AcoSail/kernel_optimize_test
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kernel_optimize_test/include/net
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Eric Dumazet bcdce7195e net: speedup sk_wake_async() 
An incoming datagram must bring into cpu cache *lot* of cache lines,
in particular : (other parts omitted (hash chains, ip route cache...))

On 32bit arches :

offsetof(struct sock, sk_rcvbuf)       =0x30    (read)
offsetof(struct sock, sk_lock)         =0x34   (rw)

offsetof(struct sock, sk_sleep)        =0x50 (read)
offsetof(struct sock, sk_rmem_alloc)   =0x64   (rw)
offsetof(struct sock, sk_receive_queue)=0x74   (rw)

offsetof(struct sock, sk_forward_alloc)=0x98   (rw)

offsetof(struct sock, sk_callback_lock)=0xcc    (rw)
offsetof(struct sock, sk_drops)        =0xd8 (read if we add dropcount support, rw if frame dropped)
offsetof(struct sock, sk_filter)       =0xf8    (read)

offsetof(struct sock, sk_socket)       =0x138 (read)

offsetof(struct sock, sk_data_ready)   =0x15c   (read)


We can avoid sk->sk_socket and socket->fasync_list referencing on sockets
with no fasync() structures. (socket->fasync_list ptr is probably already in cache
because it shares a cache line with socket->wait, ie location pointed by sk->sk_sleep)

This avoids one cache line load per incoming packet for common cases (no fasync())

