Method for load distribution among the central processors of a m

Details Method for load distribution among the central processors of a m Method for load distribution among the central processors of a m

1987-12-23

1989-02-21

Dwyer, James L.

Telephonic communications

Centralized switching system

Switching controlled in response to called station...

379242, H04M 300

Patent

active

048072818

ABSTRACT:
A method of distributing the processing load among components of a multiprocessor system, such as a switching system, avoids having two different processors (CP9) simultaneously handling different jobs for the same connection. A plurality of central processors (BP,CP,IOC) and a central main memory (CMY) are connected in parallel to a central bus system (B:CMY). As soon as they are free, each processor fetches a job for handling a switching task from a job registering means (AR), and then fetches data about the appertaining connections from the main memory (CMY). Each processor stores a protective code corresponding to its address at a location associated with the job as soon as and as long as it is handling the job. However, it does not store its code in case a different processor (CP9) has already entered its protective code there. Every central processor has its own job memory (AS). When a processor finds the protective code of another processor associated with the job data, it forwards its own job to this other processor by entering this job into the job memory (AS) of the other processor.

REFERENCES:
patent: 4720854 (1988-01-01), Sand
patent: 4731817 (1988-03-01), Jonsson et al.

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