Explore the challenges and solutions for minimizing latencies in virtual machines using KVM virtualization technology. Learn about a framework for communication between host and guest systems that allows for dynamic priority boosting of virtual CPU threads. Discover how this approach addresses scheduling issues for time-sensitive workloads like audio and video processing in virtual environments. Delve into the design, implementation, and performance details of an x86_64 prototype that utilizes shared memory and hypercalls to achieve improved latency management. Gain insights into the technical challenges encountered during the development process and understand the potential impact on virtualized system performance.