Hello,
First of all, I am not sure if this group is the right place for this question. If not I apologize for asking unrelated question.
I read two papers about optimizing MPI collective communications on BG/L and BG/P.
(Optimization of MPI Collective Communication on BlueGene/L Systems
and MPI Collective Communications on The Blue Gene/P Supercomputer: Algorithms and Optimizations respectively). However, these two papers do not mention anything about MPI scatter and gather operations, I wonder if these two collective operations have been optimized for BlueGene or they use exactly the same algorithms from MPICH. Any reference appreciated.