Re: Hardware friendly proposals from Intel for packed-ring-layout

[Tiwei Bie <tiwei.bie@intel.com>]

On Thu, Aug 24, 2017 at 05:05:05PM +0300, Michael S. Tsirkin wrote:
> On Thu, Aug 24, 2017 at 07:53:15PM +0800, Tiwei Bie wrote:
> > Indirect Chaining
> > =================
> > 
> > ## Current proposal
> > 
> > * Indirect chaining is an optional feature
> > 
> > ## New proposal
> > 
> > * Remove this feature from this new ring layout
> > 
> > It's very unlikely that hardware implementations would support this
> > due to extra latency of fetching actual descriptors.
> > 
> > This is a totally new ring layout, and we don't need to worry about the
> > compatibility issues with the old one. So it's better to not include this
> > feature in this new ring layout if we can't find it's necessary now.
> 
> Some form of indirect is really useful for software - as we have
> unbounded latencies we really benefit from very deep queues.
> 

Cool. Let's just keep it. :-)

Best regards,
Tiwei Bie