mirror of
https://github.com/ARM-software/workload-automation.git
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a4c7340746
Previously due to WA automagic the initialization method would only be called once globally, meaning that it was called for cpufreq extraction but not for sysfiles. This commit splits SysfsExtractor into a base FsExtractor and a SysfsExtractor subclass and the initialization methods are explicitly called by both children.
376 lines
16 KiB
Python
376 lines
16 KiB
Python
# Copyright 2013-2015 ARM Limited
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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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#
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# pylint: disable=W0613,no-member,attribute-defined-outside-init
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"""
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Some "standard" instruments to collect additional info about workload execution.
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.. note:: The run() method of a Workload may perform some "boilerplate" as well as
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the actual execution of the workload (e.g. it may contain UI automation
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needed to start the workload). This "boilerplate" execution will also
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be measured by these instruments. As such, they are not suitable for collected
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precise data about specific operations.
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"""
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import os
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import re
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import logging
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import time
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import tarfile
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from itertools import izip, izip_longest
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from subprocess import CalledProcessError
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from wlauto import Instrument, Parameter
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from wlauto.core import signal
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from wlauto.exceptions import DeviceError, ConfigError
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from wlauto.utils.misc import diff_tokens, write_table, check_output, as_relative
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from wlauto.utils.misc import ensure_file_directory_exists as _f
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from wlauto.utils.misc import ensure_directory_exists as _d
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from wlauto.utils.android import ApkInfo
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from wlauto.utils.types import list_of_strings
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logger = logging.getLogger(__name__)
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class FsExtractor(Instrument):
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mount_command = 'mount -t tmpfs -o size={} tmpfs {}'
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extract_timeout = 30
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tarname = 'sysfs.tar'
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DEVICE_PATH = 0
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BEFORE_PATH = 1
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AFTER_PATH = 2
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DIFF_PATH = 3
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parameters = [
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Parameter('paths', kind=list_of_strings, mandatory=True,
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description="""A list of paths to be pulled from the device. These could be directories
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as well as files.""",
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global_alias='sysfs_extract_dirs'),
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Parameter('use_tmpfs', kind=bool, default=None,
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description="""
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Specifies whether tmpfs should be used to cache sysfile trees and then pull them down
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as a tarball. This is significantly faster then just copying the directory trees from
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the device directly, bur requres root and may not work on all devices. Defaults to
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``True`` if the device is rooted and ``False`` if it is not.
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"""),
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Parameter('tmpfs_mount_point', default=None,
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description="""Mount point for tmpfs partition used to store snapshots of paths."""),
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Parameter('tmpfs_size', default='32m',
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description="""Size of the tempfs partition."""),
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]
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def initialize_tmpfs(self, context):
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if not self.device.is_rooted and self.use_tmpfs: # pylint: disable=access-member-before-definition
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raise ConfigError('use_tempfs must be False for an unrooted device.')
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elif self.use_tmpfs is None: # pylint: disable=access-member-before-definition
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self.use_tmpfs = self.device.is_rooted
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if self.use_tmpfs:
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self.on_device_before = self.device.path.join(self.tmpfs_mount_point, 'before')
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self.on_device_after = self.device.path.join(self.tmpfs_mount_point, 'after')
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if not self.device.file_exists(self.tmpfs_mount_point):
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self.device.execute('mkdir -p {}'.format(self.tmpfs_mount_point), as_root=True)
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self.device.execute(self.mount_command.format(self.tmpfs_size, self.tmpfs_mount_point),
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as_root=True)
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def setup(self, context):
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before_dirs = [
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_d(os.path.join(context.output_directory, 'before', self._local_dir(d)))
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for d in self.paths
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]
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after_dirs = [
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_d(os.path.join(context.output_directory, 'after', self._local_dir(d)))
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for d in self.paths
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]
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diff_dirs = [
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_d(os.path.join(context.output_directory, 'diff', self._local_dir(d)))
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for d in self.paths
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]
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self.device_and_host_paths = zip(self.paths, before_dirs, after_dirs, diff_dirs)
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if self.use_tmpfs:
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for d in self.paths:
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before_dir = self.device.path.join(self.on_device_before,
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self.device.path.dirname(as_relative(d)))
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after_dir = self.device.path.join(self.on_device_after,
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self.device.path.dirname(as_relative(d)))
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if self.device.file_exists(before_dir):
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self.device.execute('rm -rf {}'.format(before_dir), as_root=True)
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self.device.execute('mkdir -p {}'.format(before_dir), as_root=True)
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if self.device.file_exists(after_dir):
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self.device.execute('rm -rf {}'.format(after_dir), as_root=True)
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self.device.execute('mkdir -p {}'.format(after_dir), as_root=True)
