Global semaphore implementation method based on multi-core multi-processor parallel system

Abstract

The invention discloses a global semaphore implementation method based on a multi-core multi-processor parallel system. The method comprises the following steps: each processing core performs system initialization and maps a shared storage space through SRIO; each processing core creates a thread, initializes the thread, and establishes a mapping table of the thread and local semaphore; a global semaphore is created from a global semaphore buffer pool corresponding to a processing core to which the thread belongs, and the global semaphore information is filled into a global semaphore name table; and when the thread is suspended on a waiting queue of a global semaphore or is unsuspended, the thread is suspended or unsuspended through a semaphore proxy mechanism. Through a semaphore agent mechanism, the global semaphore is realized by utilizing a software method, the method can be used for occasions of thread synchronization and mutual exclusion among multi-core multiprocessors, and theproblems of thread synchronization and mutual exclusion at the same moment on a multi-core multiprocessor parallel system are solved.

Description

technical field [0001] The invention relates to a method for realizing a global semaphore, in particular to a method for realizing a global semaphore based on a multi-core multiprocessor parallel system, and belongs to the technical field of embedded computers. Background technique [0002] With the development of computer systems and the increasing demand for real-time and parallelism in its application fields, multi-core multi-processor parallel systems have become an important trend in the development of embedded computer systems, and have received close attention from academia and industry. [0003] Generally speaking, in a multi-core multi-processor parallel system, joint work between processor cores and processors is required, and multiple threads running at the same time may need to access or use the same resource; or there is a dependency between threads Relationship, the operation of a thread depends on another thread. In the case of high software complexity and st...

Images