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freebsd-dev/sys/netinet
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Navdeep Parhar 7127e6acf0 Merge r254336 from user/np/cxl_tuning. 
Add a last-modified timestamp to each LRO entry and provide an interface
to flush all inactive entries.  Drivers decide when to flush and what
the inactivity threshold should be.

Network drivers that process an rx queue to completion can enter a
livelock type situation when the rate at which packets are received
reaches equilibrium with the rate at which the rx thread is processing
them.  When this happens the final LRO flush (normally when the rx
routine is done) does not occur.  Pure ACKs and segments with total
payload < 64K can get stuck in an LRO entry.  Symptoms are that TCP
tx-mostly connections' performance falls off a cliff during heavy,
unrelated rx on the interface.

Flushing only inactive LRO entries works better than any of these
alternates that I tried:
- don't LRO pure ACKs
- flush _all_ LRO entries periodically (every 'x' microseconds or every
  'y' descriptors)
- stop rx processing in the driver periodically and schedule remaining
  work for later.

Reviewed by:	andre
2013-08-28 23:00:34 +00:00
..
cc Import an implementation of the CAIA Delay-Gradient (CDG) congestion control 2013-07-02 08:44:56 +00:00
khelp The TCP PAWS fix for kernels with fast tick rates (r231767) changed the TCP 2012-08-17 01:49:51 +00:00
libalias In m_megapullup() instead of reserving some space at the end of packet, 2013-03-17 07:37:10 +00:00
accf_data.c
accf_dns.c
accf_http.c Mark all SYSCTL_NODEs static that have no corresponding SYSCTL_DECLs. 2011-11-07 15:43:11 +00:00
cc.h
icmp6.h Migrate structs in6_ifstat and icmp6_ifstat to PCPU counters. 2013-07-09 09:59:46 +00:00
icmp_var.h Remove most of the remaining sysctl name list macros. They were only 2013-08-26 18:16:05 +00:00
if_atm.c Add const qualifier to the dst parameter of the ifnet if_output method. 2013-04-26 12:50:32 +00:00
if_atm.h Add const qualifier to the dst parameter of the ifnet if_output method. 2013-04-26 12:50:32 +00:00
if_ether.c Add m_clrprotoflags() to clear protocol specific mbuf flags at up and 2013-08-19 13:27:32 +00:00
if_ether.h Add const qualifier to the dst parameter of the ifnet if_output method. 2013-04-26 12:50:32 +00:00
igmp_var.h Remove most of the remaining sysctl name list macros. They were only 2013-08-26 18:16:05 +00:00
igmp.c Restructure the mbuf pkthdr to make it fit for upcoming capabilities and 2013-08-24 19:51:18 +00:00
igmp.h
in_cksum.c nobody uses this file except the userspace ipfw code, but the cast 2012-07-31 08:04:49 +00:00
in_debug.c Remove last remnants of classful addressing: 2011-10-15 16:28:06 +00:00
in_gif.c Mechanically substitute flags from historic mbuf allocator with 2012-12-05 08:04:20 +00:00
in_gif.h
in_kdtrace.c Implement the ip, tcp, and udp DTrace providers. The probe definitions use 2013-08-25 21:54:41 +00:00
in_kdtrace.h Implement the ip, tcp, and udp DTrace providers. The probe definitions use 2013-08-25 21:54:41 +00:00
in_mcast.c Fix an integer overflow in computing the size of a temporary buffer 2013-08-22 00:51:37 +00:00
in_pcb.c A complete duplication of binding should be allowed if on both new and 2013-07-12 19:08:33 +00:00
in_pcb.h In r227207, to fix the issue with possible NULL inp_socket pointer 2013-07-04 18:38:00 +00:00
in_pcbgroup.c
in_proto.c Bunch of fixes to pfsync(4) module load/unload: 2012-01-09 08:50:22 +00:00
in_rmx.c Cleanup documentation: cloning route support has been removed in r186119. 2012-10-13 09:31:01 +00:00
in_systm.h
in_var.h Back out r249318, r249320 and r249327 due to a heisenbug most 2013-05-06 16:42:18 +00:00
in.c Migrate structs arpstat, icmpstat, mrtstat, pimstat and udpstat to PCPU 2013-07-09 09:50:15 +00:00
in.h Remove most of the remaining sysctl name list macros. They were only 2013-08-26 18:16:05 +00:00
ip6.h Use IP6STAT_INC/IP6STAT_DEC macros to update ip6 stats. 2013-04-09 07:11:22 +00:00
ip_carp.c Virtualize carp(4) variables to have per vnet control. 2013-08-13 19:59:49 +00:00
