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255 lines
7.9 KiB
255 lines
7.9 KiB
#!/usr/bin/env python
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# Copyright (C) 2019 The Android Open Source Project
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import argparse
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import logging
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import os
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import sys
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import subprocess
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import tempfile
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ROOT_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
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ADB_PATH = os.path.join(ROOT_DIR, 'buildtools/android_sdk/platform-tools/adb')
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TEMPLATED_PERFETTO_CFG = '''
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buffers {{
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size_kb: 65536
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fill_policy: RING_BUFFER
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}}
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data_sources {{
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config {{
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name: "linux.ftrace"
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target_buffer: 0
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ftrace_config {{
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ftrace_events: "sched_switch"
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buffer_size_kb: {buffer_size_kb}
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drain_period_ms: {drain_period_ms}
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}}
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}}
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}}
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duration_ms: 15000
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'''
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PERFETTO_PER_CPU_BUFFER_SIZE_KB_PARAMS = [
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128,
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256,
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512,
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1 * 1024, # 1 MB
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2 * 1024, # 2 MB
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4 * 1024, # 4 MB
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]
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PERFETTO_DRAIN_RATE_MS_PARAMS = [
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100,
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240,
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500,
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1 * 1000, # 1s
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2 * 1000, # 2s
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5 * 1000, # 5s
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]
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BUSY_THREADS_NUM_THREADS_PARAMS = [
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8,
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32,
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128,
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]
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BUSY_THREADS_DUTY_CYCLE_PARAMS = [
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10,
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100,
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]
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BUSY_THREADS_PERIOD_US_PARAMS = [
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500,
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1 * 1000, # 1 ms
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10 * 1000, # 10 ms
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]
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TRACE_PROCESSOR_QUERY = """
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SELECT
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a.value as num_sched,
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b.value as num_overrun
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FROM (
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SELECT COUNT(*) as value
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FROM sched
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) as a, (
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SELECT SUM(value) as value
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FROM stats
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WHERE name = 'ftrace_cpu_overrun_end'
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) as b
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"""
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def AdbArgs(*args):
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cmd = [ADB_PATH] + list([str(x) for x in args])
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logging.debug('> adb ' + ' '.join([str(x) for x in args]))
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return cmd
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def AdbCall(*args):
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return subprocess.check_output(AdbArgs(*args)).decode('utf-8').rstrip()
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def SingleTraceRun(out_dir, prio_name, buffer_size_kb, drain_rate_ms,
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num_threads, duty_cycle, period_us):
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busy_threads_args = AdbArgs('shell', '/data/local/tmp/busy_threads',
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'--threads={}'.format(num_threads),
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'--duty_cycle={}'.format(duty_cycle),
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'--period_us={}'.format(period_us))
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perfetto_args = AdbArgs('shell', 'perfetto', '--txt', '-c', '-', '-o', '-')
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# Create a file object to read the trace into.
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with tempfile.NamedTemporaryFile() as trace_file:
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logging.info(
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"Starting trace with parameters ({}, {}, {}, {}, {}, {})".format(
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prio_name, buffer_size_kb, drain_rate_ms, num_threads, duty_cycle,
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period_us))
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# Start the busy threads running.
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busy_threads_handle = subprocess.Popen(busy_threads_args)
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# Start the Perfetto trace.
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perfetto_handle = subprocess.Popen(
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perfetto_args, stdin=subprocess.PIPE, stdout=trace_file)
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# Create the config with the parameters
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config = TEMPLATED_PERFETTO_CFG.format(
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buffer_size_kb=buffer_size_kb, drain_period_ms=drain_rate_ms)
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# Send the config to the Perfetto binary and wait for response.
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perfetto_handle.stdin.write(config.encode())
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perfetto_handle.stdin.close()
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perfetto_ret = perfetto_handle.wait()
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# Stop busy threads from running.
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busy_threads_handle.terminate()
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# Return any errors from Perfetto.
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if perfetto_ret:
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raise subprocess.CalledProcessError(
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cmd=perfetto_args, returncode=perfetto_ret)
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# TODO(lalitm): allow trace processor to take the query file from stdin
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# to prevent this hack from being required.
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with tempfile.NamedTemporaryFile() as trace_query_file:
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trace_query_file.file.write(TRACE_PROCESSOR_QUERY.encode())
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trace_query_file.file.flush()
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# Run the trace processor on the config.
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tp_path = os.path.join(out_dir, 'trace_processor_shell')
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tp_out = subprocess.check_output(
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[tp_path, '-q', trace_query_file.name, trace_file.name])
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# Get the CSV output from trace processor (stripping the header).
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[num_sched, num_overrun] = str(tp_out).split('\n')[1].split(',')
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# Print the row to stdout.
