Multi-core and Network Aware MPI Topology Functions

Final Report for Enhancing the MPI Programming Model for PetaScale Systems

“…These give the computational scientist a portable way to map an MPI program onto a large parallel machine in a way that provides for efficient (low contention) communication. Some of this work was reported on in [22]. Some related work looked at hot spots in two--level direct networks, such as those for the IBM PERCS system, which was originally to be installed at Illinois.…”

Communication-aware process and thread mapping using online communication detection

“…Other algorithms have been proposed, such as Treematch [35] and Zoltan [36]. We selected Scotch because it has a short execution time (less than 1 ms to map 32 processes) while providing good results [37][38][39]13,40], and is therefore suitable for online mapping. Scotch has a complexity of OðN 3 Þ, where N is the number of processes to be mapped [38].…”

Back-analysis of soil parameters of the Malutang II concrete face rockfill dam using parallel mutation particle swarm optimization

“…The MPI provides a set of interfaces that are designed to assist the library in constructing a virtual topology from the application's communication pattern and in supporting remapping (reordering) of the processes to the available cores to optimize performance [35]. Communication among the cores is achieved by sending and receiving messages among the corresponding processes.…”