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Viewing changes to bzrlib/tests/test_lsprof.py

  • Committer: Marius Kruger
  • Date: 2010-07-10 21:28:56 UTC
  • mto: (5384.1.1 integration)
  • mto: This revision was merged to the branch mainline in revision 5385.
  • Revision ID: marius.kruger@enerweb.co.za-20100710212856-uq4ji3go0u5se7hx
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bzrlib/tests/test_lsprof.py
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# Copyright (C) 2007, 2009, 2010, 2011 Canonical Ltd
 
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# Copyright (C) 2005, 2006 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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"""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 cPickle
 
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import os
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import threading
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23
 
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from .. import (
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    errors,
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    osutils,
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    tests,
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    )
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from ..tests import features
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lsprof = features.lsprof_feature.module
 
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import bzrlib
 
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from bzrlib import errors, tests
 
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class _LSProfFeature(tests.Feature):
 
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    def available(self):
 
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        try:
 
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            from bzrlib import lsprof
 
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        except ImportError:
 
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            return False
 
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        else:
 
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            return True
 
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LSProfFeature = _LSProfFeature()
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_TXT_HEADER = "   CallCount    Recursive    Total(ms)   " + \
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def _collect_stats():
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    "Collect and return some dummy profile data."
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    ret, stats = lsprof.profile(_junk_callable)
 
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    from bzrlib.lsprof import profile
 
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    ret, stats = profile(_junk_callable)
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    return stats
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class TestStats(tests.TestCaseInTempDir):
 
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class TestStatsSave(tests.TestCaseInTempDir):
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    _test_needs_features = [features.lsprof_feature]
 
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    _test_needs_features = [LSProfFeature]
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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 _temppath(self, ext):
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        return osutils.pathjoin(self.test_dir, "tmp_profile_data." + ext)
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    def test_save_to_txt(self):
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        path = self._temppath("txt")
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        self.stats.save(path)
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        with open(path) as f:
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            lines = f.readlines()
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            self.assertEqual(lines[0], _TXT_HEADER)
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    def test_save_to_callgrind(self):
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        path1 = self._temppath("callgrind")
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        self.stats.save(path1)
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        with open(path1) as f:
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            self.assertEqual(f.readline(), "events: Ticks\n")
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        path2 = osutils.pathjoin(self.test_dir, "callgrind.out.foo")
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        self.stats.save(path2)
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        with open(path2) as f:
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            self.assertEqual(f.readline(), "events: Ticks\n")
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    def _tempfile(self, ext):
 
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        dir = self.test_dir
 
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        return bzrlib.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 = bzrlib.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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        path3 = self._temppath("txt")
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        self.stats.save(path3, format="callgrind")
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        with open(path3) as f:
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            self.assertEqual(f.readline(), "events: Ticks\n")
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    def test_save_to_pickle(self):
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        path = self._temppath("pkl")
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        self.stats.save(path)
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        with open(path, 'rb') as f:
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            data1 = pickle.load(f)
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            self.assertEqual(type(data1), lsprof.Stats)
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    def test_sort(self):
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        self.stats.sort()
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        code_list = [d.inlinetime for d in self.stats.data]
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        self.assertEqual(code_list, sorted(code_list, reverse=True))
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    def test_sort_totaltime(self):
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        self.stats.sort('totaltime')
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        code_list = [d.totaltime for d in self.stats.data]
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        self.assertEqual(code_list, sorted(code_list, reverse=True))
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    def test_sort_code(self):
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        """Cannot sort by code object would need to get filename etc."""
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        self.assertRaises(ValueError, self.stats.sort, 'code')
 
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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 = cPickle.load(open(f))
 
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        self.assertEqual(type(data1), bzrlib.lsprof.Stats)
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96
 
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class TestBzrProfiler(tests.TestCase):
110
99
 
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    _test_needs_features = [features.lsprof_feature]
 
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    _test_needs_features = [LSProfFeature]
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101
 
113
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    def test_start_call_stuff_stop(self):
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        profiler = lsprof.BzrProfiler()
 
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        profiler = bzrlib.lsprof.BzrProfiler()
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        profiler.start()
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        try:
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            def a_function():
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115
 
127
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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(lsprof.BzrProfiler, 'profiler_block', 0)
 
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        self.overrideAttr(bzrlib.lsprof.BzrProfiler, 'profiler_block', 0)
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        inner_calls = []
131
 
 
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        def inner():
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            profiler = lsprof.BzrProfiler()
 
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            profiler = bzrlib.lsprof.BzrProfiler()
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            self.assertRaises(errors.BzrError, profiler.start)
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            inner_calls.append(True)
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        lsprof.profile(inner)
 
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        bzrlib.lsprof.profile(inner)
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        self.assertLength(1, inner_calls)
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126
 
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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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        # 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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135
        # is flakey, a fake Lock object can be used to trace the calls made.
148
136
        calls = []
149
 
 
150
137
        def profiled():
151
138
            calls.append('profiled')
152
 
 
153
139
        def do_profile():
154
 
            lsprof.profile(profiled)
 
140
            bzrlib.lsprof.profile(profiled)
155
141
            calls.append('after_profiled')
156
142
        thread = threading.Thread(target=do_profile)
157
 
        lsprof.BzrProfiler.profiler_lock.acquire()
 
143
        bzrlib.lsprof.BzrProfiler.profiler_lock.acquire()
158
144
        try:
159
145
            try:
160
146
                thread.start()
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147
            finally:
162
 
                lsprof.BzrProfiler.profiler_lock.release()
 
148
                bzrlib.lsprof.BzrProfiler.profiler_lock.release()
163
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        finally:
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            thread.join()
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        self.assertLength(2, calls)