] | 156 | |
| 157 | char *state_name; |
| 158 | dbus_message_iter_get_basic(&iter, &state_name); |
Darin Petkov | 41e0623 | 2010-05-03 16:45:37 -0700 | [diff] [blame^] | 159 | daemon->NetStateChanged(state_name, now); |
Darin Petkov | 703ec97 | 2010-04-27 11:02:18 -0700 | [diff] [blame] | 160 | } else if (strcmp(interface, DBUS_IFACE_POWER_MANAGER) == 0) { |
Darin Petkov | 41e0623 | 2010-05-03 16:45:37 -0700 | [diff] [blame^] | 161 | CHECK(strcmp(dbus_message_get_member(message), |
| 162 | "PowerStateChanged") == 0); |
Darin Petkov | 703ec97 | 2010-04-27 11:02:18 -0700 | [diff] [blame] | 163 | |
| 164 | char *state_name; |
| 165 | dbus_message_iter_get_basic(&iter, &state_name); |
Darin Petkov | 41e0623 | 2010-05-03 16:45:37 -0700 | [diff] [blame^] | 166 | daemon->PowerStateChanged(state_name, now); |
| 167 | } else if (strcmp(interface, DBUS_IFACE_SCREENSAVER_MANAGER) == 0) { |
| 168 | CHECK(strcmp(dbus_message_get_member(message), |
| 169 | "LockStateChanged") == 0); |
| 170 | |
| 171 | char *state_name; |
| 172 | dbus_message_iter_get_basic(&iter, &state_name); |
| 173 | daemon->ScreenSaverStateChanged(state_name, now); |
| 174 | } else if (strcmp(interface, DBUS_IFACE_SESSION_MANAGER) == 0) { |
| 175 | CHECK(strcmp(dbus_message_get_member(message), |
| 176 | "SessionStateChanged") == 0); |
| 177 | |
| 178 | char *state_name; |
| 179 | dbus_message_iter_get_basic(&iter, &state_name); |
| 180 | daemon->SessionStateChanged(state_name, now); |
Darin Petkov | 703ec97 | 2010-04-27 11:02:18 -0700 | [diff] [blame] | 181 | } else { |
Darin Petkov | 41e0623 | 2010-05-03 16:45:37 -0700 | [diff] [blame^] | 182 | DLOG(WARNING) << "unexpected interface: " << interface; |
Darin Petkov | 703ec97 | 2010-04-27 11:02:18 -0700 | [diff] [blame] | 183 | return DBUS_HANDLER_RESULT_NOT_YET_HANDLED; |
| 184 | } |
| 185 | |
| 186 | return DBUS_HANDLER_RESULT_HANDLED; |
Darin Petkov | 65b0146 | 2010-04-14 13:32:20 -0700 | [diff] [blame] | 187 | } |
| 188 | |
Darin Petkov | 41e0623 | 2010-05-03 16:45:37 -0700 | [diff] [blame^] | 189 | void MetricsDaemon::NetStateChanged(const char* state_name, time_t now) { |
| 190 | DLOG(INFO) << "network state: " << state_name; |
Darin Petkov | 703ec97 | 2010-04-27 11:02:18 -0700 | [diff] [blame] | 191 | |
Darin Petkov | 703ec97 | 2010-04-27 11:02:18 -0700 | [diff] [blame] | 192 | NetworkState state = LookupNetworkState(state_name); |
| 193 | |
| 194 | // Logs the time in seconds between the network going online to |
| 195 | // going offline in order to measure the mean time to network |
| 196 | // dropping. Going offline as part of suspend-to-RAM is not logged |
| 197 | // as network drop -- the assumption is that the message for |
| 198 | // suspend-to-RAM comes before the network offline message which |
| 199 | // seems to and should be the case. |
| 200 | if (state == kNetworkStateOffline && |
| 201 | network_state_ == kNetworkStateOnline && |
| 202 | power_state_ != kPowerStateMem) { |
Darin Petkov | 41e0623 | 2010-05-03 16:45:37 -0700 | [diff] [blame^] | 203 | int online_time = static_cast<int>(now - network_state_last_); |
Darin Petkov | 703ec97 | 2010-04-27 11:02:18 -0700 | [diff] [blame] | 204 | PublishMetric("Network.TimeToDrop", online_time, |
| 205 | 1, 8 /* hours */ * 60 * 60, 50); |
Darin Petkov | 65b0146 | 2010-04-14 13:32:20 -0700 | [diff] [blame] | 206 | } |
| 207 | |
Darin Petkov | 703ec97 | 2010-04-27 11:02:18 -0700 | [diff] [blame] | 208 | network_state_ = state; |
Darin Petkov | 41e0623 | 2010-05-03 16:45:37 -0700 | [diff] [blame^] | 209 | network_state_last_ = now; |
