Xen: Improving event channel scalability

Posted by rcpavlicek on Feb 26, 2013 10:57 AM EDT
blog.xen.org; By Wei Liu
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As machines are getting more and more powerful today, people want more from the powerful hardware. From a cloud user’s perspective, it is better to run more virtual machines on a single host. Xen currently supports running hundreds of guests on a single physical machine, but we plan to take it to the next magnitude – to run thousands of guests on a single host. To achieve this goal, we need to tackle several bottlenecks, ranging from the hypervisor to the guest kernel to the user space tool stacks. One of the most notable / tricky bit of all the improvements is certainly the event channel scalability, which should enable Dom0 / driver domains to handle more events than before, thus supporting more guests.

Xen project team member Wei Liu discusses current options for improving Xen's internal event channel scalability. You have the opporunity to give the project team your feedback about which option makes the most sense to you.

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