Data transmission method and virtualization system

Abstract

A data transmission method and a virtualization system are provided, and relate to the field of virtualization technologies, to reduce overheads of receiving multicast data or broadcast data. The virtualization system includes a first virtual machine and a plurality of second virtual machines. The first virtual machine includes a shared memory that is allowed to be accessed by at least two second virtual machines. The method includes: The first virtual machine receives data, where the data is sent to the at least two second virtual machines; when the data does not exist in the shared memory, the first virtual machine stores the data in the shared memory; and the first virtual machine sends a storage address of the data in the shared memory to any second virtual machine of the at least two second virtual machines.