Darin Petkov | 65b0146 | 2010-04-14 13:32:20 -0700 | [diff] [blame] | 210 | } |
| 211 | |
Darin Petkov | 703ec97 | 2010-04-27 11:02:18 -0700 | [diff] [blame] | 212 | MetricsDaemon::NetworkState |
| 213 | MetricsDaemon::LookupNetworkState(const char* state_name) { |
Darin Petkov | 65b0146 | 2010-04-14 13:32:20 -0700 | [diff] [blame] | 214 | for (int i = 0; i < kNumberNetworkStates; i++) { |
Darin Petkov | 41e0623 | 2010-05-03 16:45:37 -0700 | [diff] [blame^] | 215 | if (strcmp(state_name, kNetworkStates_[i]) == 0) { |
Darin Petkov | 703ec97 | 2010-04-27 11:02:18 -0700 | [diff] [blame] | 216 | return static_cast<NetworkState>(i); |
Darin Petkov | 65b0146 | 2010-04-14 13:32:20 -0700 | [diff] [blame] | 217 | } |
| 218 | } |
Darin Petkov | 41e0623 | 2010-05-03 16:45:37 -0700 | [diff] [blame^] | 219 | DLOG(WARNING) << "unknown network connection state: " << state_name; |
Darin Petkov | 703ec97 | 2010-04-27 11:02:18 -0700 | [diff] [blame] | 220 | return kUnknownNetworkState; |
| 221 | } |
| 222 | |
Darin Petkov | 41e0623 | 2010-05-03 16:45:37 -0700 | [diff] [blame^] | 223 | void MetricsDaemon::PowerStateChanged(const char* state_name, time_t now) { |
| 224 | DLOG(INFO) << "power state: " << state_name; |
Darin Petkov | 703ec97 | 2010-04-27 11:02:18 -0700 | [diff] [blame] | 225 | power_state_ = LookupPowerState(state_name); |
Darin Petkov | 41e0623 | 2010-05-03 16:45:37 -0700 | [diff] [blame^] | 226 | |
| 227 | if (power_state_ != kPowerStateOn) |
| 228 | SetUserActiveState(false, now); |
Darin Petkov | 703ec97 | 2010-04-27 11:02:18 -0700 | [diff] [blame] | 229 | } |
| 230 | |
| 231 | MetricsDaemon::PowerState |
| 232 | MetricsDaemon::LookupPowerState(const char* state_name) { |
| 233 | for (int i = 0; i < kNumberPowerStates; i++) { |
Darin Petkov | 41e0623 | 2010-05-03 16:45:37 -0700 | [diff] [blame^] | 234 | if (strcmp(state_name, kPowerStates_[i]) == 0) { |
Darin Petkov | 703ec97 | 2010-04-27 11:02:18 -0700 | [diff] [blame] | 235 | return static_cast<PowerState>(i); |
| 236 | } |
| 237 | } |
Darin Petkov | 41e0623 | 2010-05-03 16:45:37 -0700 | [diff] [blame^] | 238 | DLOG(WARNING) << "unknown power state: " << state_name; |
Darin Petkov | 703ec97 | 2010-04-27 11:02:18 -0700 | [diff] [blame] | 239 | return kUnknownPowerState; |
Darin Petkov | 65b0146 | 2010-04-14 13:32:20 -0700 | [diff] [blame] | 240 | } |
| 241 | |
Darin Petkov | 41e0623 | 2010-05-03 16:45:37 -0700 | [diff] [blame^] | 242 | void MetricsDaemon::ScreenSaverStateChanged(const char* state_name, |
| 243 | time_t now) { |
| 244 | DLOG(INFO) << "screen-saver state: " << state_name; |
| 245 | screensaver_state_ = LookupScreenSaverState(state_name); |
| 246 | SetUserActiveState(screensaver_state_ == kScreenSaverStateUnlocked, now); |
| 247 | } |
| 248 | |
| 249 | MetricsDaemon::ScreenSaverState |
| 250 | MetricsDaemon::LookupScreenSaverState(const char* state_name) { |
| 251 | for (int i = 0; i < kNumberScreenSaverStates; i++) { |
| 252 | if (strcmp(state_name, kScreenSaverStates_[i]) == 0) { |
| 253 | return static_cast<ScreenSaverState>(i); |
| 254 | } |
| 255 | } |
| 256 | DLOG(WARNING) << "unknown screen-saver state: " << state_name; |
| 257 | return kUnknownScreenSaverState; |
| 258 | } |
| 259 | |
| 260 | void MetricsDaemon::SessionStateChanged(const char* state_name, |
| 261 | time_t now) { |
| 262 | DLOG(INFO) << "user session state: " << state_name; |
| 263 | session_state_ = LookupSessionState(state_name); |
| 264 | SetUserActiveState(session_state_ == kSessionStateStarted, now); |