ip_carp.h Migrate struct carpstats to PCPU counters. 2013-07-09 10:02:51 +00:00
ip_divert.c Switch the entire IPv4 stack to keep the IP packet header 2012-10-22 21:09:03 +00:00
ip_divert.h
ip_dummynet.h s/lenght/length/ in comments 2012-08-07 07:52:25 +00:00
ip_ecn.c
ip_ecn.h
ip_encap.c
ip_encap.h
ip_fastfwd.c Implement the ip, tcp, and udp DTrace providers. The probe definitions use 2013-08-25 21:54:41 +00:00
ip_fw.h Add ipfw support for setting/matching DiffServ codepoints (DSCP). 2013-03-20 10:35:33 +00:00
ip_gre.c Add IFF_MONITOR support to gre(4). 2013-05-11 19:05:38 +00:00
ip_gre.h
ip_icmp.c Migrate structs arpstat, icmpstat, mrtstat, pimstat and udpstat to PCPU 2013-07-09 09:50:15 +00:00
ip_icmp.h
ip_id.c Back out r249318, r249320 and r249327 due to a heisenbug most 2013-05-06 16:42:18 +00:00
ip_input.c Implement the ip, tcp, and udp DTrace providers. The probe definitions use 2013-08-25 21:54:41 +00:00
ip_ipsec.c Switch the entire IPv4 stack to keep the IP packet header 2012-10-22 21:09:03 +00:00
ip_ipsec.h
ip_mroute.c Migrate structs arpstat, icmpstat, mrtstat, pimstat and udpstat to PCPU 2013-07-09 09:50:15 +00:00
ip_mroute.h Migrate structs arpstat, icmpstat, mrtstat, pimstat and udpstat to PCPU 2013-07-09 09:50:15 +00:00
ip_options.c - Replace compat macros with function calls. 2013-03-16 08:58:28 +00:00
ip_options.h In ip_stripoptions(): 2012-10-12 09:24:24 +00:00
ip_output.c Implement the ip, tcp, and udp DTrace providers. The probe definitions use 2013-08-25 21:54:41 +00:00
ip_var.h Move the global M_SKIP_FIREWALL mbuf flags to a protocol layer specific 2013-08-19 11:08:36 +00:00
ip.h Add ToS definitions for DiffServ Codepoints as per RFC2474. 2012-05-04 21:00:32 +00:00
pim_var.h Remove most of the remaining sysctl name list macros. They were only 2013-08-26 18:16:05 +00:00
pim.h
raw_ip.c Mechanically substitute flags from historic mbuf allocator with 2012-12-05 08:04:20 +00:00
sctp_asconf.c Allow the code to be compiled without warnings for any combination 2013-07-20 13:14:59 +00:00
sctp_asconf.h Pass the src and dst address of a received packet explicitly around. 2012-06-28 16:01:08 +00:00
sctp_auth.c Mechanically substitute flags from historic mbuf allocator with 2012-12-05 08:04:20 +00:00
sctp_auth.h Use consistent text at the begining of the files. 2012-05-23 11:26:28 +00:00
sctp_bsd_addr.c Testing an interface property should depend on the interface, not 2012-08-04 08:03:30 +00:00
sctp_bsd_addr.h Do packet logging in a consistent way. 2012-06-24 21:25:54 +00:00
sctp_cc_functions.c Get rid of a gcc'ism. 2012-09-06 07:03:56 +00:00
sctp_constants.h Fix a bug were only 2048 streams where usable even though more than 2013-07-05 10:08:49 +00:00
sctp_crc32.c Use consistent text at the begining of the files. 2012-05-23 11:26:28 +00:00
sctp_crc32.h Use consistent text at the begining of the files. 2012-05-23 11:26:28 +00:00
sctp_dtrace_declare.h Use consistent text at the begining of the files. 2012-05-23 11:26:28 +00:00
sctp_dtrace_define.h Specify SDT probe argument types in the probe definition itself rather than 2013-08-15 04:08:55 +00:00
sctp_header.h Don't include a structure containing a flexible array in another 2012-09-07 13:36:42 +00:00
sctp_indata.c Make the features a 64-bit value instead of 32-bit. 2013-08-12 13:52:15 +00:00
sctp_indata.h Code cleanups. 2013-07-03 18:48:43 +00:00
sctp_input.c Provide human readable debug output. 2013-08-25 12:44:03 +00:00
sctp_input.h Don't include a structure containing a flexible array in another 2012-09-07 13:36:42 +00:00
sctp_lock_bsd.h Use consistent text at the begining of the files. 2012-05-23 11:26:28 +00:00
sctp_os_bsd.h Reorder the mbuf defines to make more sense and group related flags 2013-08-19 14:25:11 +00:00
sctp_os.h Use consistent text at the begining of the files. 2012-05-23 11:26:28 +00:00
sctp_output.c Don't send uninitialized memory (two instances of 4 bytes) in 2013-08-14 21:51:32 +00:00
sctp_output.h Cleanup the handling of address scopes. Announce in the INIT/INIT-ACK 2013-02-09 17:26:14 +00:00
