On Jun 14, 2013, at 9:46 AM, Brian Budge <brian.bu...@gmail.com> wrote:
> I'd like to bump this question. I also wanted to ask: I've been > searching the archives, and it seems that in past versions of OMPI, > only MPI_THREAD_SINGLE was available from the default configuration of > OMPI. It seems that as long as calls to MPI were serialized, however, > there were no issues. Is this still the case in 1.6 and 1.7 series? Should still be true, though I confess I haven't tested it. I know some people who use it that way, though, and it seems to work for them. > > Thanks, > Brian > > On Mon, Feb 4, 2013 at 9:09 PM, Roland Schulz <rol...@utk.edu> wrote: >> >> >> >> On Mon, Jan 28, 2013 at 9:20 PM, Brian Budge <brian.bu...@gmail.com> wrote: >>> >>> I believe that yes, you have to compile enable-mpi-thread-multiple to >>> get anything other than SINGLE. >> >> >> I just tested that compiling with enable-opal-multi-threads also makes >> MPI_Init_thread return MPI_THREAD_FUNNELED. >> Does enable-opal-multi-threads have any performance impact? According to >> http://www.open-mpi.org/community/lists/users/2012/10/20587.php >> enable-mpi-thread-multiple has significant performance impact (at least for >> IB). But I couldn't find any description of whether this is also true for >> enable-opal-multi-threads. >> >> Also why is enable-opal-multi-threads required for MPI_THREAD_FUNNELED? This >> was asked before (e.g. >> http://www.open-mpi.org/community/lists/devel/2010/05/7900.php) but I >> couldn't find any answer. What does the option change? The README states: >> "Enables thread lock support in the OPAL and ORTE layers.", but that is not >> very useful for a user. Also why is it not enabled by default? >> >> Roland >> >>> >>> >>> Brian >>> >>> On Tue, Jan 22, 2013 at 12:56 PM, Roland Schulz <rol...@utk.edu> wrote: >>>> Hi, >>>> >>>> compiling 1.6.1 or 1.6.2 without enable-mpi-thread-multiple returns from >>>> MPI_Init_thread as provided level MPI_THREAD_SINGLE. Is >>>> enable-mpi-thread-multiple required even for >>>> MPI_THREAD_FUNNELED/MPI_THREAD_SERIALIZED? >>>> >>>> This question has been asked before: >>>> http://www.open-mpi.org/community/lists/users/2011/05/16451.php but I >>>> couldn't find an answer. >>>> >>>> Roland >>>> >>>> -- >>>> ORNL/UT Center for Molecular Biophysics cmb.ornl.gov >>>> 865-241-1537, ORNL PO BOX 2008 MS6309 >>>> >>>> _______________________________________________ >>>> 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 >>> >>> >>> >>> >> >> >> >> -- >> ORNL/UT Center for Molecular Biophysics cmb.ornl.gov >> 865-241-1537, ORNL PO BOX 2008 MS6309 >> >> _______________________________________________ >> 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
