1. 30 Sep, 2010 7 commits
  2. 29 Sep, 2010 11 commits
    • Eric Dumazet's avatar
      net: rename netdev rx_queue to ingress_queue · bfa5ae63
      Eric Dumazet authored
      
      
      There is some confusion with rx_queue name after RPS, and net drivers
      private rx_queue fields.
      
      I suggest to rename "struct net_device"->rx_queue to ingress_queue.
      Signed-off-by: default avatarEric Dumazet <eric.dumazet@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      bfa5ae63
    • Eric Dumazet's avatar
      ip6tnl: percpu stats accounting · 8560f226
      Eric Dumazet authored
      
      
      Maintain per_cpu tx_bytes, tx_packets, rx_bytes, rx_packets.
      
      Other seldom used fields are kept in netdev->stats structure, possibly
      unsafe.
      
      This is a preliminary work to support lockless transmit path, and
      correct RX stats, that are already unsafe.
      Signed-off-by: default avatarEric Dumazet <eric.dumazet@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      8560f226
    • Eric Dumazet's avatar
      ipip: enable lockless xmits · 153f0943
      Eric Dumazet authored
      
      
      IPIP tunnels can benefit from lockless xmits, using NETIF_F_LLTX
      
      Bench on a 16 cpus machine (dual E5540 cpus), 16 threads sending
      10000000 UDP frames via one ipip tunnel (size:200 bytes per frame)
      
      Before patch :
      real	2m53.321s
      user	0m10.277s
      sys	46m0.597s
      
      After patch:
      real	0m32.063s
      user	0m9.237s
      sys	8m16.255s
      
      Last problem to solve is the contention on dst :
      
      16118.00 28.3% __ip_route_output_key         vmlinux
       6135.00 10.8% dst_release                   vmlinux
       3220.00  5.6% ip_finish_output              vmlinux
       2149.00  3.8% ip_route_output_flow          vmlinux
       1575.00  2.8% ip_append_data                vmlinux
       1481.00  2.6% ip_push_pending_frames        vmlinux
       1349.00  2.4% __xfrm_lookup                 vmlinux
       1216.00  2.1% csum_partial_copy_generic     vmlinux
       1208.00  2.1% udp_sendmsg                   vmlinux
      Signed-off-by: default avatarEric Dumazet <eric.dumazet@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      153f0943
    • Eric Dumazet's avatar
      ip_gre: lockless xmit · b790e01a
      Eric Dumazet authored
      
      
      GRE tunnels can benefit from lockless xmits, using NETIF_F_LLTX
      
      Note: If tunnels are created with the "oseq" option, LLTX is not
      enabled :
      
      Even using an atomic_t o_seq, we would increase chance for packets being
      out of order at receiver.
      
      Bench on a 16 cpus machine (dual E5540 cpus), 16 threads sending
      10000000 UDP frames via one gre tunnel (size:200 bytes per frame)
      
      Before patch :
      real	3m0.094s
      user	0m9.365s
      sys	47m50.103s
      
      After patch:
      real	0m29.756s
      user	0m11.097s
      sys	7m33.012s
      
      Last problem to solve is the contention on dst :
      
      38660.00 21.4% __ip_route_output_key          vmlinux
      20786.00 11.5% dst_release                    vmlinux
      14191.00  7.8% __xfrm_lookup                  vmlinux
      12410.00  6.9% ip_finish_output               vmlinux
       4540.00  2.5% ip_push_pending_frames         vmlinux
       4427.00  2.4% ip_append_data                 vmlinux
       4265.00  2.4% __alloc_skb                    vmlinux
       4140.00  2.3% __ip_local_out                 vmlinux
       3991.00  2.2% dev_queue_xmit                 vmlinux
      Signed-off-by: default avatarEric Dumazet <eric.dumazet@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      b790e01a
    • Eric Dumazet's avatar
      sit: enable lockless xmits · 8df40d10
      Eric Dumazet authored
      
      
      SIT tunnels can benefit from lockless xmits, using NETIF_F_LLTX
      
      Bench on a 16 cpus machine (dual E5540 cpus), 16 threads sending
      10000000 UDP frames via one sit tunnel (size:220 bytes per frame)
      
      Before patch :
      
      real	3m15.399s
      user	0m9.185s
      sys	51m55.403s
      
      75029.00 87.5% _raw_spin_lock            vmlinux
       1090.00  1.3% dst_release               vmlinux
        902.00  1.1% dev_queue_xmit            vmlinux
        627.00  0.7% sock_wfree                vmlinux
        613.00  0.7% ip6_push_pending_frames   ipv6.ko
        505.00  0.6% __ip_route_output_key     vmlinux
      
