The bpcat test tool transfers bundles via a UDP socket. Even when running locally on the same PC (i.e. using a localhost socket) bplib can generate traffic fast enough to overfill the outgoing UDP buffer in the network stack, resulting in lost bundles. These are then (eventually) retried, but this slows the transfer down considerably, and drastically increases the number of out-of-order frames received at the other side.
An simple workaround is to simply throttle down calls to send() by adding an artificial delay between each bundle. This will slow down the transfer initially, but over the longer term it will greatly increase the throughput because there will not be as many retries.
The
bpcattest tool transfers bundles via a UDP socket. Even when running locally on the same PC (i.e. using alocalhostsocket) bplib can generate traffic fast enough to overfill the outgoing UDP buffer in the network stack, resulting in lost bundles. These are then (eventually) retried, but this slows the transfer down considerably, and drastically increases the number of out-of-order frames received at the other side.An simple workaround is to simply throttle down calls to
send()by adding an artificial delay between each bundle. This will slow down the transfer initially, but over the longer term it will greatly increase the throughput because there will not be as many retries.