base/tracing/test/trace_processor/diff_tests/chrome/modified_rail_modes.py

#!/usr/bin/env python3
# Copyright 2023 The Chromium Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

from os import sys

import synth_common
from synth_common import s_to_ns

trace = synth_common.create_trace()

trace.add_chrome_metadata(os_name="Android")

track1 = 1234
track2 = 4567
gpu_track = 7890

trace.add_process_track_descriptor(track1, pid=0)
trace.add_process_track_descriptor(track2, pid=2)
trace.add_process_track_descriptor(gpu_track, pid=4)

frame_period = s_to_ns(1.0 / 60)

trace.add_track_event_slice("VSync", ts=s_to_ns(3), dur=10, track=gpu_track)
trace.add_track_event_slice(
    "VSync", ts=s_to_ns(3) + frame_period, dur=10, track=gpu_track)
# Frame skipped, but modified rail mode won't go back to foreground_idle
trace.add_track_event_slice(
    "VSync", ts=s_to_ns(3) + frame_period * 3, dur=10, track=gpu_track)
# Larger gap now when mode will go to foreground_idle
trace.add_track_event_slice(
    "VSync", ts=s_to_ns(3) + frame_period * 12, dur=10, track=gpu_track)
trace.add_track_event_slice(
    "VSync", ts=s_to_ns(3) + frame_period * 13, dur=10, track=gpu_track)
trace.add_track_event_slice(
    "VSync", ts=s_to_ns(3) + frame_period * 14, dur=10, track=gpu_track)

trace.add_rail_mode_slice(
    ts=0,
    dur=s_to_ns(1),
    track=track1,
    mode=trace.prototypes.ChromeRAILMode.RAIL_MODE_RESPONSE)
trace.add_rail_mode_slice(
    ts=s_to_ns(1),
    dur=s_to_ns(2),
    track=track1,
    mode=trace.prototypes.ChromeRAILMode.RAIL_MODE_LOAD)
trace.add_rail_mode_slice(
    ts=s_to_ns(3),
    dur=-1,
    track=track1,
    mode=trace.prototypes.ChromeRAILMode.RAIL_MODE_IDLE)

trace.add_rail_mode_slice(
    ts=0,
    dur=s_to_ns(1),
    track=track2,
    mode=trace.prototypes.ChromeRAILMode.RAIL_MODE_ANIMATION)
trace.add_rail_mode_slice(
    ts=s_to_ns(1),
    dur=s_to_ns(2.5),
    track=track2,
    mode=trace.prototypes.ChromeRAILMode.RAIL_MODE_IDLE)
trace.add_rail_mode_slice(
    ts=s_to_ns(2.5),
    dur=s_to_ns(1),
    track=track2,
    mode=trace.prototypes.ChromeRAILMode.RAIL_MODE_ANIMATION)
trace.add_rail_mode_slice(
    ts=s_to_ns(3.5),
    dur=s_to_ns(1),
    track=track2,
    mode=trace.prototypes.ChromeRAILMode.RAIL_MODE_IDLE)

sys.stdout.buffer.write(trace.trace.SerializeToString())