XRC and ib_poll_cq

Hi Sean,

Thanks, it seems that I asked the question in a wrong way.
The context is what I need eventually but in order to find it I first need to recover the QP or the XRC SRQ. Per core there may be several QP and SRQ using the same CQ.
When doing ib_poll_cq on the CQ the WQE in hand has only an ib_qp pointer.

S.P.

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Correct - dereference the qp pointer to get the context, srq, and srq_context.

struct ib_wc wc;

ib_poll_cq(...&wc)
my_qp = wc.qp;
my_qp_context = wc.qp->qp_context;
my_srq = wc.qp->srq;
my_srq_context = wc.qp->srq->srq_context;

this tells you what QP/SRQ the completion is related to.
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Hi Sean,

Your answer actually raises another question.
According to the annex the XRC SRQ is used directly (it is like an RD QP but without a requester side), and also in the user space example "xrc_pingpong.c" no QP is created on-top of the XRC SRQ. So the question is what is this QP that you de-referenced in the statement "my_srq = wc.qp->srq;"?
Is it just and artifact of the implementation?

S.P.

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