The documents distributed by this server have been provided by the contributing authors as a means to ensure timely dissemination of scholarly and technical work on a noncommercial basis. Copyright and all rights therein are maintained by the authors or by other copyright holders, notwithstanding that they have offered their works here electronically. It is understood that all persons copying this information will adhere to the terms and constraints invoked by each author's copyright. These works may not be reposted without the explicit permission of the copyright holder.
Publications of SPCL
|C. Kaiser, T. Hoefler, B. Bierbaum and T. Bemmerl:|
|Implementation and Analysis of Nonblocking Collective Operations on SCI Networks|
(. Vol , Nr. , In Proceedings of the 23rd IEEE International Parallel & Distributed Processing Symposium, CAC'09 Workshop, presented in Rome, Italy, pages , , ISSN: 1530-2075, ISBN: 978-1-4244-3750-4, May 2009)
AbstractNonblocking collective communication operations are currently being considered for inclusion into the MPI standard and are an area of active research. The benefits of such operations are documented by several recent publications, but so far, research concentrates on InfiniBand clusters. This paper describes an implementation of nonblocking collectives for clusters with the Scalable Coherent Interface (SCI) interconnect. We use synthetic and application kernel benchmarks to show that with nonblocking functions for collective communication performance enhancements can be achieved on SCI systems. Our results indicate that for the implementation of these nonblocking collectives data transfer methods other than those usually used for the blocking version should be considered to realize such improvements.