Abstract:

The UltraSparc T1/T2 processor provides virtualization support.Its platform firmware Hypervisor acts as the virtual machine manager. The logical domain channel is a software mechanism that supports the domaintodomain and domaintohypervisor communication. The logical domain channel is a simple implementation  lacking flexibility.Besides,the communication based on the logical domain channel needs data copying so as to heavily decrease the performance of data transfer.This paper introduces a new technique of logical domain channel. It directly transfers data from one side to the other side based on data descriptors and needs no copying.On the other hand,the size of the transferred data will not be limited by the buffer size of the logical domain channel.The new technique implements a more flexible and quick data transfer between virtual machines.

Key words: virtualization;logical domain;logical domain channel;descriptor