RE: [Xen-ia64-devel] [PATCH] Add event callback for xen/ia64

[Alex Williamson <alex.williamson@xxxxxx>]

On Wed, 2006-04-12 at 10:49 +0800, Tian, Kevin wrote:

> OK, thanks for info. I'm currently building the tree and will test soon.
> BTW, do you have any extra steps beside normal flow to setup the 
> network for domU?

   For me it was simply commenting out the vif = [ '' ] line in my
config file.  Then when I run xend start (it takes longer) and sets up a
bridge and a few other network device.  domU boots up, sees an eth0
device and it's configurable via dhcp.

> Another side question I'm curious is, how about the bandwidth of 
> your physical NIC? Is 10M an acceptable data to you regarding 
> Isaku's p2m patch, which may reveal us the space for improvement
> later? :-)

   The testing I've done has not been 100% scientific.  I'm not on an
isolated network and the server I'm pulling from is not dedicated for
this testing.  I'm currently seeing ~95MB/s for the same test from dom0
while domU is still getting ~10MB/s.  The bridge driver in dom0 is
taking a some unaligned accesses, which may or may not be a significant
factor for throughput.  It's possible I'm only seeing a few of them
because of the printk rate limited in the unaligned code.  Thanks,

        Alex

-- 
Alex Williamson                             HP Linux & Open Source Lab


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