ANALYSIS AND DESIGN ISSUES FOR THE OPERATING SYSTEM KERNEL OF A PARALLEL SIMULAMACHINE
Abstract
THE AREA OF DISCRETE EVENT SIMULATION (DES) IS THE LEAST IMPACTED BY PARALLEL PROCESSING EVEN THOUGH MOST OF ITS APPLICATIONS REQUIRE TREMENDOUS AMOUNTS OF PROCESSING TIME. THE COMMON APPROACH OF PARALLELIZING INDIVIDUALLY SPECIAL PURPOSE PROGRAMS LEADS TO VERY LIMITED IMPROVEMENTS IN PERFORMANCE. WE PROPOSE HERE THE PARALLELIZATION OF GENERAL DES APPLICATIONS WRITTEN IN SIMULA, AS A PART OF AN ONGOING PROJECT THAT AIMS TOWARDS DEVELOPING METHODOLOGIES AND ARCHITECTURESFOR PARALLEL DES. SIMULA IS A GENERAL PURPOSE PROCESS ORIENTED LANGUAGE WHOSE STRUCTURE ALLOWS THE CREATION OF PROCESSES WHICH CAN PARTICIPATE IN A QUASI-PARALLEL EXECUTION ACCORDING TO AN INTERLEAVED FASHION . THE ARGUMENT THAT THE EVENT LIST OF THE SEQUENTIAL DES ALGORITHM CANNOT BE EFFICIENTLY PARTITIONED SO THAT TO SUPPORT CONCURRENT PROCESS EXECUTION IS DISPUTED, AND THE PROBLEM OF PARALLELIZING THE SEQUENTIAL DES ALGORITHM EMBEDDED IN HIGHER LEVEL SIMULATION LANGUAGES IS STUDIED. A GRAPH MODEL IS FIRST DEVELOPED TO ...
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