I need help with flow control mechanisms and measurements.

Hello all, first time on this sub and I hope there is someone who can help me.

First thing i am looking for but failing is a source for Backpressure flow control. I know that bp is mainly a routing algorithm, but saw instances or tools which stated that they use it for regulating data flows.

Next thing is aspects to compare when looking at fc mechanisms. I know this sounds stupid, but i am in need for help. I already thought about comparing the transient time, so the time the mechanism requires to gain maximum throughput. I also noted package collision procedure, throughput potential and physical channel bandwidth usage but i dont know if these things are even worth to compare (or comparable at all)

I hope someone could help me with these questions