Nick Coghlan added the comment:
I did a bit of poking around with tracemalloc (debugging patch diff attached)
encodings._cache is definitely one culprit, but something else is going on
where it appears the *test cases* are being kept alive.
For comparison, with my hacked regrtest, I get this for test_cmd_line:
$ ./python -m test -R 3:1 test_grammar
[1/1] test_grammar
beginning 4 repetitions
1234
....[ Top 20 differences ]
/home/ncoghlan/devel/py34/Lib/_weakrefset.py:37: size=9936 B (+9936 B),
count=54 (+54), average=184 B
/home/ncoghlan/devel/py34/Lib/_weakrefset.py:38: size=6696 B (+6696 B),
count=54 (+54), average=124 B
/home/ncoghlan/devel/py34/Lib/_weakrefset.py:48: size=6480 B (+6480 B),
count=27 (+27), average=240 B
/home/ncoghlan/devel/py34/Lib/mimetypes.py:487: size=6176 B (+6176 B), count=1
(+1), average=6176 B
/home/ncoghlan/devel/py34/Lib/ctypes/__init__.py:272: size=2362 B (+2362 B),
count=12 (+12), average=197 B
/home/ncoghlan/devel/py34/Lib/ctypes/__init__.py:99: size=2167 B (+2167 B),
count=11 (+11), average=197 B
/home/ncoghlan/devel/py34/Lib/ctypes/__init__.py:274: size=2137 B (+2137 B),
count=11 (+11), average=194 B
/home/ncoghlan/devel/py34/Lib/_weakrefset.py:92: size=1944 B (+1944 B),
count=27 (+27), average=72 B
/home/ncoghlan/devel/py34/Lib/test/regrtest.py:1466: size=1568 B (+1568 B),
count=1 (+1), average=1568 B
/home/ncoghlan/devel/py34/Lib/_weakrefset.py:84: size=1344 B (+1344 B),
count=14 (+14), average=96 B
/home/ncoghlan/devel/py34/Lib/contextlib.py:38: size=656 B (+656 B), count=1
(+1), average=656 B
/home/ncoghlan/devel/py34/Lib/unittest/suite.py:87: size=512 B (+512 B),
count=1 (+1), average=512 B
/home/ncoghlan/devel/py34/Lib/test/support/__init__.py:1735: size=488 B (+488
B), count=1 (+1), average=488 B
/home/ncoghlan/devel/py34/Lib/mimetypes.py:534: size=416 B (+416 B), count=1
(+1), average=416 B
/home/ncoghlan/devel/py34/Lib/mimetypes.py:384: size=416 B (+416 B), count=1
(+1), average=416 B
/home/ncoghlan/devel/py34/Lib/test/regrtest.py:1475: size=224 B (+224 B),
count=1 (+1), average=224 B
/home/ncoghlan/devel/py34/Lib/test/regrtest.py:1464: size=224 B (+224 B),
count=1 (+1), average=224 B
/home/ncoghlan/devel/py34/Lib/mimetypes.py:387: size=224 B (+224 B), count=1
(+1), average=224 B
/home/ncoghlan/devel/py34/Lib/linecache.py:31: size=224 B (+224 B), count=1
(+1), average=224 B
/home/ncoghlan/devel/py34/Lib/ctypes/__init__.py:103: size=224 B (+224 B),
count=1 (+1), average=224 B
test_grammar leaked [-3] references, sum=-3
1 test failed:
test_grammar
While for test_codecs I get this:
$ ./python -m test -R 3:1 test_codecs
[1/1] test_codecs
beginning 4 repetitions
1234
....[ Top 20 differences ]
/home/ncoghlan/devel/py34/Lib/unittest/case.py:408: size=83.7 KiB (+83.7 KiB),
count=206 (+206), average=416 B
/home/ncoghlan/devel/py34/Lib/unittest/case.py:368: size=41.8 KiB (+41.8 KiB),
count=411 (+411), average=104 B
/home/ncoghlan/devel/py34/Lib/unittest/case.py:387: size=16.1 KiB (+16.1 KiB),
count=206 (+206), average=80 B
/home/ncoghlan/devel/py34/Lib/unittest/suite.py:60: size=14.5 KiB (+14.5 KiB),
count=206 (+206), average=72 B
/home/ncoghlan/devel/py34/Lib/unittest/case.py:381: size=13.6 KiB (+13.6 KiB),
count=174 (+174), average=80 B
/home/ncoghlan/devel/py34/Lib/test/test_codecs.py:2653: size=12.2 KiB (+12.2
KiB), count=2 (+2), average=6242 B
/home/ncoghlan/devel/py34/Lib/test/regrtest.py:1475: size=12.0 KiB (+12.0 KiB),
count=1 (+1), average=12.0 KiB
/home/ncoghlan/devel/py34/Lib/_weakrefset.py:37: size=9936 B (+9936 B),
count=54 (+54), average=184 B
/home/ncoghlan/devel/py34/Lib/unittest/loader.py:156: size=7600 B (+7600 B),
count=95 (+95), average=80 B
/home/ncoghlan/devel/py34/Lib/_weakrefset.py:38: size=6696 B (+6696 B),
count=54 (+54), average=124 B
/home/ncoghlan/devel/py34/Lib/_weakrefset.py:48: size=6480 B (+6480 B),
count=27 (+27), average=240 B
/home/ncoghlan/devel/py34/Lib/mimetypes.py:487: size=6176 B (+6176 B), count=1
(+1), average=6176 B
/home/ncoghlan/devel/py34/Lib/unittest/case.py:625: size=3232 B (+3232 B),
count=4 (+4), average=808 B
/home/ncoghlan/devel/py34/Lib/test/test_codecs.py:2637: size=2964 B (+2964 B),
count=6 (+6), average=494 B
/home/ncoghlan/devel/py34/Lib/test/support/__init__.py:1739: size=2432 B (+2432
B), count=32 (+32), average=76 B
/home/ncoghlan/devel/py34/Lib/ctypes/__init__.py:272: size=2362 B (+2362 B),
count=12 (+12), average=197 B
/home/ncoghlan/devel/py34/Lib/unittest/loader.py:70: size=2304 B (+2304 B),
count=32 (+32), average=72 B
/home/ncoghlan/devel/py34/Lib/unittest/suite.py:125: size=2168 B (+2168 B),
count=7 (+7), average=310 B
/home/ncoghlan/devel/py34/Lib/ctypes/__init__.py:274: size=2137 B (+2137 B),
count=11 (+11), average=194 B
/home/ncoghlan/devel/py34/Lib/ctypes/__init__.py:99: size=2071 B (+2071 B),
count=10 (+10), average=207 B
test_codecs leaked [5602] references, sum=5602
test_codecs leaked [1056] memory blocks, sum=1056
1 test failed:
test_codecs
----------
assignee: -> ncoghlan
keywords: +patch
nosy: +haypo
Added file:
http://bugs.python.org/file36362/issue22166_debugging_codec_test_leak.diff
_______________________________________
Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue22166>
_______________________________________
_______________________________________________
Python-bugs-list mailing list
Unsubscribe:
https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
