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Commit 3ddecff5 authored by Siarhei Vishniakou's avatar Siarhei Vishniakou
Browse files

Touch event latency metrics 

Add a basic metric about touch event latency.

Metric design doc:
https://docs.google.com/document/d/1funj0dM9oZMiivhz43U5WM2wA2zWiPWsOxO-Jl5PmbY/edit#

Bug: 111431676
Bug: 122748138
Test: manual test following procedures in the doc
Change-Id: Ifc2643b53c2211f67355b27c2ab4e706c00eae97
parent a2eeced7

cmds/statsd/src/atoms.proto

+28 −1
Original line number Diff line number Diff line
@@ -91,7 +91,7 @@ message Atom { 
        ChargingStateChanged charging_state_changed = 31;

        PluggedStateChanged plugged_state_changed = 32;

        InteractiveStateChanged interactive_state_changed = 33;

        // 34 is available

        TouchEventReported touch_event_reported = 34;

        WakeupAlarmOccurred wakeup_alarm_occurred = 35;

        KernelWakeupReported kernel_wakeup_reported = 36;

        WifiLockStateChanged wifi_lock_state_changed = 37;
@@ -1734,6 +1734,33 @@ message SettingsUIChanged { 
    optional int64 changed_preference_int_value = 5;

}



/**

 * Logs basic timing information about touch events.

 * Reported at most every 5 minutes while device is being interacted with.

 *

 * Logged from:

 *   frameworks/native/services/inputflinger

 */

message TouchEventReported {

    /**

     * The fields latency_{min|max|mean|stdev} represent minimum, maximum, mean,

     * and the standard deviation of latency between the kernel and framework

     * for touchscreen events. The units are microseconds.

     *

     * The number is measured as the difference between the time at which

     * the input event was received in the evdev driver,

     * and the time at which the input event was received in EventHub.

     */

    // Minimum value

    optional float latency_min_micros = 1;

    // Maximum value

    optional float latency_max_micros = 2;

    // Average value

    optional float latency_mean_micros = 3;

    // Standard deviation

    optional float latency_stdev_micros = 4;

}



/**

 * Logs that a setting was updated.

 * Logged from: