On 2016年06月30日 23:45, Michael S. Tsirkin wrote:
On Thu, Jun 30, 2016 at 02:45:30PM +0800, Jason Wang wrote:
>Hi all:
>
>This series tries to switch to use skb array in tun. This is used to
>eliminate the spinlock contention between producer and consumer. The
>conversion was straightforward: just introdce a tx skb array and use
>it instead of sk_receive_queue.
>
>A minor issue is to keep the tx_queue_len behaviour, since tun used to
>use it for the length of sk_receive_queue. This is done through:
>
>- add the ability to resize multiple rings at once to avoid handling
> partial resize failure for mutiple rings.
>- add the support for zero length ring.
>- introduce a notifier which was triggered when tx_queue_len was
> changed for a netdev.
>- resize all queues during the tx_queue_len changing.
>
>Tests shows about 15% improvement on guest rx pps:
>
>Before: ~1300000pps
>After : ~1500000pps
Acked-by: Michael S. Tsirkin<mst@xxxxxxxxxx>
Acked-from-altitude: 34697 feet.
Wow, thanks a lot!
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