Re: [Xen-users] Re: [Xen-devel] Release 0.8.5 of GPL PV drivers forWindows

[Tom Brown <xensource.com@xxxxxxxxxxxxxxxxxxx>]

> Isn't these 100 mbps or 1000 mbps speeds funny numbers for today's CPU
> power? I mean, somewhere in the design, there's something wrong that forces
> us to make possibly too many context switches between DomU, Hypervisor and
> Dom0. ???
>
> Emre
what, something like the 1500 byte maximum transmission unit (MTU) from 
back in the days when 10 MILLION bits per second was so insanely fast we 
connected everything to the same cable!? (remember 1200 baud modems?) Yes, 
there might be some "design" decisions that don't work all that well 
today.
AFAIK, XEN can't do oversize (jumbo) frames, that would be a big help for 
a lot of things (iSCSI, ATAoE, local network )... but even so, AFAIK it 
would only be a relatively small improvement (jumbo frames only going up 
to about 8k AFAIK).
-Tom

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tbrown@xxxxxxxxxxxxx   | Courage is doing what you're afraid to do.
http://BareMetal.com/  | There can be no courage unless you're scared.
                       | - Eddie Rickenbacker

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