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Thursday, November 8 • 3:30pm - 4:00pm
Enabling Optimized Interrupt/APIC Virtualization in KVM - Jun Nakajima, Intel

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We are enabling the new VT features for interrupt/APIC virtualization in KVM. Although we reduced unique overhead of virtualization over the time, we still see some cases where virtualization of interrupts and APIC is a major source of overhead and latencies. The new features will eliminate and reduce overhead of significant portion of the VM exits associated with interrupt handling for virtualization. This talk explains the new VT extensions in details, including 1) APIC register virtualization, 2) virtual interrupt delivery, and 3) posted-interrupt processing, and then we discuss how we enable those in KVM.

The audience is expected to know about the internals of KVM and x86 virtualization, especially I/O and interrupt handling. If the audience is interested in I/O intensive or real-time systems in virtualization, he/she would have good insights from this talk.


Jun Nakajima

Jun Nakajima is a Principal Engineer leading open source virtualization projects, such as Xen and KVM, at the Intel Open Source Technology Center. Jun is also leading the virtualization projects for Android, including the Android emulator. He is recognize

Thursday November 8, 2012 3:30pm - 4:00pm

Attendees (12)