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#!/usr/bin/python
# Copyright (C) 2017-2018 Free Software Foundation, Inc.
# This file is part of the GNU C Library.
#
# The GNU C Library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# The GNU C Library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with the GNU C Library; if not, see
# <http://www.gnu.org/licenses/>.
"""Compare results of string functions
Given a string benchmark result file, print a table with comparisons with a
baseline. The baseline is the first function, which typically is the builtin
function.
"""
import matplotlib as mpl
mpl.use('Agg')
import sys
import os
import json
import pylab
import argparse
try:
import jsonschema as validator
except ImportError:
print('Could not find jsonschema module.')
raise
def parse_file(filename, schema_filename):
try:
with open(schema_filename, 'r') as schemafile:
schema = json.load(schemafile)
with open(filename, 'r') as benchfile:
bench = json.load(benchfile)
validator.validate(bench, schema)
return bench
except FileNotFoundError:
sys.stderr.write('Invalid input file %s.\n' % filename)
sys.exit(os.EX_NOINPUT)
def draw_graph(f, v, ifuncs, results):
"""Plot graphs for functions
Plot line graphs for each of the ifuncs
Args:
f: Function name
v: Benchmark variant for the function.
ifuncs: List of ifunc names
results: Dictionary of results for each test criterion
"""
print('Generating graph for %s, variant \'%s\'' % (f, v))
xkeys = results.keys()
pylab.clf()
fig = pylab.figure(frameon=False)
fig.set_size_inches(32, 18)
pylab.ylabel('Performance improvement from base')
X = range(len(xkeys))
pylab.xticks(X, xkeys)
i = 0
while i < len(ifuncs):
Y = [results[k][i] for k in xkeys]
lines = pylab.plot(X, Y, label=':'+ifuncs[i])
i = i + 1
pylab.legend()
pylab.grid()
pylab.savefig('%s-%s.png' % (f, v), bbox_inches='tight')
def process_results(results, attrs, funcs, base_func, graph, no_diff, no_header):
""" Process results and print them
Args:
results: JSON dictionary of results
attrs: Attributes that form the test criteria
funcs: Functions that are selected
"""
for f in results['functions'].keys():
v = results['functions'][f]['bench-variant']
selected = {}
index = 0
base_index = 0
if funcs:
ifuncs = []
first_func = True
for i in results['functions'][f]['ifuncs']:
if i in funcs:
if first_func:
base_index = index
first_func = False
selected[index] = 1
ifuncs.append(i)
else:
selected[index] = 0
index += 1
else:
ifuncs = results['functions'][f]['ifuncs']
for i in ifuncs:
selected[index] = 1
index += 1
if base_func:
try:
base_index = results['functions'][f]['ifuncs'].index(base_func)
except ValueError:
sys.stderr.write('Invalid -b "%s" parameter. Options: %s.\n' %
(base_func, ', '.join(results['functions'][f]['ifuncs'])))
sys.exit(os.EX_DATAERR)
if not no_header:
print('Function: %s' % f)
print('Variant: %s' % v)
print("%36s%s" % (' ', '\t'.join(ifuncs)))
print("=" * 120)
graph_res = {}
for res in results['functions'][f]['results']:
try:
attr_list = ['%s=%s' % (a, res[a]) for a in attrs]
except KeyError as ke:
sys.stderr.write('Invalid -a %s parameter. Options: %s.\n'
% (ke, ', '.join([a for a in res.keys() if a != 'timings'])))
sys.exit(os.EX_DATAERR)
i = 0
key = ', '.join(attr_list)
sys.stdout.write('%36s: ' % key)
graph_res[key] = res['timings']
for t in res['timings']:
if selected[i]:
sys.stdout.write ('%12.2f' % t)
if not no_diff:
if i != base_index:
base = res['timings'][base_index]
diff = (base - t) * 100 / base
sys.stdout.write (' (%6.2f%%)' % diff)
sys.stdout.write('\t')
i = i + 1
print('')
if graph:
draw_graph(f, v, results['functions'][f]['ifuncs'], graph_res)
def main(args):
"""Program Entry Point
Take a string benchmark output file and compare timings.
"""
base_func = None
filename = args.input
schema_filename = args.schema
base_func = args.base
attrs = args.attributes.split(',')
if args.functions:
funcs = args.functions.split(',')
if base_func and not base_func in funcs:
print('Baseline function (%s) not found.' % base_func)
sys.exit(os.EX_DATAERR)
else:
funcs = None
results = parse_file(args.input, args.schema)
process_results(results, attrs, funcs, base_func, args.graph, args.no_diff, args.no_header)
return os.EX_OK
if __name__ == '__main__':
parser = argparse.ArgumentParser()
# The required arguments.
req = parser.add_argument_group(title='required arguments')
req.add_argument('-a', '--attributes', required=True,
help='Comma separated list of benchmark attributes.')
req.add_argument('-i', '--input', required=True,
help='Input JSON benchmark result file.')
req.add_argument('-s', '--schema', required=True,
help='Schema file to validate the result file.')
# Optional arguments.
parser.add_argument('-f', '--functions',
help='Comma separated list of functions.')
parser.add_argument('-b', '--base',
help='IFUNC variant to set as baseline.')
parser.add_argument('-g', '--graph', action='store_true',
help='Generate a graph from results.')
parser.add_argument('--no-diff', action='store_true',
help='Do not print the difference from baseline.')
parser.add_argument('--no-header', action='store_true',
help='Do not print the header.')
args = parser.parse_args()
sys.exit(main(args))
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