[Xen-devel] Re: Network buffering of remus

[Frank Pan <frankpzh@xxxxxxxxx>]

On Tue, Aug 24, 2010 at 12:39 AM, Brendan Cully <brendan@xxxxxxxxx> wrote:

> You'll probably want to test with something a bit more systematic than
> ping. If ping sends a packet to the protected machine just before the
> end of an epoch, the response won't be buffered very long at all. On
> the other hand, if ping sends its packet at the start of an epoch, the
> response will be delayed for the entire epoch length. By default, ping
> sends packets infrequently, and the delay between pings isn't
> particularly rigid, so you'll get jumpy results with it.
>

Thanks for reply.

After some debugging I found the buffering is not working. I use an
hvm guest with qemu-simulated NIC, the active interface is tapX.0, not
vifX.0.
I've modified remus code, replace "vif%d.0" with "tap%d.0", but it
does not work. Do you know how to make it working?

I also tried pv NIC on hvm, but it seems remus does not support
"PV-on-HVM" guest. Is it hard to do, if I want to add this feature?
Can you give me some advices?

Thanks.

-- 
Frank Pan

Computer Science and Technology
Tsinghua University

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