Global clock system for multi-core multi-processor parallel system, and application method thereof

Abstract

The invention provides a global clock system for a multi-core multi-processor parallel system, and an application method of the global clock system. The global clock system comprises global clock sub-systems; each global clock sub-system is arranged on each processor node of the multi-core multi-processor parallel system; and the sub-system comprises a global clock synchronization module, a multi-core clock setting module and a global clock interrupt service module. The application method comprises the following sequential steps of: setting master and slave processor nodes; initializing the system; prohibiting a time base register; creating a core clock setting unit and starting a clock setting task; waiting for the clock setting tasks on all processor cores to be completed; for the master processor node, sending a global hardware interrupt, otherwise, starting the next step; processing the global hardware interrupt; and recovering system resources. The global clock system enables the multi-core multi-processor parallel system to have unified time and does not influence the system performance while ensuring time accuracy and errors.

Description

technical field [0001] The invention relates to the embedded field, in particular to a global clock system for a multi-core multi-processor parallel system and a usage method thereof. Background technique [0002] In embedded systems, clock management is crucial. It not only maintains the internal time of the system, but also needs to be used to control task delays and prevent tasks from waiting indefinitely while waiting for events, messages, semaphores, etc. Clock management is mainly accomplished by using the clock tick interrupt. Once the set time slice arrives, it will cause a clock tick interrupt. Every time a clock tick interrupt is responded, the system clock will be accumulated. [0003] In a multi-core multi-processor parallel system, each processor node will run an embedded operating system, and even different processor cores of the same processor node may run an embedded operating system. In this way, each operating system will implement clock management indepen...

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to aim at defects such as insufficient time synchronization accuracy, errors, and influence on system performance in existing multi-core multi-processor parallel systems, and propose a global clock system and a clock system for multi-core multi-processor parallel systems. How to use it

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