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Virtual Event | September 15-16, 2021
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Thursday, September 16 • 15:35 - 16:00
Host & Guest Tracing in Virtualization: "To sync, or not to sync?" - Stefano De Venuto, SUSE & Tzvetomir Stoyanov, VMware

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Tracing is instrumental for understanding how a complex system work or for investigating issues. In virtualized environments, however, we have the complete picture only if we trace both the host and the guests (and then we combine all the traces!). This talk shows how tools like trace-cmd and KernelShark can already be used for such purpose, including having the timestamps of the events in host and guests traces synchronized However, let's assume we have a combined trace and that the tracing tools are telling us that all is sync'd. Is that really the case? And how can we be sure? Well, this talks discusses a possible "event-driven" approach to check and evaluate how accurate the synchronization turned out to be and introduces a tool, implemented on top of libkshark, that can help to do this kind of analysis automatically.

avatar for Tzvetomir Stoyanov

Tzvetomir Stoyanov

Open Source Engineer, VMware
Tzvetomir Stoyanov, software engineer in the Open Source Technology Center, VMware/Bulgaria. Tzvetomir has been working with Linux and various unix-like operating systems for more than 20 years, first developing proprietary software. He joined VMware's Open Source Technology Center... Read More →

Stefano De Venuto

Intern, SUSE
Stefano De Venuto is a CS student at the University of Turin, and he is currently doing an internship at SUSE focusing on combined host and guest tracing in virtualized systems. He is also really interested in the cybersecurity field, specifically on low level stuff, and loves sk... Read More →

Thursday September 16, 2021 15:35 - 16:00 UTC
  KVM Track 1
  • Presentation Slides Attached Yes