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#!/usr/bin/env python
# Copyright (C) 2019 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.
import argparse
import logging
import os
import sys
import subprocess
import tempfile
ROOT_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
ADB_PATH = os.path.join(ROOT_DIR, 'buildtools/android_sdk/platform-tools/adb')
TEMPLATED_PERFETTO_CFG = '''
buffers {{
size_kb: 65536
fill_policy: RING_BUFFER
}}
data_sources {{
config {{
name: "linux.ftrace"
target_buffer: 0
ftrace_config {{
ftrace_events: "sched_switch"
buffer_size_kb: {buffer_size_kb}
drain_period_ms: {drain_period_ms}
}}
}}
}}
duration_ms: 15000
'''
PERFETTO_PER_CPU_BUFFER_SIZE_KB_PARAMS = [
128,
256,
512,
1 * 1024, # 1 MB
2 * 1024, # 2 MB
4 * 1024, # 4 MB
]
PERFETTO_DRAIN_RATE_MS_PARAMS = [
100,
240,
500,
1 * 1000, # 1s
2 * 1000, # 2s
5 * 1000, # 5s
]
BUSY_THREADS_NUM_THREADS_PARAMS = [
8,
32,
128,
]
BUSY_THREADS_DUTY_CYCLE_PARAMS = [
10,
100,
]
BUSY_THREADS_PERIOD_US_PARAMS = [
500,
1 * 1000, # 1 ms
10 * 1000, # 10 ms
]
TRACE_PROCESSOR_QUERY = """
SELECT
a.value as num_sched,
b.value as num_overrun
FROM (
SELECT COUNT(*) as value
FROM sched
) as a, (
SELECT SUM(value) as value
FROM stats
WHERE name = 'ftrace_cpu_overrun_end'
) as b
"""
def AdbArgs(*args):
cmd = [ADB_PATH] + list([str(x) for x in args])
logging.debug('> adb ' + ' '.join([str(x) for x in args]))
return cmd
def AdbCall(*args):
return subprocess.check_output(AdbArgs(*args)).decode('utf-8').rstrip()
def SingleTraceRun(out_dir, prio_name, buffer_size_kb, drain_rate_ms,
num_threads, duty_cycle, period_us):
busy_threads_args = AdbArgs('shell', '/data/local/tmp/busy_threads',
'--threads={}'.format(num_threads),
'--duty_cycle={}'.format(duty_cycle),
'--period_us={}'.format(period_us))
perfetto_args = AdbArgs('shell', 'perfetto', '--txt', '-c', '-', '-o', '-')
# Create a file object to read the trace into.
with tempfile.NamedTemporaryFile() as trace_file:
logging.info(
"Starting trace with parameters ({}, {}, {}, {}, {}, {})".format(
prio_name, buffer_size_kb, drain_rate_ms, num_threads, duty_cycle,
period_us))
# Start the busy threads running.
busy_threads_handle = subprocess.Popen(busy_threads_args)
# Start the Perfetto trace.
perfetto_handle = subprocess.Popen(
perfetto_args, stdin=subprocess.PIPE, stdout=trace_file)
# Create the config with the parameters
config = TEMPLATED_PERFETTO_CFG.format(
buffer_size_kb=buffer_size_kb, drain_period_ms=drain_rate_ms)
# Send the config to the Perfetto binary and wait for response.
perfetto_handle.stdin.write(config.encode())
perfetto_handle.stdin.close()
perfetto_ret = perfetto_handle.wait()
# Stop busy threads from running.
busy_threads_handle.terminate()
# Return any errors from Perfetto.
if perfetto_ret:
raise subprocess.CalledProcessError(
cmd=perfetto_args, returncode=perfetto_ret)
# TODO(lalitm): allow trace processor to take the query file from stdin
# to prevent this hack from being required.
with tempfile.NamedTemporaryFile() as trace_query_file:
trace_query_file.file.write(TRACE_PROCESSOR_QUERY.encode())
trace_query_file.file.flush()
# Run the trace processor on the config.
tp_path = os.path.join(out_dir, 'trace_processor_shell')
tp_out = subprocess.check_output(
[tp_path, '-q', trace_query_file.name, trace_file.name])
