[openib-general] QP with large starting sequence adds latency to RDMA READ???

[Arlin Davis]

I just noticed some RDMA read performance issues that seem to be related 
to the QP starting sequence number. If I set the starting sequence to 1 
then all is fine but if I set it to 0x10000 then it seems to add ~40us 
to my 32KB RDMA read operation (polling for completions). Has anyone 
seen anything like this?

I am running a PCI-e HCA adapter in a EM64T server.

RDMA writes and message sends seem to be unaffected.

-arlin