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dc.contributor.advisor Cox, Alan L.
dc.creatorRam, Kaushik Kumar
dc.date.accessioned 2013-07-24T19:45:42Z
dc.date.accessioned 2013-07-24T19:45:46Z
dc.date.available 2013-07-24T19:45:42Z
dc.date.available 2013-07-24T19:45:46Z
dc.date.created 2012-12
dc.date.issued 2013-07-24
dc.date.submitted December 2012
dc.identifier.citation Ram, Kaushik Kumar. "New Architectures and Mechanisms for the Network Subsystem in Virtualized Servers." (2013) Diss., Rice University. https://hdl.handle.net/1911/71683.
dc.identifier.urihttps://hdl.handle.net/1911/71683
dc.description.abstract Machine virtualization has become a cornerstone of modern datacenters. It enables server consolidation as a means to reduce costs and increase efficiencies. The communication endpoints within the datacenter are now virtual machines (VMs), not physical servers. Consequently, the datacenter network now extends into the server and last hop switching occurs inside the server. Today, thanks to increasing core counts on processors, server VM densities are on the rise. This trend is placing enormous pressure on the network I/O subsystem and the last hop virtual switch to support efficient communication, both internal and external to the server. But the current state-of-the-art solutions fall short of these requirements. This thesis presents new architectures and mechanisms for the network subsystem in virtualized servers to build efficient virtualization platforms. Specifically, there are three primary contributions in this thesis. First, it presents a new mechanism to reduce memory sharing overheads in driver domain-based I/O architectures. The key idea is to enable a guest operating system to reuse its I/O buffers that are shared with a driver domain. Second, it describes Hyper-Switch, a highly streamlined, efficient, and scalable software-based virtual switching architecture, specifically for hypervisors that support driver domains. The Hyper-Switch combines the best of the existing architectures by hosting the device drivers in a driver domain to isolate any faults and placing the virtual switch in the hypervisor to perform efficient packet switching. Further, the Hyper-Switch implements several optimizations, such as virtual machine state-aware batching, preemptive copying, and dynamic offloading of packet processing to idle CPU cores, to enable efficient packet processing, better utilization of the available CPU resources, and higher concurrency. This architecture eliminates the memory sharing overheads associated with driver domains. Third, this thesis proposes an alternate virtual switching architecture, called sNICh, which explores the idea of server/switch integration. The sNICh is a combined network interface card (NIC) and datacenter switching accelerator. This takes the Hyper-Switch architecture one step further. It offloads the data plane of the switch to the network device, eliminating driver domains entirely.
dc.format.mimetype application/pdf
dc.language.iso eng
dc.subjectI/O Virtualization
Virtual switching
Network architecture
System performance
Hypervisors
Datacenter networking
dc.title New Architectures and Mechanisms for the Network Subsystem in Virtualized Servers
dc.type Thesis
dc.contributor.committeeMember Rixner, Scott
dc.contributor.committeeMember Varman, Peter J.
dc.date.updated 2013-07-24T19:45:46Z
dc.identifier.slug 123456789/ETD-2012-12-258
dc.type.material Text
thesis.degree.department Computer Science
thesis.degree.discipline Engineering
thesis.degree.grantor Rice University
thesis.degree.level Doctoral
thesis.degree.name Doctor of Philosophy


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