1. 27 9月, 2013 11 次提交
  2. 16 9月, 2013 1 次提交
  3. 12 9月, 2013 2 次提交
  4. 04 9月, 2013 7 次提交
  5. 30 8月, 2013 8 次提交
  6. 26 8月, 2013 1 次提交
  7. 09 8月, 2013 2 次提交
  8. 06 8月, 2013 4 次提交
  9. 03 8月, 2013 1 次提交
  10. 02 8月, 2013 3 次提交
    • N
      bonding: initial RCU conversion · 278b2083
      nikolay@redhat.com 提交于
      This patch does the initial bonding conversion to RCU. After it the
      following modes are protected by RCU alone: roundrobin, active-backup,
      broadcast and xor. Modes ALB/TLB and 3ad still acquire bond->lock for
      reading, and will be dealt with later. curr_active_slave needs to be
      dereferenced via rcu in the converted modes because the only thing
      protecting the slave after this patch is rcu_read_lock, so we need the
      proper barrier for weakly ordered archs and to make sure we don't have
      stale pointer. It's not tagged with __rcu yet because there's still work
      to be done to remove the curr_slave_lock, so sparse will complain when
      rcu_assign_pointer and rcu_dereference are used, but the alternative to use
      rcu_dereference_protected would've created much bigger code churn which is
      more difficult to test and review. That will be converted in time.
      
      1. Active-backup mode
       1.1 Perf recording while doing iperf -P 4
        - old bonding: iperf spent 0.55% in bonding, system spent 0.29% CPU
                       in bonding
        - new bonding: iperf spent 0.29% in bonding, system spent 0.15% CPU
                       in bonding
       1.2. Bandwidth measurements
        - old bonding: 16.1 gbps consistently
        - new bonding: 17.5 gbps consistently
      
      2. Round-robin mode
       2.1 Perf recording while doing iperf -P 4
        - old bonding: iperf spent 0.51% in bonding, system spent 0.24% CPU
                       in bonding
        - new bonding: iperf spent 0.16% in bonding, system spent 0.11% CPU
                       in bonding
       2.2 Bandwidth measurements
        - old bonding: 8 gbps (variable due to packet reorderings)
        - new bonding: 10 gbps (variable due to packet reorderings)
      
      Of course the latency has improved in all converted modes, and moreover
      while
      doing enslave/release (since it doesn't affect tx anymore).
      
      Also I've stress tested all modes doing enslave/release in a loop while
      transmitting traffic.
      Signed-off-by: NNikolay Aleksandrov <nikolay@redhat.com>
      Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      278b2083
    • N
      bonding: factor out slave id tx code and simplify xmit paths · 15077228
      Nikolay Aleksandrov 提交于
      I factored out the tx xmit code which relies on slave id in
      bond_xmit_slave_id. It is global because later it can be used also in
      3ad mode xmit. Unnecessary obvious comments are removed. Active-backup
      mode is simplified because bond_dev_queue_xmit always consumes the skb.
      bond_xmit_xor becomes one line because of bond_xmit_slave_id.
      bond_for_each_slave_from is not used in bond_xmit_slave_id because later
      when RCU is used we can avoid important race condition by using standard
      rculist routines.
      Signed-off-by: NNikolay Aleksandrov <nikolay@redhat.com>
      Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      15077228
    • N
      bonding: simplify broadcast_xmit function · 78a646ce
      Nikolay Aleksandrov 提交于
      We don't need to start from the curr_active_slave as the frame will be
      sent to all eligible slaves anyway, so we remove the unnecessary local
      variables, checks and comments, and make it use the standard list API.
      This has the nice side-effect that later when it's converted to RCU
      a race condition will be avoided which could lead to double packet tx.
      Signed-off-by: NNikolay Aleksandrov <nikolay@redhat.com>
      Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      78a646ce
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