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sys.stdout.write('"{}",{},{},{},{},{},{},{}\n'.format(
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prio_name, buffer_size_kb, drain_rate_ms, num_threads, duty_cycle,
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period_us, num_sched, num_overrun))
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def SinglePriorityRun(out_dir, prio_name):
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for buffer_size_kb in PERFETTO_PER_CPU_BUFFER_SIZE_KB_PARAMS:
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for drain_rate_ms in PERFETTO_DRAIN_RATE_MS_PARAMS:
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for num_threads in BUSY_THREADS_NUM_THREADS_PARAMS:
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for duty_cycle in BUSY_THREADS_DUTY_CYCLE_PARAMS:
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for period_us in BUSY_THREADS_PERIOD_US_PARAMS:
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SingleTraceRun(out_dir, prio_name, buffer_size_kb, drain_rate_ms,
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num_threads, duty_cycle, period_us)
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def CycleTracedAndProbes():
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AdbCall('shell', 'stop', 'traced')
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AdbCall('shell', 'stop', 'traced_probes')
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AdbCall('shell', 'start', 'traced')
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AdbCall('shell', 'start', 'traced_probes')
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AdbCall('shell', 'sleep', '5')
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traced_pid = AdbCall('shell', 'pidof', 'traced')
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probes_pid = AdbCall('shell', 'pidof', 'traced_probes')
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assert (traced_pid is not None and probes_pid is not None)
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return (traced_pid, probes_pid)
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def Main():
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parser = argparse.ArgumentParser()
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parser.add_argument('linux_out_dir', help='out/android/')
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parser.add_argument('android_out_dir', help='out/android/')
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args = parser.parse_args()
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# Root ourselves on the device.
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logging.info('Waiting for device and rooting ...')
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AdbCall('wait-for-device')
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AdbCall('root')
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AdbCall('wait-for-device')
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# Push busy threads to device
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busy_threads_path = os.path.join(args.android_out_dir, 'busy_threads')
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AdbCall('shell', 'rm', '-rf', '/data/local/tmp/perfetto_load_test')
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AdbCall('shell', 'mkdir', '/data/local/tmp/perfetto_load_test')
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AdbCall('push', busy_threads_path, '/data/local/tmp/perfetto_load_test/')
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# Stop and start traced and traced_probes
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(traced_pid, probes_pid) = CycleTracedAndProbes()
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# Print the header for csv.
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sys.stdout.write('"{}","{}","{}","{}","{}","{}","{}","{}"\n'.format(
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'prio_name', 'buffer_size_kb', 'drain_rate_ms', 'num_threads',
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'duty_cycle', 'period_us', 'num_sched', 'num_overrun'))
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# First, do a single run in all configurations without changing prio.
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SinglePriorityRun(args.linux_out_dir, 'Default')
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# Stop and start traced and traced_probes
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(traced_pid, probes_pid) = CycleTracedAndProbes()
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# Setup the nice values and check them.
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AdbCall('shell', 'renice', '-n', '-19', '-p', traced_pid)
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AdbCall('shell', 'renice', '-n', '-19', '-p', probes_pid)
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logging.debug(AdbCall('shell', 'cat', '/proc/{}/stat'.format(traced_pid)))
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logging.debug(AdbCall('shell', 'cat', '/proc/{}/stat'.format(probes_pid)))
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# Do the run.
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SinglePriorityRun(args.linux_out_dir, '-19 Nice')
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# Stop and start traced and traced_probes
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(traced_pid, probes_pid) = CycleTracedAndProbes()
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# Then do a run with FIFO scheduling for traced and traced_probes.
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AdbCall('shell', 'chrt', '-f', '-p', traced_pid, '99')
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AdbCall('shell', 'chrt', '-f', '-p', probes_pid, '99')
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logging.debug(AdbCall('shell', 'chrt', '-p', traced_pid))
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logging.debug(AdbCall('shell', 'chrt', '-p', probes_pid))
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# Do the run.
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SinglePriorityRun(args.linux_out_dir, 'FIFO')
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# Stop and start traced and traced_probes
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(traced_pid, probes_pid) = CycleTracedAndProbes()
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# Cleanup any pushed files, priorities etc.
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logging.info("Cleaning up test")
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AdbCall('shell', 'rm', '-rf', '/data/local/tmp/perfetto_load_test')
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logging.debug(AdbCall('shell', 'cat', '/proc/{}/stat'.format(traced_pid)))
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logging.debug(AdbCall('shell', 'cat', '/proc/{}/stat'.format(probes_pid)))
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AdbCall('unroot')
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return 0
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if __name__ == '__main__':
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logging.basicConfig(level=logging.INFO)
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sys.exit(Main())
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