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android13/external/perfetto/tools/cpu_profile

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#!/usr/bin/env python3
# Copyright (C) 2022 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.
"""Runs tracing with CPU profiling enabled, and symbolizes traces if requested.
For usage instructions, please see:
https://perfetto.dev/docs/quickstart/callstack-sampling
Adapted in large part from `heap_profile`.
"""
import argparse
import os
import shutil
import signal
import subprocess
import sys
import tempfile
import time
import uuid
# Used for creating directories, etc.
UUID = str(uuid.uuid4())[-6:]
# See `sigint_handler` below.
IS_INTERRUPTED = False
def sigint_handler(signal, frame):
"""Useful for cleanly interrupting tracing."""
global IS_INTERRUPTED
IS_INTERRUPTED = True
def exit_with_no_profile():
sys.exit("No profiles generated.")
def exit_with_bug_report(error):
sys.exit(
"{}\n\n If this is unexpected, please consider filing a bug at: \n"
"https://perfetto.dev/docs/contributing/getting-started#bugs.".format(
error))
def adb_check_output(command):
"""Runs an `adb` command and returns its output."""
try:
return subprocess.check_output(command).decode('utf-8')
except FileNotFoundError:
sys.exit("`adb` not found: Is it installed or on PATH?")
except subprocess.CalledProcessError as error:
sys.exit("`adb` error: Are any (or multiple) devices connected?\n"
"If multiple devices are connected, please select one by "
"setting `ANDROID_SERIAL=device_id`.\n"
"{}".format(error))
except Exception as error:
exit_with_bug_report(error)
def parse_and_validate_args():
"""Parses, validates, and returns command-line arguments for this script."""
DESCRIPTION = """Runs tracing with CPU profiling enabled, and symbolizes
traces if requested.
For usage instructions, please see:
https://perfetto.dev/docs/quickstart/cpu-profiling
"""
parser = argparse.ArgumentParser(description=DESCRIPTION)
parser.add_argument(
"-f",
"--frequency",
help="Sampling frequency (Hz). "
"Default: 100 Hz.",
metavar="FREQUENCY",
type=int,
default=100)
parser.add_argument(
"-d",
"--duration",
help="Duration of profile (ms). 0 to run until interrupted. "
"Default: until interrupted by user.",
metavar="DURATION",
type=int,
default=0)
parser.add_argument(
"-n",
"--name",
help="Comma-separated list of names of processes to be profiled.",
metavar="NAMES",
default=None)
parser.add_argument(
"-p",
"--partial-matching",
help="If set, enables \"partial matching\" on the strings in --names/-n."
"Processes that are already running when profiling is started, and whose "
"names include any of the values in --names/-n as substrings will be profiled.",
action="store_true")
parser.add_argument(
"-c",
"--config",
help="A custom configuration file, if any, to be used for profiling. "
"If provided, --frequency/-f, --duration/-d, and --name/-n are not used.",
metavar="CONFIG",
default=None)
parser.add_argument(
"-o",
"--output",
help="Output directory for recorded trace.",
metavar="DIRECTORY",
default=None)
args = parser.parse_args()
if args.config is not None and args.name is not None:
sys.exit("--name/-n should not be provided when --config/-c is provided.")
elif args.config is None and args.name is None:
sys.exit("One of --names/-n or --config/-c is required.")
return args
def get_matching_processes(args, names_to_match):
"""Returns a list of currently-running processes whose names match `names_to_match`.
Args:
args: The command-line arguments provided to this script.
names_to_match: The list of process names provided by the user.
"""
# Returns names as they are.
if not args.partial_matching:
return names_to_match
# Attempt to match names to names of currently running processes.
PS_PROCESS_OFFSET = 8
matching_processes = []
for line in adb_check_output(['adb', 'shell', 'ps', '-A']).splitlines():
line_split = line.split()
if len(line_split) <= PS_PROCESS_OFFSET:
continue
process = line_split[PS_PROCESS_OFFSET]
for name in names_to_match:
if name in process:
matching_processes.append(process)
break
return matching_processes
def get_perfetto_config(args):
"""Returns a Perfetto config with CPU profiling enabled for the selected processes.
Args:
args: The command-line arguments provided to this script.
