Methods and devices for reading and updating storage region

Abstract

The embodiment of the invention provides methods and devices for reading and updating a storage region, wherein the method for reading the storage region comprises the following steps that: a first version mark of the storage region is read; data information is read from the storage region; a second version mark of the storage region is read; if the first version mark is different from the second version mark, the occurrence of read / write conflicts in the storage region in the process from the reading of the first version mark to the reading of the second version mark is determined, and the previous steps are repeatedly executed; and no occurrence of the read / write conflicts in the storage region is determined until the previously read first version mark maintains consistent with the later read second version mark. The method for updating the storage region comprises the following steps that: the second version mark of the storage region is updated; data information stored in the storage region is updated; and the first version mark of the storage region is updated, so that the updated first version mark maintains consistent with the updated second version mark. The write concurrent execution cannot cause the system thrashing, and the concurrent execution of the read and write operation can be carried out in the same storage region.

Description

technical field [0001] The embodiment of the present invention relates to computer technology, and in particular to a method and device for reading and updating a storage area. Background technique [0002] In the multi-core era, due to the bottleneck in the increase of the main frequency of the processor, the computer mainly uses parallel computing to increase the operating speed. In the process of parallel computing, it is often necessary to perform read and write operations on the shared memory area. When two or more cores execute multiple read and write instructions on the same memory area at the same time, due to multiple read and write instructions on the system bus The write operation instructions may be executed in any combination order, which will cause the execution result of the program to be inconsistent with that of the two read and write instructions executed separately. [0003] The solutions provided by prior art 1, such as the Hibernate solution, use optimi...

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides a method and device for reading and updating a storage area to solve the defect that the read and write operations of accessing the same storage area cannot be performed concurrently

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