Kelven Yang
2009-Jun-19 18:49 UTC
[Xen-users] Performance question on 32-bit HVM DomU vs 64-bit HVM DomU on top of 64-bit Xen Hypervisor
Hello, I''m now doing some network performance testing on running Windows XP on top of a 64-bit Xen Hypervisor, I compared the performance results on a 32-bit Windows XP and a 64-bit Windows XP (both are running as a HVM guest on 64-bit Xen Hypervisor), I found that with a 32-bit windows XP, it performs much slower than 64-bit windows XP, could anyone explain the reason of it? Thanks in advance Kelven _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Kelven Yang
2009-Jun-19 21:53 UTC
RE: [Xen-users] Performance question on 32-bit HVM DomU vs 64-bit HVM DomU on top of 64-bit Xen Hypervisor
Hi Evgeniy, Thanks for the reply. I used Netperf (ftp://ftp.cup.hp.com/dist/networking/benchmarks/netperf/netperf-2.4.1.tar.gz) as the testing tool. Here is my test configuration . CentOS 5.2 with Xen 3.3.0 64-bit Hypervisor . 32-bit Windows XP HVM guest with PV drivers . 32-bit Windows XP HVM guest with PV drivers . 64-bit Windows XP Pro HVM guest . 62-bit Federa10 PV guest . 32-bit CentOS 5.2 PV guest . 1Gbits/second network Network throughput on 32/64 bit PV guests are almost the same, but 32-bit Windows HVM performed far slower than its 64-bit counterpart. About 930 mbits/second on 32/64 bit PV guests About 140 mbits/second on 64-bit Windows XP HVM guest About 30 mbits/second on 32-bit Windows XP HVM guest with PV drivers About 15 mbits/second on 32-bit Windows XP HVM guest without PV drivers Kelven -----Original Message----- From: Evgeniy Sudyr [mailto:eject.in.ua@gmail.com] Sent: Friday, June 19, 2009 2:07 PM To: Kelven Yang Subject: Re: [Xen-users] Performance question on 32-bit HVM DomU vs 64-bit HVM DomU on top of 64-bit Xen Hypervisor Kelven, How you compared performance, what benchmarking tools you used? If you ean GUI speed ... - following my experience you can note that you used not only different architecture of same OS - you used a bit different OS which means - other kernel, other drivers(which may be performance issue), other updates installed, and main performance issue for windows is list of installed/running programs/services. In my opinion it's impossible to say - I have same , but 32 vs 64 ... I guess that problem somewhere deep inside config. P.S. I'm not Xen expert , this is my minds. I'm interest for answer from more experienced Xen guys and their answers/explanations. -- Thanks! Evgeniy Sudyr http://www.eject.name On Fri, Jun 19, 2009 at 9:49 PM, Kelven Yang<kelven@vmops.com> wrote:> Hello, > > > > I’m now doing some network performance testing on running Windows XP on top > of a 64-bit Xen Hypervisor, I compared the performance results on a 32-bit > Windows XP and a 64-bit Windows XP (both are running as a HVM guest on > 64-bit Xen Hypervisor), I found that with a 32-bit windows XP, it performs > much slower than 64-bit windows XP, could anyone explain the reason of it? > > > > Thanks in advance > > Kelven > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xensource.com > http://lists.xensource.com/xen-users >_______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users