cmds/statsd/src/atoms.proto

/*
 * Copyright (C) 2017 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

syntax = "proto2";

// TODO: Not the right package and class name
package android.os.statsd;
option java_package = "com.android.os";
option java_outer_classname = "AtomsProto";

import "frameworks/base/core/proto/android/app/activitymanager.proto";

/**
 * The master atom class. This message defines all of the available
 * raw stats log events from the Android system, also known as "atoms."
 *
 * This field contains a single oneof with all of the available messages.
 * The stats-log-api-gen tool runs as part of the Android build and
 * generates the android.util.StatsLog class, which contains the constants
 * and methods that Android uses to log.
 *
 * This Atom class is not actually built into the Android system.
 * Instead, statsd on Android constructs these messages synthetically,
 * in the format defined here and in stats_log.proto.
 */
message Atom {
    // Pushed atoms start at 2.
    oneof pushed {
        // For StatsLog reasons, 1 is illegal and will not work. Must start at 2.
        BleScanStateChanged ble_scan_state_changed = 2;
        BleUnoptimizedScanStateChanged ble_unoptimized_scan_state_changed = 3;
        BleScanResultReceived ble_scan_result_received = 4;
        SensorStateChanged sensor_state_changed = 5;
        GpsScanStateChanged gps_scan_state_changed = 6; // TODO: untested
        SyncStateChanged sync_state_changed = 7;
        ScheduledJobStateChanged scheduled_job_state_changed = 8;
        ScreenBrightnessChanged screen_brightness_changed = 9;
        WakelockStateChanged wakelock_state_changed = 10;
        LongPartialWakelockStateChanged long_partial_wakelock_state_changed = 11;
        MobileRadioPowerStateChanged mobile_radio_power_state_changed = 12;
        WifiRadioPowerStateChanged wifi_radio_power_state_changed = 13;
        // TODO: 14-19 are blank, but need not be
        BatterySaverModeStateChanged battery_saver_mode_state_changed = 20;
        DeviceIdleModeStateChanged device_idle_mode_state_changed = 21;
        DeviceIdlingModeStateChanged device_idling_mode_state_changed = 22;
        AudioStateChanged audio_state_changed = 23;
        MediaCodecActivityChanged media_codec_activity_changed = 24;
        CameraStateChanged camera_state_changed = 25;
        FlashlightStateChanged flashlight_state_changed = 26;
        UidProcessStateChanged uid_process_state_changed = 27;
        ProcessLifeCycleStateChanged process_life_cycle_state_changed = 28;
        ScreenStateChanged screen_state_changed = 29;
        BatteryLevelChanged battery_level_changed = 30;
        ChargingStateChanged charging_state_changed = 31;
        PluggedStateChanged plugged_state_changed = 32;
        DeviceTemperatureReported device_temperature_reported = 33;
        DeviceOnStatusChanged device_on_status_changed = 34;
        WakeupAlarmOccurred wakeup_alarm_occurred = 35;
        KernelWakeupReported kernel_wakeup_reported = 36;
        WifiLockStateChanged wifi_lock_state_changed = 37;
        WifiSignalStrengthChanged wifi_signal_strength_changed = 38;
        WifiScanStateChanged wifi_scan_state_changed = 39;
        PhoneSignalStrengthChanged phone_signal_strength_changed = 40;
        SettingChanged setting_changed = 41;
        ActivityForegroundStateChanged activity_foreground_state_changed = 42;
        IsolatedUidChanged isolated_uid_changed = 43;
        PacketWakeupOccurred packet_wakeup_occurred = 44;
        DropboxErrorChanged dropbox_error_changed = 45;
        AnomalyDetected anomaly_detected = 46;
        AppHook app_hook = 47;
        AppStartChanged app_start_changed = 48;
        AppStartCancelChanged app_start_cancel_changed = 49;
        AppStartFullyDrawnChanged app_start_fully_drawn_changed = 50;
        // TODO: Reorder the numbering so that the most frequent occur events occur in the first 15.
    }

    // Pulled events will start at field 10000.
    oneof pulled {
        WifiBytesTransfer wifi_bytes_transfer = 10000;
        WifiBytesTransferByFgBg wifi_bytes_transfer_by_fg_bg = 10001;
        MobileBytesTransfer mobile_bytes_transfer = 10002;
        MobileBytesTransferByFgBg mobile_bytes_transfer_by_fg_bg = 10003;
        KernelWakelock kernel_wakelock = 10004;
        PlatformSleepState platform_sleep_state = 10005;
        SleepStateVoter sleep_state_voter = 10006;
        SubsystemSleepState subsystem_sleep_state = 10007;
        CpuTimePerFreq cpu_time_per_freq = 10008;
        CpuTimePerUid cpu_time_per_uid = 10009;
        CpuTimePerUidFreq cpu_time_per_uid_freq = 10010;
        WifiActivityEnergyInfo wifi_activity_energy_info = 10011;
        ModemActivityInfo modem_activity_info = 10012;
    }
}

