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8d3f099abe
linux/net/ipv4
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Eric Dumazet 8d3f099abe [IPV4] FIB_HASH : Avoid unecessary loop in fn_hash_dump_zone() 
I noticed "ip route list" was slower than "cat /proc/net/route" on a
machine with a full Internet routing table (214392 entries : Special
thanks to Robert ;) )

This is similar to problem reported in commit
d8c9283089 ("[IPV4] ROUTE: ip_rt_dump()
is unecessary slow")

Fix is to avoid scanning the begining of fz_hash table, but directly
seek to the right offset.

Before patch :

time ip route >/tmp/ROUTE

real    0m1.285s
user    0m0.712s
sys     0m0.436s

After patch

# time ip route >/tmp/ROUTE

real    0m0.835s
user    0m0.692s
sys     0m0.124s

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-20 20:31:39 -08:00
..
ipvs [IPVS]: Fix sched registration race when checking for name collision. 2007-12-05 05:37:27 -08:00
netfilter [NETFILTER]: nf_conntrack_ipv4: fix module parameter compatibility 2007-12-26 19:36:33 -08:00
af_inet.c [NET]: Forget the zero_it argument of sk_alloc() 2007-11-01 00:39:31 -07:00
ah4.c cleanup asm/scatterlist.h includes 2007-11-02 08:47:06 +01:00
arp.c [IPV4] ARP: Remove not used code 2007-12-19 23:38:11 -08:00
cipso_ipv4.c [NetLabel]: correct usage of RCU locking 2007-10-26 04:29:08 -07:00
datagram.c [IPV4]: Fix "ipOutNoRoutes" counter error for TCP and UDP 2007-06-03 18:08:50 -07:00
devinet.c [INET]: Fix netdev renaming and inet address labels 2008-01-04 03:55:34 -08:00
esp4.c [IPv4] ESP: Discard dummy packets introduced in rfc4303 2007-12-11 02:45:26 -08:00
fib_frontend.c [IPV4]: OOPS with NETLINK_FIB_LOOKUP netlink socket 2007-12-21 02:01:53 -08:00
fib_hash.c [IPV4] FIB_HASH : Avoid unecessary loop in fn_hash_dump_zone() 2008-01-20 20:31:39 -08:00
fib_lookup.h [RTNETLINK]: Fix sending netlink message when replace route. 2007-05-24 16:36:53 -07:00
fib_rules.c [INET]: Small possible memory leak in FIB rules 2007-11-10 22:12:03 -08:00
fib_semantics.c [NETLINK]: Introduce nested and byteorder flag to netlink attribute 2007-10-10 16:49:16 -07:00
fib_trie.c [IPV4] fib_trie: fix duplicated route issue 2008-01-20 20:31:38 -08:00
icmp.c [INET]: Unexport icmpmsg_statistics 2007-10-26 04:06:08 -07:00
igmp.c [NET]: Make core networking code use seq_open_private 2007-10-10 16:55:33 -07:00
inet_connection_sock.c [INET]: Justification for local port range robustness. 2007-10-18 22:00:17 -07:00
inet_diag.c [INET]: Fix inet_diag dead-lock regression 2007-12-03 15:51:25 +11:00
inet_fragment.c [INET]: Consolidate frag queues freeing 2007-10-17 19:48:26 -07:00
inet_hashtables.c [INET]: Remove per bucket rwlock in tcp/dccp ehash table. 2007-11-07 04:15:11 -08:00
inet_lro.c [LRO] Fix lro_mgr->features checks 2008-01-08 23:30:18 -08:00
inet_timewait_sock.c [INET]: Remove per bucket rwlock in tcp/dccp ehash table. 2007-11-07 04:15:11 -08:00
inetpeer.c [INET]: Use list_head-s in inetpeer.c 2007-11-12 21:27:28 -08:00
ip_forward.c [IPV4]: Uninline netfilter okfns 2007-10-15 12:26:35 -07:00
ip_fragment.c [NET]: Fix uninitialised variable in ip_frag_reasm() 2007-10-17 21:37:22 -07:00
ip_gre.c [IPV4] ip_gre: set mac_header correctly in receive path 2007-12-20 00:10:33 -08:00
ip_input.c [IPV4]: Uninline netfilter okfns 2007-10-15 12:26:35 -07:00
ip_options.c [IPV4] ip_options.c: kmalloc + memset conversion to kzalloc 2007-07-31 14:06:45 -07:00
ip_output.c [IPV4]: Consolidate the ip cork destruction in ip_output.c 2007-11-07 04:08:25 -08:00
ip_sockglue.c [IPV4]: Clean the ip_sockglue.c from some ugly ifdefs 2007-11-07 04:08:55 -08:00
ipcomp.c [IPSEC]: Fix crypto_alloc_comp error checking 2007-11-07 04:15:03 -08:00
ipconfig.c [IPV4] ipconfig: Fix regression in ip command line processing 2008-01-08 23:29:58 -08:00
ipip.c [NET]: Treat the sign of the result of skb_headroom() consistently 2007-10-23 21:27:55 -07:00
ipmr.c [NET]: Make core networking code use seq_open_private 2007-10-10 16:55:33 -07:00
