Abstract
Synchronisation of two independently clocked processor units, or arbitration between two asynchronous units requesting access to a common resource, can cause serious time losses in a computer system. The ways in which these problems arise are considered, and a theoretical basis for calculation of the time losses is presented. The theory is then correlated with measurements on practical devices, and currently available methods for minimising the time loss are evaluated. Conditions necessary for prediction of the performance of synchronisers and arbiters are established and it is shown that design principles exist which allow the construction of systems with known reliability.
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