Timekeeping in a VMware Virtual Machine
Created on: Feb 28, 2008 12:00 AM by VMworld Team - Last Modified: Jul 24, 2009 2:31 PM by VMworld Team
Session Details | |
|---|---|
Session ID: | AP13 |
Session Title: | Timekeeping in a VMware Virtual Machine. |
Session Abstract: | Timekeeping accurately in a virtual machine is essential for nearly all services in a Virtual Infrastructure. But the PC Timer Hardware weren't designed to keep the time for virtual machines. This gets more complex because different operating systems are using different PC Timer Hardware like PIT and TSC and so on. VMware products use a patent-pending technique to allow the many timer devices in a virtual machine to fall behind real time and catch up as needed, yet remain sufficiently consistent with one another that guest software is not disrupted by anomalous time readings. This presentation will provide information on how virtual machines keep the time and best-practice recommendations about how to configure time synchronization and how to determine if time keeping works accurately. |
Track: | Application Workloads and System Performance |
Session Type: | Technical Deep-dive Session |
Keywords: | VMware Infrastructure |
Duration: | 60 minutes |
Speaker(s): | Thomas Findelkind, VMware |
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