On 3/19/2021 4:59 PM, Wan, Kaike wrote:
From: Jason Gunthorpe <jgg@xxxxxxxxxx>
Sent: Friday, March 19, 2021 4:55 PM
To: Rimmer, Todd <todd.rimmer@xxxxxxxxx>
Cc: Dennis Dalessandro <dennis.dalessandro@xxxxxxxxxxxxxxxxxxxx>; Wan,
Oh, there is lots of stuff in UCX, I'm not surprised you similarities to what
PSM did since psm/libfabric/ucx are all solving the same problems.
rv seems to completely destroy alot of the HPC performance offloads
that vendors are layering on RC QPs
Different vendors have different approaches to performance and chose
different design trade-offs.
That isn't my point, by limiting the usability you also restrict the drivers where
this would meaningfully be useful.
So far we now know that it is not useful for mlx5 or hfi1, that leaves only hns
unknown and still in the HPC arena.
[Wan, Kaike] Incorrect. The rv module works with hfi1.
Interesting. I was thinking the opposite. So what's the benefit? When
would someone want to do that?
-Denny
