Artur Baruchi
2007-Dec-01 18:08 UTC
[Xen-users] Gigabit Interface - XEN Full Virtualization
Hi Guys,
I installed a full virtual machine, and its using a eth1 bridge.
Well... in my real machine, this eth1 is a gigabit interface, as u can
see:
[root@athlonam2 CONF]# ethtool peth1
Settings for peth1:
Supported ports: [ MII ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Supports auto-negotiation: Yes
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Advertised auto-negotiation: Yes
Speed: 1000Mb/s
Duplex: Full
Port: MII
PHYAD: 1
Transceiver: external
Auto-negotiation: on
Supports Wake-on: g
Wake-on: d
Link detected: yes
I noted that the lspci output are different, and I would like to know,
how can I make my xen virtual machine see the same Hardware, so I can
force a 1000 Full speed.
REAL:
[root@athlonam2 CONF]# lspci | grep -i ether
04:08.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8169
Gigabit Ethernet (rev 10)
VIRTUAL:
[root@linuxxen01 ~]# lspci | grep -i ether
00:04.0 Ethernet controller: Realtek Semiconductor Co., Ltd.
RTL-8139/8139C/8139C+ (rev 20)
Thanks,
Att.
Artur Baruchi
_______________________________________________
Xen-users mailing list
Xen-users@lists.xensource.com
http://lists.xensource.com/xen-users
Sadique Puthen
2007-Dec-01 18:18 UTC
Re: [Xen-users] Gigabit Interface - XEN Full Virtualization
Artur Baruchi wrote:> Hi Guys, > > I installed a full virtual machine, and its using a eth1 bridge. > Well... in my real machine, this eth1 is a gigabit interface, as u can > see: > > [root@athlonam2 CONF]# ethtool peth1 > Settings for peth1: > Supported ports: [ MII ] > Supported link modes: 10baseT/Half 10baseT/Full > 100baseT/Half 100baseT/Full > 1000baseT/Full > Supports auto-negotiation: Yes > Advertised link modes: 10baseT/Half 10baseT/Full > 100baseT/Half 100baseT/Full > 1000baseT/Full > Advertised auto-negotiation: Yes > Speed: 1000Mb/s > Duplex: Full > Port: MII > PHYAD: 1 > Transceiver: external > Auto-negotiation: on > Supports Wake-on: g > Wake-on: d > Link detected: yes > > I noted that the lspci output are different, and I would like to know, > how can I make my xen virtual machine see the same Hardware, so I can > force a 1000 Full speed. >You can''t get Gigabit speed for your NIC in HVM. Whatever network cards you have on the physical system, it''s emulated as a 10/100 mbps Realtek card to the HVM. Use paravirtualized drivers for HVMs to enhance the network card performance and throughput, but don''t expect 1000 mbps. :-) --Sadique> REAL: > [root@athlonam2 CONF]# lspci | grep -i ether > 04:08.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8169 > Gigabit Ethernet (rev 10) > > VIRTUAL: > [root@linuxxen01 ~]# lspci | grep -i ether > 00:04.0 Ethernet controller: Realtek Semiconductor Co., Ltd. > RTL-8139/8139C/8139C+ (rev 20) > > Thanks, > > Att. > Artur Baruchi > > _______________________________________________ > 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
Mark Williamson
2007-Dec-02 02:34 UTC
Re: [Xen-users] Gigabit Interface - XEN Full Virtualization
> > I noted that the lspci output are different, and I would like to know, > > how can I make my xen virtual machine see the same Hardware, so I can > > force a 1000 Full speed. > > You can''t get Gigabit speed for your NIC in HVM. Whatever network cards > you have on the physical system, it''s emulated as a 10/100 mbps Realtek > card to the HVM. > > Use paravirtualized drivers for HVMs to enhance the network card > performance and throughput, but don''t expect 1000 mbps. :-)The virtual machine won''t have hardware matching the physical system; it just sees whatever hardware Xen is emulating. Xen doesn''t emulate a GigE network card so you won''t be able to see one in the guest. However, I suspect that the 10/100mbps card will be able to transmit above that speed if your machine can emulate the card fast enough: because there''s not a real hardware 100mbps ethernet card there, there actually shouldn''t be anything limiting the speed to that. As Sadique mentioned, if you use paravirtualised drivers in your guest (either by using a PV guest or by installing paravirt network drivers in an HVM guest) you could potentially increase the throughput and decrease the CPU overhead further. Cheers, Mark -- Dave: Just a question. What use is a unicyle with no seat? And no pedals! Mark: To answer a question with a question: What use is a skateboard? Dave: Skateboards have wheels. Mark: My wheel has a wheel! _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Artur Baruchi
