1. One or more machine-accessible memories storing instructions that when executed by a machine result in carrying out of operations comprising: presenting an interface associated with a virtual machine monitor, the interface to facilitate transferring of data from a first application buffer memory space of a first virtual machine to a second application buffer memory space of a second virtual machine, the first virtual machine executing a first operating system, the second virtual machine executing a second operating system, the interface being accessible by the operating systems, the transferring comprising bypassing use of the operating systems and directly transferring the data from the first application buffer memory space to the second application buffer memory space without buffering the data, the first application buffer memory space being comprised in a first application, the second application buffer memory space being comprised in a second application, the first application being comprised in the first virtual machine, the second application being comprised in the second virtual machine; and establishing corresponding queue pairs associated with the first and second virtual machines to facilitate the transferring.