| 265 | } |
| 266 | |
| 267 | MetricsDaemon::SessionState |
| 268 | MetricsDaemon::LookupSessionState(const char* state_name) { |
| 269 | for (int i = 0; i < kNumberSessionStates; i++) { |
| 270 | if (strcmp(state_name, kSessionStates_[i]) == 0) { |
| 271 | return static_cast<SessionState>(i); |
| 272 | } |
| 273 | } |
| 274 | DLOG(WARNING) << "unknown user session state: " << state_name; |
| 275 | return kUnknownSessionState; |
| 276 | } |
| 277 | |
| 278 | void MetricsDaemon::SetUserActiveState(bool active, time_t now) { |
| 279 | DLOG(INFO) << "user: " << (active ? "active" : "inactive"); |
| 280 | |
| 281 | // Calculates the seconds of active use since the last update and |
| 282 | // the day since Epoch, and logs the usage data. |
| 283 | int seconds = user_active_ ? (now - user_active_last_) : 0; |
| 284 | int day = now / kSecondsPerDay; |
| 285 | LogDailyUseRecord(day, seconds); |
| 286 | |
| 287 | // Schedules a use monitor on inactive->active transitions and |
| 288 | // unschedules it on active->inactive transitions. |
| 289 | if (!user_active_ && active) |
| 290 | ScheduleUseMonitor(kUseMonitorIntervalInit, /* backoff */ false); |
| 291 | else if (user_active_ && !active) |
| 292 | UnscheduleUseMonitor(); |
| 293 | |
| 294 | // Remembers the current active state and the time of the last |
| 295 | // activity update. |
| 296 | user_active_ = active; |
| 297 | user_active_last_ = now; |
| 298 | } |
| 299 | |
| 300 | void MetricsDaemon::LogDailyUseRecord(int day, int seconds) { |
| 301 | // If there's no new active use today and the last record in the |
| 302 | // usage aggregation file is today, there's nothing to do. |
| 303 | if (seconds == 0 && day == daily_use_day_last_) |
| 304 | return; |
| 305 | |
| 306 | DLOG(INFO) << "day: " << day << " usage: " << seconds << " seconds"; |
| 307 | int fd = HANDLE_EINTR(open(kDailyUseRecordFile, |
| 308 | O_RDWR | O_CREAT, |
| 309 | S_IRUSR | S_IWUSR)); |
| 310 | if (fd < 0) { |
| 311 | DLOG(WARNING) << "Unable to open the daily use file."; |
| 312 | return; |
| 313 | } |
| 314 | |
| 315 | bool same_day = false; |
| 316 | UseRecord record; |
| 317 | if (HANDLE_EINTR(read(fd, &record, sizeof(record))) == sizeof(record)) { |
| 318 | if (record.day_ == day) { |
| 319 | // If there's an existing record for today, aggregates the usage |
| 320 | // time. |
| 321 | same_day = true; |
| 322 | record.seconds_ += seconds; |
| 323 | } else { |
| 324 | // If there's an existing record for a day in the past, rounds |
| 325 | // the usage to the nearest minute and sends it to UMA. |
| 326 | int minutes = |
| 327 | (record.seconds_ + kSecondsPerMinute / 2) / kSecondsPerMinute; |
| 328 | PublishMetric("Logging.DailyUseTime", |
| 329 | minutes, 1, kMinutesPerDay, 50); |
| 330 | |
| 331 | // Truncates the usage file to ensure that no duplicate usage is |
| 332 | // sent to UMA. |
| 333 | LOG_IF(WARNING, HANDLE_EINTR(ftruncate(fd, 0)) != 0); |
| 334 | } |
| 335 | } |
| 336 | |
| 337 | // Updates the use record in the daily usage file if there's new |
| 338 | // usage today. |
| 339 | if (seconds > 0) { |
| 340 | if (!same_day) { |
| 341 | record.day_ = day; |
| 342 | record.seconds_ = seconds; |
| 343 | } |
| 344 | // else an already existing record for the same day will be |
| 345 | // overwritten with updated usage below. |
| 346 | |
| 347 | LOG_IF(WARNING, HANDLE_EINTR(lseek(fd, 0, SEEK_SET)) != 0); |
| 348 | LOG_IF(WARNING, |
| 349 | HANDLE_EINTR(write(fd, &record, sizeof(record))) != sizeof(record)); |
| 350 | } |
| 351 | |
