>> On a side note, I see from rc_pingpong that ibv_query_gid requires >> an index, and that this index is asked to the user of the pingpong >> program. What is that index about (the man page is not very >> explicit)? Cannot it be deduced in any way ? > > It is the source GID of the local adaptor. Generally you can just use > index 0, particularly on RoCEE..
thanks, this fixed my problem. A couple questions: is there any overhead associated with using GIDs? man ibv_post_recv tells me that the GRH is written into the first 40 bytes of the receive buffer for UD QPs. Is that behavior only restricted to UD QPs, or should I plan the presence of this headers when using RC QPs ? Thanks, Xavier -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
