[openib-general] How do we prevent starvation say between TCP over IPOIB / and SRP traffic ?

[Caitlin Bestler]

openib-general-bounces at openib.org wrote:
> Some application level protocols - require higher QoS levels than
> others - for various communication and I/O operations.
> 
> For example, cluster inter-node health msgs have fixed
> latency requirements that if exceeded may result in
> unexpected node removals from the cluster.
> 
> Are there any mechanisms available to the client process to
> manage the QoS level for the various supported ULPs
> (SDP,TCP,UDP,RDS,SRP,iSER,etc) either at the ULP level or
> some combination of process and ULP - or perhaps even at the
> connection level ? 
> 
> Using the same example, the cluster node monitors might set
> the priority / QoS level of the heart beats to be more
> important than normal SRP/iSER traffic to ensure no starvation ?
> 
> 

Working up from hardware capabilities and trying to generalize
them probably won't lead anywhere.

Do you have a model of the requirements for transport/device
neutral QP prioritization that would meet your needs?