Re: [Xen-users] Issue with domU RX throughput

[Shoban <shoban.preeth@xxxxxxxxx>]

Nevermind. The issue seemed to be with the switch, and its
flow-control mechanism.

Thanks,
Shoban

On Mon, Sep 10, 2012 at 5:36 PM, Shoban <shoban.preeth@xxxxxxxxx> wrote:
> Hi,
>
> I am encountering a weird issue, where domU RX throughput (of traffic from
> another machine) is very low. But domU RX throughput from dom0 is fine,
> and dom0 RX from another machine is fine. iperf reported the following
> throughputs:
>
> dom0 <- outside -- 942Mbps
> domU <- dom0 -- 3467Mbps
> domU <- outside -- 87Mbps
>
> The NIC on the machine is 1GE.
>
> What puzzles me is, some instances of domU (with same config) is able to
> achieve almost 1Gbps RX throughput. And this seem to be very random.
>
> I am running Debian stable (Squeeze) with standard Xen packages,
> and standard network setup with linux bridging module. NIC is Broadcomm
> BCM5764M GE.
>
> Please let me know, if more information on configuration/tests is required.
>
> Thanks,
> Shoban

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