[PATCH net-next 0/9] TX used ring batched updating for vhost

From: Jason Wang
Date: Thu Jul 19 2018 - 20:15:30 EST


Hi:

This series implement batch updating of used ring for TX. This help to
reduce the cache contention on used ring. The idea is first split
datacopy path from zerocopy, and do only batching for datacopy. This
is because zercopy had already supported its own batching.

TX PPS was increased 25.8% and Netperf TCP does not show obvious
differences.

The split of datapath will also be helpful for future implementation
like in order completion.

Please review.

Thanks

Jason Wang (9):
vhost_net: drop unnecessary parameter
vhost_net: introduce helper to initialize tx iov iter
vhost_net: introduce vhost_exceeds_weight()
vhost_net: introduce get_tx_bufs()
vhost_net: introduce tx_can_batch()
vhost_net: split out datacopy logic
vhost_net: rename vhost_rx_signal_used() to vhost_net_signal_used()
vhost_net: rename VHOST_RX_BATCH to VHOST_NET_BATCH
vhost_net: batch update used ring for datacopy TX

drivers/vhost/net.c | 249 +++++++++++++++++++++++++++++++++++++---------------
1 file changed, 179 insertions(+), 70 deletions(-)

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2.7.4