/**
 * This proto represents a node of an attribution chain.
 * Note: All attribution chains are represented as a repeated field of type
 * AttributionNode. It is understood that in such arrays, the order is that
 * of calls, that is [A, B, C] if A calls B that calls C.
 */
message AttributionNode {
    // The uid for a given element in the attribution chain.
    optional int32 uid = 1;

    // The (optional) string tag for an element in the attribution chain. If the
    // element has no tag, it is encoded as an empty string.
    optional string tag = 2;
}

/*
 * *****************************************************************************
 * Below are all of the individual atoms that are logged by Android via statsd.
 *
 * RULES:
 *   - The field ids for each atom must start at 1, and count upwards by 1.
 *     Skipping field ids is not allowed.
 *   - These form an API, so renaming, renumbering or removing fields is
 *     not allowed between android releases.  (This is not currently enforced,
 *     but there will be a tool to enforce this restriction).
 *   - The types must be built-in protocol buffer types, namely, no sub-messages
 *     are allowed (yet).  The bytes type is also not allowed.
 *   - The CamelCase name of the message type should match the
 *     underscore_separated name as defined in Atom.
 *   - If an atom represents work that can be attributed to an app, there can
 *     be exactly one AttributionChain field. It must be field number 1.
 *   - A field that is a uid should be a string field, tagged with the [xxx]
 *     annotation. The generated code on android will be represented by UIDs,
 *     and those UIDs will be translated in xxx to those strings.
 *
 * CONVENTIONS:
 *   - Events are past tense. e.g. ScreenStateChanged, not ScreenStateChange.
 *   - If there is a UID, it goes first. Think in an object-oriented fashion.
 * *****************************************************************************
 */

/**
 * Logs when the screen state changes.
 *
 * Logged from:
 *   frameworks/base/services/core/java/com/android/server/am/BatteryStatsService.java
 */
message ScreenStateChanged {
    // TODO: Use the real screen state.
    enum State {
        STATE_UNKNOWN = 0;
        STATE_OFF = 1;
        STATE_ON = 2;
        STATE_DOZE = 3;
        STATE_DOZE_SUSPEND = 4;
        STATE_VR = 5;
        STATE_ON_SUSPEND = 6;
    }
    // New screen state.
    optional State display_state = 1;
}

/**
 * Logs that the state of a process state, as per the activity manager, has changed.
 *
 * Logged from:
 *   frameworks/base/services/core/java/com/android/server/am/BatteryStatsService.java
 */
message UidProcessStateChanged {
    optional int32 uid = 1; // TODO: should be a string tagged w/ uid annotation

    // The state.
    // TODO: Use the real (mapped) process states.
    optional android.app.ProcessState state = 2;
}

/**
 * Logs that a process started, finished, crashed, or ANRed.
 *
 * Logged from:
 *   frameworks/base/services/core/java/com/android/server/am/BatteryStatsService.java
 */
message ProcessLifeCycleStateChanged {
    // TODO: Use the real (mapped) process states.
    optional int32 uid = 1; // TODO: should be a string tagged w/ uid annotation

    // TODO: What is this?
    optional string name = 2;

    // What lifecycle state the process changed to.
    // This enum is specific to atoms.proto.
    enum Event {
        PROCESS_FINISHED = 0;
        PROCESS_STARTED = 1;
        PROCESS_CRASHED = 2;
        PROCESS_ANRED = 3;
    }
    optional Event event = 3;
}

/**
 * Logs when the ble scan state changes.
 *
 * Logged from:
 *   frameworks/base/core/java/com/android/internal/os/BatteryStatsImpl.java
 */
message BleScanStateChanged {
    repeated AttributionNode attribution_node = 1;

    enum State {
        OFF = 0;
        ON = 1;
    }
    optional State state = 2;
}

/**
 * Logs when an unoptimized ble scan state changes.
 *
 * Logged from:
 *   frameworks/base/core/java/com/android/internal/os/BatteryStatsImpl.java
 */
// TODO: Consider changing to tracking per-scanner-id (log from AppScanStats).
message BleUnoptimizedScanStateChanged {
    repeated AttributionNode attribution_node = 1;

    enum State {
        OFF = 0;
        ON = 1;
    }
    optional State state = 2;
}

