Topic

tcp_nodelay

2 posts

Plate 42

TCP_QUICKACK Lab: Delayed ACK, Set-Once, and the Reassert Trap

Hands-on TCP_QUICKACK lab: default QA=1 on loopback; WWR set-once ~18 µs; reassert QA=1 under Nagle p95 ~48 ms, OutSegs ~13×. Real numbers, no Docker.

Summary30 Sept 2026 · 7 min

Plate 51

TCP_NODELAY vs Nagle: Localhost Lab with Real Numbers

Hands-on TCP_NODELAY vs Nagle: 1-byte reuse 124k vs 73k RPS; 32×16B writes favor Nagle (~1.7× fewer OutSegs). Delayed-ACK mean trap on localhost.

Observability & SRELab30 Sept 2026 · 6 min