Re: [Xen-devel] Statistics at the host for network nic that was PCI-Passthrough

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Mon, 2014-04-14 at 12:32 +0300, Shimon Zadok wrote:
> 
> -------- Original Message --------
> Subject: Re: [Xen-devel] Statistics at the host for network nic that 
> was PCI-Passthrough
> Date: 14-04-2014 12:30
>  From: Shimon Zadok <shimonz@xxxxxxxxxxxxx>
> To: Ian Campbell <Ian.Campbell@xxxxxxxxxx>
> 
> Is it possible to write an extension to pciback to load a module 
> specific to that h/w?
> It could be a new driver for that hardware that operates by itself for 
> reading these statistics from the nic...

Then you would have uncoordinated accesses to the hardware from two
domains. That might work for some hardware I suppose but it certainly
isn't a good idea in general.

You'd be better off building something in the domu to export the stats
e.g. via xenstore. It could be entirely userspace I expect.

Ian.



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