Re: [Xen-users] Gigabit Interface - XEN Full Virtualization

[Sadique Puthen <sputhenp@xxxxxxxxxx>]

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@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-users
>
>   

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