Distributed virtual machine self-adaptive memory consistency protocol, design method thereof and terminal

Abstract

The invention provides a design method of a distributed virtual machine self-adaptive memory consistency protocol, which comprises the following steps of: intercepting synchronous operation: aiming atdifferent applications, flexibly switching a vCPU (Virtual Central Processing Unit) of a client in a sequential consistency mode and a TSO (Transport Storage and Offloading) mode; the state description of the synchronization protocol: on the basis of the original memory consistency protocol, adding Dirty and a corresponding atomic operation state, and realizing state transition. Meanwhile, the invention provides a distributed virtual machine self-adaptive memory consistency protocol obtained based on the design method and a terminal used for executing the design method. According to the method, on the basis of the distributed virtual machine, the distributed shared memory can obtain better performance. According to the method, the memory synchronization protocol of the distributed virtualmachine is flexibly switched in order consistency and x86-TSO; for different application scenarios and restrictions, the adaptive consistency protocol relaxes the original sequence consistency to x86-TSO, so that the performance of the distributed shared memory is improved.

Description

technical field [0001] The present invention relates to the technical field of computer virtualization and distributed system architecture, and specifically relates to a distributed virtual machine self-adaptive memory consistency protocol, a design method thereof, and a terminal. Background technique [0002] Distributed virtual machines provide massive computing and I / O resources for a single or even multiple virtual machines by abstracting hardware resources on multiple machines to meet application scenarios with extremely high resource and performance requirements. On the basis of QEMU-KVM, the distributed virtual machine adds several functional modules, including IPI forwarding, interrupt forwarding, I / O forwarding, clock synchronization and distributed shared memory modules, and the machines are connected through the RDMA network. [0003] In the current distributed virtual machine, the protocol of the distributed shared memory is a sequential consistency (Sequential C...

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Problems solved by technology

However, this memory consistency protocol cannot guarantee that the memory synchronization protocol of distributed virtual machines can be switched flexibly between sequential consistency and x86-TSO, which greatly reduces the performance of distributed shared memory.

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