Accession Number : ADA114604

Title :   ADA on Multiple Processors,

Corporate Author : ROYAL SIGNALS AND RADAR ESTABLISHMENT MALVERN (ENGLAND)

Personal Author(s) : McDermid,John A

PDF Url : ADA114604

Report Date : 11 Mar 1982

Pagination or Media Count : 9

Abstract : This paper considers a number of possible ways of implementing the Ada rendezvous in a computer system comprising a number of processors. It shows that, in principle, a two phase protocol requiring four messages to be passed is necessary to implement the rendezvous correctly when timed calls are used. However in many cases a simpler, one phase, protocol requiring only two messages per rendezvous can be used. A comparison is made between the rendezvous and message based communication for situations where one to many, rather than one to one, communication is required. The rendezvous is shown to be very inefficient for implementing one to many communciation. Finally some of the problems of loading and running Ada programs are briefly considered. (Author)

Descriptors :   *Multiprocessors, Computer communications, Multichannel communications, Message processing, Data processing, Multiple operation, Coordinates, Computer programs

Subject Categories : Computer Programming and Software
      Computer Hardware

Distribution Statement : APPROVED FOR PUBLIC RELEASE