[mpich-discuss] Memory leak comparing communicators

[VandeVondele Joost]

Hi Antonio,

right now, a runnable example is or full CP2K program, freely available at cp2k.org, but not very practical as a testcase.

It seems to happen at any point where we call:

CALL mpi_comm_compare ( comm1, comm2, iout, ierr )

I'll see if I can reproduce it running something from the test directory.

Joost

________________________________________
From: discuss-bounces at mpich.org [discuss-bounces at mpich.org] on behalf of "Antonio J. Peña" [apenya at mcs.anl.gov]
Sent: Monday, April 28, 2014 6:26 PM
To: discuss at mpich.org
Subject: Re: [mpich-discuss] Memory leak comparing communicators

Hi Joost,

Can you share the smallest fragment of code with which we can reproduce
this?

   Antonio


On 04/28/2014 11:25 AM, VandeVondele Joost wrote:
> Hi,
>
> using mpich 3.1 I notice that my application leaks memory. Compiling it with '-O1 -g -fno-omit-frame-pointer -fsanitize=leak' using gcc 4.9 it appears the sources is comparing communicators, for example:
>
> [0] Direct leak of 38400 byte(s) in 600 object(s) allocated from:
> [0]     #0 0x7f84298d53a8 in __interceptor_malloc ../../../../gcc/libsanitizer/lsan/lsan_interceptors.cc:66
> [0]     #1 0x7f842aabaf6b in MPIR_Group_create /data/vjoost/mpich-3.1/src/mpi/group/grouputil.c:77
> [0]     #2 0x7f842ab88314 in MPIR_Comm_group_impl /data/vjoost/mpich-3.1/src/mpi/comm/comm_group.c:44
> [0]     #3 0x7f842ab840d3 in PMPI_Comm_compare /data/vjoost/mpich-3.1/src/mpi/comm/comm_compare.c:122
> [0]     #4 0x7f842aac8e84 in pmpi_comm_compare_ /data/vjoost/mpich-3.1/src/binding/f77/comm_comparef.c:267
> [0]     #5 0x1bfd447 in __message_passing_MOD_mp_comm_compare /data/vjoost/clean/cp2k/cp2k/src/common/message_passing.F:1084
>
> I'm not seeing other leaks, so is guess something particular is going on here. Any suggestions on a possible fix ?
>
> Thanks,
>
> Joost
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--
Antonio J. Peña
Postdoctoral Appointee
Mathematics and Computer Science Division
Argonne National Laboratory
9700 South Cass Avenue, Bldg. 240, Of. 3148
Argonne, IL 60439-4847
apenya at mcs.anl.gov
www.mcs.anl.gov/~apenya

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