Method and device for accessing shared resources in a multi-core processor system

Abstract

Embodiments of the present invention disclose a method and an apparatus for accessing a shared resource, and a computer storage medium. The method for accessing a shared resource comprises: setting a status bit indicating an access status of a shared resource; when the shared resource is randomly accessed from a core processor, determining, according to the status bit, whether the shared resourced is currently accessed; when it is determined that the shared resource is not accessed, accessing the shared resource from the core processor, and setting the status bit; and after the access from the core processor ends, resetting the status bit.

Description

technical field [0001] The invention relates to a shared resource access technology in the communication field, in particular to a method and device for accessing a shared resource in a multi-core processor system. Background technique [0002] With the rapid development of multi-core processor technology, most terminals have adopted multi-core processor systems at present, and the existing multi-core processor systems all adopt the concept of resource sharing, so as to reduce hardware configuration costs. Existing multi-core processor systems usually include a master core and several slave cores. However, since there are many overlapping resources between cores, shared resources such as radio frequency control, bus clock, and phase-locked loop are used in the prior art. Access to the output frequency, etc. can only be performed by the master core. If the slave core wants to access shared resources, it needs to be accessed through the master core. Assume that core A is the ...

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Problems solved by technology

[0003] However, this method of adjusting shared resources through the master-slave core makes the coupling between the cores greater, the probability of errors is greater, and it is difficult to locate and solve problems; moreover, as long as any slave core needs to operate the shared resources, must ensure that the main core is in the wake-up state, so that it will cause waste of power consumption

Moreover, with the development of consumer digital terminals, the business and multimedia functions of the terminal are becoming more and more abundant, and the hardware requirements for the terminal are also getting higher and higher, and more and more core units are integrated in the central processing unit (CPU). The number of cores also increases accordingly. In this way, it is very likely that each slave core will keep accessing shared resources, resulting in the situation that the main core cannot sleep all the time, which will inevitably lead to a great increase in power consumption.

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