This paper describes the use of simulation techniques at SDC in the analysis of time-sharing system operation. The purpose and goals of this research effort are briefly outlined and some comments on the advantages and disadvantages of direct simulation for this type of work are given. The existing simulator models are described in terms of inputs, general flow, and outputs; and the results of initial investigations with these models are given. Work currently in progress is discussed, and some related problems that may possibly be studied in the future by similar methods are noted.
In May, 1965, System Development Corporation (SDC) proposed to do some research to study program organization with respect to dynamic program behavior. Further, the proposal suggested that simulation techniques might be used to study the problem of resource allocation in a multiprocessor time-sharing system. Some of the reasons for the proposal related to the prospective utilization of the time-sharing hardware features of the GE and IBM time-sharing computers. At the time, there was considerable interest in investigating the concepts of program segmentation and page turning, both at SDC and in the time-sharing community at large. The concept of fixed-size paging on demand particularly, raised some questions of practicality. One of the early papers on the subject by Dennis and Glaser1 states that the concept of page-turning can be either useful or disastrous, depending on the class of information to which it is applied. However, the theory appeared to be both advantageous and elegant, so that the future of time-sharing seemed to be committed to the concept.
Demand on Space Shuttle general-purpose computers reduced. Simulations Testbed and Scenario Pre-processor (STB&SPP) system reduces need for use of GPC's in hardware and software development and testing. System consists of computer program, SPP, and set of utility subroutines, STB, which incorporates Interface Simulator (ISIM). STB&SPP system written in FORTRAN V and Assembler.
article Free Access Share on Dynamic program behavior under paging Authors: Gerald H. Fine System Development Corp., Santa Monica, CA System Development Corp., Santa Monica, CAView Profile , Calvin W. Jackson Abacus Programming, Canoga Park, CA Abacus Programming, Canoga Park, CAView Profile , Paul V. McIsaac Bolt, Beranek and Newmann, Cambridge, MA Bolt, Beranek and Newmann, Cambridge, MAView Profile Authors Info & Claims Communications of the ACMVolume 9Issue 7July 1966 https://doi.org/10.1145/365719.366406Published:01 July 1966Publication History 2citation115DownloadsMetricsTotal Citations2Total Downloads115Last 12 Months11Last 6 weeks1 Get Citation AlertsNew Citation Alert added!This alert has been successfully added and will be sent to:You will be notified whenever a record that you have chosen has been cited.To manage your alert preferences, click on the button below.Manage my AlertsNew Citation Alert!Please log in to your account Save to BinderSave to BinderCreate a New BinderNameCancelCreateExport CitationPublisher SiteeReaderPDF
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