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SubjectRe: [PATCH net-next 0/9] TX used ring batched updating for vhost
On Fri, Jul 20, 2018 at 08:15:12AM +0800, Jason Wang wrote:
> 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

Acked-by: Michael S. Tsirkin <mst@redhat.com>

I'm very happy with the split, the mixed data path became hard to
maintain.

> 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(-)
>
> --
> 2.7.4

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