2009 IEEE International Conference on Cluster Computing and Workshops (2009)
New Orleans, LA USA
Aug. 31, 2009 to Sept. 4, 2009
Francois Trahay , University Bordeaux 1/LaBRI, 351 cours de la Liberation F-33405 Talence, France
Alexandre Denis , INRIA Bordeaux - Sud-Ouest/LaBRI, 351 cours de la Liberation F-33405 Talence, France
Since the advent of multi-core processors, the phys-ionomy of typical clusters has dramatically evolved. This new massively multi-core era is a major change in architecture, causing the evolution of programming models towards hybrid MPI+threads, therefore requiring new features at low-level. Modern communication subsystems now have to deal with multithreading: the impact of thread-safety, the contention on network interfaces or the consequence of data locality on performance have to be studied carefully. In this paper, we present PIOMan, a scalable and generic lightweight task scheduling system for communication libraries. It is designed to ensure concurrent progression of multiple tasks of a communication library (polling, offload, multi-rail) through the use of multiple cores, while preserving locality to avoid contention and allow a scalability to a large number of cores and threads. We have implemented the model, evaluated its performance, and compared it to state of the art solutions regarding overhead, scalability, and communication and computation overlap.
processor scheduling, multiprocessing systems, multi-threading
F. Trahay and A. Denis, "A scalable and generic task scheduling system for communication libraries," 2009 IEEE International Conference on Cluster Computing and Workshops(CLUSTER), New Orleans, LA USA, , pp. 1-8.