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# Copyright 2015 Lars Wirzenius
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
# =*= License: GPL-3+ =*=
import os
import pstats
import shutil
import StringIO
import tempfile
import time
import cliapp
import obbenchlib
class Benchmarker(object):
profile_name = 'obnam.prof'
def __init__(self):
self.statedir = None
self.gitdir = None
self.resultdir = None
self._livedir = None
self._repodir = None
self._srcdir = None
self._config = None
self._restored = None
self._timestamp = None
self.spec = None
def run_benchmarks(self, ref):
print
print 'Running benchmarks for', ref
print
if not os.path.exists(self.resultdir):
os.mkdir(self.resultdir)
# We want to use the same timestamp for all benchmarks. This
# is necessary so that all the benchmarks from one run for the
# same commit are easy to align.
self._timestamp = time.strftime('%Y-%m-%d %H:%M:%S')
for benchmark in self.spec['benchmarks']:
tempdir = self.create_temp_dir()
self._livedir = self.create_subdir(tempdir, 'live')
self._repodir = self.create_subdir(tempdir, 'repo')
self._srcdir = self.create_subdir(tempdir, 'src')
self._restored = self.create_subdir(tempdir, 'restored')
self._logfile = os.path.join(tempdir, 'obnam.log')
self._config = self.prepare_obnam_config(tempdir)
self.prepare_obnam(ref)
result = self.run_benchmark(benchmark)
result.save_in_dir(self.resultdir)
print 'Cleaning up'
self.remove_temp_dir(tempdir)
def create_temp_dir(self):
return tempfile.mkdtemp()
def create_subdir(self, parent, child):
pathname = os.path.join(parent, child)
os.mkdir(pathname)
return pathname
def remove_temp_dir(self, tempdir):
shutil.rmtree(tempdir)
def prepare_obnam_config(self, tempdir):
config = os.path.join(tempdir, 'obnam.conf')
with open(config, 'w') as f:
f.write('[config]\n')
f.write('quiet = no\n')
f.write('repository = %s\n' % self._repodir)
f.write('root = %s\n' % self._livedir)
f.write('log-level = debug\n')
f.write('log = %s\n' % self._logfile)
for key, value in self.spec.get('obnam_config', {}).items():
f.write('%s = %s\n' % (key, value))
return config
def prepare_obnam(self, ref):
cliapp.runcmd(['git', 'clone', self.gitdir, self._srcdir])
cliapp.runcmd(['git', 'checkout', ref], cwd=self._srcdir)
cliapp.runcmd(
['python', 'setup.py', 'build_ext', '-i'],
cwd=self._srcdir)
def run_benchmark(self, benchmark):
print 'Running benchmark {}'.format(benchmark['name'])
result = obbenchlib.Result()
result.benchmark_name = benchmark['name']
result.run_timestamp = self._timestamp
result.commit_date = self.get_commit_date()
result.commit_timestamp = self.get_commit_timestamp()
result.commit_id = self.get_commit_id()
for step in benchmark['steps']:
result.start_step()
self.run_step(result, step)
print
return result
def get_commit_date(self):
timestamp = self.get_commit_timestamp()
return timestamp.split()[0]
def get_commit_timestamp(self):
output = cliapp.runcmd(
['git', 'show', '--date=iso', 'HEAD'],
cwd=self._srcdir)
for line in output.splitlines():
if line.startswith('Date:'):
return line[len('Date:'):].strip()
raise Exception('commit has no Date:')
def get_commit_id(self):
output = cliapp.runcmd(['git', 'rev-parse', 'HEAD'], cwd=self._srcdir)
return output.strip()
def run_step(self, result, step):
if 'live' in step:
self.run_step_live(result, step['live'])
self.run_step_obnam(result, step['obnam'])
def run_step_live(self, result, shell_command):
print 'Running live:', shell_command
started = time.time()
cliapp.runcmd(['sh', '-euc', shell_command], cwd=self._livedir)
duration = time.time() - started
result.set_value('live', 'duration', duration)
def run_step_obnam(self, result, obnam_subcommand):
print 'Running obnam:', obnam_subcommand
# Remove Obnam log file so it we later collect only the log
# for one invocation.
if os.path.exists(self._logfile):
os.remove(self._logfile)
funcs = {
'backup': self.run_obnam_backup,
'restore': self.run_obnam_restore,
'forget': self.run_obnam_forget,
}
started = time.time()
funcs[obnam_subcommand]()
duration = time.time() - started
result.set_value(obnam_subcommand, 'duration', duration)
result.set_value(obnam_subcommand, 'profile', self.read_profile())
result.set_value(
obnam_subcommand, 'profile-text', self.read_profile_text())
log = self.read_log_file()
result.set_value(obnam_subcommand, 'log', log)
result.set_value(obnam_subcommand, 'vmrss', self.find_max_vmrss(log))
def run_obnam_backup(self):
self.run_obnam(['backup'])
def run_obnam_restore(self):
cliapp.runcmd(['find', self._restored, '-delete'])
self.run_obnam(['restore', '--to', self._restored])
def run_obnam_forget(self):
self.run_obnam(['forget'])
def run_obnam(self, args):
env = dict(os.environ)
env['OBNAM_PROFILE'] = self.profile_name
opts = ['--no-default-config', '--config', self._config]
cliapp.runcmd(
['./obnam'] + opts + args,
env=env,
cwd=self._srcdir)
def read_profile(self):
filename = os.path.join(self._srcdir, self.profile_name)
with open(filename) as f:
return f.read()
def read_log_file(self):
with open(self._logfile) as f:
return f.read()
def find_max_vmrss(self, log_text):
vmrss = 0
for line in log_text.splitlines():
words = line.split()
if len(words) == 6 and words[2:4] == ['DEBUG', 'VmRSS:']:
vmrss = max(vmrss, int(words[4]))
return vmrss * 1024
def read_profile_text(self):
f = StringIO.StringIO()
filename = os.path.join(self._srcdir, self.profile_name)
p = pstats.Stats(filename, stream=f)
p.strip_dirs()
p.sort_stats('cumulative')
p.print_stats()
p.print_callees()
return f.getvalue()
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