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5635c10d97
kernel_optimize_test/include/net
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Eric Dumazet 5635c10d97 net: make sure struct dst_entry refcount is aligned on 64 bytes 
As found in the past (commit f1dd9c379c
[NET]: Fix tbench regression in 2.6.25-rc1), it is really
important that struct dst_entry refcount is aligned on a cache line.

We cannot use __atribute((aligned)), so manually pad the structure
for 32 and 64 bit arches.

for 32bit : offsetof(truct dst_entry, __refcnt) is 0x80
for 64bit : offsetof(truct dst_entry, __refcnt) is 0xc0

As it is not possible to guess at compile time cache line size,
we use a generic value of 64 bytes, that satisfies many current arches.
(Using 128 bytes alignment on 64bit arches would waste 64 bytes)

Add a BUILD_BUG_ON to catch future updates to "struct dst_entry" dont
break this alignment.

"tbench 8" is 4.4 % faster on a dual quad core (HP BL460c G1), Intel E5450 @3.00GHz
(2350 MB/s instead of 2250 MB/s)

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-11-16 19:46:36 -08:00
..
9p 9p: fix sparse warnings 2008-10-22 18:54:47 -05:00
bluetooth include: replace __FUNCTION__ with __func__ 2008-10-16 11:21:30 -07:00
irda include: replace __FUNCTION__ with __func__ 2008-10-16 11:21:30 -07:00
iucv
netfilter misc: replace NIPQUAD() 2008-10-31 00:56:49 -07:00
netns net: implement emergency route cache rebulds when gc_elasticity is exceeded 2008-10-27 17:06:14 -07:00
phonet Phonet: include generic link-layer header size in MAX_PHONET_HEADER 2008-10-26 23:06:31 -07:00
sctp misc: replace NIPQUAD() 2008-10-31 00:56:49 -07:00
tc_act pkt_action: add new action skbedit 2008-09-12 16:30:20 -07:00
tipc tipc: Remove unneeded parameter to tipc_createport_raw() 2008-07-14 22:42:19 -07:00
act_api.h
addrconf.h netns: Add network namespace argument to rt6_fill_node() and ipv6_dev_get_saddr() 2008-08-14 15:33:21 -07:00
af_rxrpc.h
af_unix.h net: unix: fix inflight counting bug in garbage collector 2008-11-09 11:17:33 -08:00
ah.h
arp.h
atmclip.h
ax25.h
ax88796.h
cfg80211.h cfg80211: make use of reg macros on REG_RULE 2008-11-10 15:17:41 -05:00
checksum.h
cipso_ipv4.h cipso: Add support for native local labeling and fixup mapping names 2008-10-10 10:16:34 -04:00
compat.h net: Use standard structures for generic socket address structures. 2008-07-19 22:35:47 -07:00
datalink.h
dn_dev.h
dn_fib.h
dn_neigh.h
dn_nsp.h
dn_route.h
dn.h
dsa.h dsa: add support for Trailer tagging format 2008-10-08 17:24:16 -07:00
dsfield.h
dst.h net: make sure struct dst_entry refcount is aligned on 64 bytes 2008-11-16 19:46:36 -08:00
esp.h
fib_rules.h net: add fib_rules_ops to flush_cache method 2008-07-05 19:01:28 -07:00
flow.h ipv4: Loosen source address check on IPv4 output 2008-10-01 07:28:28 -07:00
garp.h vlan: Add GVRP support 2008-07-05 21:26:57 -07:00
gen_stats.h
genetlink.h netlink: Improve returned error codes 2008-06-03 16:36:54 -07:00
icmp.h mib: put icmpmsg statistics on struct net 2008-07-18 04:04:22 -07:00
ieee80211_crypt.h
ieee80211_radiotap.h include: use get/put_unaligned_* helpers 2008-07-25 10:53:26 -07:00
ieee80211.h wireless: avoid some net/ieee80211.h vs. linux/ieee80211.h conflicts 2008-10-31 19:00:50 -04:00
if_inet6.h ipv6: make struct ipv6_devconf static 2008-07-22 14:21:58 -07:00
inet6_connection_sock.h
inet6_hashtables.h inet: Don't lookup the socket if there's a socket attached to the skb 2008-10-07 12:41:01 -07:00
inet_common.h
