Re: [Xen-users] network driver performance

[Muli Ben-Yehuda <muli@xxxxxxxxxx>]

On Thu, Sep 11, 2008 at 02:03:26AM -0700, Kip Macy wrote:

> Does anyone know what the peak numbers are (bandwith, pps, and
> latency) for
> 
> 1) fully virtualized
> 
> 2) para-virtualized (netback)
> 
> 3) VT-d passthrough

Like most everything else, it depends on your setup. The most
important parameter is probably your network: 1GbE or 10GbE? For 1GbE,
as a rule-of-thumb, fully-virtualized can't fill the pipe,
para-virtualized can fill the pipe but has a much higher CPU
utilization than native, and passthrough is pretty close to native in
all parameters, assuming a direct-mapping strategy.

Cheers,
Muli
-- 
Workshop on I/O Virtualization (WIOV '08)
Co-located with OSDI '08, Dec 2008, San Diego, CA
http://www.usenix.org/wiov08

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