Integrating software distributed shared memory and message passing programming

Abstract—Software Distributed Shared Memory (SDSM) systems provide programmers with a shared memory programming environment across distributed memory architectures. In contrast to the message passing programming environment, the SDSM can resolve data dependencies within the application without the programmer having to explicitly specify communication. However, this service is provided at a cost to performance. Thus it makes sense to use message passing directly when data dependencies are easy to solve using message passing. For example, it is not complicated to specify data transfer for large contiguous regions of memory. This paper outlines how the Danui SDSM library has been extended to include support for message passing. Four different message passing transfers are identified depending on whether the data being sent/received resides in private or globally shared buffers. Transfers between globally shared buffers are further categorized as symmetrical or asymmetrical depending on...

• Type: Conference
• Year: 2009
• Where: CLUSTER
• Authors: H'sien J. Wong, Alistair P. Rendell
• Keywords: CLUSTER 2009, Cluster Computing, Message Passing, Message Passing Programming, Shared Memory