RE: [Xen-users] Bad network performance between VMs in a domain.

["Petersson, Mats" <Mats.Petersson@xxxxxxx>]

> -----Original Message-----
> From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx 
> [mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of 
> zvoice@xxxxxxx
> Sent: 18 April 2007 12:13
> To: xen-users@xxxxxxxxxxxxxxxxxxx
> Subject: RE: [Xen-users] Bad network performance between VMs 
> in a domain.
> 
> In my next message i ll give you to your questions, but i 
> think the problem is when the packet comes from vif to bridge 
> and then from bridge to another vif. But what is strange, 
> that packets that pass through the vif to eth0 it goes with 
> the maximum speed, but when this packet is to be transmitted 
> from 1 vif to another in one vif it happens slowly.

I don't see any reason why this should be. VIF to VIF should be as fast as VIF 
to Eth (if not faster). But there are so many factors that influence this, and 
CPU-starvation, interrupt latency are just a few factors. 

--
Mats
> исходное сообщение
> Тема: RE: [Xen-users] Bad network performance between VMs in a domain.
> От:   zvoice@xxxxxxx
> Дата:         18.04.2007 10.01
> 
> I have got xen 3.0.3 and guests are in PVM
> 
> исходное сообщение
> Тема: [Xen-users] Bad network performance between VMs in a domain.
> От:   zvoice@xxxxxxx
> Дата:         18.04.2007 08.24
> 
> Hi!
> I have got this problem aching in my head. The speed between 
> my VM and 
> external machine is about 900Mb/s, but the speed between 2 
> VMs in one bridge 
> is just about 20 Mb/s. What can i do with this? Please, help me out.
> I ve got a standart Xen configuration(bridge).
> Thanks.  
> 
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