Re: [Xen-devel] Install paravirtualized drivers after booting for high-performance IO

[Mark Williamson <mark.williamson@xxxxxxxxxxxx>]

Hi there,

I expect you've seen a reference to the Windows support using Vanderpool 
Technology?

The current VT implementation provides an emulation of real hardware devices 
(e.g. an NE2000 ethernet card) to the guest OS.  This has the advantage that 
you can boot an unmodified OS and it'll recognise the emulated devices and 
Just Work.  This will allow you to install the OS using its usual installer 
and get things up and running.

However, you pay a performance price for emulating a device like this.  The 
most straightforward way to solve this is to replace the emulated device 
drivers with Xen-aware drivers (like the ones used by the Xen-native Linux 
port).  Once you've installed the OS, you can upgrade to the Xen device 
drivers.

This should give better bandwidth for things like disk and network IO.

Does that help?

Cheers,
Mark

>     What is "high-performance IO" ?
>     What meaning for "Install paravirtualized drivers after booting for
> high-performance IO"?
>
>     Thanks,

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