Networking

• Kernel Bypass Networking: DPDK, io_uring, and the RDMA Revolution · 2025-02-10

  Dive into how modern systems escape the kernel networking stack for microsecond-scale performance: DPDK's poll-mode drivers, io_uring's submission rings, RDMA's one-sided operations, and the trade-offs each approach demands.

• TCP Congestion Control: From Slow Start to BBR · 2023-02-11

  A comprehensive exploration of TCP congestion control algorithms, from classic approaches like Tahoe and Reno to modern innovations like BBR. Learn how these algorithms balance throughput, fairness, and latency across diverse network conditions.

• Large Deviations Theory: Cramér's Theorem, Importance Sampling, and Rare Event Simulation · 2022-02-13

  A rigorous exploration of large deviations—the theory of exponentially rare events—from Cramér's theorem to Sanov's theorem, and their application to importance sampling for reliable networks.

• User-Space Networking: Snabb Switch, FD.io VPP (Vector Packet Processing), AF_XDP, and the Philosophy of Kernel Bypass · 2021-05-14

  A deep exploration of user-space networking — how Snabb, VPP, and AF_XDP achieve line-rate packet processing by bypassing the kernel, and the architectural trade-offs of moving the network data plane into user space.

• eBPF Internals: The In-Kernel Verifier, Safety Proofs, JIT Compilation to Native Code, Map Types, and XDP/TC Hooks · 2021-05-08

  A deep exploration of eBPF internals — how the Linux kernel verifier proves safety, the JIT compilers that turn BPF bytecode into native instructions, the map infrastructure that enables stateful processing, and the XDP/TC hooks that make programmable networking possible.

• Network Sockets and the TCP/IP Stack: How Data Travels Across Networks · 2020-11-08

  A comprehensive exploration of network programming internals, from socket system calls through the TCP/IP protocol stack to the network interface. Understand connection establishment, flow control, and the kernel's role in networking.