Eric Dumazet f2f872f927 netem: Introduce skb_orphan_partial() helper ... Commit 547669d483 ("tcp: xps: fix reordering issues") added unexpected reorders in case netem is used in a MQ setup for high performance test bed. ETH=eth0 tc qd del dev $ETH root 2>/dev/null tc qd add dev $ETH root handle 1: mq for i in `seq 1 32` do tc qd add dev $ETH parent 1:$i netem delay 100ms done As all tcp packets are orphaned by netem, TCP stack believes it can set skb->ooo_okay on all packets. In order to allow producers to send more packets, we want to keep sk_wmem_alloc from reaching sk_sndbuf limit. We can do that by accounting one byte per skb in netem queues, so that TCP stack is not fooled too much. Tested: With above MQ/netem setup, scaling number of concurrent flows gives linear results and no reorders/retransmits lpq83:~# for n in 1 10 20 30 40 50 60 70 80 90 100 do echo -n "n:$n " ; ./super_netperf $n -H 10.7.7.84; done n:1 198.46 n:10 2002.69 n:20 4000.98 n:30 6006.35 n:40 8020.93 n:50 10032.3 n:60 12081.9 n:70 13971.3 n:80 16009.7 n:90 17117.3 n:100 17425.5 Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2013-07-31 14:59:49 -07:00
..
9p	9p: client: remove unused code and any reference to "cancelled" function	2013-07-30 15:54:28 -07:00
802	net/802/mrp: fix lockdep splat	2013-05-14 13:02:30 -07:00
8021q	net: convert resend IGMP to notifier event	2013-07-23 16:52:47 -07:00
appletalk	net: pass info struct via netdevice notifier	2013-05-28 13:11:01 -07:00
atm	net: always pass struct netdev_notifier_info to netdevice notifiers	2013-05-28 21:58:54 -07:00
ax25	net: Convert uses of typedef ctl_table to struct ctl_table	2013-06-13 02:36:09 -07:00
batman-adv	net: Unmap fragment page once iterator is done	2013-06-24 01:46:01 -07:00
bluetooth	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2013-07-09 18:24:39 -07:00
bridge	bridge: cleanup netpoll code	2013-07-26 15:24:32 -07:00
caif	net: pass info struct via netdevice notifier	2013-05-28 13:11:01 -07:00
can	net: pass info struct via netdevice notifier	2013-05-28 13:11:01 -07:00
ceph	net: add sk_stream_is_writeable() helper	2013-07-24 17:54:48 -07:00
core	netem: Introduce skb_orphan_partial() helper	2013-07-31 14:59:49 -07:00
dcb	rtnetlink: Remove passing of attributes into rtnl_doit functions	2013-03-22 10:31:16 -04:00
dccp	net: add sk_stream_is_writeable() helper	2013-07-24 17:54:48 -07:00
decnet	net: Convert uses of typedef ctl_table to struct ctl_table	2013-06-13 02:36:09 -07:00
dns_resolver	net: strict_strtoul is obsolete, use kstrtoul instead	2013-07-12 16:09:14 -07:00
dsa	dsa: fix freeing of sparse port allocation	2013-03-25 12:23:41 -04:00
ethernet	net: Fix sysfs_format_mac() code duplication.	2013-07-16 17:09:22 -07:00
ieee802154	net: pass info struct via netdevice notifier	2013-05-28 13:11:01 -07:00
ipv4	net: split rt_genid for ipv4 and ipv6	2013-07-31 14:56:36 -07:00
ipv6	net: split rt_genid for ipv4 and ipv6	2013-07-31 14:56:36 -07:00
ipx	net: pass info struct via netdevice notifier	2013-05-28 13:11:01 -07:00
irda	net/irda: fixed style issues in irttp	2013-07-19 17:34:40 -07:00
iucv	net: delete __cpuinit usage from all net files	2013-07-14 19:36:58 -04:00
key	af_key: fix info leaks in notify messages	2013-06-26 15:15:54 -07:00
l2tp	l2tp: make datapath resilient to packet loss when sequence numbers enabled	2013-07-02 16:33:25 -07:00
lapb	net/lapb: remove depends on CONFIG_EXPERIMENTAL	2013-01-11 11:40:01 -08:00
llc	llc: Fix missing msg_namelen update in llc_ui_recvmsg()	2013-04-07 16:28:01 -04:00
mac80211	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2013-07-09 18:24:39 -07:00
mac802154	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2013-04-30 03:55:20 -04:00
mpls	MPLS: Add limited GSO support	2013-05-27 22:50:59 -07:00
netfilter	net/sctp: Refactor SCTP skb checksum computation	2013-07-27 20:07:15 -07:00
netlabel	net: pass info struct via netdevice notifier	2013-05-28 13:11:01 -07:00
netlink	netlink: fix splat in skb_clone with large messages	2013-06-27 22:44:16 -07:00
netrom	net: Convert uses of typedef ctl_table to struct ctl_table	2013-06-13 02:36:09 -07:00
nfc	NFC: llcp: Fix the well known services endianness	2013-06-14 13:45:10 +02:00
openvswitch	openvswitch: Add Kconfig dependency on GRE-DEMUX.	2013-07-01 13:19:43 -07:00
packet	net: Provide a generic socket error queue delivery method for Tx time stamps.	2013-07-22 14:58:19 -07:00
phonet	net: Convert uses of typedef ctl_table to struct ctl_table	2013-06-13 02:36:09 -07:00
rds	net: Convert uses of typedef ctl_table to struct ctl_table	2013-06-13 02:36:09 -07:00
rfkill	Merge branch 'for-john' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next	2013-04-22 14:58:14 -04:00
rose	net: Convert uses of typedef ctl_table to struct ctl_table	2013-06-13 02:36:09 -07:00
rxrpc	Driver core patches for 3.9-rc1	2013-02-21 12:05:51 -08:00
sched	netem: Introduce skb_orphan_partial() helper	2013-07-31 14:59:49 -07:00
sctp	net/sctp: Refactor SCTP skb checksum computation	2013-07-27 20:07:15 -07:00
sunrpc	net: add sk_stream_is_writeable() helper	2013-07-24 17:54:48 -07:00
tipc	net/tipc: use %*phC to dump small buffers in hex form	2013-07-11 17:03:36 -07:00
unix	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2013-07-09 18:24:39 -07:00
vmw_vsock	VSOCK: Move af_vsock.h and vsock_addr.h to include/net	2013-07-27 22:14:06 -07:00
wimax
wireless	Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next into for-davem	2013-06-28 13:18:21 -04:00
x25	x25: Fix broken locking in ioctl error paths.	2013-07-01 18:15:25 -07:00
xfrm	net: split rt_genid for ipv4 and ipv6	2013-07-31 14:56:36 -07:00
compat.c	net: Unbreak compat_sys_{send,recv}msg	2013-06-06 11:52:14 -07:00
Kconfig	pktgen: Require CONFIG_INET due to use of IPv4 checksum function	2013-07-30 16:45:09 -07:00
Makefile	MPLS: Add limited GSO support	2013-05-27 22:50:59 -07:00
nonet.c
socket.c	net: rename busy poll socket op and globals	2013-07-10 17:08:27 -07:00
sysctl_net.c