Accession Number : AD0635966

Title :   TRAFFIC CONTROL IN A MULTIPLEXED COMPUTER SYSTEM.

Descriptive Note : Doctoral thesis.

Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE PROJECT MAC

Personal Author(s) : Saltzer, Jerome Howard

Report Date : JUN 1966

Pagination or Media Count : 87

Abstract : The thesis describes a scheme for processor multiplexing in a multiple user, multiple processor computer system. The scheme is based upon a distributed supervisor which may be different for different users. The processor multiplexing method provides smooth inter-process communication, treatment of input/output control as a special case of inter-process communication, and provision for a user to specify parallel processing or simultaneous input/output without interrupt logic. By treatment of processors in an anonymous pool, smooth and automatic scaling of system capacity is obtained as more processors and more users are added. The basic design has intrinsic overhead in processor time and memory space which remains proportional to the amount of useful work the system does under extremes of system scaling and loading. The design is not limited to a specific hardware implementation; it is intended to have wide application to multiplexed, multiple processor computer systems. The processor traffic controller described here is an integral part of Multics, a Multiplexed Information and Computing Service.

Descriptors :   (*TRAFFIC, CONTROL), (*COMPUTERS, TRAFFIC), SCHEDULING, MULTIPLE OPERATION

Subject Categories : Computer Hardware
      Surface Transportation and Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE