poor performance between two dom-u's on a single dom-0

[LoD MoD]

We are running bandwidth tests between two dom-u's on a single dom-0
using iperf and getting poor performance.
This is using teh xen paravirtualized driver. Performance is around 10-100Mbps.
Any suggestions as to why the performance may be so bad or
recommendations of what to check?

Thanks.

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[Fajar A. Nugraha-3]

On Tue, Nov 3, 2009 at 8:29 AM, LoD MoD <lodmod.dod@...> wrote:
> We are running bandwidth tests between two dom-u's on a single dom-0
> using iperf and getting poor performance.
> This is using teh xen paravirtualized driver.

PV guest or HVM guest with PV drivers? What OS/distro on dom0 and
domU? Which xen and kernel version?

> Performance is around 10-100Mbps.
> Any suggestions as to why the performance may be so bad or
> recommendations of what to check?

Short answer: assuming you use newer pv_ops kernel, then its a known
issue. If you don't use pv_ops kernel, then you need to provide more
details about your setup.

--
Fajar

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