Memory protection method and system and network interface controller

Abstract

The invention provides a memory protection method and system and a network interface controller. The memory protection method comprises the steps that a KEY is inserted into an access and storage command sent by a credible entity on an application program, wherein the KEY corresponds to the virtual memory space distributed to the application program; the fact that whether the access and storage command has an access right is judged by the network interface controller according to a memory protection table and then whether the access and storage command is allowed to be executed is judged. According to the memory protection method and system and the network interface controller, memory protection is provided for each node of a system with multiple computer nodes, and bad consequences caused by misoperation or malicious operation of the application program are prevented; in addition, performance of I / O operation is improved.

Description

technical field [0001] The invention relates to the technical field of high-performance user-level communication, in particular to a memory protection method, system and network interface controller. Background technique [0002] In a multi-computer node system, the nodes are interconnected through an indirect network or a direct network. Since computer nodes often need to communicate and exchange data, and the performance of message transmission will affect the performance of communication, it is possible to flexibly and efficiently copy message data from the memory of one node to the memory of another node, which can be used for multiple computer nodes. The powerful communication capability provided by the system. Direct memory data access by the processor will bring huge processor overhead, and direct memory access (DMA) technology can prevent the processor from wasting processing power in simple and repetitive memory read and write operations, so multi-computer nodes D...

AI Technical Summary

Problems solved by technology

However, in doing so, there may be misoperation or malicious operation of the application program, such as initiating an access to a memory address that is not allowed to be accessed, thereby causing adverse consequences; at the same time, converting a virtual address into a physical address is a process that the processor participates in, which increases the The delay of I / O operation affects I / O performance

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