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EnergyMeasurement: Adds a wrapper for devlib instrumentation
The instrument allows for various devlib instruments (currently only daq and energy_probe) to be used in WA to collect energy measurements.
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Marc Bonnici
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249
wa/instrumentation/energy_measurement.py
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249
wa/instrumentation/energy_measurement.py
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# Copyright 2013-2017 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,E1101
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from __future__ import division
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import os
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from collections import defaultdict
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from devlib.instrument import CONTINUOUS
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from devlib.instrument.energy_probe import EnergyProbeInstrument
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from devlib.instrument.daq import DaqInstrument
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from wa import Instrument, Parameter
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from wa.framework import pluginloader
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from wa.framework.plugin import Plugin
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from wa.framework.exception import ConfigError
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from wa.utils.types import list_of_strings, list_of_ints, list_or_string
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class EnergyInstrumentBackend(Plugin):
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name = None
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kind = 'energy_instrument_backend'
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parameters = []
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instrument = None
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def get_parameters(self):
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return {p.name : p for p in self.parameters}
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def validate_parameters(self, params):
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pass
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class DAQBackend(EnergyInstrumentBackend):
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name = 'daq'
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parameters = [
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Parameter('resistor_values', kind=list_of_ints,
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description="""
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The values of resistors (in Ohms) across which the voltages
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are measured on.
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"""),
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Parameter('labels', kind=list_of_strings,
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description="""
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'List of port labels. If specified, the length of the list
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must match the length of ``resistor_values``.
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"""),
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Parameter('host', kind=str, default='localhost',
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description="""
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The host address of the machine that runs the daq Server which
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the instrument communicates with.
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"""),
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Parameter('port', kind=int, default=45677,
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description="""
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The port number for daq Server in which daq instrument
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communicates with.
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"""),
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Parameter('device_id', kind=str, default='Dev1',
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description="""
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The ID under which the DAQ is registered with the driver.
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"""),
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Parameter('v_range', kind=str, default=2.5,
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description="""
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Specifies the voltage range for the SOC voltage channel on the
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DAQ (please refer to :ref:`daq_setup` for details).
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"""),
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Parameter('dv_range', kind=str, default=0.2,
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description="""
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Specifies the voltage range for the resistor voltage channel
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on the DAQ (please refer to :ref:`daq_setup` for details).
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"""),
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Parameter('sample_rate_hz', kind=str, default=10000,
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description="""
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Specify the sample rate in Hz.
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"""),
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Parameter('channel_map', kind=list_of_ints,
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default=(0, 1, 2, 3, 4, 5, 6, 7, 16, 17, 18, 19, 20, 21, 22, 23),
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description="""
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Represents mapping from logical AI channel number to physical
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connector on the DAQ (varies between DAQ models). The default
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assumes DAQ 6363 and similar with AI channels on connectors
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0-7 and 16-23.
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""")
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]
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instrument = DaqInstrument
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def validate_parameters(self, params):
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if not params.get('resistor_values'):
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raise ConfigError('Mandatory parameter "resistor_values" is not set.')
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if params.get('labels'):
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if len(params.get('labels')) != len(params.get('resistor_values')):
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msg = 'Number of DAQ port labels does not match the number of resistor values.'
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raise ConfigError(msg)
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class EnergyProbeBackend(EnergyInstrumentBackend):
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name = 'energy_probe'
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parameters = [
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Parameter('resistor_values', kind=list_of_ints,
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description="""
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The values of resistors (in Ohms) across which the voltages
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are measured on.
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"""),
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Parameter('labels', kind=list_of_strings,
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description="""
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'List of port labels. If specified, the length of the list
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must match the length of ``resistor_values``.
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"""),
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Parameter('device_entry', kind=str, default='/dev/ttyACM0',
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description="""
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Path to /dev entry for the energy probe (it should be /dev/ttyACMx)
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"""),
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]
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instrument = EnergyProbeInstrument
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def validate_parameters(self, params):
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if not params.get('resistor_values'):
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raise ConfigError('Mandatory parameter "resistor_values" is not set.')
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if params.get('labels'):
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if len(params.get('labels')) != len(params.get('resistor_values')):
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msg = 'Number of Energy Probe port labels does not match the number of resistor values.'
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raise ConfigError(msg)
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class EnergyMeasurement(Instrument):
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name = 'energy_measurement'
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description = """
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This instrument is designed to be used as an interface to the various
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energy measurement instruments located in devlib.
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"""
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parameters = [
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Parameter('instrument', kind=str, mandatory=True,
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allowed_values=['daq', 'energy_probe'],
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description="""
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Specify the energy instrumentation to be enabled.
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"""),
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Parameter('instrument_parameters', kind=dict, default={},
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description="""
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Specify the parameters used to initialize the desired
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instrumentation.
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"""),
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Parameter('sites', kind=list_or_string, default=[],
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description="""
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Specify which sites measurements should be collected
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from, if not specified the measurements will be
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collected for all available sites.
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"""),
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Parameter('kinds', kind=list_or_string, default=[],
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description="""
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Specify the kinds of measurements should be collected,
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if not specified measurements will be
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collected for all available kinds.
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"""),
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Parameter('channels', kind=list_or_string, default=[],
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description="""
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Specify the channels to be collected,
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if not specified the measurements will be
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collected for all available channels.
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"""),
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]
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def __init__(self, target, loader=pluginloader, **kwargs):
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super(EnergyMeasurement, self).__init__(target, **kwargs)
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self.instrumentation = None
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self.measurement_csv = None
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self.loader = loader
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self.backend = self.loader.get_plugin(self.instrument)
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self.params = {}
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if self.backend.instrument.mode != CONTINUOUS:
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msg = '{} instrument does not support continuous measurement collection'
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raise ConfigError(msg.format(self.instrument))
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supported_params = self.backend.get_parameters()
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for name, value in supported_params.iteritems():
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if name in self.instrument_parameters:
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self.params[name] = self.instrument_parameters[name]
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elif value.default:
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self.params[name] = value.default
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self.backend.validate_parameters(self.params)
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def initialize(self, context):
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self.instrumentation = self.backend.instrument(self.target, **self.params)
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for channel in self.channels:
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if not self.instrumentation.get_channels(channel):
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raise ConfigError('No channels found for "{}"'.format(channel))
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def setup(self, context):
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self.instrumentation.reset(sites=self.sites,
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kinds=self.kinds,
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channels=self.channels)
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def start(self, context):
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self.instrumentation.start()
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def stop(self, context):
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self.instrumentation.stop()
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def update_result(self, context):
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outfile = os.path.join(context.output_directory, 'energy_instrument_output.csv')
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self.measurement_csv = self.instrumentation.get_data(outfile)
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context.add_artifact('energy_instrument_output', outfile, 'data')
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self.extract_metrics(context)
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def extract_metrics(self, context):
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measurements = self.measurement_csv.itermeasurements()
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energy_results = defaultdict(dict)
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power_results = defaultdict(int)
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for count, row in enumerate(measurements):
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for entry in row:
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channel = entry.channel
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if channel.kind == 'energy':
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if count == 0:
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energy_results[channel.site]['start'] = entry.value
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else:
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energy_results[channel.site]['end'] = entry.value
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elif channel.kind == 'power':
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power_results[channel.site] += entry.value
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for site in energy_results:
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total_energy = energy_results[site]['end'] - energy_results[site]['start']
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context.add_metric('{}_energy'.format(site), total_energy, 'joules')
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for site in power_results:
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power = power_results[site] / count + 1 #pylint: disable=undefined-loop-variable
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context.add_metric('{}_power'.format(site), power, 'watts')
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