On Tue, Jan 09, 2018 at 07:34:17AM +0000, Yao, Lei A wrote:
>
>
> > -----Original Message-----
> > From: Chen, Junjie J
> > Sent: Tuesday, January 9, 2018 7:04 PM
> > To: [email protected]; [email protected]; Wang, Xiao W
> > <[email protected]>; Bie, Tiwei <[email protected]>; Yao, Lei A
> > <[email protected]>
> > Cc: [email protected]; Chen, Junjie J <[email protected]>
> > Subject: [PATCH v7] vhost: support virtqueue interrupt/notification
> > suppression
> >
> > The driver can suppress interrupt when VIRTIO_F_EVENT_IDX feature bit is
> > negotiated. The driver set vring flags to 0, and MAY use used_event in
> > available ring to advise device interrupt util reach an index specified
> > by used_event. The device ignore the lower bit of vring flags, and send
> > an interrupt when index reach used_event.
> >
> > The device can suppress notification in a manner analogous to the ways
> > driver suppress interrupt. The device manipulates flags or avail_event in
> > the used ring in the same way the driver manipulates flags or used_event in
> > available ring.
> >
> > Signed-off-by: Junjie Chen <[email protected]>
> Tested-by: Lei Yao <[email protected]>
Applied to dpdk-next-virtio.
Thanks.
--yliu
> VM2VM Iperf test has been executed with virtio-net driver after apply this
> patch.
> No performance drop.
> CPU: Intel(R) Xeon(R) CPU E5-2699 v4 @ 2.20GHz
> Host OS: Ubuntu 16.04
> Guest OS: Ubuntu 16.04
> Kernel: 4.4.0
