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.
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
> >
>