/**
 * Logs reporting of a ble scan finding results.
 *
 * Logged from:
 *   frameworks/base/core/java/com/android/internal/os/BatteryStatsImpl.java
 */
// TODO: Consider changing to tracking per-scanner-id (log from AppScanStats).
message BleScanResultReceived {
    repeated AttributionNode attribution_node = 1;

    // Number of ble scan results returned.
    optional int32 num_of_results = 2;
}

/**
 * Logs when a sensor state changes.
 *
 * Logged from:
 *   frameworks/base/core/java/com/android/internal/os/BatteryStatsImpl.java
 */
message SensorStateChanged {
    repeated AttributionNode attribution_node = 1;

    // TODO: Is there a way to get the actual name of the sensor?
    // The id (int) of the sensor.
    optional int32 sensor_id = 2;

    enum State {
        OFF = 0;
        ON = 1;
    }
    optional State state = 3;
}


/**
 * Logs when GPS state changes.
 *
 * Logged from:
 *   frameworks/base/core/java/com/android/internal/os/BatteryStatsImpl.java
 */
message GpsScanStateChanged {
    repeated AttributionNode attribution_node = 1;

    enum State {
        OFF = 0;
        ON = 1;
    }
    optional State state = 2;
}


/**
 * Logs when a sync manager sync state changes.
 *
 * Logged from:
 *   frameworks/base/core/java/com/android/internal/os/BatteryStatsImpl.java
 */
message SyncStateChanged {
    repeated AttributionNode attribution_node = 1;

    // Name of the sync (as named in the app)
    optional string name = 2;

    enum State {
        OFF = 0;
        ON = 1;
    }
    optional State state = 3;
}

/**
 * Logs when a job scheduler job state changes.
 *
 * Logged from:
 *   frameworks/base/core/java/com/android/internal/os/BatteryStatsImpl.java
 */
message ScheduledJobStateChanged {
    repeated AttributionNode attribution_node = 1;

    // Name of the job (as named in the app)
    optional string name = 2;

    enum State {
        FINISHED = 0;
        STARTED = 1;
        SCHEDULED = 2;
    }
    optional State state = 3;

    // TODO: Consider adding the stopReason (int)
}

/**
 * Logs when the audio state changes.
 *
 * Logged from:
 *   frameworks/base/core/java/com/android/internal/os/BatteryStatsImpl.java
 */
message AudioStateChanged {
    repeated AttributionNode attribution_node = 1;

    enum State {
        OFF = 0;
        ON = 1;
    }
    optional State state = 2;
}

/**
 * Logs when the video codec state changes.
 *
 * Logged from:
 *   frameworks/base/core/java/com/android/internal/os/BatteryStatsImpl.java
 */
message MediaCodecActivityChanged {
    repeated AttributionNode attribution_node = 1;

    enum State {
        OFF = 0;
        ON = 1;
    }
    optional State state = 2;
}

/**
 * Logs when the flashlight state changes.
 *
 * Logged from:
 *   frameworks/base/core/java/com/android/internal/os/BatteryStatsImpl.java
 */
message FlashlightStateChanged {
    repeated AttributionNode attribution_node = 1;

    enum State {
        OFF = 0;
        ON = 1;
    }
    optional State state = 2;
}

/**
 * Logs when the camera state changes.
 *
 * Logged from:
 *   frameworks/base/core/java/com/android/internal/os/BatteryStatsImpl.java
 */
message CameraStateChanged {
    repeated AttributionNode attribution_node = 1;

    enum State {
        OFF = 0;
        ON = 1;
    }
    optional State state = 2;
}

/**
 * Logs that the state of a wakelock (per app and per wakelock name) has changed.
 *
 * Logged from:
 *   TODO
 */
message WakelockStateChanged {
    repeated AttributionNode attribution_node = 1;

    // Type of wakelock.
    enum Type {
        PARTIAL = 0;
        FULL = 1;
        WINDOW = 2;
    }
    optional Type type = 2;

    // The wakelock tag (Called tag in the Java API, sometimes name elsewhere).
    optional string tag = 3;

    enum State {
        RELEASE = 0;
        ACQUIRE = 1;
        CHANGE_RELEASE = 2;
        CHANGE_ACQUIRE = 3;
    }
    optional State state = 4;
}

/**
 * Logs when a partial wakelock is considered 'long' (over 1 min).
 *
 * Logged from:
 *   frameworks/base/core/java/com/android/internal/os/BatteryStatsImpl.java
 */
message LongPartialWakelockStateChanged {
    repeated AttributionNode attribution_node = 1;

    // The wakelock tag (Called tag in the Java API, sometimes name elsewhere).
    optional string tag = 2;

    // TODO: I have no idea what this is.
    optional string history_tag = 3;

    enum State {
        OFF = 0;
        ON = 1;
    }
    optional State state = 4;
}

