Section: New Results

High-Performance Point-to-Point Communications

Participants : Alexandre Denis, Sébastien Barascou, Raymond Namyst.

• NewMadeleine is our communication library designed for high performance networks in clusters. We have worked on optimizations on low-level protocols so as to improve point-to-point performance.

• We have proposed a communication protocol [21] for InfiniBand that amortizes the cost of checksums as used by fault-tolerant MPI implementations. We have modeled the behavior of the network and proposed auto-tuning mechanisms to adapt the protocol to the hardware properties.

• This work was initiated in the context of the FP3C collaboration with the University of Tokyo.