On Thu, Feb 16, 2023 at 7:50 PM Xuan Zhuo <xuanzhuo at linux.alibaba.com>
wrote:>
> On Thu, 16 Feb 2023 13:27:00 +0800, Jason Wang <jasowang at
redhat.com> wrote:
> > On Tue, Feb 14, 2023 at 3:27 PM Xuan Zhuo <xuanzhuo at
linux.alibaba.com> wrote:
> > >
> > > XDP socket(AF_XDP) is an excellent bypass kernel network
framework. The zero
> > > copy feature of xsk (XDP socket) needs to be supported by the
driver. The
> > > performance of zero copy is very good.
> > >
> > > ENV: Qemu with vhost.
> > >
> > > vhost cpu | Guest APP CPU |Guest Softirq CPU |
PPS
> > >
-----------------------------|---------------|------------------|------------
> > > xmit by sockperf: 90% | 100% | |
318967
> > > xmit by xsk: 100% | 30% | 33% |
1192064
> >
> > What's the setup of this test?
> >
> > CPU model/frequency, packet size, zerocopy enabled or not.
>
> Intel(R) Xeon(R) Platinum 8163 CPU @ 2.50GHz
>
> zerocopy: enabled
>
> size: 64
>
>
> >
> > (I remember I can get better performance with my old laptop through
> > pktgen (about 2Mpps))
>
> Let's compare sockperf just.
>
> The result of the test on Alibaba Cloud was 3.5M+PPS/60%cpu.
Just to make sure I understand here, the above said:
xmit by sockperf: 90% | 100% | | 318967
It's 0.3 Mpps, what's the difference between those two?
Thanks
>
> Thanks.
>
>
> >
> > Thanks
> >
> > > recv by sockperf: 100% | 68% | 100% |
692288
> > > recv by xsk: 100% | 33% | 43% |
771670
> > >
> > > Before achieving the function of Virtio-Net, we also have to let
virtio core
> > > support these features:
> > >
> > > 1. virtio core support premapped
> > > 2. virtio core support reset per-queue
> > > 3. introduce DMA APIs to virtio core
> > >
> > > Please review.
> > >
> > > Thanks.
> > >
> > > Xuan Zhuo (10):
> > > virtio_ring: split: refactor virtqueue_add_split() for
premapped
> > > virtio_ring: packed: separate prepare code from
> > > virtuque_add_indirect_packed()
> > > virtio_ring: packed: refactor virtqueue_add_packed() for
premapped
> > > virtio_ring: split: introduce virtqueue_add_split_premapped()
> > > virtio_ring: packed: introduce virtqueue_add_packed_premapped()
> > > virtio_ring: introduce virtqueue_add_inbuf_premapped()
> > > virtio_ring: add api virtio_dma_map() for advance dma
> > > virtio_ring: introduce dma sync api for virtio
> > > virtio_ring: correct the expression of the description of
> > > virtqueue_resize()
> > > virtio_ring: introduce virtqueue_reset()
> > >
> > > drivers/virtio/virtio_ring.c | 792
++++++++++++++++++++++++++++-------
> > > include/linux/virtio.h | 29 ++
> > > 2 files changed, 659 insertions(+), 162 deletions(-)
> > >
> > > --
> > > 2.32.0.3.g01195cf9f
> > >
> >
>