Program control device

Abstract

Provided is a program control device which switches, per timeslot, between threads to be executed. The program control device includes: a first interrupt creation unit which creates a first interrupt signal which designates a timeslot as a destination; and a first receiving unit which does not receive the first interrupt signal if the timeslot as the destination is not a current timeslot, and receives the first interrupt signal if the timeslot as the destination is the current timeslot.

Description

technical field [0001] The present invention relates to a program control device for switching threads to be executed for each time slot, that is, an operating system (Operating System: OS). Background technique [0002] The main functions of the OS are hardware management, thread management, data management, and input and output management. Among them, the thread management is used to manage the execution sequence of threads, and is an important function for efficiently operating the CPU, memory, input and output devices, and the like. [0003] Here, a "thread" is a control unit that uniformly manages a series of processes such as program startup, execution, and termination. [0004] Programs working under the management of the operating system are managed by threads, and OS operations related to program execution are executed in units of threads. [0005] One of the algorithms that determine the execution order of threads is round-robin scheduling. The method of round-r...

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Problems solved by technology

[0013] However, according to the above-mentioned conventional technology, as the number of threads increases, the number of switching times increases in the total time of all time slots, that is, one cycle, and at the same time, the area for managing contextual relations also increases. performance is difficult

[0014] Moreover, in the multiprocessor structure, each thread is directly assigned a certain processor because the thread is dependent on the description of the processor. When the structure of the multiprocessor is changed, the description of the thread must also be changed, so the The problem is, the lack of adaptability in thread design

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