Bilibili Tech
Dec 27, 2022 · Operations
Optimizing QUIC Gateway Performance with AF_XDP
Bilibili’s video CDN replaced its traditional TCP‑based gateway with a QUIC/HTTP‑3 gateway and, to curb the extra CPU load caused by complex UDP handling, adopted AF_XDP kernel‑bypass sockets that redirect packets via XDP, cutting CPU usage by about half, raising peak bandwidth to roughly 9 Gbps and improving per‑bandwidth efficiency by up to 30 %.
AF_XDPLinux KernelQUIC
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