Many of the world’s leading supercomputer architectures are a hybrid of shared memory and network-distributed memory. Such an architecture lends itself to a hybrid MPI-thread programming model. We first present an implementation of inter-thread message passing based on the MPI and pthread libraries. In addition, we present an efficient implementation of termination detection for communication r...

The Message Passing Interface, MPI, is the standard programming model for high performance computing clusters. However, debugging applications on large scale clusters is difficult. The widely used Message Queue Dumping interface enables inspection of message queue state but there is no general interface for extracting information from MPI objects such as communicators. A developer can debug the...

MPI (Message Passing Interface) is a specification for a standard library for message passing that was defined by the MPI Forum, a broadly based group of parallel computer vendors, library writers, and applications specialists. Multiple implementations of MPI have been developed. In this paper, we describe MPICH, unique among existing implementations in its design goal of combining portability ...

The Message Passing Interface MPI has been extremely successful as a portable way to program high performance parallel com puters This success has occurred in spite of the view of many that mes sage passing is di cult and that other approaches including automatic parallelization and directive based parallelism are easier to use This paper argues that MPI has succeeded because it addresses all o...

MPI (Message Passing Interface) is a speciication for a standard library for message passing that was deened by the MPI Forum, a broadly based group of parallel computer vendors, library writers, and applications specialists. Multiple implementations of MPI have been developed. In this paper, we describe MPICH, unique among existing implementations in its design goal of combining portability wi...

Message Passing Interface (MPI) is an attempt to standardize the communication library for distributed-memory computing systems. Since the release of the recent MPI speciication, several MPI implementations have been made publicly available. Different implementations employ diierent approaches, and thus, the performance of each implementation may vary. Since the performance of communication is ...

In this paper, issues related to implementing an MPI version of the fast Givens rotations problem are investigated. We have chosen this algorithm because it has the feature of having no predictable communication pattern. Message Passing Interface (MPI) is an attempt to standardise the communication library for distributed memory computing systems. The message-passing paradigm is attractive beca...

MPI (Message Passing Interface) is a speciication for a standard library for message passing that was deened by the MPI Forum, a broadly based group of parallel computer vendors, library writers, and applications specialists. Multiple implementations of MPI have been developed. In this paper, we describe MPICH, unique among existing implementations in its design goal of combining portability wi...

MPI (Message Passing Interface) is a speciication for a standard library for message passing that was deened by the MPI Forum, a broadly based group of parallel computer vendors, library writers, and applications specialists. Multiple implementations of MPI have been developed. In this paper, we describe MPICH, unique among existing implementations in its design goal of combining portability wi...