Accession Number : AD0718843

Title :   The Design of a Meta-System for Measurement and Simulation of Time-Sharing Computers.

Descriptive Note : Technical rept.,

Corporate Author : MOORE SCHOOL OF ELECTRICAL ENGINEERING PHILADELPHIA PA

Personal Author(s) : Noetzel,Andrew S.

Report Date : FEB 1971

Pagination or Media Count : 283

Abstract : The report presents the results of a study of a measurement-simulation technique for evaluating modifications to time-sharing systems. The technique consists of using raw data, obtained by measurement of an operational system, as the input to a simulation model of the variant version of the system. The results of the research are reported in the form of a detailed design of a system that will perform this evaluation. It is called the Meta-System. The Meta-System consists of three parts: event-recording mechanisms in the time-sharing system that record a 'system event trace', a pre-processor of the system event trace that decomposes it into independent 'task event traces' and the simulator that accepts these as input. The particular Meta-System designed in this study was developed to operate with a model time-sharing system, whose features have been abstracted from those of several modern systems. These features include demand paging, multi-tasking, dynamic loading, and a virtual access method. The description of the model system is included in the report. (Author)

Descriptors :   (*DATA PROCESSING, MATHEMATICAL MODELS), (*DIGITAL COMPUTERS, TIME SHARING), PERFORMANCE(ENGINEERING), INPUT OUTPUT DEVICES, SIMULATION, MEMORY DEVICES, SUBROUTINES, DESIGN

Subject Categories : Computer Programming and Software
      Computer Hardware
      Computer Systems

Distribution Statement : APPROVED FOR PUBLIC RELEASE