/**
 * Logs Battery Saver state change.
 *
 * Logged from:
 *   frameworks/base/core/java/com/android/internal/os/BatteryStatsImpl.java
 */
message BatterySaverModeStateChanged {
    enum State {
        OFF = 0;
        ON = 1;
    }
    optional State state = 1;
}

/**
 * Logs Doze mode state change.
 *
 * Logged from:
 *   frameworks/base/core/java/com/android/internal/os/BatteryStatsImpl.java
 */
message DeviceIdleModeStateChanged {
    // TODO: Use the enum matching BatteryStats.DEVICE_IDLE_MODE_.
    enum State {
        DEVICE_IDLE_MODE_OFF = 0;
        DEVICE_IDLE_MODE_LIGHT = 1;
        DEVICE_IDLE_MODE_DEEP = 2;
    }
    optional State state = 1;
}


/**
 * Logs state change of Doze mode including maintenance windows.
 *
 * Logged from:
 *   frameworks/base/core/java/com/android/internal/os/BatteryStatsImpl.java
 */
message DeviceIdlingModeStateChanged {
    // TODO: Use the enum matching BatteryStats.DEVICE_IDLE_MODE_.
    enum State {
        DEVICE_IDLE_MODE_OFF = 0;
        DEVICE_IDLE_MODE_LIGHT = 1;
        DEVICE_IDLE_MODE_DEEP = 2;
    }
    optional State state = 1;
}

/**
 * Logs screen brightness level.
 *
 * Logged from:
 *   frameworks/base/services/core/java/com/android/server/am/BatteryStatsService.java
 */
message ScreenBrightnessChanged {
    // Screen brightness level. Should be in [-1, 255] according to PowerManager.java.
    optional int32 level = 1;
}

/**
 * Logs battery level (percent full, from 0 to 100).
 *
 * Logged from:
 *   frameworks/base/core/java/com/android/internal/os/BatteryStatsImpl.java
 */
message BatteryLevelChanged {
    // Battery level. Should be in [0, 100].
    optional int32 battery_level = 1;
}

/**
 * Logs change in charging status of the device.
 *
 * Logged from:
 *   frameworks/base/core/java/com/android/internal/os/BatteryStatsImpl.java
 */
message ChargingStateChanged {
    // TODO: Link directly to BatteryManager.java's constants (via a proto).
    enum State {
        BATTERY_STATUS_UNKNOWN = 1;
        BATTERY_STATUS_CHARGING = 2;
        BATTERY_STATUS_DISCHARGING = 3;
        BATTERY_STATUS_NOT_CHARGING = 4;
        BATTERY_STATUS_FULL = 5;
    }
    optional State charging_state = 1;
}

/**
 * Logs whether the device is plugged in, and what power source it is using.
 *
 * Logged from:
 *   frameworks/base/core/java/com/android/internal/os/BatteryStatsImpl.java
 */
message PluggedStateChanged {
    // TODO: Link directly to BatteryManager.java's constants (via a proto).
    enum State {
        // Note that NONE is not in BatteryManager.java's constants.
        BATTERY_PLUGGED_NONE = 0;
        // Power source is an AC charger.
        BATTERY_PLUGGED_AC = 1;
        // Power source is a USB port.
        BATTERY_PLUGGED_USB = 2;
        // Power source is wireless.
        BATTERY_PLUGGED_WIRELESS = 4;
    }
    optional State plugged_state = 1;
}

/**
 * Logs the temperature of the device, in tenths of a degree Celsius.
 *
 * Logged from:
 *   frameworks/base/core/java/com/android/internal/os/BatteryStatsImpl.java
 */
message DeviceTemperatureReported {
    // Temperature in tenths of a degree C.
    optional int32 temperature = 1;
}

// TODO: Define this more precisely.
// TODO: Log the ON state somewhere. It isn't currently logged anywhere.
/**
 * Logs when the device turns off or on.
 *
 * Logged from:
 *   frameworks/base/services/core/java/com/android/server/am/ActivityManagerService.java
 */
message DeviceOnStatusChanged {
    enum State {
        OFF = 0;
        ON = 1;
    }
    optional State state = 1;
}

/**
 * Logs when an app's wakeup alarm fires.
 *
 * Logged from:
 *   frameworks/base/services/core/java/com/android/server/am/ActivityManagerService.java
 */
message WakeupAlarmOccurred {
    repeated AttributionNode attribution_node = 1;

