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Subject[PATCH net-next RFC 0/5] batched tx processing in vhost_net

This series tries to implement basic tx batched processing. This is
done by prefetching descriptor indices and update used ring in a
batch. This intends to speed up used ring updating and improve the
cache utilization. Test shows about ~22% improvement in tx pss.

Please review.

Jason Wang (5):
vhost: split out ring head fetching logic
vhost: introduce helper to prefetch desc index
vhost: introduce vhost_add_used_idx()
vhost_net: rename VHOST_RX_BATCH to VHOST_NET_BATCH
vhost_net: basic tx virtqueue batched processing

drivers/vhost/net.c | 221 ++++++++++++++++++++++++++++----------------------
drivers/vhost/vhost.c | 165 +++++++++++++++++++++++++++++++------
drivers/vhost/vhost.h | 9 ++
3 files changed, 270 insertions(+), 125 deletions(-)


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