Hello, I see that in this repo the size of the cq ring is using uint32Size instead of the CompletionQueueEntry's size. For reference, in liburing they use CompletionQueueEntry.

Your code

liburing:
https://github.com/axboe/liburing/blob/a71d56ef3259216739677473ddb17ad861c3a964/src/setup.c#L29

size = sizeof(struct io_uring_cqe);
...
cq->ring_sz = p->cq_off.cqes + p->cq_entries * size;