    // Name of the wakeup alarm.
    optional string tag = 2;
}

/**
 * Logs when an an app causes the mobile radio to change state.
 * Changing from LOW to MEDIUM or HIGH can be considered the app waking the mobile radio.
 *
 * Logged from:
 *   frameworks/base/core/java/com/android/internal/os/BatteryStatsImpl.java
 */
message MobileRadioPowerStateChanged {
    // TODO: Add attribution instead of uid?
    optional int32 uid = 1;

    // TODO: Reference telephony/java/android/telephony/DataConnectionRealTimeInfo.java states.
    enum PowerState {
        DC_POWER_STATE_LOW = 1;
        DC_POWER_STATE_MEDIUM = 2;
        DC_POWER_STATE_HIGH = 3;
    }
    optional PowerState power_state = 2;
}

/**
 * Logs when an an app causes the wifi radio to change state.
 * Changing from LOW to MEDIUM or HIGH can be considered the app waking the wifi radio.
 *
 * Logged from:
 *   frameworks/base/core/java/com/android/internal/os/BatteryStatsImpl.java
 */
message WifiRadioPowerStateChanged {
    // TODO: Add attribution instead of uid?
    optional int32 uid = 1;

    // TODO: Reference telephony/java/android/telephony/DataConnectionRealTimeInfo.java states.
    enum PowerState {
        DC_POWER_STATE_LOW = 1;
        DC_POWER_STATE_MEDIUM = 2;
        DC_POWER_STATE_HIGH = 3;
    }
    optional PowerState power_state = 2;
}

/**
 * Logs kernel wakeup reasons and aborts.
 *
 * Logged from:
 *   frameworks/base/services/core/java/com/android/server/am/BatteryStatsService.java
 */
message KernelWakeupReported {
    // Name of the kernel wakeup reason (or abort).
    optional string wakeup_reason_name = 1;

    // Duration (in microseconds) for the wake-up interrupt to be serviced.
    optional int64 duration_usec = 2;
}

/**
 * Logs wifi locks held by an app.
 *
 * Logged from:
 *   frameworks/base/core/java/com/android/internal/os/BatteryStatsImpl.java
 */
message WifiLockStateChanged {
    repeated AttributionNode attribution_node = 1;

    enum State {
        OFF = 0;
        ON = 1;
    }
    optional State state = 2;
}

/**
 * Logs wifi signal strength changes.
 *
 * Logged from:
 *   frameworks/base/core/java/com/android/internal/os/BatteryStatsImpl.java
 */
message WifiSignalStrengthChanged {
    // TODO: Reference the actual telephony/java/android/telephony/SignalStrength.java states.
    enum SignalStrength {
        SIGNAL_STRENGTH_NONE_OR_UNKNOWN = 0;
        SIGNAL_STRENGTH_POOR = 1;
        SIGNAL_STRENGTH_MODERATE = 2;
        SIGNAL_STRENGTH_GOOD = 3;
        SIGNAL_STRENGTH_GREAT = 4;
    }
    optional SignalStrength signal_strength = 1;
}

/**
 * Logs wifi scans performed by an app.
 *
 * Logged from:
 *   frameworks/base/core/java/com/android/internal/os/BatteryStatsImpl.java
 */
message WifiScanStateChanged {
    repeated AttributionNode attribution_node = 1;

    enum State {
        OFF = 0;
        ON = 1;
    }
    optional State state = 2;
}

/**
 * Logs phone signal strength changes.
 *
 * Logged from:
 *   frameworks/base/core/java/com/android/internal/os/BatteryStatsImpl.java
 */
message PhoneSignalStrengthChanged {
    // TODO: Reference the actual telephony/java/android/telephony/SignalStrength.java states.
    enum SignalStrength {
        SIGNAL_STRENGTH_NONE_OR_UNKNOWN = 0;
        SIGNAL_STRENGTH_POOR = 1;
        SIGNAL_STRENGTH_MODERATE = 2;
        SIGNAL_STRENGTH_GOOD = 3;
        SIGNAL_STRENGTH_GREAT = 4;
    }
    optional SignalStrength signal_strength = 1;
}

/**
 * Logs that a setting was updated.
 * Logged from:
 *   frameworks/base/core/java/android/provider/Settings.java
 * The tag and is_default allow resetting of settings to default values based on the specified
 * tag. See Settings#putString(ContentResolver, String, String, String, boolean) for more details.
 */
message SettingChanged {
    // The name of the setting.
    optional string setting = 1;

    // The change being imposed on this setting. May represent a number, eg "3".
    optional string value = 2;

    // The new value of this setting. For most settings, this is same as value. For some settings,
    // value is +X or -X where X represents an element in a set. For example, if the previous value
    // is A,B,C and value is -B, then new_value is A,C and prev_value is A,B,C.
    // The +/- feature is currently only used for location_providers_allowed.
    optional string new_value = 3;

