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xen-users
Re: [Xen-users] xen on amd64 or intel
hello,
amd announced their "vanderpool" like technology called "pacifica" or
"iommu" to be available in all their newly released processors from this
month on (see amd press releases). amd's tech has some potential
advantages right now because the mmu is located within the cpu and so
supports some advanced tricks very handy for vitualization(nested page
tables etc.). on the other hand some reports say if you want to have more
virtual machines than actual processor cores intel's hyperthreading is the
way to go. intel also wants to release virtualization optimized chipsets
(i.e. northbridges that do the same tricks as amd's mmu).
On Thu, 09 Mar 2006 21:02:41 +0100, Erik Tews <erik@xxxxxxxxxxxxxxxxx>
wrote:
Hi
We would like to buy a new server-hardware for a xen-server. We are
going to run linux as dom0 and domU. The whole server will have 4 GB of
main memory. Do you got any suggestions if it is better to buy an
opteron (amd64) cpu, or an intel (ia32) cpu? A opteron is much better,
if you need more than 2 gb in the userspace, but intel has
virtualization build into hardware.
We currently tend to buy and amd64, has somebody an amd64 system
running, with i386 and amd64 domU systems mixed, or does know if it is
possible and/or stable? Is an intel cpu much faster when using
vanderpool, then an amd64 running in 32 bit mode without any special
hardware support?
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