Priyaranjan Jha 1f2556916d tcp: higher throughput under reordering with adaptive RACK reordering wnd ... Currently TCP RACK loss detection does not work well if packets are being reordered beyond its static reordering window (min_rtt/4).Under such reordering it may falsely trigger loss recoveries and reduce TCP throughput significantly. This patch improves that by increasing and reducing the reordering window based on DSACK, which is now supported in major TCP implementations. It makes RACK's reo_wnd adaptive based on DSACK and no. of recoveries. - If DSACK is received, increment reo_wnd by min_rtt/4 (upper bounded by srtt), since there is possibility that spurious retransmission was due to reordering delay longer than reo_wnd. - Persist the current reo_wnd value for TCP_RACK_RECOVERY_THRESH (16) no. of successful recoveries (accounts for full DSACK-based loss recovery undo). After that, reset it to default (min_rtt/4). - At max, reo_wnd is incremented only once per rtt. So that the new DSACK on which we are reacting, is due to the spurious retx (approx) after the reo_wnd has been updated last time. - reo_wnd is tracked in terms of steps (of min_rtt/4), rather than absolute value to account for change in rtt. In our internal testing, we observed significant increase in throughput, in scenarios where reordering exceeds min_rtt/4 (previous static value). Signed-off-by: Priyaranjan Jha <priyarjha@google.com> Signed-off-by: Yuchung Cheng <ycheng@google.com> Signed-off-by: Neal Cardwell <ncardwell@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2017-11-05 23:15:42 +09:00
..
9p	9p: Implement show_options	2017-07-11 06:08:58 -04:00
bluetooth	Bluetooth: Use bt_dev_err and bt_dev_info when possible	2017-10-30 12:25:45 +02:00
caif
iucv	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
netfilter	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
netns	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-11-04 09:26:51 +09:00
nfc
phonet	net: phonet: mark phonet_protocol as const	2017-10-07 23:15:08 +01:00
sctp	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-10-30 21:09:24 +09:00
tc_act	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-11-04 09:26:51 +09:00
6lowpan.h
act_api.h	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-11-04 09:26:51 +09:00
addrconf.h	ipv6: remove IN6_ADDR_HSIZE from addrconf.h	2017-11-05 09:17:27 +09:00
af_ieee802154.h
af_rxrpc.h	rxrpc: Provide functions for allowing cleaner handling of signals	2017-10-18 11:42:48 +01:00
af_unix.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
af_vsock.h	VSOCK: use TCP state constants for sk_state	2017-10-05 18:44:17 -07:00
ah.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
arp.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
atmclip.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
ax25.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
ax88796.h
bond_3ad.h
bond_alb.h
bond_options.h	bonding: Prevent duplicate userspace notification	2017-05-27 18:51:41 -04:00
bonding.h	bonding: remove rtmsg_ifinfo called after bond_lower_state_changed	2017-10-25 10:54:39 +09:00
busy_poll.h	net: fix compilation when busy poll is not enabled	2017-08-11 14:59:24 -07:00
calipso.h	net, calipso: convert calipso_doi.refcount from atomic_t to refcount_t	2017-07-04 22:35:16 +01:00
cfg80211-wext.h
cfg80211.h	cfg80211/nl80211: add a port authorized event	2017-10-02 14:08:27 +02:00
cfg802154.h
checksum.h
cipso_ipv4.h	net, ipv4: convert cipso_v4_doi.refcount from atomic_t to refcount_t	2017-07-04 01:29:04 -07:00
cls_cgroup.h
codel.h
codel_impl.h
codel_qdisc.h
compat.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
datalink.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
dcbevent.h
dcbnl.h
devlink.h	devlink: Add IPv6 header for dpipe	2017-08-31 14:42:19 -07:00
dn.h	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-11-04 09:26:51 +09:00
dn_dev.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
dn_fib.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
dn_neigh.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
dn_nsp.h	net/decnet: Convert timers to use timer_setup()	2017-10-18 12:39:36 +01:00
dn_route.h
dsa.h	net: dsa: make tree index unsigned	2017-11-05 22:31:38 +09:00
dsfield.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
dst.h	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-11-04 09:26:51 +09:00
dst_cache.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
dst_metadata.h	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-11-04 09:26:51 +09:00
dst_ops.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
erspan.h	gre: introduce native tunnel support for ERSPAN	2017-08-22 14:29:30 -07:00
esp.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
ethoc.h
fib_notifier.h	net: Add extack to fib_notifier_info	2017-11-01 11:50:43 +09:00
fib_rules.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
firewire.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
flow.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
flow_dissector.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
fou.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
fq.h	fq: support filtering a given tin	2017-10-11 09:49:34 +02:00
fq_impl.h	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-10-30 21:09:24 +09:00
garp.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
gen_stats.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
genetlink.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
geneve.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
gre.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
gro_cells.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
gtp.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
gue.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
hwbm.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
icmp.h
ieee80211_radiotap.h
ieee802154_netdev.h
if_inet6.h	net, ipv6: convert ifacaddr6.aca_refcnt from atomic_t to refcount_t	2017-07-04 01:29:04 -07:00
