The NumaConnect cluster excels at both OpenMP and MPI computing within the same shared memory environment. No extra software or program modifications are needed to take advantage of the entire system. Results for the NASA Advanced Supercomputing (NAS) Parallel Benchmarks have set a new record for OpenMP core count and problem size. OpenMP results show good scalability, with best results coming ...

This paper presents a parallel implementation of CURE, an efficient hierarchical data clustering algorithm, using the OpenMP programming model. OpenMP provides a means of transparent management of the asymmetry and non–determinism in CURE, while our OpenMP runtime support enables the effective exploitation of the irregular nested loop–level parallelism. Experimental results for various problem ...

Multi–threaded web servers are typically parallelized by hand using the pthreads library. OpenMP has rarely been used to parallelize such kind of applications, although we foresee that it can be a great tool for network servers developers. In this paper we compare how easy is to parallelize the Boa web server using OpenMP, compared to a pthreads parallelization, and the performance achieved. We...

Systems of perturbed 2D Sine-Gordon equations coupled via a cyclic tridiagonal matrix are solved numerically by a second-order centered finite difference scheme. The systems are considered on rectangular domains. First an OpenMP parallel program is realized and very good performance scalability inside one computational node is achieved. The tests on one computational node of the CPU platform in...

OpenMP has been marketed as THE emerging standard for shared memory parallelism (SMP). The rst compiler for OpenMP is now available on the Cray Origin 2000. In this paper we report on some early experiences with this compiler on a (quasi-)application code, an implementation of the NAS, BT benchmark. OpenMP includes, of course, the traditional do-loop parallelization. For programmers familiar wi...

The need for parallel programming models that are simple to use and at the same time e cient for current ant future parallel platforms has led to recent attention to task-based models such as Cilk++, Intel TBB and the task concept in OpenMP version 3.0. The choice of model and implementation can have a major impact on the nal performance and in order to understand some of the trade-o s we have ...

The recent introduction of task dependencies in the OpenMP specification provides new ways of synchronizing tasks. Application programmers can now describe the data a task will read as input and write as output, letting the runtime system resolve fine-grain dependencies between tasks to decide which task should execute next. Such an approach should scale better than the excessive global synchro...