System of controlling procedure execution using process control

Details System of controlling procedure execution using process control System of controlling procedure execution using process control

1974-12-02

1978-04-11

Nusbaum, Mark E.

Boots, shoes, and leggings

G06F 918

Patent

active

040842240

ABSTRACT:
A system and method for computer process control in a multiprogramming/multiprocessing environment is disclosed. Each process in the system is associated with a process control block (PCB) hardware structure which is identified by its logical address (J,P). The PCB acts as a virtual processor with null speed when, in fact, no real processor is assigned to the process. As utilized in a multiprogramming environment a virtual process (PCB) is substituted for the real processor (i.e. central processing unit, CPU) whenever the only job of the processor is to listen for a signal to be sent by another processor and to restitute the real processor to the process when, or after, the signal has arrived. The circumstances where a process starts using a processor solely as an "ear" are as follows:
A. when the process state switches from a running state to a waiting state; or
B. when the process state switches from a running state to a suspended state.
In both instances the CPU is given away and replaced by the PCB.

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patent: 3725864 (1973-04-01), Clark et al.
patent: 3757307 (1973-09-01), Cosserat et al.
patent: 3824561 (1974-07-01), Wolf

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