bbr_bw
bw = bbr_bw(sk);
u64 bw = bbr_bw(sk);
bbr_set_pacing_rate(sk, bbr_bw(sk), BBR_UNIT);
interval_delivered = (u64)bbr_bw(sk) * interval_us >> BW_SCALE;
max_aggr_cwnd = ((u64)bbr_bw(sk) * bbr_extra_acked_max_us)
expected_acked = ((u64)bbr_bw(sk) * epoch_us) / BW_UNIT;