    // The previous value of this setting.
    optional string prev_value = 4;

    // The tag used with the is_default for resetting sets of settings. This is generally null.
    optional string tag = 5;

    // 1 indicates that this setting with tag should be resettable.
    optional int32 is_default = 6;

    // The user ID associated. Defined in android/os/UserHandle.java
    optional int32 user = 7;
}

/**
 * Logs activity going to foreground or background
 *
 * Logged from:
  *   frameworks/base/services/core/java/com/android/server/am/ActivityRecord.java
 */
message ActivityForegroundStateChanged {
    optional int32 uid = 1;
    optional string pkg_name = 2;
    optional string class_name = 3;

    enum Activity {
        MOVE_TO_BACKGROUND = 0;
        MOVE_TO_FOREGROUND = 1;
    }
    optional Activity activity = 4;
}

/**
 * Logs when an error is written to dropbox.
 * Logged from:
 *      frameworks/base/services/core/java/com/android/server/am/ActivityManagerService.java
 */
message DropboxErrorChanged {
    // The uid if available. -1 means not available.
    optional int32 uid = 1;

    // Tag used when recording this error to dropbox. Contains data_ or system_ prefix.
    optional string tag = 2;

    // The name of the process.
    optional string process_name = 3;

    // The pid if available. -1 means not available.
    optional sint32 pid = 4;

    // 1 indicates is instant app. -1 indicates Not applicable.
    optional sint32 is_instant_app = 5;

    // The activity name if available.
    optional string activity_name = 6;

    // The package name if available.
    optional string package_name = 7;

    // 1 indicates in foreground. -1 indicates not available.
    optional sint32 is_foreground = 8;
}

/*
 * Allows other apps to push events into statsd.
 * Logged from:
 *      frameworks/base/core/java/android/util/StatsLog.java
 */
message AppHook {
    // The uid of the application that sent this custom atom.
    optional int32 uid = 1;

    // An arbitrary label chosen by the developer. For Android P, the label should be in [0, 16).
    optional int32 label = 2;

    // Allows applications to easily use a custom event as start/stop boundaries (ie, define custom
    // predicates for the metrics).
    enum State {
        UNKNOWN = 0;
        UNSPECIFIED = 1;  // For events that are known to not represent START/STOP.
        STOP = 2;
        START = 3;
    }
    optional State state = 3;
}

/**
 * Logs when statsd detects an anomaly.
 *
 * Logged from:
 *   frameworks/base/cmds/statsd/src/anomaly/AnomalyTracker.cpp
 */
message AnomalyDetected {
    // Uid that owns the config whose anomaly detection alert fired.
    optional int32 config_uid = 1;

    // Id of the config whose anomaly detection alert fired.
    optional int64 config_id = 2;

    // Id of the alert (i.e. name of the anomaly that was detected).
    optional int64 alert_id = 3;
}

message AppStartChanged {
    // The uid if available. -1 means not available.
    optional int32 uid = 1;

    // The app package name.
    optional string pkg_name = 2;

    enum TransitionType {
        APP_START_TRANSITION_TYPE_UNKNOWN = 0;
        WARM = 1;
        HOT = 2;
        COLD = 3;
    }
    // The transition type.
    optional TransitionType type = 3;

    // The activity name.
    optional string activity_name = 4;

    // The name of the calling app. Empty if not set.
    optional string calling_pkg_name = 5;

    // Whether the app is an instant app.
    optional bool is_instant_app = 6;

    // Device uptime when activity started.
    optional int64 activity_start_msec = 7;

    // TODO: Update android/app/ActivityManagerInternal.java constants to depend on our proto enum.
    enum TransitionReason {
        APP_START_TRANSITION_REASON_UNKNOWN = 0;
        SPLASH_SCREEN = 1;
        WINDOWS_DRAWN = 2;
        TIMEOUT = 3;
        SNAPSHOT = 4;
    }
    optional TransitionReason reason = 8;

    optional int32 transition_delay_msec = 9;
    // -1 if not set.
    optional int32 starting_window_delay_msec = 10;
    // -1 if not set.
    optional int32 bind_application_delay_msec = 11;
    optional int32 windows_drawn_delay_msec = 12;

    // Empty if not set.
    optional string launch_token = 13;

}

message AppStartCancelChanged {
    // The uid if available. -1 means not available.
    optional int32 uid = 1;

    // The app package name.
    optional string pkg_name = 2;

    enum TransitionType {
        APP_START_TRANSITION_TYPE_UNKNOWN = 0;
        WARM = 1;
        HOT = 2;
        COLD = 3;
    }
    // The transition type.
    optional TransitionType type = 3;

