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Download e-book for iPad: 7th UK Computer and Telecommunications Performance by Rob Pooley, Jane Hillston (auth.), Jane Elizabeth Hillston

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.)

ISBN-10: 1447135385

ISBN-13: 9781447135388

ISBN-10: 3540197338

ISBN-13: 9783540197331

Performance engineering is a fast-moving box the place advances in know-how suggest that new matters regularly must be addressed. in keeping with this, the united kingdom desktop and Telecommunications functionality Engineering workshops have been arrange in 1985 to supply a invaluable chance for the dialogue and alternate of principles. they've got as a result develop into good confirmed because the concentration for tutorial and commercial practitioners from the united kingdom and Europe with an curiosity in functionality and modelling and research. This quantity includes the sixteen papers which have been awarded on the seventh annual workshop, held in Edinburgh in July 1991. The workshop highlighted quite a few elements of parallel computing - a space that is attracting an expanding volume of curiosity - and the paintings provided in those papers is of specific curiosity because the members used actual research to judge their versions. The papers hide an surprisingly wide selection of issues, either sensible and theoretical, together with advances in queueing conception, universal functionality difficulties and their ideas, exams of accessible instruments and displays of latest theoretical effects. the result's an incredibly finished insurance of this significant and tough box. This quantity presents an up to date evaluate of labor being performed by way of functionality engineers within the united kingdom and Europe and may be a useful reference ebook for researchers and practitioners wishing to familiarise themselves with some great benefits of functionality and analysis.

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

Example text

In this way we can create simple experiments. Similar templates are made for the channels. 2 Time-Varying Parallel Programs Many parallel programs exhibit non-uniform, non-predictable computational and communications patterns to a significant degree. For example, parallel discrete event simulations, data dependent applications , partiele dynamics and neural net simulations. We call these programs time-varying parallel programs. We characterise time-varying parallel programs by using function specifications to describe a program's behaviour.

R denotes a router unit, M a memory module each memory. Averaging over randomly generated requests and over all possible destinations and sourees we obtain: where dav is an average message passing distance, defined as: where Dj(i) is the number of the nodes at the distance i of the souree node j. The sum over index i is taken from 1 to the maximal distance in the network, known as the diameter . Taking into account that Dj(i) is equal to zero for distances more than the diameter or less than zero, we may consider that the sum is taken over all integer i.

G. 3 to 5 step 1. This approach is particularly useful in factorial type experiments. An EDL script with no varying parameters does not strictly speaking define an experiment but might be useful for test purposes. Suppose that we have a description of a parallel program and wish to investigate what would happen if we made some changes to it. We can describe these changes using an EDL script , see Figure 2 for an example. Lines 3-8 define the graph parameters. First of all the structure of the program graph is specified.

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7th UK Computer and Telecommunications Performance Engineering Workshop: Edinburgh, 22–23 July 1991 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.)


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