RE: [Xen-users] GPLPV network performance

["Robert Dunkley" <Robert@xxxxxxxxx>]

I only get 155Mbit/sec DomU to DomU regardless of driver settings. CPU on 
Server hits 100%, client runs at 33%. System is Opteron 8350 based, one fixed 
CPU core per VM on Xen 3.3.0/Centos 5.2, Pre13 GPLPV, CPUID fix applied. 
Turning on Receive moderation make the score worse. Do the GPLPV drivers still 
have general performance issues with Xen 3.3.0 or is this just my setup?

Thanks

Rob

-----Original Message-----
From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx 
[mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Fajar A. Nugraha
Sent: 19 January 2009 09:27
To: xen-users
Subject: Re: [Xen-users] GPLPV network performance

Grant McWilliams wrote:
> On Sun, Jan 18, 2009 at 9:26 PM, Fajar A. Nugraha <fajar@xxxxxxxxx 
> <mailto:fajar@xxxxxxxxx>> wrote:
>
>     I tested again using:
>     - Xeon X5450 @3GHz (same machine as earlier test), W2k3, single CPU,
>     ACPI -> iperf = 1.4 Gbps
>     - Opteron 2220 SE @2.8 GHz, W2k3, single CPU, ACPI -> iperf = 1 
> Gbps
>
>
> I'd be curious about DomU to DomU performance. Nobody seems to test 
> this very often but if you have a database server or file server in a 
> DomU that's serving out to another then DomU to DomU performance would 
> be critical.
>
>

Hmm.
I just tested domU <-> domU on the same Xeon dom0 (same config as above), and 
got 530 Mbps. The domU that functions as iperf server uses 100% CPU from xm top 
(both domUs are using different physical CPU).

Oh well, at least it's well above 100 Mbps.

Regards,

Fajar

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