Showing papers on "Task (computing) published in 1971"

Method for balancing the utilization of input/output devices

Abstract: During the operation of a data processing system capable of multi-tasking, a count is made of the number of times each I/O device is accessed by each task. The counting is done over the time interval between successive allocation routines. During each allocation, an analysis is made using the count and time interval to estimate the utilization of each device due to the current tasks. An estimate is also made of the anticipated utilization due to the task undergoing allocation. The estimated current and anticipated utilization are then considered and an attempt is made to allocate data sets to the least utilized I/O devices so as to achieve balanced I/O activity.

Multiprocessing computing system with task assignment at the instruction level

Abstract: The present invention relates to a multiprocessing system wherein job assignments to the respective processors are made at the level of very small tasks. Further, the system is organized so that none of the multiprocessing capabilities need be known either to the programmer or to a supervisory program. Task assignment is done at the instruction level. By instruction level is meant a typical computer''s machine language. In the disclosed embodiment, two processors are shown; however, it is to be understood that the basic concepts of the present invention could well be extended to more than two processors. Each of these processors shares a main store, a microinstruction store and a local store. Further, automatic control of the two systems is performed with the use of a set of shared latches to prevent one of the processors from interfering with another, with resulting erroneous results. Maximum availability of the system is assured since the system may operate either in the multiprocessing mode or, in the event that one of the processors should fail, the other processor can continue operating completely autonomously.

The Human Operator in Air Traffic Control Systems

Abstract: A short system analysis of the air traffic control systems with respect to their purpose and realization shows the role which the human operator plays. The task of man in this system can be determined as information processing. Evaluation of these tasks is important for selection of personal, for job evaluation, and for redesigning tasks and jobs in order to fulfill the tasks of ATC in future. This evaluation of man's tasks can be regarded either from the demands of the job or from their fulfillment and effect for man. Both aspects have to be connected to get objective results which are valid for man. Special research problems arise from the influence of the individual abilities and from the correlation of stress as work load factor and strain as effect of this work load on man.

Simulation of a two-man interaction system

Abstract: This paper describes a GPSS/360 simulation of a two-man machine model where the performance of both operators as they together perform a task comprising of a series of individual and/or interacting subtasks is simulated. The program considers in ter and in tra operator variance, and such factors as operator proficiency, stress tolerance and partner confidence. Output for various systems consists of areas of operator overload and underload, subtask and task failure or success and a comparison of the standard and actual execution times.