David, Thanks for the quick reply - I assumed that this was the answer. The good news is that I see almost 8Gbps in xdpgeneric mode. Regards John On Tue, Apr 28, 2020 at 10:19 AM David Ahern <dsahern@xxxxxxxxx> wrote: > > On 4/28/20 11:11 AM, John McDowall wrote: > > Hi, > > > > I am running the XDP redirect example on Google Cloud Platform using > > the GCP provided Ubuntu 20.04 image as my host. The code works fine in > > SKB_MODE (xdpgeneric). When I go to DRV_MODE I get the following error > > message: "libbpf: Kernel error message: virtio_net: XDP expects > > header/data in single page, any_header_sg required". > > The most likely explanation is an old machine model for the VM. > > But that is just the first step. Once the VM model is updated to > something modern, the cloud provider needs to enable multiqueue for the > tap device with the number of queues = 2 * vcpus for each tap device. > e.g., a 4 vcpu VM needs 8 queues per tap device that xdp is to be allowed. > > > > > For all images on GCP that I have looked at the number of RX and TX > > channels are set to 0 and the combined is the number of cores (ethtool > > -l dev). My question is then, is there any way to run XDP native on > > GCP images or do I need to try and create a custom image with re and > > tx queues set? > > > > Second question, does anyone have experience running native XDP on AWS > > and Azure? > > > > last I looked AWS does not support XDP either. Never tried Azure.
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