"""
if args.config is not None:
try:
with open(args.config, 'r') as config_file:
return config_file.read()
except IOError as error:
sys.exit("Unable to read config file: {}".format(error))
CONFIG_INDENT = ' '
CONFIG = '''buffers {{
size_kb: 2048
}}
buffers {{
size_kb: 63488
}}
data_sources {{
config {{
name: "linux.process_stats"
target_buffer: 0
process_stats_config {{
proc_stats_poll_ms: 100
}}
}}
}}
data_sources {{
config {{
name: "linux.perf"
target_buffer: 1
perf_event_config {{
all_cpus: true
sampling_frequency: {frequency}
{target_config}
}}
}}
}}
duration_ms: {duration}
write_into_file: true
flush_timeout_ms: 30000
flush_period_ms: 604800000
'''
target_config = ""
matching_processes = []
if args.name is not None:
names_to_match = [name.strip() for name in args.name.split(',')]
matching_processes = get_matching_processes(args, names_to_match)
if not matching_processes:
sys.exit("No running processes matched for profiling.")
for process in matching_processes:
target_config += CONFIG_INDENT + 'target_cmdline: "{}"\n'.format(process)
print("Configured profiling for these processes:\n")
for matching_process in matching_processes:
print(matching_process)
print()
config = CONFIG.format(
frequency=args.frequency,
duration=args.duration,
target_config=target_config)
return config
def release_or_newer(release):
"""Returns whether a new enough Android release is being used."""
SDK = {'R': 30}
sdk = int(
adb_check_output(
['adb', 'shell', 'getprop', 'ro.system.build.version.sdk']).strip())
if sdk >= SDK[release]:
return True
codename = adb_check_output(
['adb', 'shell', 'getprop', 'ro.build.version.codename']).strip()
return codename == release
def get_and_prepare_profile_target(args):
"""Returns the target where the trace/profile will be output. Creates a new directory if necessary.
Args:
args: The command-line arguments provided to this script.
"""
profile_target = os.path.join(tempfile.gettempdir(), UUID)
if args.output is not None:
profile_target = args.output
else:
os.makedirs(profile_target, exist_ok=True)
if not os.path.isdir(profile_target):
sys.exit("Output directory {} not found.".format(profile_target))
if os.listdir(profile_target):
sys.exit("Output directory {} not empty.".format(profile_target))
return profile_target
def record_trace(config, profile_target):
"""Runs Perfetto with the provided configuration to record a trace.
Args:
config: The Perfetto config to be used for tracing/profiling.
profile_target: The directory where the recorded trace is output.
"""
NULL = open(os.devnull)
NO_OUT = {
'stdout': NULL,
'stderr': NULL,
}
if not release_or_newer('R'):
sys.exit("This tool requires Android R+ to run.")
profile_device_path = '/data/misc/perfetto-traces/profile-' + UUID
perfetto_command = ('CONFIG=\'{}\'; echo ${{CONFIG}} | '
'perfetto --txt -c - -o {} -d')
try:
perfetto_pid = int(
adb_check_output([
'adb', 'exec-out',
perfetto_command.format(config, profile_device_path)
]).strip())
except ValueError as error:
sys.exit("Unable to start profiling: {}".format(error))
print("Profiling active. Press Ctrl+C to terminate.")
old_handler = signal.signal(signal.SIGINT, sigint_handler)
perfetto_alive = True
while perfetto_alive and not IS_INTERRUPTED:
perfetto_alive = subprocess.call(
['adb', 'shell', '[ -d /proc/{} ]'.format(perfetto_pid)], **NO_OUT) == 0
time.sleep(0.25)
print("Finishing profiling and symbolization...")
if IS_INTERRUPTED:
adb_check_output(['adb', 'shell', 'kill', '-INT', str(perfetto_pid)])
# Restore old handler.
signal.signal(signal.SIGINT, old_handler)
while perfetto_alive:
perfetto_alive = subprocess.call(
['adb', 'shell', '[ -d /proc/{} ]'.format(perfetto_pid)]) == 0
time.sleep(0.25)
profile_host_path = os.path.join(profile_target, 'raw-trace')
adb_check_output(['adb', 'pull', profile_device_path, profile_host_path])
adb_check_output(['adb', 'shell', 'rm', profile_device_path])
def get_trace_to_text():
"""Sets up and returns the path to `trace_to_text`."""
try:
trace_to_text = get_perfetto_prebuilt('trace_to_text', soft_fail=True)
except Exception as error:
exit_with_bug_report(error)
if trace_to_text is None:
exit_with_bug_report(
"Unable to download `trace_to_text` for symbolizing profiles.")
return trace_to_text
def concatenate_files(files_to_concatenate, output_file):
"""Concatenates files.
