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# Copyright (C) 2007, 2009, 2010, 2011 Canonical Ltd
#
# 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 2 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, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
"""Tests for profiling data collection."""
import cPickle
import threading
import bzrlib
from bzrlib import errors, tests
from bzrlib.tests import (
features,
)
_TXT_HEADER = " CallCount Recursive Total(ms) " + \
"Inline(ms) module:lineno(function)\n"
def _junk_callable():
"A simple routine to profile."
result = sorted(['abc', 'def', 'ghi'])
def _collect_stats():
"Collect and return some dummy profile data."
from bzrlib.lsprof import profile
ret, stats = profile(_junk_callable)
return stats
class TestStatsSave(tests.TestCaseInTempDir):
_test_needs_features = [features.lsprof_feature]
def setUp(self):
super(tests.TestCaseInTempDir, self).setUp()
self.stats = _collect_stats()
def _tempfile(self, ext):
dir = self.test_dir
return bzrlib.osutils.pathjoin(dir, "tmp_profile_data." + ext)
def test_stats_save_to_txt(self):
f = self._tempfile("txt")
self.stats.save(f)
lines = open(f).readlines()
self.assertEqual(lines[0], _TXT_HEADER)
def test_stats_save_to_callgrind(self):
f = self._tempfile("callgrind")
self.stats.save(f)
lines = open(f).readlines()
self.assertEqual(lines[0], "events: Ticks\n")
f = bzrlib.osutils.pathjoin(self.test_dir, "callgrind.out.foo")
self.stats.save(f)
lines = open(f).readlines()
self.assertEqual(lines[0], "events: Ticks\n")
# Test explicit format nommination
f2 = self._tempfile("txt")
self.stats.save(f2, format="callgrind")
lines2 = open(f2).readlines()
self.assertEqual(lines2[0], "events: Ticks\n")
def test_stats_save_to_pickle(self):
f = self._tempfile("pkl")
self.stats.save(f)
data1 = cPickle.load(open(f))
self.assertEqual(type(data1), bzrlib.lsprof.Stats)
class TestBzrProfiler(tests.TestCase):
_test_needs_features = [features.lsprof_feature]
def test_start_call_stuff_stop(self):
profiler = bzrlib.lsprof.BzrProfiler()
profiler.start()
try:
def a_function():
pass
a_function()
finally:
stats = profiler.stop()
stats.freeze()
lines = [str(data) for data in stats.data]
lines = [line for line in lines if 'a_function' in line]
self.assertLength(1, lines)
def test_block_0(self):
# When profiler_block is 0, reentrant profile requests fail.
self.overrideAttr(bzrlib.lsprof.BzrProfiler, 'profiler_block', 0)
inner_calls = []
def inner():
profiler = bzrlib.lsprof.BzrProfiler()
self.assertRaises(errors.BzrError, profiler.start)
inner_calls.append(True)
bzrlib.lsprof.profile(inner)
self.assertLength(1, inner_calls)
def test_block_1(self):
# When profiler_block is 1, concurrent profiles serialise.
# This is tested by manually acquiring the profiler lock, then
# starting a thread that tries to profile, and releasing the lock.
# We know due to test_block_0 that two profiles at once hit the lock,
# so while this isn't perfect (we'd want a callback on the lock being
# entered to allow lockstep evaluation of the actions), its good enough
# to be confident regressions would be caught. Alternatively, if this
# is flakey, a fake Lock object can be used to trace the calls made.
calls = []
def profiled():
calls.append('profiled')
def do_profile():
bzrlib.lsprof.profile(profiled)
calls.append('after_profiled')
thread = threading.Thread(target=do_profile)
bzrlib.lsprof.BzrProfiler.profiler_lock.acquire()
try:
try:
thread.start()
finally:
bzrlib.lsprof.BzrProfiler.profiler_lock.release()
finally:
thread.join()
self.assertLength(2, calls)
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