On Mon, Aug 26, 2024 at 11:06:09AM +0200, Dragos Tatulea wrote:
>
>
> On 23.08.24 18:54, Carlos Bilbao wrote:
> > Hello,
> >
> > I'm debugging my vDPA setup, and when using ioctl to retrieve the
> > configuration, I noticed that it's running in half duplex mode:
> >
> > Configuration data (24 bytes):
> > MAC address: (Mac address)
> > Status: 0x0001
> > Max virtqueue pairs: 8
> > MTU: 1500
> > Speed: 0 Mb
> > Duplex: Half Duplex
> > RSS max key size: 0
> > RSS max indirection table length: 0
> > Supported hash types: 0x00000000
> >
> > I believe this might be contributing to the underperformance of vDPA.
> mlx5_vdpa vDPA devicess currently do not support the VIRTIO_NET_F_SPEED_DUPLEX
> feature which reports speed and duplex. You can check the state on the
> PF.
Then it should probably report DUPLEX_UNKNOWN.
The speed of 0 also suggests SPEED_UNKNOWN is not being returned. So
this just looks buggy in general.
Andrew