inet_connection_sock.h net: more #ifdef CONFIG_COMPAT 2008-08-28 02:53:51 -07:00
inet_ecn.h
inet_frag.h
inet_hashtables.h net: Convert TCP & DCCP hash tables to use RCU / hlist_nulls 2008-11-16 19:40:17 -08:00
inet_sock.h tcp: Port redirection support for TCP 2008-10-01 07:46:49 -07:00
inet_timewait_sock.h net: Convert TCP & DCCP hash tables to use RCU / hlist_nulls 2008-11-16 19:40:17 -08:00
inetpeer.h net: remove CVS keywords 2008-06-11 21:00:38 -07:00
ip6_checksum.h
ip6_fib.h
ip6_route.h netns: Add network namespace argument to rt6_fill_node() and ipv6_dev_get_saddr() 2008-08-14 15:33:21 -07:00
ip6_tunnel.h net: remove CVS keywords 2008-06-11 21:00:38 -07:00
ip_fib.h
ip_vs.h IPVS: Remove supports_ipv6 scheduler flag 2008-11-03 17:08:56 -08:00
ip.h sysctl: simplify ->strategy 2008-10-16 11:21:47 -07:00
ipcomp.h ipsec: ipcomp - Merge IPComp implementations 2008-07-25 02:54:40 -07:00
ipconfig.h net: remove CVS keywords 2008-06-11 21:00:38 -07:00
ipip.h inet: Make tunnel RX/TX byte counters more consistent 2008-10-09 12:03:17 -07:00
ipv6.h ipv6: making ip and icmp statistics per/namespace 2008-10-08 11:16:45 -07:00
ipx.h
iw_handler.h wext: Emit event stream entries correctly when compat. 2008-06-16 18:50:49 -07:00
lapb.h
lib80211.h wireless: avoid some net/ieee80211.h vs. linux/ieee80211.h conflicts 2008-10-31 19:00:50 -04:00
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: Add a new event in ieee80211_ampdu_mlme_action 2008-11-10 15:17:32 -05:00
mip6.h
ndisc.h bonding: send IPv6 neighbor advertisement on failover 2008-11-06 00:49:37 -05:00
neighbour.h net: Cleanup of neighbour code 2008-11-12 00:54:54 -08:00
net_namespace.h net: Introduce read_pnet() and write_pnet() helpers 2008-11-12 00:53:30 -08:00
netdma.h
netevent.h
netlabel.h netlabel: Add configuration support for local labeling 2008-10-10 10:16:34 -04:00
netlink.h netlink: constify struct nlattr * arg to parsing functions 2008-10-28 11:59:11 -07:00
netrom.h
nexthop.h
p8022.h
pkt_cls.h
pkt_sched.h pkt_sched: Remove the tx queue state check in qdisc_run() 2008-09-23 01:05:56 -07:00
protocol.h
psnap.h
raw.h
rawv6.h
red.h
request_sock.h tcp: Fix kernel panic when calling tcp_v(4/6)_md5_do_lookup 2008-08-06 23:50:04 -07:00
rose.h rose: improving AX25 routing frames via ROSE network 2008-06-17 17:08:32 -07:00
route.h ipv4: Conditionally enable transparent flow flag when connecting 2008-10-01 07:35:39 -07:00
rtnetlink.h
sch_generic.h pkt_sched: Remove qdisc->ops->requeue() etc. 2008-11-13 22:56:30 -08:00
scm.h net: Fix recursive descent in __scm_destroy(). 2008-11-06 13:51:50 -08:00
slhc_vj.h
snmp.h net: remove CVS keywords 2008-06-11 21:00:38 -07:00
sock.h udp: Use hlist_nulls in UDP RCU code 2008-11-16 19:39:21 -08:00
stp.h net: Add STP demux layer 2008-07-05 21:25:39 -07:00
syncppp.h Remove bogus variables from syncppp.[ch] 2008-07-23 23:00:31 +02:00
tcp_states.h
tcp.h tcp: remove an unnecessary field in struct tcp_skb_cb 2008-11-13 22:44:11 -08:00
timewait_sock.h
transp_v6.h net: change proto destroy method to return void 2008-06-14 17:04:49 -07:00
udp.h udp: Use hlist_nulls in UDP RCU code 2008-11-16 19:39:21 -08:00
udplite.h udp: introduce struct udp_table and multiple spinlocks 2008-10-29 01:41:45 -07:00
wext.h wext: Dispatch and handle compat ioctls entirely in net/wireless/wext.c 2008-06-16 18:32:46 -07:00
wireless.h net: struct device - replace bus_id with dev_name(), dev_set_name() 2008-11-10 13:55:14 -08:00
x25.h
x25device.h
xfrm.h xfrm: remove unused struct xfrm_policy::next 2008-10-31 00:42:25 -07:00