[openib-general] Re: IPoIB Path Static Rate

[Fab Tillier]

> From: Roland Dreier [mailto:roland at topspin.com]
> Sent: Saturday, December 18, 2004 7:47 AM
> 
> I don't object in principle to doing this right, it just seems like a
> fair bit of work to write code to retrieve the local PortInfo to get
> the active link speed and link width so that we can calculate our
> local rate and get the right IPD.
> 
> To solve this, do you think it makes sense to add the active link
> speed and link width to struct ib_port_attr so that it's easy for ULPs
> to get them?  Otherwise ULPs would have to do their own PortInfo queries.
> 

Why not just let clients specify the static rate in the AV, rather than the
IPD, and have the HCA driver figure out the right IPD based on information
it can easily cache?

- Fab