From: Kenneth Klette Jonassen <kenne...@ifi.uio.no> Date: Wed, 10 Jun 2015 19:08:17 +0200
> CAIA Delay-Gradient (CDG) is a TCP congestion control that modifies > the TCP sender in order to [1]: > > o Use the delay gradient as a congestion signal. > o Back off with an average probability that is independent of the RTT. > o Coexist with flows that use loss-based congestion control, i.e., > flows that are unresponsive to the delay signal. > o Tolerate packet loss unrelated to congestion. (Disabled by default.) > > Its FreeBSD implementation was presented for the ICCRG in July 2012; > slides are available at http://www.ietf.org/proceedings/84/iccrg.html > > Running the experiment scenarios in [1] suggests that our implementation > achieves more goodput compared with FreeBSD 10.0 senders, although it also > causes more queueing delay for a given backoff factor. > > The loss tolerance heuristic is disabled by default due to safety concerns > for its use in the Internet [2, p. 45-46]. > > We use a variant of the Hybrid Slow start algorithm in tcp_cubic to reduce > the probability of slow start overshoot. > > [1] D.A. Hayes and G. Armitage. "Revisiting TCP congestion control using > delay gradients." In Networking 2011, pages 328-341. Springer, 2011. > [2] K.K. Jonassen. "Implementing CAIA Delay-Gradient in Linux." > MSc thesis. Department of Informatics, University of Oslo, 2015. > > Cc: Eric Dumazet <eduma...@google.com> > Cc: Yuchung Cheng <ych...@google.com> > Cc: Stephen Hemminger <step...@networkplumber.org> > Cc: Neal Cardwell <ncardw...@google.com> > Cc: David Hayes <davi...@ifi.uio.no> > Cc: Andreas Petlund <apetl...@simula.no> > Cc: Dave Taht <dave.t...@bufferbloat.net> > Cc: Nicolas Kuhn <nicolas.k...@telecom-bretagne.eu> > Signed-off-by: Kenneth Klette Jonassen <kenne...@ifi.uio.no> Applied. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
