We are running a Win 2008 R2 server on an Hyper-V host. When I run "xperf" on the server and look at the data in Windows Performance Analyzer (Version 6.3.9600.16384) using the "CPU Usage (Precise)" view, I see that the CPU Usage of many processes is below Zero (in other words: negative). Is this a bug in WPA, or is it tied to the fact that the server is running in Hyper-V? What am I missing here?
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