Hello - Thank you for the bug report. This has been fixed in the trunk.
Brian On 7/12/12 1:46 AM, "Mikhail Kurnosov" <mkurno...@gmail.com> wrote: >Hello, > >In the case of single process the MPI_Ireduce_scatter_block is >segfaulting with v1.9a1r26786. > >But in other cases (commsize >= 2) processes hang in >MPI_Ireduce_scatter_block. The NBC_Progress hangs during rounds >processing. > >The following example illustrates this problem: > >$ cat ireduce_scatter_block_test.c >#include <stdio.h> >#include <stdlib.h> >#include <mpi.h> > >int main(int argc, char **argv) >{ > MPI_Request req; > MPI_Status status; > double *sbuf, *rbuf; > int commsize, i, j, count = 10; > > MPI_Init(&argc, &argv); > MPI_Comm_size(MPI_COMM_WORLD, &commsize); > > sbuf = malloc(sizeof(*sbuf) * count * commsize); > rbuf = malloc(sizeof(*rbuf) * count); > for (i = 0; i < commsize; i++) { > for (j = 0; j < count; j++) { > sbuf[i] = 1.0; > } > } > > MPI_Ireduce_scatter_block(sbuf, rbuf, count, MPI_DOUBLE, > MPI_SUM, MPI_COMM_WORLD, &req); > MPI_Wait(&req, &status); > > free(rbuf); > free(sbuf); > MPI_Finalize(); > > return 0; >} > >-- >Mikhail Kurnosov >Computer Systems Department >Siberian State University of Telecommunications and Information Sciences >Address: 630102, 86 Kirova str., Novosibirsk, Russia >Email: mkurno...@gmail.com >http://cpct.sibsutis.ru/~mkurnosov >_______________________________________________ >devel mailing list >de...@open-mpi.org >http://www.open-mpi.org/mailman/listinfo.cgi/devel > >