Original upload: 2021 Jun 01
Improving Virtual Periodic Timers – Roger Pau Monné, Citrix Systems R&D
Virtual (periodic) timers are a subsystem of Xen used by HVM guests in order to more easily manage the emulated event timers implemented in the hypervisor. Such subsystem is mainly designed to allow the injection of an interrupt at a certain interval. The author has been doing some work in order to improve and simplify the logic in virtual timers, and the talk will give details about the changes done for virtual periodic timers itself and other parts of Xen in order to achieve it.
For more info about the Xen Project, which is focused on advancing virtualization in a number of different commercial and open source applications, including server virtualization, Infrastructure as a services (IaaS), desktop virtualization, security applications, embedded and hardware appliances, and automotive/aviation, see: or for more videos.
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