On Mon, Sep 20, 2010 at 06:32:05PM +0200, Bernard Metzler wrote:
> while currently only supported by the InfiniBand transport,
> the libibverbs define a IBV_WR_RDMA_WRITE_WITH_IMM work request.
> Could someone please explain what the action at the peer side would be
> if a WRITE with immediate data comes in? One possible action would be
> to:
I've used this feature and according to my notes this is broadly
correct. A RWQE is consumed, the HCA doesn't use it for anything, and
the WC has the imm_data set, and the wr_id corrisponds to the RWQE.
The IBA notes the RWQE could be zero length.
The app needs to check for:
if (wc.opcode & IBV_WC_RECV)
To see if the completion consumed a RWQE.
> (3) set the WC's 'byte_len' to the received WRITE payload,
Hmm, I'm surprised by this, but, yep! pg 632 of the IBA.
Jason
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