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1 #!/usr/bin/env python | |
2 # Copyright (c) 2012 The Chromium Authors. All rights reserved. | |
3 # Use of this source code is governed by a BSD-style license that can be | |
4 # found in the LICENSE file. | |
5 | |
6 import logging | |
7 import os | |
8 import tempfile | |
9 | |
10 import devtools_test_base | |
11 import pyauto_functional # Must be imported before pyauto | |
12 import pyauto | |
13 import pyauto_utils | |
14 | |
15 | |
16 class DevToolsInstrumentedObjectsCheck(devtools_test_base.DevToolsTestBase): | |
17 """Test for checking that all instrumented objects are allocated by tcmalloc. | |
18 | |
19 This test navigates the browser to a test page, then takes native memory | |
20 snapshot over remote debugging protocol and prints the number of objects | |
21 that were counted by the DevTools memory instrumentation and how many of | |
22 them have not been allocated by tcmalloc. Ideally the latter number should | |
23 be 0. | |
24 | |
25 The test starts browser with HEAPPROFILE environment variable to enable | |
26 tcmalloc heap profiler which is required by the memory instrumentation to | |
27 check which of the instrumented objects have actually been allocated on the | |
28 heap. | |
29 | |
30 The test uses Web Page Replay server as a proxy that allows to replay | |
31 the same state of the test pages and avoid heavy network traffic on the | |
32 real web sites. See webpagereplay.ReplayServer documentation to learn how | |
33 to record new page archives. | |
34 """ | |
35 | |
36 def setUp(self): | |
37 # Make sure Chrome is started with tcmalloc heap profiler enabled. Dump | |
38 # profiles into a temporary directory that will be destroyed when the test | |
39 # completes. | |
40 self._tempdir = tempfile.mkdtemp(prefix='devtools-test') | |
41 os.environ['HEAPPROFILE'] = os.path.join(self._tempdir, 'heap-profile.') | |
42 # We are not going to use dumped profile so set the interval big enough | |
dennis_jeffrey
2012/10/04 01:16:33
add period at end of sentence
yurys
2012/10/04 15:07:47
Done.
| |
43 os.environ['HEAP_PROFILE_TIME_INTERVAL'] = str(60 * 60) | |
dennis_jeffrey
2012/10/04 01:16:33
is there a way to turn off the profile dump rather
yurys
2012/10/04 15:07:47
If the environment variable is omitted then the pr
| |
44 super(DevToolsInstrumentedObjectsCheck, self).setUp() | |
45 | |
46 def tearDown(self): | |
47 super(DevToolsInstrumentedObjectsCheck, self).tearDown() | |
48 del os.environ['HEAPPROFILE'] | |
49 del os.environ['HEAP_PROFILE_TIME_INTERVAL'] | |
50 if self._tempdir: | |
51 pyauto_utils.RemovePath(self._tempdir) | |
52 | |
53 def testNytimes(self): | |
54 self.RunTestWithUrl('http://www.nytimes.com/') | |
55 | |
56 def testCnn(self): | |
57 self.RunTestWithUrl('http://www.cnn.com/') | |
58 | |
59 def testGoogle(self): | |
60 self.RunTestWithUrl('http://www.google.com/') | |
61 | |
62 def PrintTestResult(self, hostname, snapshot): | |
63 total = snapshot.GetProcessPrivateMemorySize() | |
64 counted_objects = snapshot.GetInstrumentedObjectsCount() | |
65 counted_unknown_objects = snapshot.GetNumberOfInstrumentedObjectsNotInHeap() | |
66 logging.info('Got data for: %s, objects count = %d (unknown = %d) ' % | |
67 (hostname, counted_objects, counted_unknown_objects)) | |
68 graph_name = 'DevTools Instrumented Objects - ' + hostname | |
69 pyauto_utils.PrintPerfResult(graph_name, 'Reported instrumented objects', | |
70 counted_objects, 'objects') | |
71 pyauto_utils.PrintPerfResult(graph_name, 'Not allocated by tcmalloc', | |
72 counted_unknown_objects, 'objects') | |
73 | |
74 | |
75 if __name__ == '__main__': | |
76 pyauto_functional.Main() | |
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