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freebsd-skq/sys/netinet
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Matthew Dillon 701bec5a38 Introduce two new sysctl's: 
net.inet.tcp.rexmit_min (default 3 ticks equiv)

    This sysctl is the retransmit timer RTO minimum,
    specified in milliseconds.  This value is
    designed for algorithmic stability only.

net.inet.tcp.rexmit_slop (default 200ms)

    This sysctl is the retransmit timer RTO slop
    which is added to every retransmit timeout and
    is designed to handle protocol stack overheads
    and delayed ack issues.

Note that the *original* code applied a 1-second
RTO minimum but never applied real slop to the RTO
calculation, so any RTO calculation over one second
would have no slop and thus not account for
protocol stack overheads (TCP timestamps are not
a measure of protocol turnaround!).  Essentially,
the original code made the RTO calculation almost
completely irrelevant.

Please note that the 200ms slop is debateable.
This commit is not meant to be a line in the sand,
and if the community winds up deciding that increasing
it is the correct solution then it's easy to do.
Note that larger values will destroy performance
on lossy networks while smaller values may result in
a greater number of unnecessary retransmits.
2002-07-18 19:06:12 +00:00
..
libalias Move IPFW2 definition before including ip_fw.h 2002-07-18 05:18:41 +00:00
accf_data.c Remove so*_locked(), which were backed out by mistake. 2002-06-18 07:42:02 +00:00
accf_http.c Remove so*_locked(), which were backed out by mistake. 2002-06-18 07:42:02 +00:00
icmp6.h Revised MLD-related definitions 2002-05-06 16:28:25 +00:00
icmp_var.h Remove __P. 2002-03-19 21:25:46 +00:00
if_atm.c - Change the newly turned INVARIANTS #ifdef blocks (they were changed from 2002-05-21 18:52:24 +00:00
if_atm.h Remove __P. 2002-03-19 21:25:46 +00:00
if_ether.c Solve the 'unregistered netisr 18' information notice with a sledgehammer. 2002-06-20 01:27:40 +00:00
if_ether.h Fixed some style bugs in the removal of __P(()). Continuation lines 2002-03-24 10:19:10 +00:00
igmp_var.h Remove __P. 2002-03-19 21:25:46 +00:00
igmp.c s/demon/daemon/ 2002-05-12 00:22:38 +00:00
igmp.h
in_cksum.c
in_gif.c just merged cosmetic changes from KAME to ease sync between KAME and FreeBSD. 2002-04-19 04:46:24 +00:00
in_gif.h Remove __P. 2002-03-19 21:25:46 +00:00
in_pcb.c Notify functions can destroy the pcb, so they have to return an 2002-06-14 08:35:21 +00:00
in_pcb.h Notify functions can destroy the pcb, so they have to return an 2002-06-14 08:35:21 +00:00
in_proto.c Remove __P. 2002-03-19 21:25:46 +00:00
in_rmx.c Remove __P. 2002-03-19 21:25:46 +00:00
in_systm.h Remove __P. 2002-03-19 21:25:46 +00:00
in_var.h Fixed some style bugs in the removal of __P(()). Continuation lines 2002-03-24 10:19:10 +00:00
in.c Lock up inpcb. 2002-06-10 20:05:46 +00:00
in.h Remove some duplicate types that should have been removed as part of 2002-05-11 23:28:51 +00:00
ip6.h Sync with recent KAME. 2001-06-11 12:39:29 +00:00
ip_divert.c fix a typo in a comment 2002-06-23 09:13:46 +00:00
ip_dummynet.c Fix a panic when doing "ipfw add pipe 1 log ..." 2002-07-17 07:21:42 +00:00
