1. 17 Nov, 2008 5 commits
  2. 16 Nov, 2008 3 commits
  3. 14 Nov, 2008 4 commits
    • Eric Dumazet's avatar
      net: speedup dst_release() · ef711cf1
      Eric Dumazet authored
      During tbench/oprofile sessions, I found that dst_release() was in third position.
      
      CPU: Core 2, speed 2999.68 MHz (estimated)
      Counted CPU_CLK_UNHALTED events (Clock cycles when not halted) with a unit mask of 0x00 (Unhalted core cycles) count 100000
      samples  %        symbol name
      483726    9.0185  __copy_user_zeroing_intel
      191466    3.5697  __copy_user_intel
      185475    3.4580  dst_release
      175114    3.2648  ip_queue_xmit
      153447    2.8608  tcp_sendmsg
      108775    2.0280  tcp_recvmsg
      102659    1.9140  sysenter_past_esp
      101450    1.8914  tcp_current_mss
      95067     1.7724  __copy_from_user_ll
      86531     1.6133  tcp_transmit_skb
      
      Of course, all CPUS fight on the dst_entry associated with 127.0.0.1 
      
      Instead of first checking the refcount value, then decrement it,
      we use atomic_dec_return() to help CPU to make the right memory transaction
      (ie getting the cache line in exclusive mode)
      
      dst_release() is now at the fifth position, and tbench a litle bit faster ;)
      
      CPU: Core 2, speed 3000.1 MHz (estimated)
      Counted CPU_CLK_UNHALTED events (Clock cycles when not halted) with a unit mask of 0x00 (Unhalted core cycles) count 100000
      samples  %        symbol name
      647107    8.8072  __copy_user_zeroing_intel
      258840    3.5229  ip_queue_xmit
      258302    3.5155  __copy_user_intel
      209629    2.8531  tcp_sendmsg
      165632    2.2543  dst_release
      149232    2.0311  tcp_current_mss
      147821    2.0119  tcp_recvmsg
      137893    1.8767  sysenter_past_esp
      127473    1.7349  __copy_from_user_ll
      121308    1.6510  ip_finish_output
      118510    1.6129  tcp_transmit_skb
      109295    1.4875  tcp_v4_rcv
      Signed-off-by: default avatarEric Dumazet <dada1@cosmosbay.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      ef711cf1
    • Jarek Poplawski's avatar
      pkt_sched: Remove qdisc->ops->requeue() etc. · f30ab418
      Jarek Poplawski authored
      After implementing qdisc->ops->peek() and changing sch_netem into
      classless qdisc there are no more qdisc->ops->requeue() users. This
      patch removes this method with its wrappers (qdisc_requeue()), and
      also unused qdisc->requeue structure. There are a few minor fixes of
      warnings (htb_enqueue()) and comments btw.
      
      The idea to kill ->requeue() and a similar patch were first developed
      by David S. Miller.
      Signed-off-by: default avatarJarek Poplawski <jarkao2@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      f30ab418
    • Petr Tesarik's avatar
      tcp: remove an unnecessary field in struct tcp_skb_cb · 38a7ddff
      Petr Tesarik authored
      The urg_ptr field is not used anywhere and is merely confusing.
      Signed-off-by: default avatarPetr Tesarik <ptesarik@suse.cz>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      38a7ddff
    • Harvey Harrison's avatar
      isdn: use %pI4, remove get_{u8/u16/u32} and put_{u8/u16/u32} inlines · 00bcd522
      Harvey Harrison authored
      They would have been better named as get_be16, put_be16, etc.
      as they were hiding an endian shift inside.
      
      They don't add much over explicitly coding the byteshifting
      and gcc sometimes has a problem with builtin_constant_p inside
      inline functions, so it may do a better job of byteswapping
      at compile time rather than runtime.
      Signed-off-by: default avatarHarvey Harrison <harvey.harrison@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      00bcd522
  4. 13 Nov, 2008 11 commits
  5. 12 Nov, 2008 9 commits
  6. 11 Nov, 2008 8 commits