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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 <edumazet@google.com>
Cc: Yuchung Cheng <ycheng@google.com>
Cc: Stephen Hemminger <stephen@networkplumber.org>
Cc: Neal Cardwell <ncardwell@google.com>
Cc: David Hayes <davihay@ifi.uio.no>
Cc: Andreas Petlund <apetlund@simula.no>
Cc: Dave Taht <dave.taht@bufferbloat.net>
Cc: Nicolas Kuhn <nicolas.kuhn@telecom-bretagne.eu>
Signed-off-by: Kenneth Klette Jonassen <kennetkl@ifi.uio.no>
Acked-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
63 lines
2.5 KiB
Makefile
63 lines
2.5 KiB
Makefile
#
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# Makefile for the Linux TCP/IP (INET) layer.
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#
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obj-y := route.o inetpeer.o protocol.o \
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ip_input.o ip_fragment.o ip_forward.o ip_options.o \
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ip_output.o ip_sockglue.o inet_hashtables.o \
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inet_timewait_sock.o inet_connection_sock.o \
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tcp.o tcp_input.o tcp_output.o tcp_timer.o tcp_ipv4.o \
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tcp_minisocks.o tcp_cong.o tcp_metrics.o tcp_fastopen.o \
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tcp_offload.o datagram.o raw.o udp.o udplite.o \
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udp_offload.o arp.o icmp.o devinet.o af_inet.o igmp.o \
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fib_frontend.o fib_semantics.o fib_trie.o \
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inet_fragment.o ping.o ip_tunnel_core.o gre_offload.o
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obj-$(CONFIG_NET_IP_TUNNEL) += ip_tunnel.o
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obj-$(CONFIG_SYSCTL) += sysctl_net_ipv4.o
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obj-$(CONFIG_PROC_FS) += proc.o
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obj-$(CONFIG_IP_MULTIPLE_TABLES) += fib_rules.o
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obj-$(CONFIG_IP_MROUTE) += ipmr.o
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obj-$(CONFIG_NET_IPIP) += ipip.o
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gre-y := gre_demux.o
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obj-$(CONFIG_NET_FOU) += fou.o
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obj-$(CONFIG_NET_IPGRE_DEMUX) += gre.o
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obj-$(CONFIG_NET_IPGRE) += ip_gre.o
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obj-$(CONFIG_NET_UDP_TUNNEL) += udp_tunnel.o
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obj-$(CONFIG_NET_IPVTI) += ip_vti.o
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obj-$(CONFIG_SYN_COOKIES) += syncookies.o
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obj-$(CONFIG_INET_AH) += ah4.o
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obj-$(CONFIG_INET_ESP) += esp4.o
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obj-$(CONFIG_INET_IPCOMP) += ipcomp.o
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obj-$(CONFIG_INET_XFRM_TUNNEL) += xfrm4_tunnel.o
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obj-$(CONFIG_INET_XFRM_MODE_BEET) += xfrm4_mode_beet.o
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obj-$(CONFIG_INET_LRO) += inet_lro.o
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obj-$(CONFIG_INET_TUNNEL) += tunnel4.o
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obj-$(CONFIG_INET_XFRM_MODE_TRANSPORT) += xfrm4_mode_transport.o
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obj-$(CONFIG_INET_XFRM_MODE_TUNNEL) += xfrm4_mode_tunnel.o
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obj-$(CONFIG_IP_PNP) += ipconfig.o
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obj-$(CONFIG_NETFILTER) += netfilter.o netfilter/
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obj-$(CONFIG_INET_DIAG) += inet_diag.o
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obj-$(CONFIG_INET_TCP_DIAG) += tcp_diag.o
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obj-$(CONFIG_INET_UDP_DIAG) += udp_diag.o
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obj-$(CONFIG_NET_TCPPROBE) += tcp_probe.o
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obj-$(CONFIG_TCP_CONG_BIC) += tcp_bic.o
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obj-$(CONFIG_TCP_CONG_CDG) += tcp_cdg.o
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obj-$(CONFIG_TCP_CONG_CUBIC) += tcp_cubic.o
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obj-$(CONFIG_TCP_CONG_DCTCP) += tcp_dctcp.o
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obj-$(CONFIG_TCP_CONG_WESTWOOD) += tcp_westwood.o
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obj-$(CONFIG_TCP_CONG_HSTCP) += tcp_highspeed.o
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obj-$(CONFIG_TCP_CONG_HYBLA) += tcp_hybla.o
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obj-$(CONFIG_TCP_CONG_HTCP) += tcp_htcp.o
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obj-$(CONFIG_TCP_CONG_VEGAS) += tcp_vegas.o
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obj-$(CONFIG_TCP_CONG_VENO) += tcp_veno.o
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obj-$(CONFIG_TCP_CONG_SCALABLE) += tcp_scalable.o
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obj-$(CONFIG_TCP_CONG_LP) += tcp_lp.o
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obj-$(CONFIG_TCP_CONG_YEAH) += tcp_yeah.o
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obj-$(CONFIG_TCP_CONG_ILLINOIS) += tcp_illinois.o
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obj-$(CONFIG_MEMCG_KMEM) += tcp_memcontrol.o
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obj-$(CONFIG_NETLABEL) += cipso_ipv4.o
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obj-$(CONFIG_GENEVE_CORE) += geneve_core.o
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obj-$(CONFIG_XFRM) += xfrm4_policy.o xfrm4_state.o xfrm4_input.o \
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xfrm4_output.o xfrm4_protocol.o
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