This series optimizes the cache usage of virtqueue struct, by making 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). Changes in v2: ============== - Rebase on latest main - Improve error path in virtio_init_queue - Fix various typos in commit messages Maxime Coquelin (4): net/virtio: remove reference to virtqueue in vrings net/virtio: improve queue init error path net/virtio: allocate fake mbuf in Rx queue net/virtio: pack virtuqueue struct drivers/net/virtio/virtio_ethdev.c | 68 ++++++++++++------- drivers/net/virtio/virtio_rxtx.c | 36 +++++----- drivers/net/virtio/virtio_rxtx.h | 5 +- drivers/net/virtio/virtio_rxtx_packed.c | 4 +- drivers/net/virtio/virtio_rxtx_packed.h | 6 +- drivers/net/virtio/virtio_rxtx_packed_avx.h | 4 +- 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 ++++--- 13 files changed, 88 insertions(+), 73 deletions(-) -- 2.29.2
