Hi George. So is it dangerous to use hybrid program ( MPI+OpenMP) without enable threads support?
2008/9/29 George Bosilca <bosi...@eecs.utk.edu> > Gabriele, > > The thread support has to be explicitly requested at build time, or it will > be disabled. Add --enable-mpi-threads (configure --help will give you more > info) to your configure. If you plan to use threads with Open MPI I strongly > suggest to update to the 1.3. This version is not yet released, but you can > download the source from the nightly build section. > > george. > > > > On Sep 29, 2008, at 9:58 AM, Gabriele Fatigati wrote: > > Another question about MPI_INIT_THREAD. >> >> At the moment, as said, my OpenMPi version supports only level 0: >> MPI_THREAD_SINGLE. Suppose that i have this code: >> >> #pragma omp barrier >> #pragma omp master >> MPI_Send(buf,...); >> #pragma omp barrier >> >> Due my OpenMPI configuration, is it dangerous use this type of code? What >> does it means that OpenMPI doesn't support all thread levels of >> MPI_INIT_THREAD? >> >> >> 2008/9/29 Gabriele Fatigati <g.fatig...@cineca.it> >> Dear OpenMPi developers, >> i've noted that OpenMPI 1.25 and 1.2.6 version doesn't supports thread >> initialization function shows below: >> >> int MPI_Init_thread(int *argc, char *((*argv)[]), int required, int >> *provided) >> >> used in hybrid programming MPI+OpenMP. Returned vales provided is 0, so >> the unique thread level supported is MPI_THREAD_SINGLE. >> >> Whitch is the newest OpenMPI version that has full support for >> MPI_THREAD_SINGLE, MPI_THREAD_FUNNELED, MPI_THREAD_SERIALIZED and >> MPI_THREAD_MULTIPLE? >> >> Thanks in advance. >> >> -- >> Ing. Gabriele Fatigati >> >> CINECA Systems & Tecnologies Department >> >> Supercomputing Group >> >> Via Magnanelli 6/3, Casalecchio di Reno (BO) Italy >> >> www.cineca.it Tel: +39 051 6171722 >> >> g.fatig...@cineca.it >> >> >> >> -- >> Ing. Gabriele Fatigati >> >> CINECA Systems & Tecnologies Department >> >> Supercomputing Group >> >> Via Magnanelli 6/3, Casalecchio di Reno (BO) Italy >> >> www.cineca.it Tel: +39 051 6171722 >> >> g.fatig...@cineca.it >> _______________________________________________ >> users mailing list >> us...@open-mpi.org >> http://www.open-mpi.org/mailman/listinfo.cgi/users >> > > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users > > -- Ing. Gabriele Fatigati CINECA Systems & Tecnologies Department Supercomputing Group Via Magnanelli 6/3, Casalecchio di Reno (BO) Italy www.cineca.it Tel: +39 051 6171722 g.fatig...@cineca.it
