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. Pe�a" 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: [email protected] [[email protected]] on behalf of "Antonio J. Pe�a" [[email protected]] Sent: Monday, April 28, 2014 6:26 PM To: [email protected] 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 [email protected] To manage subscription options or unsubscribe: https://lists.mpich.org/mailman/listinfo/discuss

-- Antonio J. Pe�a Postdoctoral Appointee Mathematics and Computer Science Division Argonne National Laboratory 9700 South Cass Avenue, Bldg. 240, Of. 3148 Argonne, IL 60439-4847 [email protected] www.mcs.anl.gov/~apenya

_______________________________________________ discuss mailing list [email protected] To manage subscription options or unsubscribe: https://lists.mpich.org/mailman/listinfo/discuss _______________________________________________ discuss mailing list [email protected] To manage subscription options or unsubscribe: https://lists.mpich.org/mailman/listinfo/discuss

-- Antonio J. Pe�a Postdoctoral Appointee Mathematics and Computer Science Division Argonne National Laboratory 9700 South Cass Avenue, Bldg. 240, Of. 3148 Argonne, IL 60439-4847 [email protected] www.mcs.anl.gov/~apenya