[Xen-users] gcc optimizations inside pv_ops DomU

[Eddie Chapman <eddie@xxxxxxxx>]

Hello folks,

dom0: Xen 4.0, pv_ops 2.6.31.13, 64 bit
domU: Centos 5.4 with vanilla pv_ops 2.6.33.2, 32 bit, paravirtualized

My question is, if I compile something from source inside the DomU, will
gcc optimize for the Dom0 CPU (in this case an Intel Core2 Quad)?  i.e.
if I were to use -mtune=native and -march=native?

And, crucially, would I then gain the benefits of the gcc optimizations
or are they somehow rendered ineffective due to the fact that the dom0
is paravitualized?

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