Array-level Collective Communications

Collective Communications for HPJava

We discuss implementation of high-level collective communication library, called Adlib, for scalable programming in Java. We are using Adlib as basis of our system, called HPJava. Many functionalities of Java version of high-level communication library is following its predecessor–C++ library developed by in the Parallel Compiler Runtime Consortium (PCRC). However, many design issues are recons...

Collective Communications for Scalable Programming

HPJava is an environment for scientific and parallel programming using Java. It is based on an extended version of the Java language. One feature that HPJava adds to Java is a multi-dimensional array, or multiarray, with properties similar to the arrays of Fortran. We are using Adlib as our high-level collective communication library. Adlib was originally developed using C++ by the Parallel Com...

Array Processing for Mobile Communications

Optimization of Collective Communications in HeteroMPI

HeteroMPI is an extension of MPI designed for high performance computing on heterogeneous networks of computers. The recent new feature of HeteroMPI is the optimized version of collective communications. The optimization is based on a novel performance communication model of switch-based computational clusters. In particular, the model reflects significant non-deterministic and non-linear escal...

Performance Characterisation of Intra-Cluster Collective Communications

Although recent works try to improve collective communication in grid systems by separating intra and intercluster communication, the optimisation of communications focus only on inter-cluster communications.We believe, instead, that the overall performance of the application may be improved if intra-cluster collective communications performance is known in advance. Hence, it is important to ha...