ife.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
ila.h
inet6_connection_sock.h
inet6_hashtables.h	net: ipv6: add second dif to inet6 socket lookups	2017-08-07 11:39:22 -07:00
inet_common.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
inet_connection_sock.h	inet/connection_sock: Convert timers to use timer_setup()	2017-10-18 12:39:55 +01:00
inet_ecn.h	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-11-04 09:26:51 +09:00
inet_frag.h	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-11-04 09:26:51 +09:00
inet_hashtables.h	net: ipv4: add second dif to inet socket lookups	2017-08-07 11:39:21 -07:00
inet_sock.h	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-10-30 21:09:24 +09:00
inet_timewait_sock.h
inetpeer.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
ip.h	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-08-21 17:06:42 -07:00
ip6_checksum.h
ip6_fib.h	ipv6: take care of rt6_stats	2017-10-07 21:22:58 +01:00
ip6_route.h	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-11-04 09:26:51 +09:00
ip6_tunnel.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
ip_fib.h	net: ipv4: remove fib_weight	2017-09-29 06:19:32 +01:00
ip_tunnels.h	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-11-04 09:26:51 +09:00
ip_vs.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
ipcomp.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
ipconfig.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
ipv6.h	ipv6: Implement limits on Hop-by-Hop and Destination options	2017-11-03 09:50:22 +09:00
ipx.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
iw_handler.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
kcm.h
l3mdev.h
lapb.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
lib80211.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
llc.h	net, llc: convert llc_sap.refcnt from atomic_t to refcount_t	2017-07-04 22:35:15 +01:00
llc_c_ac.h	net: LLC: Convert timers to use timer_setup()	2017-10-25 12:06:25 +09:00
llc_c_ev.h
llc_c_st.h
llc_conn.h
llc_if.h
llc_pdu.h
llc_s_ac.h
llc_s_ev.h
llc_s_st.h
llc_sap.h
lwtunnel.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
mac80211.h	mac80211: add documentation to ieee80211_rx_ba_offl()	2017-09-21 11:42:00 +02:00
mac802154.h
mip6.h
mld.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
mpls.h
mpls_iptunnel.h
mrp.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
ncsi.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
ndisc.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
neighbour.h	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-11-04 09:26:51 +09:00
net_namespace.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
net_ratelimit.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
netevent.h	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-11-04 09:26:51 +09:00
netlabel.h	net: convert netlbl_lsm_cache.refcount from atomic_t to refcount_t	2017-07-01 07:39:09 -07:00
netlink.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
netprio_cgroup.h
netrom.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
nexthop.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
nl802154.h
nsh.h	net: add NSH header structures and helpers	2017-08-29 15:16:52 -07:00
p8022.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
ping.h
pkt_cls.h	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-11-04 09:26:51 +09:00
pkt_sched.h	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-11-04 09:26:51 +09:00
pptp.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
protocol.h	IPv4: early demux can return an error code	2017-10-01 03:55:47 +01:00
psample.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
psnap.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
raw.h	net: ipv4: add second dif to raw socket lookups	2017-08-07 11:39:21 -07:00
rawv6.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
red.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
regulatory.h
request_sock.h	tcp: socket option to set TCP fast open key	2017-10-20 13:21:36 +01:00
rose.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
route.h	udp: perform source validation for mcast early demux	2017-10-01 03:55:47 +01:00
rtnetlink.h	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-11-04 09:26:51 +09:00
sch_generic.h	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-11-04 09:26:51 +09:00
scm.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
secure_seq.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
seg6.h	ipv6: sr: add support for ip4ip6 encapsulation	2017-08-25 17:10:23 -07:00
seg6_hmac.h
slhc_vj.h
smc.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
snmp.h
sock.h	net/sock: Update sk rcu iterator macro.	2017-10-24 18:46:22 +09:00
sock_reuseport.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
Space.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
stp.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
strparser.h	strparser: Use delayed work instead of timer for msg timeout	2017-10-25 10:37:11 +09:00
switchdev.h	net: bridge: Notify on bridge device mrouter state changes	2017-10-09 10:18:11 -07:00
tcp.h	tcp: higher throughput under reordering with adaptive RACK reordering wnd	2017-11-05 23:15:42 +09:00
tcp_states.h
timewait_sock.h
tls.h	tls: kernel TLS support	2017-06-15 12:12:40 -04:00
transp_v6.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
tso.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
tun_proto.h	vxlan: factor out VXLAN-GPE next protocol	2017-08-29 15:16:52 -07:00
udp.h	IPv4: early demux can return an error code	2017-10-01 03:55:47 +01:00
udp_tunnel.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
udplite.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
vsock_addr.h
vxlan.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
wext.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
wimax.h
x25.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
x25device.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
xfrm.h	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-11-04 09:26:51 +09:00