[OMPI users] MPI cartesian grid : cumulate a scalar value through the procs of a given axis of the grid

2018-05-02 Thread Pierre Gubernatis
Hello all... I am using a *cartesian grid* of processors which represents a spatial domain (a cubic geometrical domain split into several smaller cubes...), and I have communicators to address the procs, as for example a comm along each of the 3 axes I,J,K, or along a plane IK,JK,IJ, etc..). *I n

Re: [OMPI users] MPI cartesian grid : cumulate a scalar value through the procs of a given axis of the grid

2018-05-14 Thread Pierre Gubernatis
ect=1#comment87286983_50130688 Thanks again. 2018-05-02 13:56 GMT+02:00 Peter Kjellström : > On Wed, 2 May 2018 11:15:09 +0200 > Pierre Gubernatis wrote: > > > Hello all... > > > > I am using a *cartesian grid* of processors which represents a spatial > > do

Re: [OMPI users] MPI cartesian grid : cumulate a scalar value through the procs of a given axis of the grid

2018-05-17 Thread Pierre Gubernatis
> MPI_Scan inplementation it is O(log n) compared to O(n) in time. > > > > On May 14, 2018, at 8:42 AM, Pierre Gubernatis < > pierre.guberna...@gmail.com> wrote: > > Thank you to all of you for your answers (I was off up to now). > > Actually my question was't well pose