      After patch:
      
      real	1m1.387s
      user	0m12.489s
      sys	15m58.868s
      
      28239.00 23.3% dst_release               vmlinux
      13570.00 11.2% ip6_push_pending_frames   ipv6.ko
      13118.00 10.8% ip6_append_data           ipv6.ko
       7995.00  6.6% __ip_route_output_key     vmlinux
       7924.00  6.5% sk_dst_check              vmlinux
       5015.00  4.1% udpv6_sendmsg             ipv6.ko
       3594.00  3.0% sock_alloc_send_pskb      vmlinux
       3135.00  2.6% sock_wfree                vmlinux
       3055.00  2.5% ip6_sk_dst_lookup         ipv6.ko
       2473.00  2.0% ip_finish_output          vmlinux
      Signed-off-by: default avatarEric Dumazet <eric.dumazet@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      8df40d10
    • Eric Dumazet's avatar
      sit: fix percpu stats accounting · dd4080ee
      Eric Dumazet authored
      commit 15fc1f70
      
       (sit: percpu stats accounting) forgot the fallback
      tunnel case (sit0), and can crash pretty fast.
      Signed-off-by: default avatarEric Dumazet <eric.dumazet@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      dd4080ee
    • Eric Dumazet's avatar
      ipip: fix percpu stats accounting · fada5636
      Eric Dumazet authored
      commit 3c97af99
      
       (ipip: percpu stats accounting) forgot the fallback
      tunnel case (tunl0), and can crash pretty fast.
      Signed-off-by: default avatarEric Dumazet <eric.dumazet@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      fada5636
    • Eric Dumazet's avatar
      dummy: percpu stats and lockless xmit · 6d81f41c
      Eric Dumazet authored
      
      
      Converts dummy network device driver to :
      
      - percpu stats
      
      - 64bit stats
      
      - lockless xmit (NETIF_F_LLTX)
      
      - performance features added (NETIF_F_SG | NETIF_F_FRAGLIST |
      NETIF_F_TSO | NETIF_F_NO_CSUM | NETIF_F_HIGHDMA)
      Signed-off-by: default avatarEric Dumazet <eric.dumazet@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      6d81f41c
    • Eric Dumazet's avatar
      net: add a recursion limit in xmit path · 745e20f1
      Eric Dumazet authored
      
      
      As tunnel devices are going to be lockless, we need to make sure a
      misconfigured machine wont enter an infinite loop.
      
      Add a percpu variable, and limit to three the number of stacked xmits.
      Reported-by: default avatarJesse Gross <jesse@nicira.com>
      Signed-off-by: default avatarEric Dumazet <eric.dumazet@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      745e20f1
    • Maciej Żenczykowski's avatar
      ipv6: Implement Any-IP support for IPv6. · ab79ad14
      Maciej Żenczykowski authored
      
      
      AnyIP is the capability to receive packets and establish incoming
      connections on IPs we have not explicitly configured on the machine.
      
      An example use case is to configure a machine to accept all incoming
      traffic on eth0, and leave the policy of whether traffic for a given IP
      should be delivered to the machine up to the load balancer.
      
      Can be setup as follows:
        ip -6 rule from all iif eth0 lookup 200
        ip -6 route add local default dev lo table 200
      (in this case for all IPv6 addresses)
      Signed-off-by: default avatarMaciej Żenczykowski <maze@google.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      ab79ad14
    • Tom Herbert's avatar
      ipv4: Allow configuring subnets as local addresses · 4465b469
      Tom Herbert authored
      
      
      This patch allows a host to be configured to respond to any address in
      a specified range as if it were local, without actually needing to
      configure the address on an interface.  This is done through routing
      table configuration.  For instance, to configure a host to respond
      to any address in 10.1/16 received on eth0 as a local address we can do:
      
      ip rule add from all iif eth0 lookup 200
      ip route add local 10.1/16 dev lo proto kernel scope host src 127.0.0.1 table 200
      
      This host is now reachable by any 10.1/16 address (route lookup on
      input for packets received on eth0 can find the route).  On output, the
      rule will not be matched so that this host can still send packets to
      10.1/16 (not sent on loopback).  Presumably, external routing can be
      configured to make sense out of this.
      
      To make this work, we needed to modify the logic in finding the
      interface which is assigned a given source address for output
      (dev_ip_find).  We perform a normal fib_lookup instead of just a
      lookup on the local table, and in the lookup we ignore the input
      interface for matching.
      
      This patch is useful to implement IP-anycast for subnets of virtual
      addresses.
      Signed-off-by: default avatarTom Herbert <therbert@google.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      4465b469
  3. 28 Sep, 2010 22 commits