Method for sharing storage data in multi-cpu system and the system

Abstract

The invention discloses a method for multiple CPU systems to share flash memory and the systems. The method includes the steps that a secondary CPU system obtains catalog information of a storage device in a primary CPU system, and file description information in the catalog information is showed; the secondary CPU system writes a file system calling instruction containing file address information into a shared memory space, and a notification message is sent to the primary CPU system; the primary CPU system receives the notification message, and the file system calling instruction is read from the shared memory space of the secondary CPU system; file data indicated by the file address information are read in a local storage device, the read file data are stored in the shared memory space of the secondary CPU system, and a notification message is sent to the secondary CPU system; the secondary CPU system receives the notification message and reads the file data in the shared memory space. By means of the method, people can have access to the file data in the primary CPU system in the way that people have access to local file data of the secondary CPU system.

Description

technical field [0001] The invention relates to data processing technology, in particular to a method for sharing and storing data by multi-CPU systems and the system. Background technique [0002] Currently, in a multi-CPU system based on PCI (Peripheral Component Interconnect) or PCIe (Peripheral Component Interconnect Express), some CPU systems can obtain file data from other CPU systems. , here, the CPU system that contributes and shares data is called the master CPU system, and the CPU system that obtains file data from the master CPU system is called the slave CPU system. In a PCI / PCIe-based multi-CPU system, that is, the main CPU system and each slave CPU system are connected through PCI or PCIe, so as to realize the interaction between the main CPU system and each slave CPU system. [0003] The storage device of the master CPU system stores the file data for sharing to the slave CPU system. Existing methods for sharing storage data include: [0004] When the slave ...

AI Technical Summary

Problems solved by technology

[0005] The defect of the existing multi-CPU system sharing storage data is that the user must know the file identification of the file data to be accessed in advance, and input the file identification to the slave CPU system, and then the slave CPU system can send the call command containing the file identification to the slave CPU system. CPU system; using the existing method, the user can only access the file data that has already known the file ID, and cannot access other file data that does not know the file ID in the main CPU system; if the slave CPU system can access local file data like Access to all file data in the main CPU system will further meet the needs, but there is no such technology at present

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