# Get the CSV output from trace processor (stripping the header).
[num_sched, num_overrun] = str(tp_out).split('\n')[1].split(',')
# Print the row to stdout.
sys.stdout.write('"{}",{},{},{},{},{},{},{}\n'.format(
prio_name, buffer_size_kb, drain_rate_ms, num_threads, duty_cycle,
period_us, num_sched, num_overrun))
def SinglePriorityRun(out_dir, prio_name):
for buffer_size_kb in PERFETTO_PER_CPU_BUFFER_SIZE_KB_PARAMS:
for drain_rate_ms in PERFETTO_DRAIN_RATE_MS_PARAMS:
for num_threads in BUSY_THREADS_NUM_THREADS_PARAMS:
for duty_cycle in BUSY_THREADS_DUTY_CYCLE_PARAMS:
for period_us in BUSY_THREADS_PERIOD_US_PARAMS:
SingleTraceRun(out_dir, prio_name, buffer_size_kb, drain_rate_ms,
num_threads, duty_cycle, period_us)
def CycleTracedAndProbes():
AdbCall('shell', 'stop', 'traced')
AdbCall('shell', 'stop', 'traced_probes')
AdbCall('shell', 'start', 'traced')
AdbCall('shell', 'start', 'traced_probes')
AdbCall('shell', 'sleep', '5')
traced_pid = AdbCall('shell', 'pidof', 'traced')
probes_pid = AdbCall('shell', 'pidof', 'traced_probes')
assert (traced_pid is not None and probes_pid is not None)
return (traced_pid, probes_pid)
def Main():
parser = argparse.ArgumentParser()
parser.add_argument('linux_out_dir', help='out/android/')
parser.add_argument('android_out_dir', help='out/android/')
args = parser.parse_args()
# Root ourselves on the device.
logging.info('Waiting for device and rooting ...')
AdbCall('wait-for-device')
AdbCall('root')
AdbCall('wait-for-device')
# Push busy threads to device
busy_threads_path = os.path.join(args.android_out_dir, 'busy_threads')
AdbCall('shell', 'rm', '-rf', '/data/local/tmp/perfetto_load_test')
AdbCall('shell', 'mkdir', '/data/local/tmp/perfetto_load_test')
AdbCall('push', busy_threads_path, '/data/local/tmp/perfetto_load_test/')
# Stop and start traced and traced_probes
(traced_pid, probes_pid) = CycleTracedAndProbes()
# Print the header for csv.
sys.stdout.write('"{}","{}","{}","{}","{}","{}","{}","{}"\n'.format(
'prio_name', 'buffer_size_kb', 'drain_rate_ms', 'num_threads',
'duty_cycle', 'period_us', 'num_sched', 'num_overrun'))
# First, do a single run in all configurations without changing prio.
SinglePriorityRun(args.linux_out_dir, 'Default')
# Stop and start traced and traced_probes
(traced_pid, probes_pid) = CycleTracedAndProbes()
# Setup the nice values and check them.
AdbCall('shell', 'renice', '-n', '-19', '-p', traced_pid)
AdbCall('shell', 'renice', '-n', '-19', '-p', probes_pid)
logging.debug(AdbCall('shell', 'cat', '/proc/{}/stat'.format(traced_pid)))
logging.debug(AdbCall('shell', 'cat', '/proc/{}/stat'.format(probes_pid)))
# Do the run.
SinglePriorityRun(args.linux_out_dir, '-19 Nice')
# Stop and start traced and traced_probes
(traced_pid, probes_pid) = CycleTracedAndProbes()
# Then do a run with FIFO scheduling for traced and traced_probes.
AdbCall('shell', 'chrt', '-f', '-p', traced_pid, '99')
AdbCall('shell', 'chrt', '-f', '-p', probes_pid, '99')
logging.debug(AdbCall('shell', 'chrt', '-p', traced_pid))
logging.debug(AdbCall('shell', 'chrt', '-p', probes_pid))
# Do the run.
SinglePriorityRun(args.linux_out_dir, 'FIFO')
# Stop and start traced and traced_probes
(traced_pid, probes_pid) = CycleTracedAndProbes()
# Cleanup any pushed files, priorities etc.
logging.info("Cleaning up test")
AdbCall('shell', 'rm', '-rf', '/data/local/tmp/perfetto_load_test')
logging.debug(AdbCall('shell', 'cat', '/proc/{}/stat'.format(traced_pid)))
logging.debug(AdbCall('shell', 'cat', '/proc/{}/stat'.format(probes_pid)))
AdbCall('unroot')
return 0
if __name__ == '__main__':
logging.basicConfig(level=logging.INFO)
sys.exit(Main())