[mpich-discuss] Memory leak comparing communicators

["Antonio J. Peña"]

Haven't had time yet. It's coming...


On 05/01/2014 09:18 AM, Rob Latham wrote:
>
>
> On 05/01/2014 09:08 AM, "Antonio J. Peña" wrote:
>>
>> Thank you Joost. We'll check this issue. I'll keep you posted.
>
> what's the trac ticket for this issue?
>
> ==rob
>
>>
>>
>> On 05/01/2014 09:02 AM, VandeVondele Joost wrote:
>>> Hi Antonio,
>>>
>>> I finally reproduced this in a small program. The culprit actually
>>> seems to be MPI_Group_translate_ranks, but the leak shows up with a
>>> trace to MPI_Comm_compare:
>>>
>>> Direct leak of 3072 byte(s) in 96 object(s) allocated from:
>>>      #0 0x7fdab2e213a8 in __interceptor_malloc
>>> ../../../../gcc/libsanitizer/lsan/lsan_interceptors.cc:66
>>>      #1 0x7fdab3efaf6b in MPIR_Group_create
>>> /data/vjoost/mpich-3.1/src/mpi/group/grouputil.c:77
>>>      #2 0x7fdab3fc8314 in MPIR_Comm_group_impl
>>> /data/vjoost/mpich-3.1/src/mpi/comm/comm_group.c:44
>>>      #3 0x7fdab3fc40d3 in PMPI_Comm_compare
>>> /data/vjoost/mpich-3.1/src/mpi/comm/comm_compare.c:122
>>>      #4 0x4009de in main /data/vjoost/mpich-3.1/debug/2d.c:23
>>>
>>>> cat 2d.c
>>> #include <stdio.h>
>>> #include <mpi.h>
>>>
>>> main(int argc, char **argv)  // needs 2 ranks //
>>> {
>>>     MPI_Comm comm_cart, dup_comm_world;
>>>     int result,reorder;
>>>     int dim[2], period[2], rin[2], rout[2];
>>>     int i,j,k;
>>>     int g1,g2;
>>>
>>>     MPI_Init (&argc, &argv);
>>>
>>>     for(i=0;i<100;i++)
>>>     {
>>>
>>>        MPI_Comm_dup( MPI_COMM_WORLD, &dup_comm_world);
>>>        dim[0]=2; dim[1]=1;
>>>        reorder=0;
>>>        period[0]=1; period[1]=1;
>>>        rin[0]=0; rin[1]=1;
>>>        MPI_Cart_create(dup_comm_world, 2, dim, period, reorder,
>>> &comm_cart);
>>>        MPI_Comm_compare(dup_comm_world, comm_cart, &result );
>>>        MPI_Comm_group(dup_comm_world,&g1);
>>>        MPI_Comm_group(comm_cart,&g2);
>>>        MPI_Group_translate_ranks(g1, 2, rin, g2, rout);
>>>        MPI_Comm_free(&comm_cart);
>>>        MPI_Comm_free(&dup_comm_world);
>>>
>>>     }
>>>
>>>     MPI_Finalize();
>>>
>>> }
>>>
>>> Thanks,
>>>
>>> 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
>>>> _______________________________________________
>>>> discuss mailing list     discuss at mpich.org
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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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>>
>>
>


-- 
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