#4110: [with patch, needs review] Memory leak in saving matrices
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Reporter: rlm | Owner: mabshoff
Type: defect | Status: assigned
Priority: major | Milestone: sage-3.1.3
Component: memleak | Resolution:
Keywords: |
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Changes (by mabshoff):
* status: new => assigned
* summary: Memory leak in saving matrices => [with patch, needs review]
Memory leak in saving matrices
Comment:
Before:
{{{
==27766== LEAK SUMMARY:
==27766== definitely lost: 73,004,158 bytes in 10,007 blocks.
==27766== indirectly lost: 5,586,420 bytes in 209,482 blocks.
==27766== possibly lost: 402,505 bytes in 1,011 blocks.
==27766== still reachable: 36,106,357 bytes in 217,055 blocks.
==27766== suppressed: 305,691 bytes in 4,843 blocks.
}}}
Specifically:
{{{
==27766== 78,589,900 (73,003,480 direct, 5,586,420 indirect) bytes in
9,995 blocks are definitely lost in loss record 13,758 of 13,758
==27766== at 0x4A1BDEB: malloc (vg_replace_malloc.c:207)
==27766== by 0x16A44C5E: gdMalloc (gdhelpers.c:85)
==27766== by 0x16A2E130: gdImageCreate (gd.c:83)
==27766== by 0x166C828B:
__pyx_pf_4sage_6matrix_17matrix_mod2_dense_17Matrix_mod2_dense___reduce__
(matrix_mod2_dense.c:6925)
==27766== by 0x415832: PyObject_Call (abstract.c:1861)
==27766== by 0x47D750: PyEval_CallObjectWithKeywords (ceval.c:3442)
==27766== by 0x458C0F: object_reduce_ex (typeobject.c:2867)
==27766== by 0x415832: PyObject_Call (abstract.c:1861)
==27766== by 0x7D86723: save (cPickle.c:2498)
==27766== by 0x7D87ECC: batch_list (cPickle.c:1561)
==27766== by 0x7D86C5B: save (cPickle.c:1629)
==27766== by 0x7D88587: cpm_dumps (cPickle.c:2580)
}}}
After:
{{{
==29605== LEAK SUMMARY:
==29605== definitely lost: 678 bytes in 12 blocks.
==29605== possibly lost: 369,938 bytes in 975 blocks.
==29605== still reachable: 36,091,754 bytes in 216,569 blocks.
==29605== suppressed: 305,691 bytes in 4,843 blocks.
}}}
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/4110#comment:3>
SAGE <http://sagemath.org/>
Sage - Open Source Mathematical Software: Building the Car Instead of
Reinventing the Wheel
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