Kconfig typo fixes 2007-10-20 01:34:40 +02:00
Makefile [INET]: Collect frag queues management objects together 2007-10-15 12:26:39 -07:00
netfilter.c [NETFILTER]: Replace sk_buff ** with sk_buff * 2007-10-15 12:26:29 -07:00
proc.c [NET]: Define infrastructure to keep 'inuse' changes in an efficent SMP/NUMA way. 2007-11-07 04:08:57 -08:00
protocol.c [IPV4]: align inet_protos[] on SMP 2007-04-25 22:28:20 -07:00
raw.c [IPV4] raw: Strengthen check on validity of iph->ihl 2008-01-08 23:29:57 -08:00
route.c [IPV4] ROUTE: fix rcu_dereference() uses in /proc/net/rt_cache 2008-01-10 03:55:57 -08:00
syncookies.c [SK_BUFF]: Introduce tcp_hdr(), remove skb->h.th 2007-04-25 22:25:26 -07:00
sysctl_net_ipv4.c [TCP]: Problem bug with sysctl_tcp_congestion_control function 2007-11-19 23:28:21 -08:00
tcp_bic.c [TCP]: Remove num_acked>0 checks from cong.ctrl mods pkts_acked 2007-10-10 16:47:55 -07:00
tcp_cong.c [TCP]: remove unused argument to cong_avoid op 2007-07-18 01:46:58 -07:00
tcp_cubic.c [TCP]: Remove num_acked>0 checks from cong.ctrl mods pkts_acked 2007-10-10 16:47:55 -07:00
tcp_diag.c [INET]: Let inet_diag and friends autoload 2007-10-22 02:59:54 -07:00
tcp_highspeed.c [TCP]: remove unused argument to cong_avoid op 2007-07-18 01:46:58 -07:00
tcp_htcp.c [TCP]: H-TCP maxRTT estimation at startup 2007-08-07 18:29:05 -07:00
tcp_hybla.c [TCP]: remove unused argument to cong_avoid op 2007-07-18 01:46:58 -07:00
tcp_illinois.c [TCP] illinois: Incorrect beta usage 2007-11-30 01:10:55 +11:00
tcp_input.c [TCP]: use non-delayed ACK for congestion control RTT 2007-12-29 19:11:21 -08:00
tcp_ipv4.c [IPV4] TCPMD5: Use memmove() instead of memcpy() because we have overlaps. 2007-11-20 17:30:31 -08:00
tcp_lp.c [TCP]: congestion control API pass RTT in microseconds 2007-07-31 02:27:57 -07:00
tcp_minisocks.c [TCP]: Move sack_ok access to obviously named funcs & cleanup 2007-10-10 16:48:00 -07:00
tcp_output.c [TCP]: NAGLE_PUSH seems to be a wrong way around 2007-12-05 05:37:31 -08:00
tcp_probe.c [NET]: Make /proc/net per network namespace 2007-10-10 16:49:06 -07:00
tcp_scalable.c [TCP]: remove unused argument to cong_avoid op 2007-07-18 01:46:58 -07:00
tcp_timer.c [TCP]: Move sack_ok access to obviously named funcs & cleanup 2007-10-10 16:48:00 -07:00
tcp_vegas.c [TCP] vegas: Fix a bug in disabling slow start by gamma parameter. 2007-10-29 22:37:25 -07:00
tcp_vegas.h [TCP]: congestion control API pass RTT in microseconds 2007-07-31 02:27:57 -07:00
tcp_veno.c [TCP]: congestion control API pass RTT in microseconds 2007-07-31 02:27:57 -07:00
tcp_westwood.c [TCP]: congestion control API pass RTT in microseconds 2007-07-31 02:27:57 -07:00
tcp_yeah.c [TCP]: congestion control API pass RTT in microseconds 2007-07-31 02:27:57 -07:00
tcp.c [INET]: Remove per bucket rwlock in tcp/dccp ehash table. 2007-11-07 04:15:11 -08:00
tunnel4.c [INET]: Cleanup the xfrm4_tunnel_(un)register 2007-11-10 21:48:54 -08:00
udp_impl.h [UDP]: Randomize port selection. 2007-10-10 16:48:31 -07:00
udp.c [IPV4]: Use the {DEFINE|REF}_PROTO_INUSE infrastructure 2007-11-07 04:08:58 -08:00
udplite.c [IPV4]: Use the {DEFINE|REF}_PROTO_INUSE infrastructure 2007-11-07 04:08:58 -08:00
xfrm4_input.c [IPSEC]: Rename mode to outer_mode and add inner_mode 2007-10-17 21:35:51 -07:00
xfrm4_mode_beet.c [IPSEC]: Add missing BEET checks 2007-10-17 21:31:50 -07:00
xfrm4_mode_transport.c [IPSEC]: Use IPv6 calling convention as the convention for x->mode->output 2007-10-10 16:55:54 -07:00
xfrm4_mode_tunnel.c [IPSEC]: Add missing BEET checks 2007-10-17 21:31:50 -07:00
xfrm4_output.c [IPSEC]: Rename mode to outer_mode and add inner_mode 2007-10-17 21:35:51 -07:00
xfrm4_policy.c [IPSEC]: Rename mode to outer_mode and add inner_mode 2007-10-17 21:35:51 -07:00
xfrm4_state.c [IPSEC]: Store afinfo pointer in xfrm_mode 2007-10-17 21:33:12 -07:00
xfrm4_tunnel.c [IPSEC]: Move tunnel parsing for IPv4 out of xfrm4_input 2007-10-17 21:28:53 -07:00