| 352 | HANDLE_EINTR(close(fd)); |
| 353 | |
| 354 | // Remembers the day of the use record in the usage aggregation file |
| 355 | // to reduce file I/O. This is not really useful now but potentially |
| 356 | // allows frequent LogDailyUseRecord calls with no unnecessary I/O |
| 357 | // overhead. |
| 358 | daily_use_day_last_ = day; |
| 359 | } |
| 360 | |
| 361 | // static |
| 362 | gboolean MetricsDaemon::UseMonitorStatic(gpointer data) { |
| 363 | return static_cast<MetricsDaemon*>(data)->UseMonitor() ? TRUE : FALSE; |
| 364 | } |
| 365 | |
| 366 | bool MetricsDaemon::UseMonitor() { |
| 367 | SetUserActiveState(user_active_, time(NULL)); |
| 368 | |
| 369 | // If a new monitor source/instance is scheduled, returns false to |
| 370 | // tell GLib to destroy this monitor source/instance. Returns true |
| 371 | // otherwise to keep calling back this monitor. |
| 372 | return !ScheduleUseMonitor(usemon_interval_ * 2, /* backoff */ true); |
| 373 | } |
| 374 | |
| 375 | bool MetricsDaemon::ScheduleUseMonitor(int interval, bool backoff) |
| 376 | { |
| 377 | // Caps the interval -- the bigger the interval, the more active use |
| 378 | // time will be potentially dropped on system shutdown. |
| 379 | if (interval > kUseMonitorIntervalMax) |
| 380 | interval = kUseMonitorIntervalMax; |
| 381 | |
| 382 | if (backoff) { |
| 383 | // Back-off mode is used by the use monitor to reschedule itself |
| 384 | // with exponential back-off in time. This mode doesn't create a |
| 385 | // new timeout source if the new interval is the same as the old |
| 386 | // one. Also, if a new timeout source is created, the old one is |
| 387 | // not destroyed explicitly here -- it will be destroyed by GLib |
| 388 | // when the monitor returns FALSE (see UseMonitor and |
| 389 | // UseMonitorStatic). |
| 390 | if (interval == usemon_interval_) |
| 391 | return false; |
| 392 | } else { |
| 393 | UnscheduleUseMonitor(); |
| 394 | } |
| 395 | |
| 396 | // Schedules a new use monitor for |interval| seconds from now. |
| 397 | DLOG(INFO) << "scheduling use monitor in " << interval << " seconds"; |
| 398 | usemon_source_ = g_timeout_source_new_seconds(interval); |
| 399 | g_source_set_callback(usemon_source_, UseMonitorStatic, this, |
| 400 | NULL); // No destroy notification. |
| 401 | g_source_attach(usemon_source_, |
| 402 | NULL); // Default context. |
| 403 | usemon_interval_ = interval; |
| 404 | return true; |
| 405 | } |
| 406 | |
| 407 | void MetricsDaemon::UnscheduleUseMonitor() { |
| 408 | // If there's a use monitor scheduled already, destroys it. |
| 409 | if (usemon_source_ == NULL) |
| 410 | return; |
| 411 | |
| 412 | DLOG(INFO) << "destroying use monitor"; |
| 413 | g_source_destroy(usemon_source_); |
| 414 | usemon_source_ = NULL; |
| 415 | usemon_interval_ = 0; |
| 416 | } |
| 417 | |
Darin Petkov | c2526a1 | 2010-04-21 14:24:04 -0700 | [diff] [blame] | 418 | void MetricsDaemon::PublishMetric(const char* name, int sample, |
| 419 | int min, int max, int nbuckets) { |
Darin Petkov | 41e0623 | 2010-05-03 16:45:37 -0700 | [diff] [blame^] | 420 | DLOG(INFO) << "received metric: " << name << " " << sample << " " |
| 421 | << min << " " << max << " " << nbuckets; |
Darin Petkov | 703ec97 | 2010-04-27 11:02:18 -0700 | [diff] [blame] | 422 | if (!testing_) { |
Darin Petkov | c2526a1 | 2010-04-21 14:24:04 -0700 | [diff] [blame] | 423 | MetricsLibrary::SendToChrome(name, sample, min, max, nbuckets); |
| 424 | } |
Darin Petkov | 65b0146 | 2010-04-14 13:32:20 -0700 | [diff] [blame] | 425 | } |