At 07:12 PM 5/16/2008, Roland Dreier wrote: >if we can't use the "WQE shrinking" feature (because of selective >signaling in the NFS/RDMA case), and we want to use 32 sge entries, then >the WQE size 's' will end up a little more than 512 bytes, and the >wqe_shift will end up as 10.
Can you elaborate on this? The NFS/RDMA client does selective signalling on its send queue in order to save on interrupts and CQE generation/handling. Which I always thought was a (very) good approach. Because the RPC request/response paradigm guarantees an eventual receive completion, we simply defer (or even completely avoid) this work. Would that be a bad trade if it takes a WQE management opportunity away from the provider? It's quite easy to change this in the NFS/RDMA code, or make it a selectable parameter. Tom. _______________________________________________ general mailing list [email protected] http://lists.openfabrics.org/cgi-bin/mailman/listinfo/general To unsubscribe, please visit http://openib.org/mailman/listinfo/openib-general
