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[net-next,v2,0/3] i40e driver performance tweaks for AF_XDP

Message ID 20200825113556.18342-1-bjorn.topel@gmail.com
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Series i40e driver performance tweaks for AF_XDP | expand

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Björn Töpel Aug. 25, 2020, 11:35 a.m. UTC 
This series contains three patches worth of driver tweaks for the i40e
AF_XDP Rx path, that in total improves the Rx performance (rx_drop 64B
packets-per-second) with 9%.

Please refer to the individual commits for more details.

v1->v2: Removed the napi budget increase patch [1]. Instead, that will
        be sent out as a more generic series that addresses all AF_XDP
        zero-copy capable drivers, as suggested by Jakub. [2]

Cheers,
Björn

[1] https://lore.kernel.org/netdev/20200702153730.575738-4-bjorn.topel@gmail.com/
[2] https://lore.kernel.org/netdev/20200728131653.3b90336b@kicinski-fedora-pc1c0hjn.dhcp.thefacebook.com/


Björn Töpel (3):
  i40e, xsk: remove HW descriptor prefetch in AF_XDP path
  i40e: use 16B HW descriptors instead of 32B
  i40e, xsk: move buffer allocation out of the Rx processing loop

 drivers/net/ethernet/intel/i40e/i40e.h        |  2 +-
 .../net/ethernet/intel/i40e/i40e_debugfs.c    | 10 ++++----
 drivers/net/ethernet/intel/i40e/i40e_main.c   |  4 ++--
 drivers/net/ethernet/intel/i40e/i40e_trace.h  |  6 ++---
 drivers/net/ethernet/intel/i40e/i40e_txrx.c   | 19 ++++++++++++---
 drivers/net/ethernet/intel/i40e/i40e_txrx.h   |  2 +-
 .../ethernet/intel/i40e/i40e_txrx_common.h    | 13 ----------
 drivers/net/ethernet/intel/i40e/i40e_type.h   |  5 +++-
 drivers/net/ethernet/intel/i40e/i40e_xsk.c    | 24 ++++++++++++-------
 9 files changed, 47 insertions(+), 38 deletions(-)


base-commit: 079f921e9f4d3992968a2fc5dc3af0a3540853cc