2007-Dec-02 11:04 UTC
Re: [Xen-users] Gigabit Interface - XEN Full Virtualization
Hi Mark, Unfortunately, I did some tests, and even my nic being a giga and my lan supporting giga, my full virtualized domain wasnt able to pass 100Mb/sec. My paravirtualized guests had a very good performance in this environment. Thanks, Att. Artur Baruchi On Dec 2, 2007 12:34 AM, Mark Williamson <mark.williamson@cl.cam.ac.uk> wrote:> > > I noted that the lspci output are different, and I would like to know, > > > how can I make my xen virtual machine see the same Hardware, so I can > > > force a 1000 Full speed. > > > > You can''t get Gigabit speed for your NIC in HVM. Whatever network cards > > you have on the physical system, it''s emulated as a 10/100 mbps Realtek > > card to the HVM. > > > > Use paravirtualized drivers for HVMs to enhance the network card > > performance and throughput, but don''t expect 1000 mbps. :-) > > The virtual machine won''t have hardware matching the physical system; it just > sees whatever hardware Xen is emulating. > > Xen doesn''t emulate a GigE network card so you won''t be able to see one in the > guest. However, I suspect that the 10/100mbps card will be able to transmit > above that speed if your machine can emulate the card fast enough: because > there''s not a real hardware 100mbps ethernet card there, there actually > shouldn''t be anything limiting the speed to that. > > As Sadique mentioned, if you use paravirtualised drivers in your guest (either > by using a PV guest or by installing paravirt network drivers in an HVM > guest) you could potentially increase the throughput and decrease the CPU > overhead further. > > Cheers, > Mark > > -- > Dave: Just a question. What use is a unicyle with no seat? And no pedals! > Mark: To answer a question with a question: What use is a skateboard? > Dave: Skateboards have wheels. > Mark: My wheel has a wheel! >_______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Riccardo Veraldi
2007-Dec-02 16:08 UTC
Re: [Xen-users] Gigabit Interface - XEN Full Virtualization
if you compile the netfront drivers on your guest kernel and load them as kernel module on your guests, you will have gigabit speed on a fully virtualized virtual machine, hust use netfront and not ioemu then load the kernel drivers on the virtual machine. I have written something about it but it is in italian. If you understand italian... https://calcolo.infn.it/wiki/doku.php?id=network_overbust_compilare_e_installare_il_kernel_module_con_il_supporto_netfront you should understand the way to do it even if it is written in italian. I can translate in english if really it is needed Riccardo Artur Baruchi ha scritto:> Hi Mark, > > Unfortunately, I did some tests, and even my nic being a giga and my > lan supporting giga, my full virtualized domain wasnt able to pass > 100Mb/sec. My paravirtualized guests had a very good performance in > this environment. > > Thanks, > > Att. > Artur Baruchi > > > On Dec 2, 2007 12:34 AM, Mark Williamson <mark.williamson@cl.cam.ac.uk> wrote: > >>>> I noted that the lspci output are different, and I would like to know, >>>> how can I make my xen virtual machine see the same Hardware, so I can >>>> force a 1000 Full speed. >>>> >>> You can''t get Gigabit speed for your NIC in HVM. Whatever network cards >>> you have on the physical system, it''s emulated as a 10/100 mbps Realtek >>> card to the HVM. >>> >>> Use paravirtualized drivers for HVMs to enhance the network card >>> performance and throughput, but don''t expect 1000 mbps. :-) >>> >> The virtual machine won''t have hardware matching the physical system; it just >> sees whatever hardware Xen is emulating. >> >> Xen doesn''t emulate a GigE network card so you won''t be able to see one in the >> guest. However, I suspect that the 10/100mbps card will be able to transmit >> above that speed if your machine can emulate the card fast enough: because >> there''s not a real hardware 100mbps ethernet card there, there actually >> shouldn''t be anything limiting the speed to that. >> >> As Sadique mentioned, if you use paravirtualised drivers in your guest (either >> by using a PV guest or by installing paravirt network drivers in an HVM >> guest) you could potentially increase the throughput and decrease the CPU >> overhead further. >> >> Cheers, >> Mark >> >> -- >> Dave: Just a question. What use is a unicyle with no seat? And no pedals! >> Mark: To answer a question with a question: What use is a skateboard? >> Dave: Skateboards have wheels. >> Mark: My wheel has a wheel! >> >> > > _______________________________________________ > 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
