[agoodthrowaway]

How is that possible? Raw Bw of PCIE is around 200Gb/s.

[shaklee3]

Pcie4 (of which rome is) can do about 220Gbps realistically per card. Multiple cards, which I'm sure Netflix does, can go higher.

[agoodthrowaway]

True but usually it’s difficult to actually achieve that speed on the bus. Isn’t the NIC a bottleneck? Usually they aren’t capable of wirespeed due to shallow buffers.

[shaklee3]

It's doable. We do 100Gbps on pcie3, and AMD presented at the dpdk conference last year showing 200gbps: https://dpdkna2019.sched.com/event/WYAs/dpdk-and-pcie-gen4-b...