ip_dummynet.h fix indentation of a comment 2002-06-23 09:14:24 +00:00
ip_ecn.c initialize local variable explicitly 2002-04-11 02:14:21 +00:00
ip_ecn.h Remove __P. 2002-03-19 21:25:46 +00:00
ip_encap.c just merged cosmetic changes from KAME to ease sync between KAME and FreeBSD. 2002-04-19 04:46:24 +00:00
ip_encap.h Remove __P. 2002-03-19 21:25:46 +00:00
ip_flow.c s/FREE/free/ 2001-11-04 17:35:31 +00:00
ip_flow.h
ip_fw2.c Implement keepalives for dynamic rules, so they will not expire 2002-07-14 23:47:18 +00:00
ip_fw.c Remove (almost all) global variables that were used to hold 2002-06-22 11:51:02 +00:00
ip_fw.h Fix a panic when doing "ipfw add pipe 1 log ..." 2002-07-17 07:21:42 +00:00
ip_icmp.c Prevent icmp_reflect() from calling ip_output() with a NULL route 2002-03-22 16:45:54 +00:00
ip_icmp.h Remove __P. 2002-03-19 21:25:46 +00:00
ip_id.c Remove __P. 2002-03-19 21:25:46 +00:00
ip_input.c Warning fixes for 64 bits platforms. With this last fix, 2002-06-27 11:02:06 +00:00
ip_mroute.c Just a comment on some additional consistency checks that could 2002-06-26 21:00:53 +00:00
ip_mroute.h Remove __P. 2002-03-19 21:25:46 +00:00
ip_output.c Avoid dereferencing a null pointer in ro_rt. 2002-07-12 22:08:47 +00:00
ip_var.h Remove ip_fw_fwd_addr (forgotten in previous commit) 2002-06-23 09:03:42 +00:00
ip.h o Add IPOPT_ESO for the 'Extended Security' IP option (RFC1108) 2001-12-14 19:37:32 +00:00
ipprotosw.h KSE Milestone 2 2001-09-12 08:38:13 +00:00
raw_ip.c Remember to initialize the control block head mutex. 2002-06-11 10:58:57 +00:00
tcp_debug.c Remove a change that snuck in from my private tree. 2001-12-21 05:07:39 +00:00
tcp_debug.h
tcp_fsm.h WARNS=n and lint(1) silencer. Declare an array of (const) strings 2002-02-03 11:57:32 +00:00
tcp_input.c Avoid unlocking the inp twice if badport_bandlim() returns -1. 2002-06-24 22:25:00 +00:00
tcp_output.c Slightly restructure the #ifdef INET6 sections to make the code 2002-06-23 21:25:36 +00:00
tcp_reass.c Avoid unlocking the inp twice if badport_bandlim() returns -1. 2002-06-24 22:25:00 +00:00
tcp_seq.h Move initialization of snd_recover into tcp_sendseqinit(). 2001-11-21 18:45:51 +00:00
tcp_subr.c Introduce two new sysctl's: 2002-07-18 19:06:12 +00:00
tcp_syncache.c One possible code path for syncache_respond() is: 2002-06-28 19:12:38 +00:00
tcp_timer.c Introduce two new sysctl's: 2002-07-18 19:06:12 +00:00
tcp_timer.h Introduce two new sysctl's: 2002-07-18 19:06:12 +00:00
tcp_timewait.c Introduce two new sysctl's: 2002-07-18 19:06:12 +00:00
tcp_usrreq.c Because we're holding an exclusive write lock on the head, references to 2002-06-13 23:14:58 +00:00
tcp_var.h Notify functions can destroy the pcb, so they have to return an 2002-06-14 08:35:21 +00:00
tcp.h o Minor style(9)ism to make consistent with -STABLE 2001-01-09 18:26:17 +00:00
tcpip.h Remove struct full_tcpiphdr{}. 2001-02-26 20:10:16 +00:00
udp_usrreq.c Back out the previous change, since it looks like locking udbinfo provides 2002-07-12 09:55:48 +00:00
udp_var.h Notify functions can destroy the pcb, so they have to return an 2002-06-14 08:35:21 +00:00
udp.h