#12903: Memory leaks with CPLEX
--------------------------------------+-------------------------------------
Reporter: ncohen | Owner: ncohen
Type: defect | Status: needs_work
Priority: major | Milestone: sage-5.1
Component: linear programming | Resolution:
Keywords: | Work issues:
Report Upstream: N/A | Reviewers:
Authors: | Merged in:
Dependencies: | Stopgaps:
--------------------------------------+-------------------------------------
Changes (by dcoudert):
* status: needs_review => needs_work
Comment:
Hello,
the patch is working (install OK, long tests OK, docbuild OK). However, we
still have memory leaks when using try except.
This example without try/except uses constant memory, but with try/except,
memory is constantly increasing.
{{{
def test(G, solver = None, verbose = 0):
from sage.numerical.mip import MixedIntegerLinearProgram,
MIPSolverException, Sum
p = MixedIntegerLinearProgram(solver = solver, maximization = False)
b = p.new_variable(dim=1)
for u,v in G.edge_iterator(labels=False):
p.add_constraint(b[u]+b[v] >= 1)
p.set_objective(Sum([b[u] for u in G]))
p.set_binary(b)
try:
p.solve()
sol = p.get_values(b)
return len([u for u in G if sol[u]==1])
except MIPSolverException:
print "oups"
return 0
def my_test(n,p,sample=1000):
for i in xrange(sample):
g = graphs.RandomGNP(n,p)
res = test(g, solver = "CPLEX", verbose = 0)
print res, get_memory_usage()
}}}
{{{
sage: my_test(100,0.1, sample = 10)
69 388.94140625
68 388.94140625
69 389.0703125
71 389.0703125
68 389.0703125
71 389.0703125
69 389.19921875
69 389.19921875
71 389.19921875
71 389.19921875
}}}
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/12903#comment:2>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
--
You received this message because you are subscribed to the Google Groups
"sage-trac" group.
To post to this group, send email to [email protected].
To unsubscribe from this group, send email to
[email protected].
For more options, visit this group at
http://groups.google.com/group/sage-trac?hl=en.
