[CentOS-virt] performance differences between kvm/xen
dennisml at conversis.de
Sat Oct 16 15:58:15 EDT 2010
On 10/16/2010 08:11 PM, Pasi Kärkkäinen wrote:
> On Thu, Oct 14, 2010 at 02:16:42PM +0100, Bart Swedrowski wrote:
>> Hi Karanbir,
>> On 14 October 2010 19:59, Karanbir Singh<mail-lists at karan.org> wrote:
>>> On 10/14/2010 07:48 AM, Tom Bishop wrote:
>>>> I think xen is still on top in terms of performance and features....now
>>> that is indeed what it 'feels' like, but I'm quite keen on putting some
>>> numbers on that.
>> I have done some testing some time ago on one of the EQ machines that
>> I got from hetzner.de. Full spec of the machine was as following:
>> * Intel® Core??? i7-920
>> * 8 GB DDR3 RAM
>> * 2 x 750 GB SATA-II HDD
>> It's nothing big but even though results are quite interesting. All
>> tests were performed on CentOS 5.5 x86_64 with PostgreSQL 8.4 (from
>> CentOS repos).
> Note that 64bit Xen guests should be HVM, not PV, for best performance.
> Xen HVM guests obviously still need to have PV-on-HVM drivers installed.
> 32bit Xen guests can be PV.
Hm, why would HVM be faster than PV for 64 bit guests?
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