Args:
files_to_concatenate: Paths for input files to concatenate.
output_file: Path to the resultant output file.
"""
with open(output_file, 'wb') as output:
for file in files_to_concatenate:
with open(file, 'rb') as input:
shutil.copyfileobj(input, output)
def symbolize_trace(trace_to_text, profile_target):
"""Attempts symbolization of the recorded trace/profile, if symbols are available.
Args:
trace_to_text: The path to the `trace_to_text` binary used for symbolization.
profile_target: The directory where the recorded trace was output.
Returns:
The path to the symbolized trace file if symbolization was completed,
and the original trace file, if it was not.
"""
binary_path = os.getenv('PERFETTO_BINARY_PATH')
trace_file = os.path.join(profile_target, 'raw-trace')
files_to_concatenate = [trace_file]
if binary_path is not None:
try:
with open(os.path.join(profile_target, 'symbols'), 'w') as symbols_file:
return_code = subprocess.call([trace_to_text, 'symbolize', trace_file],
env=dict(
os.environ,
PERFETTO_BINARY_PATH=binary_path),
stdout=symbols_file)
except IOError as error:
sys.exit("Unable to write symbols to disk: {}".format(error))
if return_code == 0:
files_to_concatenate.append(os.path.join(profile_target, 'symbols'))
else:
print("Failed to symbolize. Continuing without symbols.", file=sys.stderr)
if len(files_to_concatenate) > 1:
trace_file = os.path.join(profile_target, 'symbolized-trace')
try:
concatenate_files(files_to_concatenate, trace_file)
except Exception as error:
sys.exit("Unable to write symbolized profile to disk: {}".format(error))
return trace_file
def generate_pprof_profiles(trace_to_text, trace_file):
"""Generates pprof profiles from the recorded trace.
Args:
trace_to_text: The path to the `trace_to_text` binary used for generating profiles.
trace_file: The oath to the recorded and potentially symbolized trace file.
Returns:
The directory where pprof profiles are output.
"""
try:
trace_to_text_output = subprocess.check_output(
[trace_to_text, 'profile', '--perf', trace_file])
except Exception as error:
exit_with_bug_report(
"Unable to extract profiles from trace: {}".format(error))
profiles_output_directory = None
for word in trace_to_text_output.decode('utf-8').split():
if 'perf_profile-' in word:
profiles_output_directory = word
if profiles_output_directory is None:
exit_with_no_profile()
return profiles_output_directory
def copy_profiles_to_destination(profile_target, profile_path):
"""Copies recorded profiles to `profile_target` from `profile_path`."""
