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. Best regards, Khalid _______________________________________________ discuss mailing list [email protected] To manage subscription options or unsubscribe: https://lists.mpich.org/mailman/listinfo/discuss