https://josedavidbaena.com Personal website and blog where I document thoughts, ideas, and interests in software engineering, web performance, and open source technologies. en-us josedab@gmail.com (José David Baena) josedab@gmail.com (José David Baena) Fri, 03 Apr 2026 00:00:00 GMT https://josedavidbaena.com/blog/zero-copy/04-af-xdp-dpdk-kernel-boundary https://josedavidbaena.com/blog/zero-copy/04-af-xdp-dpdk-kernel-boundary AF_XDP and DPDK move the kernel boundary to different places. Choose by queue ownership, transport semantics, NUMA locality, and rollback cost. Fri, 03 Apr 2026 00:00:00 GMT josedab@gmail.com (José David Baena) zero-copynetworkinglinuxperformancedpdk https://josedavidbaena.com/blog/zero-copy/03-io-uring-zero-copy-receive https://josedavidbaena.com/blog/zero-copy/03-io-uring-zero-copy-receive Stable io_uring receive cuts syscall and buffer overhead. ZCRX can remove the copy, but only by turning RX memory into a buffer-ownership contract. Fri, 27 Mar 2026 00:00:00 GMT josedab@gmail.com (José David Baena) io-uringlinuxzero-copynetworkingperformance https://josedavidbaena.com/blog/zero-copy/01-philosophy-not-technique https://josedavidbaena.com/blog/zero-copy/01-philosophy-not-technique Trace each byte owner, separate Linux transfer mechanisms, and decide when copy avoidance earns its lifetime, fallback, and observability costs. Fri, 13 Mar 2026 00:00:00 GMT josedab@gmail.com (José David Baena) zero-copyperformancesystemslinuxnetworking