[BUG] VDIF packer on one NUMA node
Especially for low data rates, the VDIFPacker pipeline has a minor resource usage and can run on a single NUMA node. In the hotfix, the VDIF packer got the ability to run on a single NUMA node, but the pipeline still spawns two mkrecv
processes to capture two polarizations independently. It is preferable to capture both polarizations with a single mkrecv
process because the state transition (measuring -> ready) will reduce significantly (less buffers, less processes) and (most important) mkrecv
processes won't interfere.