Re: [Qemu-devel] Virtio Polling Mode

[Hu Yaohui]

Hi Anthony,

Thanks for your reply!

What I am looking for is that whether there is one mechanism that when virtio-blk host side finished the requests. Instead of using irq to notify the guest. Is there any other method to notify the guest (guest_notifer)?

Thanks for your time!

Best Wishes,

Yaohui Hu

On Mon, Sep 30, 2013 at 6:05 PM, Anthony Liguori <address@hidden> wrote:

On Mon, Sep 30, 2013 at 2:00 PM, Hu Yaohui <address@hidden> wrote:

Hi Anthony,

Thanks for your reply! Could you please be more specific about this? Which flag, 

You should read the virtio spec.  It's all clearly spelled out there.

 

where can I find the research projects and papers that has virtio ,especiall virtio-blk, working in polling mode.

Look for papers on the ELVIS project.

Regards,

Anthony Liguori
 

Thanks for your time!

Best Wishes,

Yaohui Hu

On Sat, Sep 28, 2013 at 8:54 AM, Anthony Liguori <address@hidden> wrote:

Hi Yaohui,

Yes, there is a flag associated both with the used and the avail rings to disable notifications.  This can be used to implement polling.

There have been multiple research projects/papers that have experimented with polling.

Regards,

Anthony Liguori

On Fri, Sep 27, 2013 at 1:56 PM, Hu Yaohui <address@hidden> wrote:

Hi All,

I am wondering whether virtio has provided polling mode already. Instead of sending a event from guest to host through eventfd on guest side and inject an interrupt into guest on host side to notify each other? Could both sides keep polling the Vring to communicate with each other?

Thanks for your time!

Best Wishes,

Yaohui