Emre Erenoglu
2007-Dec-02 19:07 UTC
Re: [Xen-users] Gigabit Interface - XEN Full Virtualization
Hi Riccardo, I tried to understand how you do it. I''m also trying to use my HVM domU with PV drivers. If I understand right, the important point is: - use the source code of the XEN in the Dom0 (don''t download from Xensource etc.). Is it true? So, for example, if I''m using Fedora 8 as my Dom0, I have to download the source rpm of the xen-hypervisor that''s running in Fedora 8. then go inside the unmodified_drivers and do the compilation. right? I did like this for my system, unfortunately, either the system crashes completely or network stops working after some time... I guess there''s a bug somewhere. For example, when unloading the xen-vnif module, I receive an error in dmesg talking about some "memory leak". Br, Emre On Dec 2, 2007 5:08 PM, Riccardo Veraldi <Riccardo.Veraldi@cnaf.infn.it> wrote:> > if you compile the netfront drivers on your guest kernel and load them > as kernel module on your guests, you will have gigabit speed on a fully > virtualized > virtual machine, hust use netfront and not ioemu then load > the kernel drivers on the virtual machine. > I have written something about it but it is in italian. > If you understand italian... > > > https://calcolo.infn.it/wiki/doku.php?id=network_overbust_compilare_e_installare_il_kernel_module_con_il_supporto_netfront > > you should understand the way to do it even if it is written in italian. > > I can translate in english if really it is needed > > Riccardo > > > > Artur Baruchi ha scritto: > > Hi Mark, > > > > Unfortunately, I did some tests, and even my nic being a giga and my > > lan supporting giga, my full virtualized domain wasnt able to pass > > 100Mb/sec. My paravirtualized guests had a very good performance in > > this environment. > > > > Thanks, > > > > Att. > > Artur Baruchi > > > > > > On Dec 2, 2007 12:34 AM, Mark Williamson <mark.williamson@cl.cam.ac.uk> > wrote: > > > >>>> I noted that the lspci output are different, and I would like to > know, > >>>> how can I make my xen virtual machine see the same Hardware, so I can > >>>> force a 1000 Full speed. > >>>> > >>> You can''t get Gigabit speed for your NIC in HVM. Whatever network > cards > >>> you have on the physical system, it''s emulated as a 10/100 mbps > Realtek > >>> card to the HVM. > >>> > >>> Use paravirtualized drivers for HVMs to enhance the network card > >>> performance and throughput, but don''t expect 1000 mbps. :-) > >>> > >> The virtual machine won''t have hardware matching the physical system; > it just > >> sees whatever hardware Xen is emulating. > >> > >> Xen doesn''t emulate a GigE network card so you won''t be able to see one > in the > >> guest. However, I suspect that the 10/100mbps card will be able to > transmit > >> above that speed if your machine can emulate the card fast enough: > because > >> there''s not a real hardware 100mbps ethernet card there, there actually > >> shouldn''t be anything limiting the speed to that. > >> > >> As Sadique mentioned, if you use paravirtualised drivers in your guest > (either > >> by using a PV guest or by installing paravirt network drivers in an HVM > >> guest) you could potentially increase the throughput and decrease the > CPU > >> overhead further. > >> > >> Cheers, > >> Mark > >> > >> -- > >> Dave: Just a question. What use is a unicyle with no seat? And no > pedals! > >> Mark: To answer a question with a question: What use is a skateboard? > >> Dave: Skateboards have wheels. > >> Mark: My wheel has a wheel! > >> > >> > > > > _______________________________________________ > > 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 >-- Emre Erenoglu erenoglu@gmail.com _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Riccardo Veraldi
2007-Dec-02 19:16 UTC
Re: [Xen-users] Gigabit Interface - XEN Full Virtualization
