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linux/net
Eric Dumazet 7004bf252c net: add tx_packets/tx_bytes/tx_dropped counters in struct netdev_queue
offsetof(struct net_device, features)=0x44
offsetof(struct net_device, stats.tx_packets)=0x54
offsetof(struct net_device, stats.tx_bytes)=0x5c
offsetof(struct net_device, stats.tx_dropped)=0x6c

Network drivers that touch dev->stats.tx_packets/stats.tx_bytes in their
tx path can slow down SMP operations, since they dirty a cache line
that should stay shared (dev->features is needed in rx and tx paths)

We could move away stats field in net_device but it wont help that much.
(Two cache lines dirtied in tx path, we can do one only)

Better solution is to add tx_packets/tx_bytes/tx_dropped in struct
netdev_queue because this structure is already touched in tx path and
counters updates will then be free (no increase in size)

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-05-18 15:15:06 -07:00
..
9p 9p: fix sparse warning: cast adds address space 2009-02-26 23:13:32 -08:00
802 tr: fix leakage of device in net/802/tr.c 2009-04-11 01:43:17 -07:00
8021q Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2009-04-29 20:30:35 -07:00
appletalk proc 2/2: remove struct proc_dir_entry::owner 2009-03-31 01:14:44 +04:00
atm Subject: [PATCH] br2684: restore net_dev initialization 2009-05-02 13:49:36 -07:00
ax25 ax25: proc uid file misses header 2009-04-20 02:14:59 -07:00
bluetooth Bluetooth: Move dev_set_name() to a context that can sleep 2009-05-05 13:26:08 -07:00
bridge netfilter: bridge: allow fragmentation of VLAN packets traversing a bridge 2009-04-20 17:12:35 +02:00
can can: Network Drop Monitor: Make use of consume_skb() in af_can.c 2009-04-17 01:38:46 -07:00
core net: add tx_packets/tx_bytes/tx_dropped counters in struct netdev_queue 2009-05-18 15:15:06 -07:00
dcb
dccp dccp: Do not let initial option overhead shrink the MPS 2009-03-02 03:07:23 -08:00
decnet ipv4: remove an unused parameter from configure method of fib_rules_ops. 2009-05-17 11:59:45 -07:00
dsa dsa: add switch chip cascading support 2009-03-21 19:06:54 -07:00
econet net: convert usage of packet_type to read_mostly 2009-03-10 05:22:43 -07:00
ethernet
ipv4 ipv4: remove an unused parameter from configure method of fib_rules_ops. 2009-05-17 11:59:45 -07:00
ipv6 net: remove needless (now buggy) & from dev->dev_addr 2009-05-17 11:59:47 -07:00
ipx ipx: use constant for strings and desciptor 2009-03-21 19:06:51 -07:00
irda proc tty: switch ircomm to ->proc_fops 2009-04-01 08:59:10 -07:00
iucv af_iucv: Fix merge. 2009-04-23 06:37:16 -07:00
key af_key: remove some pointless conditionals before kfree_skb() 2009-02-26 23:07:32 -08:00
lapb
llc net: remove needless (now buggy) & from dev->dev_addr (part2) 2009-05-17 11:59:53 -07:00
mac80211 mac80211: make noack test available 2009-05-13 15:44:53 -04:00
netfilter Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/kaber/nf-2.6 2009-05-05 12:00:53 -07:00
netlabel netlabel: Always remove the correct address selector 2009-04-22 00:46:09 -07:00
netlink Merge branch 'master' of /home/davem/src/GIT/linux-2.6/ 2009-03-26 15:23:24 -07:00
netrom net/netrom: Fix socket locking 2009-04-22 00:49:51 -07:00
packet packet: avoid warnings when high-order page allocation fails 2009-04-15 03:39:52 -07:00
phonet trivial: fix typos/grammar errors in Kconfig texts 2009-03-30 15:22:01 +02:00
rds ERR_PTR() dereference in net/rds/ib.c 2009-04-09 17:21:22 -07:00
rfkill net/rfkill/rfkill.c: fix build with CONFIG_RFKILL_LEDS=n 2009-05-06 15:14:40 -04:00
rose Revert "rose: zero length frame filtering in af_rose.c" 2009-04-14 20:28:00 -07:00
rxrpc RxRPC: Fix a potential NULL dereference 2009-02-06 21:50:52 -08:00
sched net: tx scalability works : trans_start 2009-05-17 20:55:16 -07:00
sctp sctp: add feature bit for SCTP offload in hardware 2009-04-28 01:53:14 -07:00
sunrpc Merge branch 'for-2.6.30' of git://linux-nfs.org/~bfields/linux 2009-04-06 13:25:56 -07:00
tipc net: remove needless (now buggy) & from dev->dev_addr 2009-05-17 11:59:47 -07:00
unix New helper - current_umask() 2009-03-31 23:00:26 -04:00
wanrouter wanrouter: fix sparse warnings: context imbalance 2009-02-26 23:13:36 -08:00
wimax Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2009-05-08 02:48:30 -07:00
wireless wext: remove seq_start/stop sparse annotations 2009-05-13 15:44:40 -04:00
x25 af_rose/x25: Sanity check the maximum user frame size 2009-03-27 00:28:21 -07:00
xfrm xfrm: wrong hash value for temporary SA 2009-04-27 02:58:59 -07:00
compat.c net: socket infrastructure for SO_TIMESTAMPING 2009-02-15 22:43:35 -08:00
Kconfig net: remove stale reference to fastroute from Kconfig help text 2009-05-07 16:31:01 -07:00
Makefile RDS: Kconfig and Makefile 2009-02-26 23:43:35 -08:00
nonet.c
socket.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2009-04-06 18:05:43 -07:00
sysctl_net.c net: sysctl_net - use net_eq to compare nets 2009-03-16 16:23:30 +01:00
TUNABLE