Showing papers on "Benchmark (computing) published in 1972"

An ISL-8 and ISL-15 study of the physiological simulation benchmark experiment

Abstract: PHYSBE is an acroynm for PHYsiological Simulation Benchmark Experiment, and was introduced1as a suggested standard for evaluating tools and tech niques available for physiological simulation. The mathematical model relates pressure, volume, flow, and resistance in a simplified cardiovascular system.PHYSBE is an excellent benchmark problem because it is not easy to obtain accurate results with an all-analog or all-digital simulation. The large differences in time-dependent constants (1.63 to 90.0) allow a good check of digital integration routines. Roundoff accumulation errors can be devastating to digital solutions. On the other hand the compliance generators (the driving func tions) are difficult to program with general- purpose diode function generators found on analog computers.Previous PHYSBE articles2,3,4have discussed the amount of time it has taken to program with FORTRAN (on a CDC 3600 computer), MIMIC and DSL/90 (on an IBM 7090 computer), CSMP (on an IBM 1130 computer), and DARE I (on a PDP-9 com...

RECONS - - - a REspiratory CONtrol System benchmark simulation

Abstract: PAUL J. DIONNE received a BS in Engineering from the University of California at Los Angeles in 1960 and an MS in Electrical Engineering from the University of Washington in 1971. He worked for the General Electric Company before joining Battelle-Northwest in 1965. A majority of his working time since then has been oriented toward biological modeling, where he has directed the development of over a dozen biologyecology-oriented models. Various short courses, conferences, and graduate level courses, as well as onthe-job learning, have helped to give him a working knowledge of the physiology of mammals. His thesis topic was computer measurement of cardiac output. Mr. Dionne is the Technical Leader of the Process

Effects of secondary storage I/O contention on the performance of an interactive information management system

Abstract: An analysis is presented of the effects of contention for the use of the Input/Output channel to secondary storage. Quantitative results are obtained by means of a discrete simulation for an IBM System/360 Model 50 computer under the operating environment of a real-time interactive management information system (United Aircraft Information Management System - UAIMS). Alternative software and Input/Output hardware device configurations that would support increased demands for service are modeled and the relative throughput capabilities and device utilizations are compared and discussed.The model, written in GPSS/360, was designed to give substantive results reasonably independent of the specific software packages involved. In this way performance aspects dependent on the basic system architecture become more readily apparent. Conclusions drawn from the statistics of the model runs are general to interactive on-line systems of the nature discussed.Results are derived in relative rather than absolute terms. A representative benchmark configuration was modeled, and the capabilities of the other configurations measured in terms of this. When two on-line transaction partitions are maintained, it is shown that the through-put capability can be improved by 16 to 42 percent by the use of two selector channels instead of one. The degree of improved capability is dependent on the device type attached and the amount of contention that exists for the seek facility.