#12905: Memory leaks with Cliquer
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Reporter: ncohen | Owner: jason, ncohen, rlm
Type: defect | Status: needs_review
Priority: major | Milestone: sage-5.1
Component: graph theory | Resolution:
Keywords: | Work issues:
Report Upstream: N/A | Reviewers:
Authors: | Merged in:
Dependencies: | Stopgaps:
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Description changed by ncohen:
Old description:
> Geoff reported on http://ask.sagemath.org/question/1170/memory-blowup-
> with-milp memory leaks in Sage. Turns out there were two to solve, and
> one of them was fixed in #12903.
> The other one comes from Cliquer and is solved with this patch. Here's
> what it does :
>
> * Solves memory leaks reported by Geoff
> * Incidentally updates Cliquer to version 1.21
> * Incidentally removes Sage's code that was formerly directly inserted
> in the original Cliquer files. This code is now inserted during the SPKG
> installation from patches located in the SPKG's patches/ folder.
>
> As a result, no one should be scared anymore of running the following
> lines :
>
> for i in range(2000):
> print get_memory_usage()
> _ = graphs.RandomGNP(30,.2).cliques_maximum()
>
> for i in range(2000):
> print get_memory_usage()
> _ = graphs.RandomGNP(30,.2).clique_number()
>
> for i in range(2000):
> print get_memory_usage()
> _ = graphs.RandomGNP(30,.2).clique_maximum()
>
> Apply:
> * [attachment:trac_12905.patch]
>
> Install the new version of Cliquer:
> * http://www.steinertriples.fr/ncohen/cliquer-1.21.p11.spkg
New description:
Geoff reported on http://ask.sagemath.org/question/1170/memory-blowup-
with-milp memory leaks in Sage. Turns out there were two to solve, and one
of them was fixed in #12903.
The other one comes from Cliquer and is solved with this patch. Here's
what it does :
* Solves memory leaks reported by Geoff
* Incidentally updates Cliquer to version 1.21
* Incidentally removes Sage's code that was formerly directly inserted in
the original Cliquer files. This code is now inserted during the SPKG
installation from patches located in the SPKG's patches/ folder.
As a result, no one should be scared anymore of running the following
lines :
{{{
for i in range(2000):
print get_memory_usage()
_ = graphs.RandomGNP(30,.2).cliques_maximum()
}}}
{{{
for i in range(2000):
print get_memory_usage()
_ = graphs.RandomGNP(30,.2).clique_number()
}}}
{{{
for i in range(2000):
print get_memory_usage()
_ = graphs.RandomGNP(30,.2).clique_maximum()
}}}
Apply:
* [attachment:trac_12905.patch]
Install the new version of Cliquer:
* http://www.steinertriples.fr/ncohen/cliquer-1.21.p11.spkg
--
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/12905#comment:2>
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