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# Copyright 2015-2017 ARM Limited
#
# 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 os
import pandas as pd
import re
class SysfsExtractor(object):
"""Operate on the parameters of a dump of Workload Automation's
sysfs extractor instrumentation.
:param path: The path to the workload in a output directory created by
WA.
:type path: str
"""
def __init__(self, path):
self.thermal_path = os.path.join(path, "after", "sys", "devices",
"virtual", "thermal", "thermal_zone0")
self.properties = ["integral_cutoff", "k_d", "k_i", "k_po", "k_pu",
"policy", "sustainable_power"]
try:
sysfs_files = os.listdir(self.thermal_path)
except OSError:
sysfs_files = []
for fname in sysfs_files:
if re.search(r"cdev\d+_weight", fname):
self.properties.append(fname)
elif re.search(r"trip_point_\d+_temp", fname):
self.properties.append(fname)
def get_parameters(self):
"""Get the parameters from a sysfs extractor dump
WorkloadAutomation (WA) can dump sysfs values using its
sysfs_extractor instrumentation. Parse the tree and return the
thermal parameters as a dict of key and values where the keys are
the names of the files and values its corresponding values.
"""
ret = {}
for property_name in self.properties:
property_path = os.path.join(self.thermal_path, property_name)
if not os.path.isfile(property_path):
continue
with open(property_path) as fin:
contents = fin.read()
# Trim trailing newline
contents = contents[:-1]
try:
ret[property_name] = int(contents)
except ValueError:
ret[property_name] = contents
return ret
def pretty_print_in_ipython(self):
"""Print parameters extracted from sysfs from a WA run in a pretty HTML table.
This won't work if the code is not running in an ipython notebook."""
from IPython.display import display, HTML
params = self.get_parameters()
# Don't print anything if we couldn't find any parameters
if len(params) == 0:
return
params_items = [(key, [value]) for key, value in sorted(params.items())]
dfr = pd.DataFrame.from_items(params_items, orient="index",
columns=["Value"])
display(HTML(dfr.to_html(header=False)))
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