Hmmm...well, it seems to work for me:
$ mpirun -n 4 ./thread_init
Calling MPI_Init_thread...
Calling MPI_Init_thread...
Calling MPI_Init_thread...
Calling MPI_Init_thread...
MPI_Init_thread returned, provided = 3
MPI_Init_thread returned, provided = 3
MPI_Init_thread returned, provided = 3
MPI_Init_thread returned, provided = 3
$
This is with the current 1.7 code branch, so it's possible something has been
updated. You might try it with the next nightly tarball and see if it helps.
BTW: The correct configure option is --enable-mpi-thread-multiple
My test program:
#include <mpi.h>
#include <stdio.h>
int main(int argc, const char* argv[]) {
int provided = -1;
printf("Calling MPI_Init_thread...\n");
MPI_Init_thread(NULL, NULL, MPI_THREAD_MULTIPLE, &provided);
printf("MPI_Init_thread returned, provided = %d\n", provided);
MPI_Finalize();
return 0;
}
On Nov 21, 2013, at 1:36 PM, Dominique Orban <dominique.or...@gmail.com> wrote:
> Hi,
>
> I'm compiling the example code at the bottom of the following page that
> illustrates MPI_Init_Thread():
>
> http://mpi.deino.net/mpi_functions/mpi_init_thread.html
>
> I have OpenMPI 1.7.3 installed on OSX 10.8.5 with --enable-thread-multiple
> compiled with clang-425.0.28. I can reproduce the following on OSX 10.9
> (clang-500) and another user was able to reproduce it on some flavor of Linux:
>
> $ mpicc -g -o testmpi testmpi.c -lmpi
> $ mpirun -n 2 ./testmpi
> $ # hangs forever
>
> I've no knowledge of how to debug MPI programs but it was suggested to me to
> do this:
>
> $ mpirun -n 2 xterm -e gdb ./testmpi
>
> In the first xterm, I say 'run' in gdb, interrupt the program after a while
> and get a backtrace:
>
> ^C
> Program received signal SIGINT, Interrupt.
> 0x00007fff99116322 in select$DARWIN_EXTSN ()
> from /usr/lib/system/libsystem_kernel.dylib
> (gdb) where
> #0 0x00007fff99116322 in select$DARWIN_EXTSN ()
> from /usr/lib/system/libsystem_kernel.dylib
> #1 0x00000001001963c2 in select_dispatch ()
> from /usr/local/Cellar/open-mpi/1.7.3/lib/libopen-pal.6.dylib
> #2 0x000000010018f178 in opal_libevent2021_event_base_loop ()
> from /usr/local/Cellar/open-mpi/1.7.3/lib/libopen-pal.6.dylib
> #3 0x000000010015f059 in opal_progress ()
> from /usr/local/Cellar/open-mpi/1.7.3/lib/libopen-pal.6.dylib
> #4 0x0000000100019321 in ompi_mpi_init () from
> /usr/local/lib/libmpi.1.dylib
> #5 0x00000001000334da in MPI_Init_thread () from
> /usr/local/lib/libmpi.1.dylib
> #6 0x0000000100000ddb in main (argc=1, argv=0x7fff5fbfedc0) at
> testmpi.c:9
> (gdb) backtrace
> #0 0x00007fff99116322 in select$DARWIN_EXTSN ()
> from /usr/lib/system/libsystem_kernel.dylib
> #1 0x00000001001963c2 in select_dispatch ()
> from /usr/local/Cellar/open-mpi/1.7.3/lib/libopen-pal.6.dylib
> #2 0x000000010018f178 in opal_libevent2021_event_base_loop ()
> from /usr/local/Cellar/open-mpi/1.7.3/lib/libopen-pal.6.dylib
> #3 0x000000010015f059 in opal_progress ()
> from /usr/local/Cellar/open-mpi/1.7.3/lib/libopen-pal.6.dylib
> #4 0x0000000100019321 in ompi_mpi_init () from
> /usr/local/lib/libmpi.1.dylib
> #5 0x00000001000334da in MPI_Init_thread () from
> /usr/local/lib/libmpi.1.dylib
> #6 0x0000000100000ddb in main (argc=1, argv=0x7fff5fbfedc0) at
> testmpi.c:9
> (gdb)
>
> In the second xterm window:
>
> ^C
> Program received signal SIGINT, Interrupt.
> 0x00000001002e9a28 in mca_common_sm_init ()
> from /usr/local/Cellar/open-mpi/1.7.3/lib/libmca_common_sm.4.dylib
> (gdb) where
> #0 0x00000001002e9a28 in mca_common_sm_init ()
> from /usr/local/Cellar/open-mpi/1.7.3/lib/libmca_common_sm.4.dylib
> #1 0x00000001002e5a38 in mca_mpool_sm_init ()
> from /usr/local/Cellar/open-mpi/1.7.3/lib/openmpi/mca_mpool_sm.so
> #2 0x00000001000793fa in mca_mpool_base_module_create ()
> from /usr/local/lib/libmpi.1.dylib
> #3 0x000000010053fb41 in mca_btl_sm_add_procs ()
> from /usr/local/Cellar/open-mpi/1.7.3/lib/openmpi/mca_btl_sm.so
> #4 0x0000000100535dfb in mca_bml_r2_add_procs ()
> from /usr/local/Cellar/open-mpi/1.7.3/lib/openmpi/mca_bml_r2.so
> #5 0x000000010051e59c in mca_pml_ob1_add_procs ()
> from /usr/local/Cellar/open-mpi/1.7.3/lib/openmpi/mca_pml_ob1.so
> #6 0x000000010001959b in ompi_mpi_init () from
> /usr/local/lib/libmpi.1.dylib
> #7 0x00000001000334da in MPI_Init_thread () from
> /usr/local/lib/libmpi.1.dylib
> #8 0x0000000100000ddb in main (argc=1, argv=0x7fff5fbfedc0) at
> testmpi.c:9
> (gdb)
>
>
> The output of `ompi_info --parsable` is here: https://gist.github.com/7590040
>
> Thanks in advance.
>
> Dominique
>
>
>
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