Hello all:
This sereis tries to implement the VIRTIO_F_IN_ORDER to
virtio_ring. This is done by introducing virtqueue ops so we can
implement separate helpers for different virtqueue layout/features
then the in-order were implemented on top.
Tests shows 2%-19% imporvment with packed virtqueue PPS with KVM guest
vhost-net/testpmd on the host.
Changes since V3:
- Re-benchmark with the recent vhost-net in order support
- Rename the batched used id and length
- Other minor tweaks
Changes since V2:
- Fix build warning when DEBUG is enabled
Changes since V1:
- use const global array of function pointers to avoid indirect
branches to eliminate retpoline when mitigation is enabled
- fix used length calculation when processing used ids in a batch
- fix sparse warnings
Please review.
Thanks
Jason Wang (19):
virtio_ring: rename virtqueue_reinit_xxx to virtqueue_reset_xxx()
virtio_ring: switch to use vring_virtqueue in virtqueue_poll variants
virtio_ring: unify logic of virtqueue_poll() and more_used()
virtio_ring: switch to use vring_virtqueue for virtqueue resize
variants
virtio_ring: switch to use vring_virtqueue for virtqueue_kick_prepare
variants
virtio_ring: switch to use vring_virtqueue for virtqueue_add variants
virtio: switch to use vring_virtqueue for virtqueue_add variants
virtio_ring: switch to use vring_virtqueue for enable_cb_prepare
variants
virtio_ring: use vring_virtqueue for enable_cb_delayed variants
virtio_ring: switch to use vring_virtqueue for disable_cb variants
virtio_ring: switch to use vring_virtqueue for detach_unused_buf
variants
virtio_ring: use u16 for last_used_idx in virtqueue_poll_split()
virtio_ring: introduce virtqueue ops
virtio_ring: determine descriptor flags at one time
virtio_ring: factor out core logic of buffer detaching
virtio_ring: factor out core logic for updating last_used_idx
virtio_ring: factor out split indirect detaching logic
virtio_ring: factor out split detaching logic
virtio_ring: add in order support
drivers/virtio/virtio_ring.c | 902 +++++++++++++++++++++++++++--------
1 file changed, 690 insertions(+), 212 deletions(-)
--
2.39.5
