Accession Number : ADA227852


Title :   Distributed Issues for Ada Real-Time Systems


Descriptive Note : Final rept.


Corporate Author : LABTEK CORP WOODBRIDGE CT


Personal Author(s) : Griest, Thomas E


Full Text : http://www.dtic.mil/dtic/tr/fulltext/u2/a227852.pdf


Report Date : 23 Jul 1990


Pagination or Media Count : 314


Abstract : This work addresses an approach to reduce the complexity of distributed systems by extending the standard Ada tasking model to handle the distributed processing and by introducing a failure model for reliability issues. It uses software developed in a previous CECOM research project, the Border Defense System (BDS) distributed demonstration application, that addressed the performance benefits that could be gained by the distribution of real-time Ada systems. To achieve increased performance, a new approach to improving parallel execution was studied. The approach was to create a data structure consisting of an array of tasks and distribute the elements of the array across a set of processors. Performance benefits are then achieved as a function of the available processors. A simple failure model appropriate for a class of applications which can tolerate interruptions in service for up to one second was introduced. (kr)


Descriptors :   *DISTRIBUTED DATA PROCESSING , *SYSTEMS APPROACH , *REAL TIME , MODELS , DEMONSTRATIONS , DISTRIBUTION , FAILURE , BOUNDARIES , RELIABILITY , THROUGHPUT , PARALLEL ORIENTATION , DEFENSE SYSTEMS , ADA PROGRAMMING LANGUAGE , COMPUTER PROGRAMS , DATA BASES


Subject Categories : Computer Programming and Software
      Computer Systems


Distribution Statement : APPROVED FOR PUBLIC RELEASE