MPI_THREAD_MULTIPLE support in the 1.2 series is unfortunately pretty
broken/non-existent.
The v1.3 series has MPI point-to-point support for several networks
with MPI_THREAD_MULTIPLE; check the README file.
On Jan 26, 2009, at 9:21 AM, Ali Copey wrote:
Hi,
I'm trying to get multiple thread running, and have openMPI 1.2.8
compiled with threading enabled:
xxx@xxx:/usr/lib$ ompi_info | grep Thread
Thread support: posix (mpi: yes, progress: no)
however, when I attempt to get MPI_THREAD_MULTIPLE, ...FUNNELED
or ...SERIALIZED I am returned MPI_THREAD_SINGLE (code fragment
follows):
int provided = MPI::Init_thread(MPI_THREAD_MULTIPLE);
switch(provided)
{
case MPI_THREAD_SINGLE: cout << "MPI_THREAD_SINGLE"; break;
case MPI_THREAD_FUNNELED: cout << "MPI_THREAD_FUNNELED"; break;
case MPI_THREAD_SERIALIZED: cout << "MPI_THREAD_SERIALIZED";
break;
case MPI_THREAD_MULTIPLE: cout << "MPI_THREAD_MULTIPLE"; break;
}
Am I missing a compiler flag somewhere?
System:
Linux xxx 2.6.26-1-amd64 #1 SMP Thu Oct 9 14:16:53 UTC 2008 x86_64
GNU/Linux
Thanks for any help,
Alex
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Jeff Squyres
Cisco Systems
