Giant virtual machine based on release consistency memory synchronization

Abstract

The invention relates to a giant virtual machine based on release consistency memory synchronization, which comprises a plurality of virtual machine nodes, and each virtual machine node comprises a physical memory and a mapping manager; the physical memory comprises a plurality of pages and a local page cache, and the local page cache is used for storing pages managed by other virtual machine nodes; the virtual machine node mapping manager is controlled by a program to execute the following read operation or write operation: the virtual machine node mapping manager searches for a page corresponding to a read-write address in a local page and a local page cache, and if the local page and the local page cache are not hit, a request is sent to a virtual machine node of a page corresponding to a remote management read-write address, and page information corresponding to the read-write address is obtained and stored in a local page cache; and the virtual machine node mapping manager performs read operation or write operation on the searched page. The method has the beneficial effects that the problem of pseudo sharing of the distributed shared memory is prevented, and the cross-node memory access frequency is reduced.

Description

[Technical field] [0001] The present invention relates to the field of computer technology, and more particularly to a giant virtual machine based on release consistency memory synchronization. 【Background technique】 [0002] The giant virtual machine builds a distributed virtual machine monitoring program by integrating multiple machine resources, providing unified hardware abstraction for the upper client operating system. The giant virtual machine is based on QEMU-KVM, implements the CPU virtualization, I / O virtualization, and memory virtualization of multiple physical machines. The giant virtual machine implements the hardware abstraction of the virtual layer through the high-speed RDMA network. Using the distributed QEMU to build a cross-node virtual machine, with the KVM, the interface is provided to create and manage the virtual machine, and distributed distributed shared memory is established based on the RDMA network. A "multi-virtual" virtual machine has been establis...

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Problems solved by technology

[0004] Existing work has tried to use the RDMA network transmission protocol to optimize the network transmission of giant virtual machines, but the network transmission is always slower than the local memory access, fundamentally solving the false sharing problem and reducing the frequency of cross-node memory access requires modifying the memory Semantics of the synchronization protocol

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