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9ce8ade015
linux/net/ipv4
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John Heffner ae8064ac32 [TCP]: Bound TSO defer time 
This patch limits the amount of time you will defer sending a TSO segment
to less than two clock ticks, or the time between two acks, whichever is
longer.

On slow links, deferring causes significant bursts.  See attached plots,
which show RTT through a 1 Mbps link with a 100 ms RTT and ~100 ms queue
for (a) non-TSO, (b) currnet TSO, and (c) patched TSO.  This burstiness
causes significant jitter, tends to overflow queues early (bad for short
queues), and makes delay-based congestion control more difficult.

Deferring by a couple clock ticks I believe will have a relatively small
impact on performance.

Signed-off-by: John Heffner <jheffner@psc.edu>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-10-18 20:36:48 -07:00
..
ipvs [PATCH] ptrdiff_t is %t, not %z 2006-10-10 15:37:23 -07:00
netfilter [NETFILTER]: ctnetlink: Remove debugging messages 2006-10-15 23:14:11 -07:00
af_inet.c [IPV4]: struct ip_options annotations 2006-09-28 18:01:53 -07:00
ah4.c [XFRM]: Add XFRM_MODE_xxx for future use. 2006-09-22 15:05:15 -07:00
arp.c fix file specification in comments 2006-10-03 23:01:26 +02:00
cipso_ipv4.c NetLabel: the CIPSOv4 passthrough mapping does not pass categories correctly 2006-10-15 23:14:16 -07:00
datagram.c [IPV4]: ip_route_connect() ipv4 address arguments annotated 2006-09-28 17:54:06 -07:00
devinet.c [IPV4]: annotate inetdev.h helpers 2006-09-28 18:01:05 -07:00
esp4.c [XFRM]: BEET mode 2006-10-04 00:31:09 -07:00
fib_frontend.c [IPv4] fib: Remove unused fib_config members 2006-10-18 20:26:36 -07:00
fib_hash.c [IPV4]: trivial fib_hash.c annotations 2006-09-28 18:01:11 -07:00
fib_lookup.h [IPV4]: net/ipv4/fib annotations 2006-09-28 18:02:23 -07:00
fib_rules.c [IPV4]: FRA_{DST,SRC} annotated 2006-09-28 18:02:24 -07:00
fib_semantics.c [IPV4]: net/ipv4/fib annotations 2006-09-28 18:02:23 -07:00
fib_trie.c [IPV4] fib_trie.c: trivial annotations 2006-09-28 18:01:14 -07:00
icmp.c [IPV4] net/ipv4/icmp.c: trivial annotations 2006-09-28 18:02:19 -07:00
igmp.c [IPV4]: trivial igmp annotations 2006-09-28 18:02:02 -07:00
inet_connection_sock.c [IPV4]: inet_rcv_saddr() annotations 2006-09-28 18:02:28 -07:00
inet_diag.c [IPV4]: inet_diag annotations 2006-09-28 18:02:29 -07:00
inet_hashtables.c [IPV4]: annotate inet_lookup() and friends 2006-09-28 18:02:26 -07:00
inet_timewait_sock.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
inetpeer.c [NET]: reduce sizeof(struct inet_peer), cleanup, change in peer_check_expire() 2006-10-15 23:14:17 -07:00
ip_forward.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
ip_fragment.c [IPV4]: ip_fragment.c endianness annotations 2006-09-28 18:01:09 -07:00
ip_gre.c [NET]: Use hton{l,s}() for non-initializers. 2006-10-11 23:59:56 -07:00
ip_input.c [IPV4]: Clear the whole IPCB, this clears also IPCB(skb)->flags. 2006-07-24 23:45:16 -07:00
ip_options.c [IPV4]: trivial ip_options.c annotations 2006-09-28 18:01:55 -07:00
ip_output.c [IPV4]: struct ip_options annotations 2006-09-28 18:01:53 -07:00
ip_sockglue.c [IPV4]: ip_icmp_error() annotations 2006-09-28 18:02:09 -07:00
ipcomp.c [XFRM]: BEET mode 2006-10-04 00:31:09 -07:00
ipconfig.c [PATCH] namespaces: utsname: use init_utsname when appropriate 2006-10-02 07:57:21 -07:00
ipip.c [IPV4]: ipip and ip_gre encapsulation bugs 2006-09-22 15:19:43 -07:00
ipmr.c [IPV4]: mroute annotations 2006-09-28 18:02:22 -07:00
Kconfig [XFRM]: BEET mode 2006-10-04 00:31:09 -07:00
