128k performance is not good as kTCP #vpp #mellanox


Hello, I'm working on SPDK library + VPP, because some report said that VPP reduces the overhead of network. When I test with VPP (with mlx5 poll mode driver mtu 9000) and null device with spdk, 4k performance with VPP is much better than the default(kTCP). But, 128k write performance with VPP is 30 percent lower than the one with kTCP. Is there anyone know why 128k write performance with VPP is not good as kernel ? I increase Multi thread or num-rx-desc and there is improvment, but it still lower than kernel. Is there also build option related to performance? Thanks in advance.

Join vpp-dev@lists.fd.io to automatically receive all group messages.