A Proposed Asynchronous Object Load Balancing Method For Parallel 3d Image Reconstruction Applications

Scientific applications usually exhibit irregular patterns of execution and high resource usage. Parallel architectures are a feasible solution to face these drawbacks, but porting software to parallel platforms means the addition of an extra layer of complexity to scientific software. Abstractions such as Object Orientation and models like the concurrent object model may be of great help to develop scientific parallel applications. The shared nature of parallel architectures and the stochastic condition of parallel schedulers underline the adaptivity as a desired feature for parallel applications. Load Balancers are key for achieving adaptivity, and benefit from object oriented models in issues like load migration. In this paper we present our experiences when porting scientific software using the concurrent object abstraction and a method to asynchronously invoke load balancers.