Re: [OMPI devel] Question about barrier()

2010-11-02 Thread Jeff Squyres
On Nov 2, 2010, at 10:11 AM, wrote: > Yes, I am calling MPI_Init_thread() with MPI_THREAD_MULTIPLE. And I have > enabled thread and mpi_threads while configuring OpenMPI. BTW, I am using > OpenMPI 1.4.2. > > It will be helpful to know if this is a design constraint or some > implementation

Re: [OMPI devel] Question about barrier()

2010-11-02 Thread ananda.mudar
Jeff Yes, I am calling MPI_Init_thread() with MPI_THREAD_MULTIPLE. And I have enabled thread and mpi_threads while configuring OpenMPI. BTW, I am using OpenMPI 1.4.2. It will be helpful to know if this is a design constraint or some implementation defect. Regards Ananda Ananda B Mudar,

Re: [OMPI devel] Question about barrier()

2010-11-02 Thread Jeff Squyres
I'd have to check to be sure, but I'm pretty sure that it's because we've activated lots of locks that aren't there in single-threaded mode. I say this because I *assume* you mean that when you use MPI_INIT_THREAD, you mean that you're actually calling it with MPI_THREAD_MULTIPLE. Calling MPI_