commit 3a3f111b23d6d989dcae5858e2ab597a34f7910b Author: Mike Perry mikeperry-git@torproject.org Date: Sun Jan 23 18:15:12 2022 +0000

Exit slow start at the gamma threshold

This improves performance and fairness. --- src/core/or/congestion_control_vegas.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/core/or/congestion_control_vegas.c b/src/core/or/congestion_control_vegas.c index 0ebff17faf..ff825f94cc 100644 --- a/src/core/or/congestion_control_vegas.c +++ b/src/core/or/congestion_control_vegas.c @@ -210,8 +210,8 @@ congestion_control_vegas_process_sendme(congestion_control_t *cc, cc->cwnd = MAX(cc->cwnd + MAX(CWND_INC_SS(cc), 2*cc->sendme_inc), vegas_bdp_mix(cc)); } else { - /* Congestion signal: Fall back to Vegas equilibrium (BDP) */ - cc->cwnd = vegas_bdp_mix(cc); + /* Congestion signal: Set cwnd to gamma threshhold */ + cc->cwnd = vegas_bdp_mix(cc) + cc->vegas_params.gamma; cc->in_slow_start = 0; log_info(LD_CIRC, "CC: TOR_VEGAS exiting slow start"); }