On 27 October 2016 at 18:35, MM <finjulh...@gmail.com> wrote: > Hello, > > Given mpi nodes 0 .... N-1, 0 being root, master node. > and trying to determine the maximum value of a function over a large > range of values of its parameters, > > What are the differences between, if any: > > 1. At node i: > evaluate f for each of the values assigned to i of the parameters space. > calculate maximum of f > send this max back to root node, and calculate max of maxes. > > 2. Assuming all nodes handle the same number of values of the parameters of f: > evaluate f for each.... > reduce the array of f results back to root node using the MAX OP for e.g. > at root node, calculate the max of maxes > > feels like doing rows then columns vs columns then rows in a matrix. > > Basically, what aspects can help me choose? > > Performance is always factor 1. If same performance, then code > simplicity comes second > > thanks,
How can I decide between option 1 and option 2? Rds, _______________________________________________ users mailing list users@lists.open-mpi.org https://rfd.newmexicoconsortium.org/mailman/listinfo/users
