Explore host and guest tracing in virtualization environments through this 20-minute conference talk presented by Stefano De Venuto from SUSE and Tzvetomir Stoyanov from VMware. Delve into the intricacies of kernel tracing across host and guest systems, focusing on trace data transfer and time stamp synchronization using PTP. Learn about the tools and libraries employed in this process, and understand the methods for verifying and validating results. Examine the accuracy of time synchronization through event-based approaches, including hrtimer, MSR events, idle task, and HLT events. Discover an automated tool for evaluation and compare PTP and KVM synchronization methods. Gain valuable insights into the challenges and solutions for maintaining accurate timing in virtualized environments, essential for effective debugging and performance analysis.