Most packets follows the same nodes in the graph. You have some divergence (eg. ARP packets vs IP packets to forward), but the bulk of the traffic does not. So typically the initial batch of packets might be split in 2 with a small "control plane traffic" batch (eg. ARP) and a big "dataplane traffic" batch (IP packets to forward). You'll not do much SIMD on the small controlplane batch which is branchy anyway, but you do on the big dataplane batch, which is the bulk of the traffic.
And VPP is targeting high-end system and uses plenty of AVX512 (we demonstrated 1TBps of IPsec traffic on Intel Icelake for example). It's just very scalable to both small and big systems.
And VPP is targeting high-end system and uses plenty of AVX512 (we demonstrated 1TBps of IPsec traffic on Intel Icelake for example). It's just very scalable to both small and big systems.