Remote memory access method, apparatus and system

Abstract

Embodiments of the invention provide a remote memory access method, apparatus and system. The method comprises the steps of setting a first identifier in a descriptor of a first data package through a Load-Store sending engine, and sending the first package and the descriptor of the first data package to a transmission layer, wherein the first identifier is used for identifying that the data package is from the Load-Store sending engine; preferentially sending the first data package and the descriptor of the first data package to a data link layer by the transmission layer according to the first identifier; and generating a second data package by the data link layer according to the first identifier and the first data package, and sending the second data package to a physical layer for performing transmission, wherein the second data package contains the first identifier. According to the remote memory access method, apparatus and system, the data package from the Load-Store sending engine can be preferentially processed, so that the time delay of Load-Store memory access is shortened.

Description

technical field [0001] The embodiments of the present invention relate to computer technology, and in particular to a remote memory access method, device and system. Background technique [0002] The remote memory access method includes a remote direct memory access (Remote Direct Memory Access, referred to as: RDMA) access method and a load-store (Load-Store) access method. Unit, referred to as: CPU) completely takes over the control of the bus, the memory data exchange does not pass through the CPU, but directly transmits between the local memory and the remote memory, and reports the end of the transfer operation to the CPU in an interrupt manner. The Load-Store access method is that the CPU directly reads from the register or writes memory data to the register. Load is used to load the data in the remote memory into the local register; Store is used to store the data in the local register to the remote Memory. According to the characteristics of the two remote memory a...

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Problems solved by technology

[0004] However, using existing technology methods only reduces latency at the transaction layer, and cannot guarantee the end-to-end low latency requirements of data streams that are very sensitive to latency, such as Load-Store memory access. Usually, if a Load-Store Excessive memory access delays may cause applications to hang or even the entire CPU to be paralyzed

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