Did someone already manage to use DPDK on a GCP VM and have good performances? I am trying this configuration lately, have some awful bandwidth results and no idea what I could be doing wrong.

I use the VirtIO interfaces on my VMs, was able to use both the vfio-pci and igb_uio PMD. But can only get ~350Mbps (yes bits!) with both, when trying to transmit data with a very basic testpmd run.

dpdk-testpmd -a 0000:00:05.0 -- --forward-mode=txonly --stats-period 1

Any non-dpdk use of the network interface gives me way better results (GBps!).

Device:
00:05.0 Ethernet controller: Red Hat, Inc. Virtio network device

Bind status
Network devices using DPDK-compatible driver
============================================
0000:00:05.0 'Virtio network device 1000' drv=igb_uio unused=vfio-pci

I would bet I am doing something wrong, either with the PMD choice, or with some setting. But can't figure what. Did anyone manage to have good performances or some experience of using DPDK on a google cloud VM?

Thanks in advance
Sylvain