Makefile [XFRM]: BEET mode 2006-10-04 00:31:09 -07:00
multipath_drr.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
multipath_random.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
multipath_rr.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
multipath_wrandom.c [IPV4] bug: broken open-coded inet_make_mask() (multipath_wrandom) 2006-09-28 18:01:17 -07:00
multipath.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
netfilter.c [NETFILTER]: add type parameter to ip_route_me_harder 2006-10-04 00:30:54 -07:00
proc.c [IPV4]: add the UdpSndbufErrors and UdpRcvbufErrors MIBs 2006-09-22 14:54:41 -07:00
protocol.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
raw.c [IPV4]: struct ipcm_cookie annotation 2006-09-28 18:01:54 -07:00
route.c [NET]: Do not memcmp() over pad bytes of struct flowi. 2006-10-12 00:49:15 -07:00
syncookies.c [MLSXFRM]: Auto-labeling of child sockets 2006-09-22 14:53:29 -07:00
sysctl_net_ipv4.c [TCP]: default congestion control menu 2006-09-24 20:11:58 -07:00
tcp_bic.c [TCP] tcp_bic: use BUILD_BUG_ON 2006-09-22 15:18:04 -07:00
tcp_cong.c [TCP]: default congestion control menu 2006-09-24 20:11:58 -07:00
tcp_cubic.c [TCP] Congestion control (modulo lp, bic): use BUILD_BUG_ON 2006-09-22 15:18:13 -07:00
tcp_diag.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
tcp_highspeed.c [TCP] Congestion control (modulo lp, bic): use BUILD_BUG_ON 2006-09-22 15:18:13 -07:00
tcp_htcp.c [TCP] Congestion control (modulo lp, bic): use BUILD_BUG_ON 2006-09-22 15:18:13 -07:00
tcp_hybla.c [TCP] Congestion control (modulo lp, bic): use BUILD_BUG_ON 2006-09-22 15:18:13 -07:00
tcp_input.c [TCP]: Kill warning in tcp_clean_rtx_queue(). 2006-10-04 00:31:08 -07:00
tcp_ipv4.c [NET]: Use typesafe inet_twsk() inline function instead of cast. 2006-10-11 23:59:58 -07:00
tcp_lp.c [TCP] tcp-lp: prevent chance for oops 2006-09-28 18:03:07 -07:00
tcp_minisocks.c [NET/IPV4/IPV6]: Change some sysctl variables to __read_mostly 2006-09-22 14:55:03 -07:00
tcp_output.c [TCP]: Bound TSO defer time 2006-10-18 20:36:48 -07:00
tcp_probe.c [PATCH] Kprobes: Make kprobe modules more portable 2006-10-02 07:57:16 -07:00
tcp_scalable.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
tcp_timer.c [NET/IPV4/IPV6]: Change some sysctl variables to __read_mostly 2006-09-22 14:55:03 -07:00
tcp_vegas.c [TCP] Congestion control (modulo lp, bic): use BUILD_BUG_ON 2006-09-22 15:18:13 -07:00
tcp_veno.c [TCP] Congestion control (modulo lp, bic): use BUILD_BUG_ON 2006-09-22 15:18:13 -07:00
tcp_westwood.c [TCP] Congestion control (modulo lp, bic): use BUILD_BUG_ON 2006-09-22 15:18:13 -07:00
tcp.c [TCP]: Send ACKs each 2nd received segment. 2006-09-22 15:19:05 -07:00
tunnel4.c [INET]: Move no-tunnel ICMP error to tunnel4/tunnel6 2006-04-09 22:25:25 -07:00
udp.c [UDP]: Fix MSG_PROBE crash 2006-10-04 00:31:00 -07:00
xfrm4_input.c [XFRM]: xfrm_parse_spi() annotations 2006-09-28 18:02:39 -07:00
xfrm4_mode_beet.c [XFRM]: BEET mode 2006-10-04 00:31:09 -07:00
xfrm4_mode_transport.c [IPSEC]: output mode to take an xfrm state as input param 2006-09-22 15:18:48 -07:00
xfrm4_mode_tunnel.c [IPSEC]: output mode to take an xfrm state as input param 2006-09-22 15:18:48 -07:00
xfrm4_output.c [IPSEC]: output mode to take an xfrm state as input param 2006-09-22 15:18:48 -07:00
xfrm4_policy.c IPsec: correct semantics for SELinux policy matching 2006-10-11 23:59:37 -07:00
xfrm4_state.c [XFRM]: ports in struct xfrm_selector annotated 2006-09-28 18:02:33 -07:00
xfrm4_tunnel.c [XFRM]: Add XFRM_MODE_xxx for future use. 2006-09-22 15:05:15 -07:00