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  1. 27 8月, 2009 1 次提交
  3. 27 7月, 2009 6 次提交
  5. 14 7月, 2009 1 次提交
  7. 01 7月, 2009 2 次提交
  9. 08 6月, 2009 1 次提交
    • E
      net: skb_shared_info optimization · 042a53a9
      由 Eric Dumazet 提交于 
      skb_dma_unmap() is quite expensive for small packets,
because we use two different cache lines from skb_shared_info.

One to access nr_frags, one to access dma_maps[0]

Instead of dma_maps being an array of MAX_SKB_FRAGS + 1 elements,
let dma_head alone in a new dma_head field, close to nr_frags,
to reduce cache lines misses.

Tested on my dev machine (bnx2 & tg3 adapters), nice speedup !
Signed-off-by: NEric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      042a53a9
  11. 29 5月, 2009 1 次提交
  13. 27 5月, 2009 2 次提交
    • J
      igb: Record host memory receive overflow in net_stats · 3ea73afa
      由 Jesper Dangaard Brouer 提交于 
      Based on previous patch from Jesper Dangaard Brouer.

The RNBC (Receive No Buffers Count) register for the 82576, indicate
that frames were received when there were no available buffers in host
memory to store those frames (receive descriptor head and tail
pointers were equal).  The packet is still received by the NIC if
there is space in the FIFO on the NIC.

As the RNBC value is not a packet drop, the driver stores this value
in net_stats.rx_fifo_errors to indicate that there were no system
buffers available for the incoming packet.  Actual dropped packets
are counted in the MPC value.

Saving the stats in dev->net_stats makes it visible via
/proc/net/dev as "fifo", and thus viewable to ifconfig
as "overruns" and 'netstat -i' as "RX-OVR".

The Receive No Buffers Count (RNBC) can already be queried by
ethtool -S as "rx_no_buffer_count".
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>
CC: Jesper Dangaard Brouer <hawk@comx.dk>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      3ea73afa
    • J
      igb: Implement reading of reg RQDPC (Receive Queue Drop Packet Count) · 8c0ab70a
      由 Jesper Dangaard Brouer 提交于 
      Based on the previous patches from Jesper Dangaard Brouer <hawk@comx.dk>

Implement reading the per queue drop stats register
RQDPC (Receive Queue Drop Packet Count).  It counts the number of
packets dropped by a queue due to lack of descriptors available.

Notice RQDPC (Receive Queue Drop Packet Count) stats only gets
incremented, if the DROP_EN bit it set (in the SRRCTL register
for that queue).  If DROP_EN bit is NOT set, then the some what
equivalent count is stored in RNBC (not per queue basis).

The RQDPC register is only 12 bit, thus the precision might
suffer due to overrun in-netween the watchdog polling interval.
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>
CC: Jesper Dangaard Brouer <hawk@comx.dk>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      8c0ab70a
  15. 22 5月, 2009 1 次提交
  17. 08 5月, 2009 1 次提交
  19. 07 5月, 2009 2 次提交
  21. 28 4月, 2009 3 次提交
  23. 27 4月, 2009 1 次提交
  25. 22 4月, 2009 1 次提交
  27. 20 4月, 2009 1 次提交
  29. 11 4月, 2009 1 次提交
  31. 09 4月, 2009 1 次提交
  33. 07 4月, 2009 2 次提交
  35. 02 4月, 2009 3 次提交
  37. 22 3月, 2009 5 次提交
  39. 15 3月, 2009 4 次提交