We can leave (or even move in a future patch) sk->sk_socket in a cold location

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-10-06 17:28:29 -07:00
..
9p 9p: Add fscache support to 9p 2009-09-23 13:03:46 -05:00
bluetooth Bluetooth: Handle L2CAP case when the remote receiver is busy 2009-08-26 00:12:20 -07:00
irda net: mark read-only arrays as const 2009-08-05 10:42:58 -07:00
iucv af_iucv: Return -EAGAIN if iucv msg limit is exceeded 2009-06-19 00:10:40 -07:00
netfilter Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/kaber/nf-next-2.6 2009-09-10 18:17:09 -07:00
netns netns: embed ip6_dst_ops directly 2009-09-01 17:40:31 -07:00
phonet Phonet: sockets list through proc_fs 2009-07-23 17:58:19 -07:00
sctp net: Make setsockopt() optlen be unsigned. 2009-09-30 16:12:20 -07:00
tc_act
tipc
act_api.h net: restore gnet_stats_basic to previous definition 2009-08-17 21:33:49 -07:00
addrconf.h bonding: remap muticast addresses without using dev_close() and dev_open() 2009-09-15 02:37:40 -07:00
af_ieee802154.h af_ieee802154: add support for WANT_ACK socket option 2009-08-12 21:54:50 -07:00
af_rxrpc.h
af_unix.h
ah.h
arp.h net: make neigh_ops constant 2009-09-01 17:40:57 -07:00
atmclip.h
ax25.h
ax88796.h ax88796: Add method to take MAC from platform data 2009-03-24 23:32:03 -07:00
cfg80211.h cfg80211: fix dangling scan request checking 2009-08-20 11:36:05 -04:00
checksum.h
cipso_ipv4.h netlabel: Label incoming TCP connections correctly in SELinux 2009-03-28 15:01:36 +11:00
compat.h net: Make setsockopt() optlen be unsigned. 2009-09-30 16:12:20 -07:00
datalink.h
dcbnl.h dcbnl: Add support for setapp/getapp to netdev dcbnl_rtnl_ops 2009-09-01 01:24:30 -07:00
dn_dev.h
dn_fib.h
dn_neigh.h
dn_nsp.h
dn_route.h
dn.h
dsa.h dsa: add switch chip cascading support 2009-03-21 19:06:54 -07:00
dsfield.h
dst_ops.h netns: embed ip6_dst_ops directly 2009-09-01 17:40:31 -07:00
dst.h netns: embed ip6_dst_ops directly 2009-09-01 17:40:31 -07:00
esp.h
ethoc.h net: Add support for the OpenCores 10/100 Mbps Ethernet MAC. 2009-03-27 00:16:21 -07:00
fib_rules.h net: Remove unused parameter from fill method in fib_rules_ops. 2009-05-20 17:26:23 -07:00
flow.h
garp.h
gen_stats.h net: restore gnet_stats_basic to previous definition 2009-08-17 21:33:49 -07:00
genetlink.h genetlink: make netns aware 2009-07-12 14:03:27 -07:00
icmp.h
ieee80211_radiotap.h wireless: radiotap updates 2009-03-27 20:12:52 -04:00
ieee802154_netdev.h ieee802154: add support for channel pages from IEEE 802.15.4-2006 2009-08-19 23:08:22 +04:00
ieee802154.h ieee802154: move headers out of extra directory 2009-07-23 17:08:51 +04:00
if_inet6.h ipv6: reorder struct inet6_ifaddr to remove padding on 64 bit builds 2009-03-21 13:29:05 -07:00
inet6_connection_sock.h
inet6_hashtables.h net: skb->dst accessors 2009-06-03 02:51:04 -07:00
inet_common.h
inet_connection_sock.h net: Make setsockopt() optlen be unsigned. 2009-09-30 16:12:20 -07:00
inet_ecn.h
inet_frag.h inet fragments: fix sparse warning: context imbalance 2009-02-26 23:13:35 -08:00
inet_hashtables.h net: skb->dst accessors 2009-06-03 02:51:04 -07:00
inet_sock.h Merge branch 'for-linus2' of git://git.kernel.org/pub/scm/linux/kernel/git/vegard/kmemcheck 2009-06-16 13:09:51 -07:00
inet_timewait_sock.h net: annotate inet_timewait_sock bitfields 2009-06-15 15:49:32 +02:00
inetpeer.h
ip6_checksum.h
ip6_fib.h xfrm: select sane defaults for xfrm[4|6] gc_thresh 2009-07-30 18:52:15 -07:00
ip6_route.h net: skb->dst accessors 2009-06-03 02:51:04 -07:00
ip6_tunnel.h
ip_fib.h ipv4: fib table algorithm performance improvement 2009-10-05 00:21:56 -07:00
ip_vs.h net: mark read-only arrays as const 2009-08-05 10:42:58 -07:00
ip.h net: Make setsockopt() optlen be unsigned. 2009-09-30 16:12:20 -07:00
ipcomp.h
ipconfig.h
ipip.h tunnels: Optimize tx path 2009-10-05 00:21:57 -07:00
ipv6.h net: Make setsockopt() optlen be unsigned. 2009-09-30 16:12:20 -07:00
ipx.h
iw_handler.h libipw: switch from ieee80211_* to libipw_* naming policy 2009-08-28 14:40:28 -04:00
lapb.h
lib80211.h
llc_c_ac.h
llc_c_ev.h
llc_c_st.h
llc_conn.h
llc_if.h
llc_pdu.h
llc_s_ac.h
llc_s_ev.h
llc_s_st.h
llc_sap.h
llc.h
mac80211.h mac80211: remove ieee80211_rx namespace hack 2009-08-28 14:40:29 -04:00
mip6.h
ndisc.h sysctl: remove "struct file *" argument of ->proc_handler 2009-09-24 07:21:04 -07:00
neighbour.h net: make neigh_ops constant 2009-09-01 17:40:57 -07:00
net_namespace.h net: explain netns notifiers a little better 2009-07-20 08:03:00 -07:00
netdma.h
netevent.h
netlabel.h netlabel: Cleanup the Smack/NetLabel code to fix incoming TCP connections 2009-03-28 15:01:37 +11:00
netlink.h netlink: constify nlmsghdr arguments 2009-08-25 16:07:40 +02:00
netrom.h
nexthop.h
nl802154.h ieee802154: add support for channel pages from IEEE 802.15.4-2006 2009-08-19 23:08:22 +04:00
p8022.h
pkt_cls.h
pkt_sched.h pkt_sched: Revert tasklet_hrtimer changes. 2009-09-01 17:59:25 -07:00
protocol.h net: constify struct inet6_protocol 2009-09-14 17:03:05 -07:00
psnap.h snap: use const for descriptor 2009-03-21 19:06:50 -07:00
raw.h
rawv6.h ipv6: Use correct data types for ICMPv6 type and code 2009-06-23 04:31:07 -07:00
red.h
regulatory.h cfg80211: clean up includes 2009-04-22 16:57:17 -04:00
request_sock.h
rose.h NET: ROSE: Don't use static buffer. 2009-07-26 19:11:14 -07:00
route.h net: skb->rtable accessor 2009-06-03 02:51:02 -07:00
rtnetlink.h Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/kaber/nf-next-2.6 2009-09-10 18:17:09 -07:00
sch_generic.h pkt_sched: Fix tx queue selection in tc_modify_qdisc 2009-09-15 02:53:07 -07:00
scm.h cleanup: remove unused member in scm_cookie. 2009-07-05 19:16:10 -07:00
slhc_vj.h
snmp.h snmp: add missing counters for RFC 4293 2009-04-27 02:45:02 -07:00
sock.h net: speedup sk_wake_async() 2009-10-06 17:28:29 -07:00
stp.h
tcp_states.h
tcp.h net: Make setsockopt() optlen be unsigned. 2009-09-30 16:12:20 -07:00
timewait_sock.h
transp_v6.h inet: inet_connection_sock_af_ops const 2009-09-02 01:03:49 -07:00
udp.h net: Make setsockopt() optlen be unsigned. 2009-09-30 16:12:20 -07:00
udplite.h
wext.h wext: add back wireless/ dir in sysfs for cfg80211 interfaces 2009-09-28 16:55:07 -04:00
wimax.h rfkill: rewrite 2009-06-03 14:06:13 -04:00
wpan-phy.h ieee802154: add a sysfs representation of WPAN master devices 2009-08-19 23:08:20 +04:00
x25.h x25: Fix sleep from timer on socket destroy. 2009-06-16 05:40:30 -07:00
x25device.h
xfrm.h xfrm: select sane defaults for xfrm[4|6] gc_thresh 2009-07-30 18:52:15 -07:00