sctp_pcb.c Fix a bug were only 2048 streams where usable even though more than 2013-07-05 10:08:49 +00:00
sctp_pcb.h Make the features a 64-bit value instead of 32-bit. 2013-08-12 13:52:15 +00:00
sctp_peeloff.c Add support for sctp_peeloff() also in the front states of the 2012-11-26 16:44:03 +00:00
sctp_peeloff.h Remove unused function. 2012-11-25 14:25:08 +00:00
sctp_ss_functions.c Use consistent text at the begining of the files. 2012-05-23 11:26:28 +00:00
sctp_structs.h Make also the features of the association 64-bit. 2013-08-22 19:28:13 +00:00
sctp_sysctl.c Export the inpcb features as a 64-bit entity. 2013-08-22 20:29:57 +00:00
sctp_sysctl.h Fix a bug were only 2048 streams where usable even though more than 2013-07-05 10:08:49 +00:00
sctp_timer.c Fix a bug where HEARTBEATs were still sent in SHUTDOWN_SENT or 2013-02-09 08:27:08 +00:00
sctp_timer.h Use consistent text at the begining of the files. 2012-05-23 11:26:28 +00:00
sctp_uio.h Export the inpcb features as a 64-bit entity. 2013-08-22 20:29:57 +00:00
sctp_usrreq.c Micro-optimization suggested in 2013-08-01 12:05:23 +00:00
sctp_var.h Whitespace changes due to upstream integration of SCTP changes in the 2012-10-29 20:47:32 +00:00
sctp.h Make the features a 64-bit value instead of 32-bit. 2013-08-12 13:52:15 +00:00
sctputil.c Use LIST_EMPTY when appropriate. 2013-06-02 10:35:08 +00:00
sctputil.h Add support for SCTP/UDP/IPV6. 2012-11-17 20:04:04 +00:00
siftr.c The hashmask returned by hashinit() is a valid index in the returned hash array. 2013-03-07 04:42:20 +00:00
tcp_debug.c Switch the entire IPv4 stack to keep the IP packet header 2012-10-22 21:09:03 +00:00
tcp_debug.h
tcp_fsm.h
tcp_hostcache.c - Update cachelimit after hashsize and bucketlimit were set. 2012-10-19 14:00:03 +00:00
tcp_hostcache.h
tcp_input.c Implement the ip, tcp, and udp DTrace providers. The probe definitions use 2013-08-25 21:54:41 +00:00
tcp_lro.c Merge r254336 from user/np/cxl_tuning. 2013-08-28 23:00:34 +00:00
tcp_lro.h Merge r254336 from user/np/cxl_tuning. 2013-08-28 23:00:34 +00:00
tcp_offload.c - Updated TOE support in the kernel. 2012-06-19 07:34:13 +00:00
tcp_offload.h - Updated TOE support in the kernel. 2012-06-19 07:34:13 +00:00
tcp_output.c Implement the ip, tcp, and udp DTrace providers. The probe definitions use 2013-08-25 21:54:41 +00:00
tcp_reass.c uma_zone_set_max() directly returns the rounded effective zone 2013-02-01 14:21:09 +00:00
tcp_sack.c
tcp_seq.h Fix PAWS (Protect Against Wrapped Sequence numbers) in cases when 2012-02-15 16:09:56 +00:00
tcp_subr.c Implement the ip, tcp, and udp DTrace providers. The probe definitions use 2013-08-25 21:54:41 +00:00
tcp_syncache.c Implement the ip, tcp, and udp DTrace providers. The probe definitions use 2013-08-25 21:54:41 +00:00
tcp_syncache.h Unbreak VIMAGE by correctly naming the vnet pointer in struct tcp_syncache. 2013-07-12 07:43:56 +00:00
tcp_timer.c - Make callout(9) tickless, relying on eventtimers(4) as backend for 2013-03-04 11:09:56 +00:00
tcp_timer.h Add DELACK to list of timers. 2012-11-27 19:07:28 +00:00
tcp_timewait.c Mechanically substitute flags from historic mbuf allocator with 2012-12-05 08:04:20 +00:00
tcp_usrreq.c Implement the ip, tcp, and udp DTrace providers. The probe definitions use 2013-08-25 21:54:41 +00:00
tcp_var.h Remove most of the remaining sysctl name list macros. They were only 2013-08-26 18:16:05 +00:00
tcp.h Add placeholder constants to reserve a portion of the socket option 2013-02-01 15:32:20 +00:00
tcpip.h
toecore.c Teach toe_l2_resolve to resolve IPv6 destinations too. 2013-01-26 00:57:29 +00:00
toecore.h Correctly handle the case where an inp has already been dropped by the time 2012-08-21 18:09:33 +00:00
udp_usrreq.c The second last argument of udp:::receive is supposed to contain the 2013-08-26 00:28:57 +00:00
udp_var.h Remove most of the remaining sysctl name list macros. They were only 2013-08-26 18:16:05 +00:00
udp.h Add placeholder constants to reserve a portion of the socket option 2013-02-01 15:32:20 +00:00