[PATCHv2] vhost-net: utilize PUBLISH_USED_IDX feature

Avi Kivity
Tue, 18 May 2010 17:47:19 -0000

On 05/18/2010 05:21 AM, Michael S. Tsirkin wrote:
> With PUBLISH_USED_IDX, guest tells us which used entries
> it has consumed. This can be used to reduce the number
> of interrupts: after we write a used entry, if the guest has not yet
> consumed the previous entry, or if the guest has already consumed the
> new entry, we do not need to interrupt.
> This imporves bandwidth by 30% under some workflows.
>

Seems to be missing the cacheline alignment.

Rusty's clarification did not satisfy me, I think it's needed.

--
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