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  • Committer: Jelmer Vernooij
  • Date: 2017-08-07 11:49:46 UTC
  • mto: (6747.3.4 avoid-set-revid-3)
  • mto: This revision was merged to the branch mainline in revision 6750.
  • Revision ID: jelmer@jelmer.uk-20170807114946-luclmxuawyzhpiot
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breezy/tests/test_lsprof.py
 
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# Copyright (C) 2007, 2009, 2010, 2011 Canonical Ltd
 
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#
 
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# This program is free software; you can redistribute it and/or modify
 
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# it under the terms of the GNU General Public License as published by
 
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# the Free Software Foundation; either version 2 of the License, or
 
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# (at your option) any later version.
 
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#
 
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# This program is distributed in the hope that it will be useful,
 
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
 
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 
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# GNU General Public License for more details.
 
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#
 
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# You should have received a copy of the GNU General Public License
 
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# along with this program; if not, write to the Free Software
 
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 
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"""Tests for profiling data collection."""
 
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try:
 
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    import cPickle as pickle
 
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except ImportError:
 
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    import pickle
 
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import threading
 
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import breezy
 
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from .. import errors, tests
 
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from . import (
 
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    features,
 
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    )
 
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_TXT_HEADER = "   CallCount    Recursive    Total(ms)   " + \
 
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    "Inline(ms) module:lineno(function)\n"
 
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def _junk_callable():
 
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    "A simple routine to profile."
 
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    result = sorted(['abc', 'def', 'ghi'])
 
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def _collect_stats():
 
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    "Collect and return some dummy profile data."
 
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    from breezy.lsprof import profile
 
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    ret, stats = profile(_junk_callable)
 
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    return stats
 
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class TestStatsSave(tests.TestCaseInTempDir):
 
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    _test_needs_features = [features.lsprof_feature]
 
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    def setUp(self):
 
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        super(tests.TestCaseInTempDir, self).setUp()
 
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        self.stats = _collect_stats()
 
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    def _tempfile(self, ext):
 
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        dir = self.test_dir
 
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        return breezy.osutils.pathjoin(dir, "tmp_profile_data." + ext)
 
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    def test_stats_save_to_txt(self):
 
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        f = self._tempfile("txt")
 
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        self.stats.save(f)
 
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        lines = open(f).readlines()
 
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        self.assertEqual(lines[0], _TXT_HEADER)
 
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    def test_stats_save_to_callgrind(self):
 
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        f = self._tempfile("callgrind")
 
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        self.stats.save(f)
 
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        lines = open(f).readlines()
 
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        self.assertEqual(lines[0], "events: Ticks\n")
 
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        f = breezy.osutils.pathjoin(self.test_dir, "callgrind.out.foo")
 
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        self.stats.save(f)
 
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        lines = open(f).readlines()
 
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        self.assertEqual(lines[0], "events: Ticks\n")
 
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        # Test explicit format nommination
 
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        f2 = self._tempfile("txt")
 
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        self.stats.save(f2, format="callgrind")
 
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        lines2 = open(f2).readlines()
 
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        self.assertEqual(lines2[0], "events: Ticks\n")
 
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    def test_stats_save_to_pickle(self):
 
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        f = self._tempfile("pkl")
 
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        self.stats.save(f)
 
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        data1 = pickle.load(open(f))
 
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        self.assertEqual(type(data1), breezy.lsprof.Stats)
 
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class TestBzrProfiler(tests.TestCase):
 
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    _test_needs_features = [features.lsprof_feature]
 
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    def test_start_call_stuff_stop(self):
 
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        profiler = breezy.lsprof.BzrProfiler()
 
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        profiler.start()
 
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        try:
 
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            def a_function():
 
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                pass
 
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            a_function()
 
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        finally:
 
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            stats = profiler.stop()
 
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        stats.freeze()
 
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        lines = [str(data) for data in stats.data]
 
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        lines = [line for line in lines if 'a_function' in line]
 
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        self.assertLength(1, lines)
 
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    def test_block_0(self):
 
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        # When profiler_block is 0, reentrant profile requests fail.
 
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        self.overrideAttr(breezy.lsprof.BzrProfiler, 'profiler_block', 0)
 
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        inner_calls = []
 
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        def inner():
 
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            profiler = breezy.lsprof.BzrProfiler()
 
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            self.assertRaises(errors.BzrError, profiler.start)
 
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            inner_calls.append(True)
 
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        breezy.lsprof.profile(inner)
 
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        self.assertLength(1, inner_calls)
 
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    def test_block_1(self):
 
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        # When profiler_block is 1, concurrent profiles serialise.
 
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        # This is tested by manually acquiring the profiler lock, then
 
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        # starting a thread that tries to profile, and releasing the lock. 
 
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        # We know due to test_block_0 that two profiles at once hit the lock,
 
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        # so while this isn't perfect (we'd want a callback on the lock being
 
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        # entered to allow lockstep evaluation of the actions), its good enough
 
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        # to be confident regressions would be caught. Alternatively, if this
 
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        # is flakey, a fake Lock object can be used to trace the calls made.
 
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        calls = []
 
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        def profiled():
 
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            calls.append('profiled')
 
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        def do_profile():
 
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            breezy.lsprof.profile(profiled)
 
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            calls.append('after_profiled')
 
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        thread = threading.Thread(target=do_profile)
 
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        breezy.lsprof.BzrProfiler.profiler_lock.acquire()
 
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        try:
 
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            try:
 
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                thread.start()
 
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            finally:
 
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                breezy.lsprof.BzrProfiler.profiler_lock.release()
 
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        finally:
 
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            thread.join()
 
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        self.assertLength(2, calls)