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def slow_start(self, context):
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if self.use_tmpfs:
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for d in self.paths:
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dest_dir = self.device.path.join(self.on_device_before, as_relative(d))
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if '*' in dest_dir:
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dest_dir = self.device.path.dirname(dest_dir)
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self.device.execute('{} cp -Hr {} {}'.format(self.device.busybox, d, dest_dir),
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as_root=True, check_exit_code=False)
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else: # not rooted
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for dev_dir, before_dir, _, _ in self.device_and_host_paths:
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self.device.pull_file(dev_dir, before_dir)
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def slow_stop(self, context):
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if self.use_tmpfs:
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for d in self.paths:
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dest_dir = self.device.path.join(self.on_device_after, as_relative(d))
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if '*' in dest_dir:
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dest_dir = self.device.path.dirname(dest_dir)
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self.device.execute('{} cp -Hr {} {}'.format(self.device.busybox, d, dest_dir),
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as_root=True, check_exit_code=False)
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else: # not using tmpfs
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for dev_dir, _, after_dir, _ in self.device_and_host_paths:
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self.device.pull_file(dev_dir, after_dir)
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def update_result(self, context):
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if self.use_tmpfs:
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on_device_tarball = self.device.path.join(self.device.working_directory, self.tarname)
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on_host_tarball = self.device.path.join(context.output_directory, self.tarname + ".gz")
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self.device.execute('{} tar cf {} -C {} .'.format(self.device.busybox,
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on_device_tarball,
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self.tmpfs_mount_point),
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as_root=True)
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self.device.execute('chmod 0777 {}'.format(on_device_tarball), as_root=True)
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self.device.execute('{} gzip -f {}'.format(self.device.busybox,
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on_device_tarball))
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self.device.pull_file(on_device_tarball + ".gz", on_host_tarball)
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with tarfile.open(on_host_tarball, 'r:gz') as tf:
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tf.extractall(context.output_directory)
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self.device.delete_file(on_device_tarball + ".gz")
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os.remove(on_host_tarball)
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for paths in self.device_and_host_paths:
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after_dir = paths[self.AFTER_PATH]
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dev_dir = paths[self.DEVICE_PATH].strip('*') # remove potential trailing '*'
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if (not os.listdir(after_dir) and
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self.device.file_exists(dev_dir) and
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self.device.listdir(dev_dir)):
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self.logger.error('sysfs files were not pulled from the device.')
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self.device_and_host_paths.remove(paths) # Path is removed to skip diffing it
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for _, before_dir, after_dir, diff_dir in self.device_and_host_paths:
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_diff_sysfs_dirs(before_dir, after_dir, diff_dir)
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def teardown(self, context):
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self._one_time_setup_done = []
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def finalize(self, context):
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if self.use_tmpfs:
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try:
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self.device.execute('umount {}'.format(self.tmpfs_mount_point), as_root=True)
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except (DeviceError, CalledProcessError):
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# assume a directory but not mount point
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pass
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self.device.execute('rm -rf {}'.format(self.tmpfs_mount_point),
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as_root=True, check_exit_code=False)
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def validate(self):
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if not self.tmpfs_mount_point: # pylint: disable=access-member-before-definition
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self.tmpfs_mount_point = self.device.path.join(self.device.working_directory, 'temp-fs')
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def _local_dir(self, directory):
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return os.path.dirname(as_relative(directory).replace(self.device.path.sep, os.sep))
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class SysfsExtractor(FsExtractor):
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name = 'sysfs_extractor'
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description = """
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Collects the contest of a set of directories, before and after workload execution
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and diffs the result.
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"""
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def initialize(self, context):
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self.initialize_tmpfs(context)
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class ExecutionTimeInstrument(Instrument):
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name = 'execution_time'
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description = """
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Measure how long it took to execute the run() methods of a Workload.
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"""
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priority = 15
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def __init__(self, device, **kwargs):
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super(ExecutionTimeInstrument, self).__init__(device, **kwargs)
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self.start_time = None
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self.end_time = None
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def on_run_start(self, context):
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signal.connect(self.get_start_time, signal.BEFORE_WORKLOAD_EXECUTION, priority=self.priority)
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signal.connect(self.get_stop_time, signal.AFTER_WORKLOAD_EXECUTION, priority=self.priority)
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def get_start_time(self, context):
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self.start_time = time.time()
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def get_stop_time(self, context):
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self.end_time = time.time()
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def update_result(self, context):
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execution_time = self.end_time - self.start_time
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context.result.add_metric('execution_time', execution_time, 'seconds')
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class InterruptStatsInstrument(Instrument):
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name = 'interrupts'
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description = """
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Pulls the ``/proc/interrupts`` file before and after workload execution and diffs them
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to show what interrupts occurred during that time.