    // The activity name.
    optional string activity_name = 4;
}

message AppStartFullyDrawnChanged {
    // The uid if available. -1 means not available.
    optional int32 uid = 1;

    // The app package name.
    optional string pkg_name = 2;

    enum TransitionType {
        APP_START_TRANSITION_TYPE_UNKNOWN = 0;
        WITH_BUNDLE = 1;
        WITHOUT_BUNDLE = 2;
    }
    // The transition type.
    optional TransitionType type = 3;

    // The activity name.
    optional string activity_name = 4;

    optional bool transition_process_running = 5;

    // App startup time (until call to Activity#reportFullyDrawn()).
    optional int64 app_startup_time_ms = 6;
}

/**
 * Pulls bytes transferred via wifi (Sum of foreground and background usage).
 *
 * Pulled from:
 *   StatsCompanionService (using BatteryStats to get which interfaces are wifi)
 */
message WifiBytesTransfer {
    optional int32 uid = 1;

    optional int64 rx_bytes = 2;

    optional int64 rx_packets = 3;

    optional int64 tx_bytes = 4;

    optional int64 tx_packets = 5;
}

/**
 * Pulls bytes transferred via wifi (separated by foreground and background usage).
 *
 * Pulled from:
 *   StatsCompanionService (using BatteryStats to get which interfaces are wifi)
 */
message WifiBytesTransferByFgBg {
    optional int32 uid = 1;

    // 1 denotes foreground and 0 denotes background. This is called Set in NetworkStats.
    optional int32 is_foreground = 2;

    optional int64 rx_bytes = 3;

    optional int64 rx_packets = 4;

    optional int64 tx_bytes = 5;

    optional int64 tx_packets = 6;
}

/**
 * Pulls bytes transferred via mobile networks (Sum of foreground and background usage).
 *
 * Pulled from:
 *   StatsCompanionService (using BatteryStats to get which interfaces are mobile data)
 */
message MobileBytesTransfer {
    optional int32 uid = 1;

    optional int64 rx_bytes = 2;

    optional int64 rx_packets = 3;

    optional int64 tx_bytes = 4;

    optional int64 tx_packets = 5;
}

/**
 * Pulls bytes transferred via mobile networks (separated by foreground and background usage).
 *
 * Pulled from:
 *   StatsCompanionService (using BatteryStats to get which interfaces are mobile data)
 */
message MobileBytesTransferByFgBg {
    optional int32 uid = 1;

    // 1 denotes foreground and 0 denotes background. This is called Set in NetworkStats.
    optional int32 is_foreground = 2;

    optional int64 rx_bytes = 3;

    optional int64 rx_packets = 4;

    optional int64 tx_bytes = 5;

    optional int64 tx_packets = 6;
}

/**
 * Pulls the kernel wakelock durations. This atom is adapted from
 * android/internal/os/KernelWakelockStats.java
 *
 * Pulled from:
 *   StatsCompanionService using KernelWakelockReader.
 */
message KernelWakelock {
    optional string name = 1;

    optional int32 count = 2;

    optional int32 version = 3;

    optional int64 time = 4;
}

/**
 * Pulls PowerStatePlatformSleepState.
 *
 * Definition here:
 *   hardware/interfaces/power/1.0/types.hal
 */
message PlatformSleepState {
    optional string name = 1;
    optional uint64 residency_in_msec_since_boot = 2;
    optional uint64 total_transitions = 3;
    optional bool supported_only_in_suspend = 4;
}

/**
 * Pulls PowerStateVoter.
 *
 * Definition here:
 *   hardware/interfaces/power/1.0/types.hal
 */
message SleepStateVoter {
    optional string platform_sleep_state_name = 1;
    optional string voter_name = 2;
    optional uint64 total_time_in_msec_voted_for_since_boot = 3;
    optional uint64 total_number_of_times_voted_since_boot = 4;
}

/**
 * Pulls PowerStateSubsystemSleepState.
 *
 * Definition here:
 *   hardware/interfaces/power/1.1/types.hal
 */
message SubsystemSleepState {
    optional string subsystem_name = 1;
    optional string subsystem_sleep_state_name = 2;
    optional uint64 residency_in_msec_since_boot = 3;
    optional uint64 total_transitions = 4;
    optional uint64 last_entry_timestamp_ms = 5;
    optional bool supported_only_in_suspend = 6;
}

/**
 * Logs creation or removal of an isolated uid. Isolated uid's are temporary uid's to sandbox risky
 * behavior in its own uid. However, the metrics of these isolated uid's almost always should be
 * attributed back to the parent (host) uid. One example is Chrome.
 *
 * Logged from:
 *   frameworks/base/core/java/com/android/internal/os/BatteryStatsImpl.java
 */
message IsolatedUidChanged {
    // The host UID. Generally, we should attribute metrics from the isolated uid to the host uid.
    optional int32 parent_uid = 1;

    optional int32 isolated_uid = 2;

