OpenMP is an implementation program interface that might be utilized to explicitly immediate multi-threaded and it shared memory parallelism. OpenMP platform for specifications multi-processing via concurrent work between interested parties of hardware and software industry, governments and academia. OpenMP is not needs implemented identically by all vendors and it is not proposed for distribut...

Cluster systems interconnected via fast interconnection networks have been successfully applied to various research fields for parallel execution of large applications. Next to MPI, the conventional programming model, OpenMP is increasingly used for parallelizing sequential codes. Due to its easy programming interface and similar semantics with traditional programming languages, OpenMP is espec...

Modern multicore architectures have become popular because of the limitations of deep pipelines and heating and power concerns. Some of these multicore architectures such as the Intel Xeon have the ability to run several threads on a single core. The OpenMP standard for compiler directive based shared memory programming allows the developer an easy path to writing multithreaded programs and is ...

OpenMP was recently proposed by a group of vendors as a programming model for shared memory parallel architectures. The growing popularity of such systems, and the rapid availability of productstrength compilers for OpenMP, seem to guarantee a broad take-up of this paradigm if appropriate tools for application development can be provided. POST is an EU-funded project that is developing a produc...

High performance computers are analysed using simple MPI, OpenMP and mixed mode Game of Life codes. Direct comparison between the HPC 3500 and HPC 6500 is used to approximate the operating system overhead present, and it is found that operating system uses up to 5% of the machine’s processing power. Vast performance increases are discovered when using OpenMP on the HPC 6500, which are due to ca...

This white paper describes parallelization of the Slilab code with OpenMP for a shared-memory execution model when focusing on the multiphase phase flow simulations, such as fiber suspensions in turbulent channel flows. In such problems the motion of the ”second phase fibre” is frequently crossed over the distributed domain boundary of the ”first phase fluid”, which in turn reduces the work-bal...

In this paper, we examine some of the challenges present in providing support for OpenMP applications on a Software Distributed Shared Memory(DSM) based cluster system. We present detailed measurements of the performance characteristics of realistic OpenMP applications from the SPEC OMP2001 benchmarks. Based on these measurements, we discuss application and system characteristics that impede th...