What’s the new cgroup v1 to v2 CPU conversion formula?

It’s a quadratic mapping hitting (2,1), (1024,100), (262144,10000). Turns 1024m into ~102 weight. Fixes priority and granularity.

Will this break my Kubernetes monitoring?

If it assumes old linear math, yes. Update tools expecting cpu.weight from shares.

Nope. OCI runtimes only: runc 1.3.2+, crun 1.23+.

🤖 AI Dev Tools

Kubernetes' old cgroup conversion was a joke. Now they've quadratic'd it into something usable. But watch your monitoring tools.

DevTools Feed Apr 03, 2026 3 min read

New quadratic formula fixes pod priority drops and granularity issues in cgroup v2. 𝕏
Impacts monitoring tools assuming old linear conversion—update now. 𝕏
OCI runtimes handle it; no Kubernetes changes needed for rollout. 𝕏

Published by

Ship faster. Build smarter.

#CPU weight conversion #Kubernetes CPU #OCI runtime #OCI runtimes #cgroup v2 #runc crun

Get the best Developer Tools stories of the week in your inbox — no noise, no spam.

Originally reported by Kubernetes Blog