[ofa-general] Re: [PATCH] mlx4: increase max outstanding rdma reads per qp

[Tziporet Koren]

Roland Dreier wrote:
>  > Change max outstanding rdma reads per QP from 4 to 16.
>  > This enables an improvement in latency for rdma-read applications.
>
> This only affects performance if an app queues more than 4 RDMA READ
> requests, right?  (Because the 5th request doesn't have to wait for
> the 1st request to complete before it's sent)
>
> Do we want to increase this for mthca too, or is mlx4 so much faster
> than mthca that we need more requests in flight to keep the pipeline
> full?
>
>   
I suggest we do this in mthca too.

tziporet