ICL Research Profile



Evolve, a collaborative effort between ICL and the University of Houston, expands the capabilities of Open MPI to support the NSF’s critical software-infrastructure missions. Core challenges include: extending the software to scale to 10,000–100,000 processes; ensuring support for accelerators; enabling highly asynchronous execution of communication and I/O operations, and ensuring resilience. Part of the effort involves careful consideration of modifications to the MPI specification to account for the emerging needs of application developers on future extreme-scale systems.

So far, Evolve efforts have involved exploratory research for improving different performance aspects of the Open MPI library. Notably, this has led to an efficiency improvement in multi-threaded programs using MPI in combination with other thread-based programming models (e.g., OpenMP). A novel collective communication framework with event-based programming and data dependencies was investigated. It demonstrated a clear advantage regarding aggregate bandwidth in heterogeneous (shared memory + network) systems. Support for MPI resilience following the User-Level Failure Mitigation (ULFM) fault-tolerance proposal was released based on the latest Open MPI version and will soon be fully integrated into Open MPI.

In Collaboration With

  1. University of Houston

Sponsored by

  1. National Science Foundation