Xenserver adding a vCPU to a Windows server
I've have a couple of Citrix boxes on a Xenserver with one core of a E5440 processor each, I decided they could do with another vCPU so I added another in Xenserver but it doesn't seem to show properly.
I see nothing about a change of hardware in the Windows event log and systeminfo lists one CPU but if I look in device manager I can see 2 E5440 CPU's listed.
If I look in task manager on other multi core or hyperthreaded boxes I see a box showing how busy each core/CPU is but on this Citrix box I only see one CPU listed.
Have I missed a configuration?
I'm wondering if this could be a HAL issue.
The server is running 2003 Server SP2
I can see now that it is a HAL issue the server lists itself as uniprocessor free not multiprocessor free. Some reading is required I think.