System design with Ada
Task coupling and cohesion in Ada
ACM SIGAda Ada Letters
An assessment of the overhead associated with tasking facilities and task paradigms in Ada
ACM SIGAda Ada Letters
A review of Ada tasking
A simulation of the space station computer network
1987 Symposium on the simulation of computer networks on Simulation of computer networks
Comments on 'Measurement of Ada Overhead in OSI-Style Communications Systems'
IEEE Transactions on Software Engineering
Practical trade-offs for open interconnection
CSC '92 Proceedings of the 1992 ACM annual conference on Communications
Alternative software architectures for parallel protocol execution with synchronous IPC
IEEE/ACM Transactions on Networking (TON)
Toward a real-time Ada design methodology
TRI-Ada '90 Proceedings of the conference on TRI-ADA '90
IEEE Transactions on Software Engineering
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A discussion is given on whether the Ada model of concurrency is suitable for implementing the seven-layer OSI reference model. Using the communications model introduced by R.J.A. Buhr (1984), they determine the overhead introduced by Ada when the model is implemented on two single-processor machines, a VAX 11/785 and a Rational 1000. The authors then calculate a lower bound on expected message delay. A novel model using server tasks is proposed and shown to have better performance. The authors investigate performance on an eight-processor Sequent Model 821 and a 14-processor Encore Multimax 320 by implementing the Buhr model, the server task model and a third model which abandons the Ada rendezvous in favor of procedure calls. They determine the Ada overhead per message as a function of the number of processors and calculate lower bounds on expected message delay attributable to Ada overhead for all three communications models.