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# Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""Routines for reading performance results from a directory.
The directory should match the format created by the 'bootperf'
script; see comments in that script for a summary of the layout.
"""
import fnmatch
import os
import re
import resultset
_PERF_KEYVAL_PATTERN = re.compile("(.*){perf}=(.*)\n")
def _ReadKeyvalFile(results, file_):
"""Read an autotest keyval file, and process the results.
The `file_` parameter is a file object with contents in autotest
perf keyval format:
<keyname>{perf}=<value>
Each iteration of the test is terminated with a single blank line,
including the last iteration. Each iteration's results are added
to the `results` parameter, which should be an instance of
TestResultSet.
@param results A TestResultSet where the result data will be
collected.
@param file_ File object for the results file to be read.
"""
kvd = {}
for line in iter(file_):
if line == "\n":
results.AddIterationResults(kvd)
kvd = {}
continue
m = _PERF_KEYVAL_PATTERN.match(line)
if m is None:
continue
kvd[m.group(1)] = m.group(2)
_RESULTS_PATH = "summary/platform_BootPerfServer/results/keyval"
def ReadResultsDirectory(dir_):
"""Process results from a 'bootperf' output directory.
The accumulated results are returned in a newly created
TestResultSet object.
@param dir_ The directory containing the test results keyval file.
"""
res_set = resultset.TestResultSet(dir_)
dirlist = fnmatch.filter(os.listdir(dir_), "run.???")
dirlist.sort()
for rundir in dirlist:
keyval_path = os.path.join(dir_, rundir, _RESULTS_PATH)
try:
kvf = open(keyval_path)
except IOError:
continue
_ReadKeyvalFile(res_set, kvf)
res_set.FinalizeResults()
return res_set