Hey David, Thank you for your response!The VM only has one CPU right now. It's possible the cluster has 8 RX queues I'd imagine, but I don't have that information sadly. I executed the same command on another VM I have with two CPUs (not being used for the XDP-native testing):
``` root@Test:~# ethtool -l ens3 Channel parameters for ens3: Pre-set maximums: RX: 0 TX: 0 Other: 0 Combined: 8 Current hardware settings: RX: 0 TX: 0 Other: 0 Combined: 2 ```I did receive this from my hosting provider when asking which NIC driver they use:
``` Hello, Thanks for your inquiry. We do not pass through the host node's NIC to your VPS.Because of that, it's not relevant what NIC driver we are using on our host nodes.
Thanks for your patience. ```To my understanding, if the NIC isn't offloading packets directly to our VPS, wouldn't this destroy the purpose of using XDP-native over XDP-generic/SKB mode for performance in our case? I was under the assumption that was the point of XDP-native. If so, I'm not sure why the program is loading with XDP-native without any issues besides the AF_XDP program.
I will admit I've been wondering what the difference is between `XDP_FLAGS_DRV_MODE` (XDP-native) and `XDP_FLAGS_HW_MODE` since I thought XDP-native was offloading packets from the NIC.
Thank you for the help! On 5/24/2020 12:35 PM, David Ahern wrote:
On 5/22/20 10:12 AM, Christian Deacon wrote:Hey Jesper, I apologize for not providing that information before. The driver is `virtio_net`. Unfortunately, I'm not sure what the NIC driver on the cluster is. Once my program's code is confirmed to be correct, I will try reaching out to our hosting provider to see if they can provide this information if the NIC's driver is the suspected cause to this issue. ``` root@SEAV21:~/AF_XDP-Test# ethtool -i ens3 driver: virtio_net version: 1.0.0 firmware-version: expansion-rom-version: bus-info: 0000:00:03.0 supports-statistics: yes supports-test: no supports-eeprom-access: no supports-register-dump: no supports-priv-flags: no ```Is this a 4-cpu VM or 8 cpu VM? A previous response had: root@SEAV21:~/AF_XDP-Test# ethtool -l ens3 Channel parameters for ens3: Pre-set maximums: RX: 0 TX: 0 Other: 0 Combined: 8 Current hardware settings: RX: 0 TX: 0 Other: 0 Combined: 1 The 8 for pre-set max says the nic has 8 queues. If it is a 4-vcpu vm, then try ethtool -L ens3 combined 4 which leaves 4 for xdp. If it is an 8 cpu VM I believe you are out of luck given current requirements.
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