Hi Prasanna, Have you tried to call ibv_poll_cq(..) one more time (better - several times) ? Maybe at the moment of your poll the second CQE has not yet arrived ?
> -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Tzachi Dar > Sent: Wednesday, March 24, 2010 2:20 PM > To: prasanna; [email protected] > Subject: Re: [ofw] WinVerbs CQ events > > If I understand correctly, you do receive both packets but > only one CQ event. > > This is by design. > In order for a CQ to create an event it should be both armed > and also have a CQE that one has not polled. > In other words, once you ask for an event, you will only get > one event until you ask for a new event again. > Once you receive an event their can be many CQE on the CQ. > > In your test, both packets probably arrive "at the same time" > on the receiver so you don't have the time to arm again. If > you will change your sender to send 2 packets and wait for a > second between them you will have a chance in the receiver to > get one packet, ask_for_notification and get the second notification. > > Thanks > Tzachi > > > -----Original Message----- > > From: [email protected] > > [mailto:[email protected]] On Behalf Of prasanna > > Sent: Wednesday, March 24, 2010 1:36 PM > > To: [email protected] > > Subject: [ofw] WinVerbs CQ events > > > > Hi All, > > > > I observe a problem getting CQ events in WinVerbs 2.2 for the > > following > > sequence: > > > > 1. Client does a ibv_post_send() operation with a list of 2 > WRs (The > > 'next' field of first struct ibv_send_wr points to the second WR) > > > > 2. Receive program calls ibv_post_recv() twice each with a > single WR. > > > > In the above sequence, I see data from both WRs is transferred > > correctly from the client to the receiver. > > But the issue is, CQ event in the receiver is generated only once. > > Also, in the receiver CQ event handler, ibv_poll_cq(cq, 2, &wc[0]) > > returns 1. > > > > I expect either 2 CQ events in the receive side or > > ibv_poll_cq(..) should return 2 WCs. > > I tried both solicited & non-solicited CQ notification in > the recevier > > side. Also, the CQE is sufficiently large. > > > > Please let me know if you have clue to generate CQ event in the > > receiver in this sequence. > > > > Thanks, > > Prasanna > > _______________________________________________ > > ofw mailing list > > [email protected] > > http://lists.openfabrics.org/cgi-bin/mailman/listinfo/ofw > > > _______________________________________________ > ofw mailing list > [email protected] > http://lists.openfabrics.org/cgi-bin/mailman/listinfo/ofw > _______________________________________________ ofw mailing list [email protected] http://lists.openfabrics.org/cgi-bin/mailman/listinfo/ofw
