Nathalie Furmento

TL;DR: The Hardware Locality (hwloc) software is introduced which gathers hardware information about processors, caches, memory nodes and more, and exposes it to applications and runtime systems in a abstracted and portable hierarchical manner.

TL;DR: Imperial College e-Science Networked Infrastructure (ICENI), a Grid middleware framework developed within the London e- science Centre, is described and the effectiveness of this architecture is demonstrated through the high-level specification and solution of a set of linear equations by automatic and selection of optimal resources and implementations.

TL;DR: The adoption within ICENI of web services to enable interoperability with the recently proposed Open Grid Services Architecture is described.

TL;DR: The runtime, which is based on a multi-level thread scheduler combined with a NUMA-aware memory manager, converts this information into scheduling hints related to thread-memory affinity issues that enable dynamic load distribution guided by application structure and hardware topology, thus helping to achieve performance portability.

TL;DR: This paper has extended the StarPU runtime system with an advanced inter-node data management layer that supports the sequential task-based programming model, and shows that this paradigm can also be employed to achieve high performance on modern supercomputers composed of multiple such nodes, with extremely limited changes in the user code.