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, 17 Apr 2026 00:00:00 GMT https://josedavidbaena.com/blog/zero-copy/06-rdma-gpudirect-memory-topology https://josedavidbaena.com/blog/zero-copy/06-rdma-gpudirect-memory-topology RDMA and GPUDirect remove specific host copies, but real wins depend on registered memory, topology, congestion control, and observable fallbacks. Fri, 17 Apr 2026 00:00:00 GMT josedab@gmail.com (José David Baena) zero-copyrdmagpudirectperformancelinux