Re: [Qemu-devel] [RFC PATCH V2 00/10] Qemu: Add live migration support for SRIOV NIC

[Michael S. Tsirkin]

On Fri, Dec 04, 2015 at 02:42:36PM +0800, Lan, Tianyu wrote:
> 
> On 12/2/2015 10:31 PM, Michael S. Tsirkin wrote:
> >>>We hope
> >>>to find a better way to make SRIOV NIC work in these cases and this is
> >>>worth to do since SRIOV NIC provides better network performance compared
> >>>with PV NIC.
> >If this is a performance optimization as the above implies,
> >you need to include some numbers, and document how did
> >you implement the switch and how did you measure the performance.
> >
> 
> OK. Some ideas of my patches come from paper "CompSC: Live Migration with
> Pass-through Devices".
> http://www.cl.cam.ac.uk/research/srg/netos/vee_2012/papers/p109.pdf
> 
> It compared performance data between the solution of switching PV and VF and
> VF migration.(Chapter 7: Discussion)
> 

I haven't read it, but I would like to note you can't rely on research
papers.  If you propose a patch to be merged you need to measure what is
its actual effect on modern linux at the end of 2015.

> >>>Current patches have some issues. I think we can find
> >>>solution for them andimprove them step by step.