[Xen-devel] How expensive is a VM EXIT?

[Emre Can Sezer <ecsezer@xxxxxxxx>]

Hi,

I've been trying to get a ballpark number on how expensive a VM EXIT is 
in terms of clock cycles. I'm also interested in how slow a TLB miss is. 
The only reference I was able to find was 13000 cycles for VM EXIT and 
around several hundred cycles for a TLB miss and a complete walk of page 
tables. Does anyone know from the top of their head or is there a 
reference you can share?
Thanks in advance.

John


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