[ofa-general] ibv_get_cq_event blocking forever after successful ibv_post_send...

[Jimmy Hill]

> -----Original Message-----
>
> SoBeBike wrote:
> > That is what I am already doing (note the comment, "// loop to
> > drain..."). I loop calling ibv_poll_cq until it is empty. I just noted
> > that due to the usage model, I only see it pull one CQE and then on
> > the 2nd pass through the loop the CQ is empty.
> >
>
> When you get to this scenario (for many times you don't get the CQ
> event) did you try to poll the CQ and check if there is any completion
> in it?
> (maybe the problem is that this WR just didn't create any completion
> when it ended).
>

My code currently blocks (either a blocking call, or looping with a
non-blocking FD) waiting for an event (ibv_get_cq_event) before attempting
to dequeue (ibv_poll_cq) any entries from the CQ. I assumed that if I did
not get a completion event, there would not be a CQ entry waiting. So, no, I
have not tried that. I can try that, but it may be a week or more before I
am able to get back to my machines.

Can I not rely on getting an event when I request signalled completions?

Thanks.