HI, I have been stuck by this problem for the whole week. We just did a simple experiment to test the network performance in xen use the benchmark--iperf. Our NIC is Gigabit, and we got exactly correct data in hostOS--fedoral core 8 without xen running, the bandwidth of the network was 931Mbps. But the problem is, when we start guest OS--fedoral core 8, and running iperf on it, we got data only 48Mbps! The data is same as that used 100M NIC. Can you tell me, are there some restrictions in xen when use Gigabit NIC? Or should we do some configuration to use it? Maybe I miss some configurations or make some mistakens. Thanks for looking. Regards, Sharon 2008-05-07 juzi0730 _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
On Wed, May 07, 2008 at 03:59:07PM +0800, juzi0730 wrote:> We just did a simple experiment to test the network performance in xen > use the benchmark--iperf. Our NIC is Gigabit, and we got exactly > correct data in hostOS--fedoral core 8 without xen running, the > bandwidth of the network was 931Mbps. But the problem is, when we > start guest OS--fedoral core 8, and running iperf on it, we got data > only 48Mbps! The data is same as that used 100M NIC.So you ran your benchmark within the domU? Rainer _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
On Wed, May 07, 2008 at 04:20:42PM +0800, juzi0730 wrote:> yes we ran our benchmark in the domU, and got incorrect data. > thanks for your looking.IIRC, the opensource version of XEN supports 100MBit only, if you want gigabit, you''ll have to buy the commercial version. (If I''m wrong, can someone please correct me?) And Sharon, please reply to the list. Rainer _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Rainer Sokoll wrote:> On Wed, May 07, 2008 at 04:20:42PM +0800, juzi0730 wrote: > > >> yes we ran our benchmark in the domU, and got incorrect data. >> thanks for your looking. >> > > IIRC, the opensource version of XEN supports 100MBit only,This is true only for HVMs without pv drivers. Paravirtualized guests and HVMs with PV drivers should perform better than this on Gigabit ethernet interfaces. What type of guest you using? PV or FV? --Sadique> if you want > gigabit, you''ll have to buy the commercial version. (If I''m wrong, can > someone please correct me?) > And Sharon, please reply to the list. > > Rainer > > _______________________________________________ > 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
HI, is it true that the opensource version of XEN supports 100MBit only? I'm so sorry to hear that. and, if I will do the experiment with Gigabit, I have to buy the commercial version? thanks for your looking. Regards, Sharon 2008-05-07 juzi0730 发件人： Rainer Sokoll 发送时间： 2008-05-07 16:40:10 收件人： xen-users@lists.xensource.com 抄送： 主题： Re: Re: [Xen-users] problem about network in Xen! On Wed, May 07, 2008 at 04:20:42PM +0800, juzi0730 wrote:> yes we ran our benchmark in the domU, and got incorrect data. > thanks for your looking.IIRC, the opensource version of XEN supports 100MBit only, if you want gigabit, you'll have to buy the commercial version. (If I'm wrong, can someone please correct me?) And Sharon, please reply to the list. Rainer _______________________________________________ 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
juzi0730 wrote:> HI, > is it true that the opensource version of XEN supports 100MBit only?As I said before in this thread, this only true for hvms without PV drivders since it emulates the 1GB card a 10/100 mbps realtek card. PV guests and HVMs with PV drivers should perform better than this since it''s using an optimized driver for networking. --Sadique> I''m so sorry to hear that. > and, if I will do the experiment with Gigabit, I have to buy the > commercial version? > thanks for your looking. > Regards, > Sharon > 2008-05-07 > ------------------------------------------------------------------------ > juzi0730 > ------------------------------------------------------------------------ > *发件人：* Rainer Sokoll > *发送时间：* 2008-05-07 16:40:10 > *收件人：* xen-users@lists.xensource.com > *抄送：* > *主题：* Re: Re: [Xen-users] problem about network in Xen! > On Wed, May 07, 2008 at 04:20:42PM +0800, juzi0730 wrote: > > yes we ran our benchmark in the domU, and got incorrect data. > > thanks for your looking. > IIRC, the opensource version of XEN supports 100MBit only, if you want > gigabit, you''ll have to buy the commercial version. (If I''m wrong, can > someone please correct me?) > And Sharon, please reply to the list. > Rainer > _______________________________________________ > 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_______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
> HI, > is it true that the opensource version of XEN supports 100MBit only? > I''m so sorry to hear that. > and, if I will do the experiment with Gigabit, I have to buy the commercial version? > thanks for your looking. > > Regards, > Sharon >I have heard that this is the case for HVM but for paravirtualized you can get the gigabit--I know because I am doing that. STeve _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
On Wed, May 7, 2008 at 6:19 AM, Steven Timm <timm@fnal.gov> wrote:> > > > HI, > > is it true that the opensource version of XEN supports 100MBit only? > > I''m so sorry to hear that. > > and, if I will do the experiment with Gigabit, I have to buy the > commercial version? > > thanks for your looking. > > > > Regards, > > Sharon > > > > > I have heard that this is the case for HVM but for paravirtualized > you can get the gigabit--I know because I am doing that. > > STeve > >Did you test the same machine with iperf on a non-xen kernel? If you don''t have one installed, you could even use a live CD. Todd> > > _______________________________________________ > 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