-- 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 deprecated.v42.common.slices;
-- Finds the end timestamp for a given slice's descendant with a given name.
-- If there are multiple descendants with a given name, the function will return
-- the first one, so it's most useful when working with a timeline broken down
-- into phases, where each subphase can happen only once.
CREATE PERFETTO FUNCTION _descendant_slice_end(
-- Id of the parent slice.
parent_id INT,
-- Name of the child with the desired end TS.
child_name STRING
)
-- End timestamp of the child or NULL if it doesn't exist.
RETURNS INT AS
SELECT
CASE WHEN s.dur
IS NOT -1 THEN s.ts + s.dur
ELSE NULL
END
FROM descendant_slice($parent_id) s
WHERE s.name GLOB $child_name
LIMIT 1;
-- Returns the presentation timestamp for a given EventLatency slice.
-- This is either the end of
-- SwapEndToPresentationCompositorFrame (if it exists),
-- the end of LatchToPresentation (if it exists),
-- the end of SwapStartToPresentation (if it exists),
-- or the end of LatchToSwapEnd (workaround in older Chrome versions).
CREATE PERFETTO FUNCTION _get_presentation_timestamp(
-- The slice id which we need the presentation timestamp for.
id LONG
)
RETURNS INT AS
SELECT
COALESCE(_descendant_slice_end(id, 'SwapEndToPresentationCompositorFrame'),
_descendant_slice_end(id, '*ToPresentation'),
_descendant_slice_end(id, 'LatchToSwapEnd'))
FROM slice WHERE $id = id;
-- All EventLatency slices.
CREATE PERFETTO TABLE chrome_event_latencies(
-- Slice Id for the EventLatency scroll event.
id INT,
-- Slice name.
name STRING,
-- The start timestamp of the scroll.
ts INT,
-- The duration of the scroll.
dur INT,
-- The id of the scroll update event.
scroll_update_id INT,
-- Whether this input event was presented.
is_presented BOOL,
-- EventLatency event type.
event_type STRING,
-- Perfetto track this slice is found on.
track_id INT
) AS
SELECT
slice.id,
slice.name,
slice.ts,
slice.dur,
EXTRACT_arg(arg_set_id, 'event_latency.event_latency_id') AS scroll_update_id,
has_descendant_slice_with_name(
slice.id,
'SubmitCompositorFrameToPresentationCompositorFrame')
AS is_presented,
EXTRACT_ARG(arg_set_id, 'event_latency.event_type') AS event_type,
slice.track_id
FROM slice
WHERE name = 'EventLatency';
-- All EventLatency slices that are relevant to scrolling, including presented
-- pinches. Materialized to reduce how many times we query slice.
CREATE PERFETTO TABLE _gesture_scroll_events_no_scroll_id
AS
SELECT
name,
ts,
dur,
id,
scroll_update_id,
is_presented,
_get_presentation_timestamp(chrome_event_latencies.id)
AS presentation_timestamp,
event_type,
track_id
FROM chrome_event_latencies
WHERE (
event_type GLOB '*GESTURE_SCROLL*'
-- Pinches are only relevant if the frame was presented.
OR (event_type GLOB '*GESTURE_PINCH_UPDATE'
AND has_descendant_slice_with_name(
id,
'SubmitCompositorFrameToPresentationCompositorFrame')
)
);
-- Extracts scroll id for the EventLatency slice at `ts`.
CREATE PERFETTO FUNCTION chrome_get_most_recent_scroll_begin_id(
-- Timestamp of the EventLatency slice to get the scroll id for.
ts INT)
-- The event_latency_id of the EventLatency slice with the type
-- GESTURE_SCROLL_BEGIN that is the closest to `ts`.
RETURNS INT AS
SELECT scroll_update_id
FROM _gesture_scroll_events_no_scroll_id
WHERE event_type = 'GESTURE_SCROLL_BEGIN'
AND ts<=$ts
ORDER BY ts DESC
LIMIT 1;
-- All scroll-related events (frames) including gesture scroll updates, begins
-- and ends with respective scroll ids and start/end timestamps, regardless of
-- being presented. This includes pinches that were presented. See b/315761896
-- for context on pinches.
CREATE PERFETTO TABLE chrome_gesture_scroll_events(
-- Slice Id for the EventLatency scroll event.
id INT,
-- Slice name.
name STRING,
-- The start timestamp of the scroll.
ts INT,
-- The duration of the scroll.
dur INT,
-- The id of the scroll update event.
scroll_update_id INT,
-- The id of the scroll.
scroll_id INT,
-- Whether this input event was presented.
is_presented BOOL,
-- Frame presentation timestamp aka the timestamp of the
-- SwapEndToPresentationCompositorFrame substage.
-- TODO(b/341047059): temporarily use LatchToSwapEnd as a workaround if
-- SwapEndToPresentationCompositorFrame is missing due to b/247542163.
presentation_timestamp INT,
-- EventLatency event type.
event_type STRING,
-- Perfetto track this slice is found on.
track_id INT
) AS
SELECT
id,
name,
ts,
dur,
scroll_update_id,
chrome_get_most_recent_scroll_begin_id(ts) AS scroll_id,
is_presented,
presentation_timestamp,
event_type,
track_id
FROM _gesture_scroll_events_no_scroll_id;
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