Data processing method and device

Abstract

The invention discloses a data processing method and device. Information of a second process requiring first resources is stored through a third process, and the process is not allowed to preempt a processor if the priority of the process preempting the processor is not greater than the priority of the process with the highest priority stored in the third process. Further, priority inversion is reduced, extra power consumption caused by frequent change of priority is avoided, and other problems caused by change of priority are avoided.

Description

technical field [0001] The present invention relates to the field of computer technology, and more specifically, to a data processing method and device. Background technique [0002] A process is a movement of a program with independent functions about a certain data set. He can apply for and own system resources and is an active entity. see figure 1 , the priority inversion problem means that a low-priority process C accesses a resource needed by a high-priority process A, and the high-priority process A is blocked due to lack of resources, and waits until the low-priority process C ends Until resource access, if process B is in the ready state with a priority between process C and process A while process A is waiting, and does not need the resources accessed by process C, process B preempts the processor, that is, suspends its operation Process C, and run process B. From this point of view, process A with the highest priority should run first, but process B with medium...

AI Technical Summary

Problems solved by technology

But this approach introduces other problems caused by changing the priority

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