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"""
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def __init__(self, device, **kwargs):
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super(InterruptStatsInstrument, self).__init__(device, **kwargs)
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self.before_file = None
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self.after_file = None
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self.diff_file = None
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def setup(self, context):
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self.before_file = os.path.join(context.output_directory, 'before', 'proc', 'interrupts')
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self.after_file = os.path.join(context.output_directory, 'after', 'proc', 'interrupts')
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self.diff_file = os.path.join(context.output_directory, 'diff', 'proc', 'interrupts')
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def start(self, context):
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with open(_f(self.before_file), 'w') as wfh:
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wfh.write(self.device.execute('cat /proc/interrupts'))
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def stop(self, context):
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with open(_f(self.after_file), 'w') as wfh:
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wfh.write(self.device.execute('cat /proc/interrupts'))
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def update_result(self, context):
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# If workload execution failed, the after_file may not have been created.
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if os.path.isfile(self.after_file):
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_diff_interrupt_files(self.before_file, self.after_file, _f(self.diff_file))
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class DynamicFrequencyInstrument(FsExtractor):
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name = 'cpufreq'
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description = """
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Collects dynamic frequency (DVFS) settings before and after workload execution.
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"""
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tarname = 'cpufreq.tar'
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parameters = [
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Parameter('paths', mandatory=False, override=True),
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]
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def initialize(self, context):
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self.initialize_tmpfs(context)
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def setup(self, context):
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self.paths = ['/sys/devices/system/cpu']
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if self.use_tmpfs:
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self.paths.append('/sys/class/devfreq/*') # the '*' would cause problems for adb pull.
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super(DynamicFrequencyInstrument, self).setup(context)
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def validate(self):
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# temp-fs would have been set in super's validate, if not explicitly specified.
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if not self.tmpfs_mount_point.endswith('-cpufreq'): # pylint: disable=access-member-before-definition
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self.tmpfs_mount_point += '-cpufreq'
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def _diff_interrupt_files(before, after, result): # pylint: disable=R0914
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output_lines = []
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with open(before) as bfh:
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with open(after) as ofh:
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for bline, aline in izip(bfh, ofh):
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bchunks = bline.strip().split()
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while True:
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achunks = aline.strip().split()
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if achunks[0] == bchunks[0]:
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diffchunks = ['']
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diffchunks.append(achunks[0])
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diffchunks.extend([diff_tokens(b, a) for b, a
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in zip(bchunks[1:], achunks[1:])])
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output_lines.append(diffchunks)
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break
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else: # new category appeared in the after file
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diffchunks = ['>'] + achunks
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output_lines.append(diffchunks)
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try:
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aline = ofh.next()
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except StopIteration:
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break
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# Offset heading columns by one to allow for row labels on subsequent
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# lines.
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output_lines[0].insert(0, '')
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# Any "columns" that do not have headings in the first row are not actually
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# columns -- they are a single column where space-spearated words got
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# split. Merge them back together to prevent them from being
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# column-aligned by write_table.
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table_rows = [output_lines[0]]
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num_cols = len(output_lines[0])
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for row in output_lines[1:]:
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table_row = row[:num_cols]
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table_row.append(' '.join(row[num_cols:]))
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table_rows.append(table_row)
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with open(result, 'w') as wfh:
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write_table(table_rows, wfh)
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def _diff_sysfs_dirs(before, after, result): # pylint: disable=R0914
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before_files = []
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os.path.walk(before,
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lambda arg, dirname, names: arg.extend([os.path.join(dirname, f) for f in names]),
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before_files
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)
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before_files = filter(os.path.isfile, before_files)
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files = [os.path.relpath(f, before) for f in before_files]
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after_files = [os.path.join(after, f) for f in files]
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diff_files = [os.path.join(result, f) for f in files]
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for bfile, afile, dfile in zip(before_files, after_files, diff_files):
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if not os.path.isfile(afile):
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logger.debug('sysfs_diff: {} does not exist or is not a file'.format(afile))
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continue
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with open(bfile) as bfh, open(afile) as afh: # pylint: disable=C0321
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with open(_f(dfile), 'w') as dfh:
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for i, (bline, aline) in enumerate(izip_longest(bfh, afh), 1):
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if aline is None:
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logger.debug('Lines missing from {}'.format(afile))
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break
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bchunks = re.split(r'(\W+)', bline)
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achunks = re.split(r'(\W+)', aline)
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if len(bchunks) != len(achunks):
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logger.debug('Token length mismatch in {} on line {}'.format(bfile, i))
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dfh.write('xxx ' + bline)
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continue
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if ((len([c for c in bchunks if c.strip()]) == len([c for c in achunks if c.strip()]) == 2) and
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(bchunks[0] == achunks[0])):
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# if there are only two columns and the first column is the
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# same, assume it's a "header" column and do not diff it.
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dchunks = [bchunks[0]] + [diff_tokens(b, a) for b, a in zip(bchunks[1:], achunks[1:])]
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else:
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dchunks = [diff_tokens(b, a) for b, a in zip(bchunks, achunks)]
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dfh.write(''.join(dchunks))
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