Zvi, Thanks, this looks promising, I will take a deeper look and see what I can get working. Really appreciate the pointer Regards John On Tue, Apr 28, 2020 at 6:52 PM Zvi Effron <zeffron@xxxxxxxxxxxxx> wrote: > > XDP just recently started supporting XDP. You will need their out-of-tree driver from https://github.com/amzn/amzn-drivers/. It does not support XDP_REDIRECT, and I don't think it supports AF_XDP, but it does support XDP_PASS, XDP_DROP, and XDP_TX. > > I have verified this today on a Fedora 31 based image, though it does require a few modifications to get the RPM to build. > > --Zvi > > On Tue, Apr 28, 2020 at 7:52 PM John McDowall <jmcdowall@xxxxxxxxxxxxxxxxxxxx> wrote: >> >> 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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