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-- Copyright 2024 The Chromium Authors
-- Use of this source code is governed by a BSD-style license that can be
-- found in the LICENSE file.
INCLUDE PERFETTO MODULE slices.with_context;
-- This module defines tables with information about Android input pipeline
-- steps. The trace needs to be recorded with the 'view' atrace category.
-- On Android, input goes through the following path before getting to Chrome:
-- * InputReader thread (part of Android system_server)
-- * InputDispatcher thread (part of Android system_server)
-- * Browser Main thread (Chromium/Chrome)
-- In traces, each of these three steps have slices which are implicitly linked
-- together by an input id (part of slice name) assigned by the Android system.
-- The following queries correlate the three steps mentioned above
-- with the rest of the `LatencyInfo.Flow` pipeline.
-- InputReader is the first step in the input pipeline.
-- It is responsible for reading the input events from the system_server
-- process and sending them to the InputDispatcher (which then sends them
-- to the browser process).
CREATE PERFETTO TABLE _chrome_android_motion_input_reader_step (
-- Input reader step timestamp.
ts TIMESTAMP,
-- Input reader step duration.
dur DURATION,
-- Input reader step slice id.
id LONG,
-- Input id.
android_input_id STRING,
-- Input reader step utid.
utid LONG
) AS
SELECT
ts,
dur,
id,
-- Get the substring that starts with 'id=', remove the 'id=' and remove the trailing ')'.
-- 'id=0x344bb0f9)' -> '0x344bb0f9'
trim(substr(substr(name, instr(name, 'id=')), 4), ')') AS android_input_id,
utid
FROM thread_slice AS slice
WHERE
name GLOB 'UnwantedInteractionBlocker::notifyMotion*';
-- InputDispatcher is the second step in the input pipeline.
-- It is responsible for dispatching the input events to the browser process.
CREATE PERFETTO TABLE _chrome_android_motion_input_dispatcher_step (
-- Input dispatcher step timestamp.
ts TIMESTAMP,
-- Input dispatcher step duration.
dur DURATION,
-- Input dispatcher step slice id.
id LONG,
-- Input id.
android_input_id STRING,
-- Input dispatcher step utid.
utid LONG
) AS
SELECT
ts,
dur,
id,
trim(substr(substr(name, instr(name, 'id=')), 4), ')') AS android_input_id,
utid
FROM thread_slice AS slice
WHERE
name GLOB 'prepareDispatchCycleLocked*chrome*';
-- DeliverInputEvent is the third step in the input pipeline.
-- It is responsible for routing the input events within browser process.
CREATE PERFETTO TABLE chrome_deliver_android_input_event (
-- Timestamp.
ts TIMESTAMP,
-- Touch move processing duration.
dur DURATION,
-- Utid.
utid LONG,
-- Input id (assigned by the system, used by InputReader and InputDispatcher)
android_input_id STRING
) AS
SELECT
slice.ts,
slice.dur,
slice.utid,
substr(substr(name, instr(name, 'id=')), 4) AS android_input_id
FROM thread_slice AS slice
WHERE
slice.name GLOB 'deliverInputEvent*';
-- Collects information about input reader, input dispatcher and
-- DeliverInputEvent steps for the given Android input id.
CREATE PERFETTO TABLE chrome_android_input (
-- Input id.
android_input_id STRING,
-- Input reader step start timestamp.
input_reader_processing_start_ts TIMESTAMP,
-- Input reader step end timestamp.
input_reader_processing_end_ts TIMESTAMP,
-- Input reader step utid.
input_reader_utid LONG,
-- Input dispatcher step start timestamp.
input_dispatcher_processing_start_ts TIMESTAMP,
-- Input dispatcher step end timestamp.
input_dispatcher_processing_end_ts TIMESTAMP,
-- Input dispatcher step utid.
input_dispatcher_utid LONG,
-- DeliverInputEvent step start timestamp.
deliver_input_event_start_ts TIMESTAMP,
-- DeliverInputEvent step end timestamp.
deliver_input_event_end_ts TIMESTAMP,
-- DeliverInputEvent step utid.
deliver_input_event_utid LONG
) AS
SELECT
_chrome_android_motion_input_reader_step.android_input_id,
_chrome_android_motion_input_reader_step.ts AS input_reader_processing_start_ts,
_chrome_android_motion_input_reader_step.ts + _chrome_android_motion_input_reader_step.dur AS input_reader_processing_end_ts,
_chrome_android_motion_input_reader_step.utid AS input_reader_utid,
_chrome_android_motion_input_dispatcher_step.ts AS input_dispatcher_processing_start_ts,
_chrome_android_motion_input_dispatcher_step.ts + _chrome_android_motion_input_dispatcher_step.dur AS input_dispatcher_processing_end_ts,
_chrome_android_motion_input_dispatcher_step.utid AS input_dispatcher_utid,
chrome_deliver_android_input_event.ts AS deliver_input_event_start_ts,
chrome_deliver_android_input_event.ts + chrome_deliver_android_input_event.dur AS deliver_input_event_end_ts,
chrome_deliver_android_input_event.utid AS deliver_input_event_utid
FROM _chrome_android_motion_input_reader_step
LEFT JOIN _chrome_android_motion_input_dispatcher_step
USING (android_input_id)
LEFT JOIN chrome_deliver_android_input_event
USING (android_input_id);
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