Hi Michael,
Again, as usual, sorry for being late :/
On Wed, Feb 22, 2017 at 06:27:11AM +0200, Michael S. Tsirkin wrote:
> Stage 2: prototype guest/host drivers
>
> At this stage we need real guest and host drivers
> to be able to test real life performance.
> I suggest dpdk drivers + munimal hack in qemu to
> pass features around.
>
I have already done that in last Nov. I made a very rough (yet hacky)
version (only with Tx path) in one day while companying my wife in
hospital.
If someone are interested in, I could share the code soon. I could
even cleanup the code a bit if necessary.
> Tasks:
>
> - implement vhost-user support in dpdk
> - implement virtio support in dpdk
> - implement minimal stub in qemu
I didn't hack the QEMU, instead, I hacked the DPDK virtio-user, yet
another virtio-net emulation. It's simpler and quicker for me.
And here is my plan on virtio 1.1:
- Look deeper inside the virtio net performance issues (WIP)
It's basically a job about digging the DPDK vhost/virtio code
deeper, something like how exactly the cache acts while Tx/Rx
pkts, what can be optimized by implementation, and what could
be improved with the help of spec extension.
Please note that I often got interrupted on this task: it didn't
go smooth as I would have expected.
- Try to accelerate vhost/virtio with vector instructions.
Something I will look into when above item is done. Currently,
I thought of two items may help the vector implementation:
* what kind of vring and desc layout could make the vector
implementation easier.
* what kind of hint we need from virtio spec for (dynamically)
enabling the vector path.
Besides that, I don't have too much clue yet.
--yliu
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