profile_files = os.listdir(profile_path)
if not profile_files:
exit_with_no_profile()
try:
for profile_file in profile_files:
shutil.copy(os.path.join(profile_path, profile_file), profile_target)
except Exception as error:
sys.exit("Unable to copy profiles to {}: {}".format(profile_target, error))
print("Wrote profiles to {}".format(profile_target))
def main(argv):
args = parse_and_validate_args()
profile_target = get_and_prepare_profile_target(args)
record_trace(get_perfetto_config(args), profile_target)
trace_to_text = get_trace_to_text()
trace_file = symbolize_trace(trace_to_text, profile_target)
copy_profiles_to_destination(
profile_target, generate_pprof_profiles(trace_to_text, trace_file))
return 0
# BEGIN_SECTION_GENERATED_BY(roll-prebuilts)
# Revision: v25.0
PERFETTO_PREBUILT_MANIFEST = [{
'tool':
'trace_to_text',
'arch':
'mac-amd64',
'file_name':
'trace_to_text',
'file_size':
6525752,
'url':
'https://commondatastorage.googleapis.com/perfetto-luci-artifacts/v25.0/mac-amd64/trace_to_text',
'sha256':
'64ccf6bac87825145691c6533412e514891f82300d68ff7ce69e8d2ca69aaf62',
'platform':
'darwin',
'machine': ['x86_64']
}, {
'tool':
'trace_to_text',
'arch':
'windows-amd64',
'file_name':
'trace_to_text.exe',
'file_size':
5925888,
'url':
'https://commondatastorage.googleapis.com/perfetto-luci-artifacts/v25.0/windows-amd64/trace_to_text.exe',
'sha256':
'29e50ec4d8e28c7c322ba13273afcce80c63fe7d9f182b83af0e2077b4d2b952',
'platform':
'win32',
'machine': ['amd64']
}, {
'tool':
'trace_to_text',
'arch':
'linux-amd64',
'file_name':
'trace_to_text',
'file_size':
6939560,
'url':
'https://commondatastorage.googleapis.com/perfetto-luci-artifacts/v25.0/linux-amd64/trace_to_text',
'sha256':
'109f4ff3bbd47633b0c08a338f1230e69d529ddf1584656ed45d8a59acaaabeb',
'platform':
'linux',
'machine': ['x86_64']
}]
# DO NOT EDIT. If you wish to make edits to this code, you need to change only
# //tools/get_perfetto_prebuilt.py and run /tools/roll-prebuilts to regenerate
# all the others scripts this is embedded into.
def get_perfetto_prebuilt(tool_name, soft_fail=False, arch=None):
""" Downloads the prebuilt, if necessary, and returns its path on disk. """
# The first time this is invoked, it downloads the |url| and caches it into
# ~/.perfetto/prebuilts/$tool_name. On subsequent invocations it just runs the
# cached version.
def download_or_get_cached(file_name, url, sha256):
import os, hashlib, subprocess
dir = os.path.join(
os.path.expanduser('~'), '.local', 'share', 'perfetto', 'prebuilts')
os.makedirs(dir, exist_ok=True)
bin_path = os.path.join(dir, file_name)
sha256_path = os.path.join(dir, file_name + '.sha256')
needs_download = True
# Avoid recomputing the SHA-256 on each invocation. The SHA-256 of the last
# download is cached into file_name.sha256, just check if that matches.
if os.path.exists(bin_path) and os.path.exists(sha256_path):
with open(sha256_path, 'rb') as f:
digest = f.read().decode()
if digest == sha256:
needs_download = False
if needs_download:
# Either the filed doesn't exist or the SHA256 doesn't match.
tmp_path = bin_path + '.tmp'
print('Downloading ' + url)
subprocess.check_call(['curl', '-f', '-L', '-#', '-o', tmp_path, url])
with open(tmp_path, 'rb') as fd:
actual_sha256 = hashlib.sha256(fd.read()).hexdigest()
if actual_sha256 != sha256:
raise Exception('Checksum mismatch for %s (actual: %s, expected: %s)' %
(url, actual_sha256, sha256))
os.chmod(tmp_path, 0o755)
os.rename(tmp_path, bin_path)
with open(sha256_path, 'w') as f:
f.write(sha256)
return bin_path
# --- end of download_or_get_cached() ---
# --- get_perfetto_prebuilt() function starts here. ---
import os, platform, sys
plat = sys.platform.lower()
machine = platform.machine().lower()
manifest_entry = None
for entry in PERFETTO_PREBUILT_MANIFEST:
# If the caller overrides the arch, just match that (for Android prebuilts).
if arch and entry.get('arch') == arch:
manifest_entry = entry
break
# Otherwise guess the local machine arch.
if entry.get('tool') == tool_name and entry.get(
'platform') == plat and machine in entry.get('machine', []):
manifest_entry = entry
break
if manifest_entry is None:
if soft_fail:
return None
raise Exception(
('No prebuilts available for %s-%s\n' % (plat, machine)) +
'See https://perfetto.dev/docs/contributing/build-instructions')
return download_or_get_cached(
file_name=manifest_entry['file_name'],
url=manifest_entry['url'],
sha256=manifest_entry['sha256'])
# END_SECTION_GENERATED_BY(roll-prebuilts)
if __name__ == '__main__':
sys.exit(main(sys.argv))
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