No, I mean YOU MUST do it on the domU not on the dom0. The domU must load the unmodified compiled drivers from the xen fedora distribution src rpm that yuo compiled by hand. The dom0 is unaffected by this procedure. So get the xen source rpm according to your domU distribution, compile the unmodifided drivers on the domU and load the kernel module. remember depmod -a to register the new installed modules Riccardo Emre Erenoglu ha scritto:> Hi Riccardo, I tried to understand how you do it. I''m also trying to > use my HVM domU with PV drivers. If I understand right, the important > point is: > > - use the source code of the XEN in the Dom0 (don''t download from > Xensource etc.). Is it true? > > So, for example, if I''m using Fedora 8 as my Dom0, I have to download > the source rpm of the xen-hypervisor that''s running in Fedora 8. then > go inside the unmodified_drivers and do the compilation. right? > > I did like this for my system, unfortunately, either the system > crashes completely or network stops working after some time... I guess > there''s a bug somewhere. For example, when unloading the xen-vnif > module, I receive an error in dmesg talking about some "memory leak". > > Br, > > Emre > > On Dec 2, 2007 5:08 PM, Riccardo Veraldi > <Riccardo.Veraldi@cnaf.infn.it <mailto:Riccardo.Veraldi@cnaf.infn.it>> > wrote: > > > if you compile the netfront drivers on your guest kernel and load them > as kernel module on your guests, you will have gigabit speed on a > fully > virtualized > virtual machine, hust use netfront and not ioemu then load > the kernel drivers on the virtual machine. > I have written something about it but it is in italian. > If you understand italian... > > https://calcolo.infn.it/wiki/doku.php?id=network_overbust_compilare_e_installare_il_kernel_module_con_il_supporto_netfront > > you should understand the way to do it even if it is written in > italian. > > I can translate in english if really it is needed > > Riccardo > > > > Artur Baruchi ha scritto: > > Hi Mark, > > > > Unfortunately, I did some tests, and even my nic being a giga and my > > lan supporting giga, my full virtualized domain wasnt able to pass > > 100Mb/sec. My paravirtualized guests had a very good performance in > > this environment. > > > > Thanks, > > > > Att. > > Artur Baruchi > > > > > > On Dec 2, 2007 12:34 AM, Mark Williamson < > mark.williamson@cl.cam.ac.uk > <mailto:mark.williamson@cl.cam.ac.uk>> wrote: > > > >>>> I noted that the lspci output are different, and I would like > to know, > >>>> how can I make my xen virtual machine see the same Hardware, > so I can > >>>> force a 1000 Full speed. > >>>> > >>> You can''t get Gigabit speed for your NIC in HVM. Whatever > network cards > >>> you have on the physical system, it''s emulated as a 10/100 > mbps Realtek > >>> card to the HVM. > >>> > >>> Use paravirtualized drivers for HVMs to enhance the network card > >>> performance and throughput, but don''t expect 1000 mbps. :-) > >>> > >> The virtual machine won''t have hardware matching the physical > system; it just > >> sees whatever hardware Xen is emulating. > >> > >> Xen doesn''t emulate a GigE network card so you won''t be able to > see one in the > >> guest. However, I suspect that the 10/100mbps card will be > able to transmit > >> above that speed if your machine can emulate the card fast > enough: because > >> there''s not a real hardware 100mbps ethernet card there, there > actually > >> shouldn''t be anything limiting the speed to that. > >> > >> As Sadique mentioned, if you use paravirtualised drivers in > your guest (either > >> by using a PV guest or by installing paravirt network drivers > in an HVM > >> guest) you could potentially increase the throughput and > decrease the CPU > >> overhead further. > >> > >> Cheers, > >> Mark > >> > >> -- > >> Dave: Just a question. What use is a unicyle with no seat? And > no pedals! > >> Mark: To answer a question with a question: What use is a > skateboard? > >> Dave: Skateboards have wheels. > >> Mark: My wheel has a wheel! > >> > >> > > > > _______________________________________________ > > Xen-users mailing list > > Xen-users@lists.xensource.com <mailto:Xen-users@lists.xensource.com> > > http://lists.xensource.com/xen-users > <http://lists.xensource.com/xen-users> > > > > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xensource.com <mailto:Xen-users@lists.xensource.com> > http://lists.xensource.com/xen-users > > > > > -- > Emre Erenoglu > erenoglu@gmail.com <mailto:erenoglu@gmail.com>_______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users