On Thu, Feb 06, 2020 at 09:18:00PM -0800, Dimitris Dimitropoulos wrote: > Hi, > > I'm running the ibv_rc_pingpong example and I notice as as rx-depth > increases the QP create fails, eg at 50k. My understanding is this > variable controls the number of RECV WR that will be posted in advance > before SEND WRs are posted. > > Is there a limitation on the queue size (the size is unit32_t) and if > so why ? Also is there a way around it ? The rx-depth is translated to the size of completion queue buffer. That buffer used by hardware to post completions - writing completion queue elements (CQEs) and it is allocated when creating the CQ. Maximum number of CQEs can be retrieved by the ibv_devinfo -v, see max_cqe field. Thanks > > Regards > Dimitris
