mirror of
https://github.com/ARM-software/workload-automation.git
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95 lines
3.6 KiB
Python
95 lines
3.6 KiB
Python
# Copyright 2020 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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import os
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import time
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from datetime import datetime, timedelta
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import pandas as pd
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from wa import Instrument, Parameter, File, InstrumentError
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class ProcStatCollector(Instrument):
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name = 'proc_stat'
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description = '''
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Collect CPU load information from /proc/stat.
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'''
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parameters = [
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Parameter('period', int, default=5,
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constraint=lambda x: x > 0,
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description='''
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Time (in seconds) between collections.
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'''),
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]
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def initialize(self, context): # pylint: disable=unused-argument
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self.host_script = context.get_resource(File(self, 'gather-load.sh'))
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self.target_script = self.target.install(self.host_script)
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self.target_output = self.target.get_workpath('proc-stat-raw.csv')
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self.stop_file = self.target.get_workpath('proc-stat-stop.signal')
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def setup(self, context): # pylint: disable=unused-argument
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self.command = '{} sh {} {} {} {} {}'.format(
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self.target.busybox,
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self.target_script,
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self.target.busybox,
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self.target_output,
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self.period,
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self.stop_file,
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)
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self.target.remove(self.target_output)
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self.target.remove(self.stop_file)
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def start(self, context): # pylint: disable=unused-argument
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self.target.kick_off(self.command)
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def stop(self, context): # pylint: disable=unused-argument
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self.target.execute('{} touch {}'.format(self.target.busybox, self.stop_file))
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def update_output(self, context):
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self.logger.debug('Waiting for collector script to terminate...')
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self._wait_for_script()
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self.logger.debug('Waiting for collector script to terminate...')
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host_output = os.path.join(context.output_directory, 'proc-stat-raw.csv')
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self.target.pull(self.target_output, host_output)
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context.add_artifact('proc-stat-raw', host_output, kind='raw')
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df = pd.read_csv(host_output)
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no_ts = df[df.columns[1:]]
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deltas = (no_ts - no_ts.shift())
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total = deltas.sum(axis=1)
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util = (total - deltas.idle) / total * 100
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out_df = pd.concat([df.timestamp, util], axis=1).dropna()
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out_df.columns = ['timestamp', 'cpu_util']
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util_file = os.path.join(context.output_directory, 'proc-stat.csv')
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out_df.to_csv(util_file, index=False)
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context.add_artifact('proc-stat', util_file, kind='data')
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def finalize(self, context): # pylint: disable=unused-argument
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if self.cleanup_assets and getattr(self, 'target_output'):
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self.target.remove(self.target_output)
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self.target.remove(self.target_script)
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def _wait_for_script(self):
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start_time = datetime.utcnow()
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timeout = timedelta(seconds=300)
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while self.target.file_exists(self.stop_file):
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delta = datetime.utcnow() - start_time
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if delta > timeout:
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raise InstrumentError('Timed out wating for /proc/stat collector to terminate..')
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