Pandu. I don't have the link handy. But there is a list of safe CFLAGS. Pick the one for the older CPU. That should be safe.
-- Joost Pandu Poluan <pa...@poluan.info> wrote: >Hello list! > >My company has 2 HP DL585 G5 servers and 5 Dell R... something servers. >All >using AMD processors. They currently are acting as XenServer hosts. > >How do I determine the 'least common denominator' for Gentoo VMs >(running >as XenServer guests), especially for gcc flags? > >I know that the (theoretical) best performance is to use -march=native >, >but since the processors of the HP servers are not exactly the same as >the >Dell's, I'm concerned that compiling with -march=native will render the >VMs >unable to migrate between the different hosts. > >Note: Yes I know the HP servers are much older than the Dell ones, but >if I >go -march=native then perform an emerge when the guest is on the Dell >host, >the guest VM might not be able to migrate to the older HPs. > >Rgds, >-- -- Sent from my Android phone with K-9 Mail. Please excuse my brevity.
