By Rob Pooley, Jane Hillston (auth.), Jane Elizabeth Hillston BA, MSc, Peter John Beaufoy King BSc, MSc, PhD, C.Eng, MBCS, Robert John Pooley BSc, MSc (eds.)

Performance engineering is a fast-moving box the place advances in expertise suggest that new matters continuously must be addressed. based on this, the united kingdom laptop and Telecommunications functionality Engineering workshops have been arrange in 1985 to supply a beneficial chance for the dialogue and alternate of rules. they've got accordingly turn into good validated because the concentration for tutorial and business practitioners from the united kingdom and Europe with an curiosity in functionality and modelling and research. This quantity comprises the sixteen papers that have been offered on the seventh annual workshop, held in Edinburgh in July 1991. The workshop highlighted a number of facets of parallel computing - a space that's attracting an expanding volume of curiosity - and the paintings offered in those papers is of specific curiosity because the members used genuine research to guage their versions. The papers hide an surprisingly wide selection of themes, either functional and theoretical, together with advances in queueing concept, universal functionality difficulties and their ideas, tests of obtainable instruments and displays of recent theoretical effects. the result's a really finished assurance of this crucial and tough box. This quantity offers an up to date evaluate of labor being performed by way of functionality engineers within the united kingdom and Europe and should be a useful reference e-book for researchers and practitioners wishing to familiarise themselves with some great benefits of functionality and analysis.

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Additional resources for 7th UK Computer and Telecommunications Performance Engineering Workshop: Edinburgh, 22–23 July 1991

Example text

MIMD provides new classes which are appropriate for modelling the execution of message passing parallel programs on distributed memory architectures. At the moment MIMD is tailored towards simulating occam programs on Transputer machines. It would be a relatively easy task to extend the range of languages and machines supported by defining new subclasses to handle different communications protocols and scheduling strategies. The standard facilities provided by MIMD can be augmented where necessary with the full power of the Simula language.

The multi-request models can be viewed as modelling vector machines and the networks built out of them. To obtain a mathematical description of the network a Queueing Model [3] can be used. Queueing Theory deals with the equations describing the probability of finding tbe model in the particular state at a given time t. When t -+ 00 the probabilities are considered to be independent of time and tbe model is said have reacbed a steady state. The equations for the steady state probabilities are known as balance equations.

In the following sections we give an overview of MIMD and describe two modelli ng engines that have been constructed to dea l with distinct classes of par allel programs. 3 The MIMD Simulation System MIMD [7] is a Mult iple Instruction stream, Multiple Data stream computer simulation system which simulates th e execution of arbitrary message passing parallel programs on user defined dist ributed memory muitiprocessors. A full description of the MIMD package and its validat ion for occam programs running on the Meiko Comput ing Surface can be found in [8).

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