- Stop using circular buffers for storing samples
- Use multiple Send/Recv in parallel
- Make polling calls non-blocking
- Fine-tune permissions on MR and QP

- Use common circular buffer implementation
- Handle two channels (hardcoded)
- Receive samples asynchronously from RDMA
- Handle timestamps correctly

- Save input and output timestamps separately
- Avoid timestamp mismatch from trx_play
- Loop on reading samples from input device