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[v4,net-next,0/5] xdp: introduce bulking for page_pool tx return path

Message ID cover.1604686496.git.lorenzo@kernel.org
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Series xdp: introduce bulking for page_pool tx return path | expand

Message

Lorenzo Bianconi Nov. 6, 2020, 6:19 p.m. UTC 
XDP bulk APIs introduce a defer/flush mechanism to return
pages belonging to the same xdp_mem_allocator object
(identified via the mem.id field) in bulk to optimize
I-cache and D-cache since xdp_return_frame is usually run
inside the driver NAPI tx completion loop.
Convert mvneta, mvpp2 and mlx5 drivers to xdp_return_frame_bulk APIs.

Changes since v3:
- align DEV_MAP_BULK_SIZE to XDP_BULK_QUEUE_SIZE
- refactor page_pool_put_page_bulk to avoid code duplication

Changes since v2:
- move mvneta changes in a dedicated patch

Changes since v1:
- improve comments
- rework xdp_return_frame_bulk routine logic
- move count and xa fields at the beginning of xdp_frame_bulk struct
- invert logic in page_pool_put_page_bulk for loop

Lorenzo Bianconi (5):
  net: xdp: introduce bulking for xdp tx return path
  net: page_pool: add bulk support for ptr_ring
  net: mvneta: add xdp tx return bulking support
  net: mvpp2: add xdp tx return bulking support
  net: mlx5: add xdp tx return bulking support

 drivers/net/ethernet/marvell/mvneta.c         |  5 +-
 .../net/ethernet/marvell/mvpp2/mvpp2_main.c   |  5 +-
 .../net/ethernet/mellanox/mlx5/core/en/xdp.c  |  5 +-
 include/net/page_pool.h                       | 26 ++++++++
 include/net/xdp.h                             | 11 +++-
 net/core/page_pool.c                          | 66 ++++++++++++++++---
 net/core/xdp.c                                | 56 ++++++++++++++++
 7 files changed, 160 insertions(+), 14 deletions(-)