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Tuesday, October 22 • 4:30pm - 5:00pm
Efficient and Scalable Virtio - Abel Gordon, IBM Research

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Virtio is the most popular I/O virtualization model because it enables KVM to interpose on the guest's I/O at a reasonable performance cost. This interposition is required to implement useful virtualization features such as file-based images and live migration. Both QEMU's user-space and vhost's in-kernel virtio frameworks used to achieve acceptable performance but current trend towards multi-core systems and towards faster networks are exposing the inefficiencies and scalability problems of these virtio back-ends. In this talk, we will start by describing the causes for the virtio overhead and discuss why today's back-ends do not scale with the number of cores, number of virtual machines, faster networks and faster block devices. Finally, we will describe ELVIS, a new model which improved virtio performance by 1.2x–3x, approaching and in some cases exceeding SR-IOV performance.

Speakers
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Abel Gordon

Systems Researcher, IBM
Abel Gordon is a systems researcher at IBM Research -- Haifa, where he leads | multiple activities in the area of machine and I/O virtualization. Abel co-authored and presented several academic papers in the virtualization area. He is a co-author of ""The Turtles Project: Design and Implementation of Nested Virtualization"" which received the OSDI Jay Lepreau Best Paper Award and | IBM Research Pat Goldberg Memorial Best Paper award. His... Read More →


Tuesday October 22, 2013 4:30pm - 5:00pm
Melville Suite

Attendees (16)