Thus spake Sebastian Urbach (sebastian@urbach.org):
I want to ask for an status update regarding the bandwidth scanner project. It's been 3 weeks or so since we last heard anything.
PID feedback has been off since I last notified the list about shutting it off, on Dec 19th.
Some consensus params have changed due to dirauth instability, consensus method chnge, and confusion. In particular, the bwauthpid=1 param was explicitly set and unset a few times, and then set again, but the bw auths remained in their former "Section 2 compatible" mode of operation because no other feedback params were set for the duration.
See https://gitweb.torproject.org/torflow.git/blob/HEAD:/NetworkScanners/BwAutho... for more info on the consensus params that alter bw auth behavior, and please read the rest of the spec if you're interested in getting more involved.