[ofa-general] IPOIB/CM increase retry counts

[Or Gerlitz]

Sean Hefty wrote:
> IMO, the fact that TCP implements reliability doesn't mean it's unnecessary in
> underlying layers.  For example, wireless typically adds reliability at the link
> layer because the link itself is so unreliable.  If adding in reliability in the
> underlying layers improves overall performance, then it makes sense to add it,
> independent of the upper level protocol.

For applications such as UDP based voice/video streaming, retransmitting 
this frame over and over might cause degradation in the service. With 
the current implementation maybe the 1st problem is the RC nature and 
the retries are only the 2nd but why add them.

For for link (and below) layers reliability, IB has this 8-to-10 bits 
encoding, CRCs, L2 credit management, etc. So much is done below the IB 
transport legs anyway...

Or