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[0/3] net/virtio: make virtqueue struct cache-friendly

Message ID 20201221161456.31696-1-maxime.coquelin@redhat.com (mailing list archive)
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Maxime Coquelin Dec. 21, 2020, 4:14 p.m. UTC 
  This series optimizes the cache usage of virtqueue struct,
by make a "fake" mbuf being dynamically allocated in Rx
virtnet struct, by removing a useless virtuque pointer
into the virtnet structs and by moving a few fields
to pack holes.

With these 3 patches, the virtqueue struct size goes from
576 bytes (9 cachelines) to 248 bytes (4 cachelines).

Maxime Coquelin (3):
  net/virtio: remove reference to virtqueue in vrings
  net/virtio: allocate fake mbuf in Rx queue
  net/virtio: pack virtuqueue struct

 drivers/net/virtio/virtio_ethdev.c            | 46 +++++++++++--------
 drivers/net/virtio/virtio_rxtx.c              | 36 +++++++--------
 drivers/net/virtio/virtio_rxtx.h              |  5 +-
 drivers/net/virtio/virtio_rxtx_packed_avx.c   | 14 +++---
 drivers/net/virtio/virtio_rxtx_simple.h       |  2 +-
 .../net/virtio/virtio_rxtx_simple_altivec.c   |  2 +-
 drivers/net/virtio/virtio_rxtx_simple_neon.c  |  2 +-
 drivers/net/virtio/virtio_rxtx_simple_sse.c   |  2 +-
 .../net/virtio/virtio_user/virtio_user_dev.c  |  4 +-
 drivers/net/virtio/virtio_user_ethdev.c       |  2 +-
 drivers/net/virtio/virtqueue.h                | 24 ++++++----
 11 files changed, 72 insertions(+), 67 deletions(-)