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Re: High packet loss in netbsd-5.0 domU

On 23/04/2009 8:51 PM, Anup Patil wrote:
On Tue, 2009-04-21 at 21:59 +0200, Manuel Bouyer wrote:
What network test ? who is sending the datagram and who is receiving them ?
Did you check that the dom0 can handle the network load ? What OS is
the dom0 running ?

Dom0 is linux-, built from the xen sources.
The sender and receiver is iperf
( http://sourceforge.net/projects/iperf/)

Receiver is  connected to the dom0 by a 100 Mb/s switch, and cpu load in
dom0 seems to be all right as other domU's (linux 2.18.8 ) perform

So the scenario is a NetBSD domu sending out via a linux dom0 bridge? Receiver is _another box_ connected via 100Mbps?

And the linux domu operate faultlessly with this test? That would be a crucial piece of info to isolate the issue.

Have you performed the same test from dom0?

It's highly possible it's how NetBSD operates under a linux dom0 but more specific info is needed. Have you tried current? It's possible it's been fixed and if it has, this would be a definitive test.

This is something I'm sure they'd like to fix in 5-RC if it's not working, especially if it's already been fixed :) ... A release with incompatible domu kernels for the current supported version of xen isn't ideal.


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