    // 1 denotes we're creating an isolated uid and 0 denotes removal. We expect an isolated uid to
    // be removed before if it's used for another parent uid.
    optional int32 is_create = 3;
}

/**
 * Pulls Cpu time per frequency.
 * Pulls the time the cpu spend on the frequency index. Frequency index
 * starts from highest to lowest. The value should be monotonically
 * increasing since boot. However, if there is a cpu
 * hotplug event, the value would be reset as well.
 */
message CpuTimePerFreq {
    optional uint32 cluster = 1;
    optional uint32 freq_index = 2;
    optional uint64 time_ms = 3;
}

/**
 * Pulls Cpu Time Per Uid.
 * Note that isolated process uid time should be attributed to host uids.
 */
message CpuTimePerUid {
    optional uint64 uid = 1;
    optional uint64 user_time_ms = 2;
    optional uint64 sys_time_ms = 3;
}

/**
 * Pulls Cpu Time Per Uid per frequency.
 * Note that isolated process uid time should be attributed to host uids.
 * For each uid, we order the time by descending frequencies.
 */
message CpuTimePerUidFreq {
    optional uint64 uid = 1;
    optional uint64 freq_idx = 2;
    optional uint64 time_ms = 3;
}

/*
 * Logs the reception of an incoming network packet causing the main system to wake up for
 * processing that packet. These events are notified by the kernel via Netlink NFLOG to Netd
 * and processed by WakeupController.cpp.
 */
message PacketWakeupOccurred {
    // The uid owning the socket into which the packet was delivered, or -1 if the packet was
    // delivered nowhere.
    optional int32 uid = 1;
    // The interface name on which the packet was received.
    optional string iface = 2;
    // The ethertype value of the packet.
    optional int32 ethertype = 3;
    // String representation of the destination MAC address of the packet.
    optional string destination_hardware_address = 4;
    // String representation of the source address of the packet if this was an IP packet.
    optional string source_ip = 5;
    // String representation of the destination address of the packet if this was an IP packet.
    optional string destination_ip = 6;
    // The value of the protocol field if this was an IPv4 packet or the value of the Next Header
    // field if this was an IPv6 packet. The range of possible values is the same for both IP
    // families.
    optional int32 ip_next_header = 7;
    // The source port if this was a TCP or UDP packet.
    optional int32 source_port = 8;
    // The destination port if this was a TCP or UDP packet.
    optional int32 destination_port = 9;
}

/**
 * Pulls Wifi Controller Activity Energy Info
 */
message WifiActivityEnergyInfo {
    // timestamp(wall clock) of record creation
    optional uint64 timestamp_ms = 1;
    // stack reported state
    // TODO: replace this with proto enum
    optional int32 stack_state = 2;
    // tx time in ms
    optional uint64 controller_tx_time_ms = 3;
    // rx time in ms
    optional uint64 controller_rx_time_ms = 4;
    // idle time in ms
    optional uint64 controller_idle_time_ms = 5;
    // product of current(mA), voltage(V) and time(ms)
    optional uint64 controller_energy_used = 6;
}

/**
 * Pulls Modem Activity Energy Info
 */
message ModemActivityInfo {
    // timestamp(wall clock) of record creation
    optional uint64 timestamp_ms = 1;
    // sleep time in ms.
    optional uint64 sleep_time_ms = 2;
    // idle time in ms
    optional uint64 controller_idle_time_ms = 3;
    /**
     * Tx power index
     * index 0 = tx_power < 0dBm
     * index 1 = 0dBm < tx_power < 5dBm
     * index 2 = 5dBm < tx_power < 15dBm
     * index 3 = 15dBm < tx_power < 20dBm
     * index 4 = tx_power > 20dBm
     */
    // tx time in ms at power level 0
    optional uint64 controller_tx_time_pl0_ms = 4;
    // tx time in ms at power level 1
    optional uint64 controller_tx_time_pl1_ms = 5;
    // tx time in ms at power level 2
    optional uint64 controller_tx_time_pl2_ms = 6;
    // tx time in ms at power level 3
    optional uint64 controller_tx_time_pl3_ms = 7;
    // tx time in ms at power level 4
    optional uint64 controller_tx_time_pl4_ms = 8;
    // rx time in ms at power level 5
    optional uint64 controller_rx_time_ms = 9;
    // product of current(mA), voltage(V) and time(ms)
    optional uint64 energy_used = 10;
}