[ofa-general] SDP and iWARP
Steve Wise
swise at opengridcomputing.com
Thu Jan 24 09:54:26 PST 2008
Roland Dreier wrote:
> Sorry to come into this thread so late, but does it make sense to try
> the current SDP code over iWARP? As I understand things, the RDMA
> consortium has its own spec for SDP on iWARP, which may not precisely
> correspond to the IBA SDP annex. So probably the SDP code would need
> updating to work over iWARP.
>
I didn't think they were that different, but I don't know for sure.
However, unless the IB-SDP uses atomics or some other IB-specific work
request, it just might work.
> (And don't all the iWARP vendors have TCP offload socket stuff for
> their adapters anyway, which is a simpler solution to the same problem
> that SDP solves?)
>
Dunno about other vendors, but Chelsio's TOE code is available on their
web site (service.chelsio.com). It will be more efficient than SDP over
iWARP (no SDP/iWARP headers needed).
I assume Craig is doing some research to perhaps determine exactly how
SDP performs over iwarp vs TOE or standard TCP.
Steve.
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