> I was wondering if a receive work completion tells me how
 > many bytes had been placed. Is 'byte_len' the field indicating
 > that value?

Not sure what an "RDMA send" is -- if you mean a normal send (as opposed
to an RDMA operation), then yes the byte_len field has the length of the
message that was received.

 > The various fields of 'struct ibv_wc' are not quite clear to me.
 > Can you point me to a document where this is described?

The "poll CQ" section of chapter 11 of the IB spec should cover it.

 - R.
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