Roland:
This is a followup question. If one process uses
IBV_WR_SEND_WITH_IMM and IBV_SEND_INLINE to send 8 bytes, but the
receiver process does not post the corresponding receive to the QP,
instead, this receiver process and other processes are doing heavy
RDMA_WRITE/READ traffic each other.
Does this pending SEND_WITH_IMM message affect the performance
of the receiver process ? Is this message buffered in the receiver's
HCA, or the sender retry and get RNR ack until receiver posts a receive
?
Thanks.
--CQ
> -----Original Message-----
> From: Roland Dreier [mailto:[EMAIL PROTECTED]
> Sent: Monday, February 05, 2007 5:03 PM
> To: Tang, Changqing
> Cc: Michael S. Tsirkin; openib-general@openib.org
> Subject: Re: Immediate data question
>
> Changqing> Thank you. Other than using immediate data to send
> Changqing> notification from one end to the other of a QP, is
> Changqing> there any other way to do this ? For example, can I
> Changqing> modify QP state from RTS to other state on one end, and
> Changqing> then the other end gets some notification when I query
> Changqing> the QP ?
>
> Not that I know of. You would need to do something that
> triggers something to be sent on the wire, and I don't know
> of any way to do that other than posting a work request.
>
> - R.
>
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