A short piece about reading the hidden intent behind the simple question "Why does a CPU throttle?"
April 15, 2026DevOps engineer at Channel.io, based in South Korea. Interested in Computer Networks, Cloud Native, and Homelab-ing. More about me →
Recent posts
- How would you answer "Why does a CPU throttle?"
- Istio Part 2: Ambient Mode Under the Hood via Envoy Configs
A deep dive into how Istio Ambient mode's HBONE tunneling and traffic redirection are implemented in Envoy configs.
April 14, 2026 - Istio Part 1: Why Istio Ambient Mode?
Introduction to why Channel.io's DevOps team chose Istio Ambient mode and how it works.
March 20, 2026 - Investigating Istio AuthorizationPolicy ext_authz in Envoy Config
Analyzing how Istio AuthorizationPolicy's action: CUSTOM works in Envoy config based on actual envoy config dump.
March 10, 2026 - A common Python async trap: one sync function that blocked the Liveness Probe
How calling a CPU-bound sync function inside an async endpoint blocked /v1/health
February 17, 2026