… This visualizes that once the OS is tracking PSI, at around 2.5 cores , the act of Kubernetes reading those cgroup metrics is negligible to performance. Scenario 2: The Kernel Overhead Shifting gears, we evaluated the underlying overhead of enabling PSI on the Linux kernel also on a 4 core machine. …
… Cgroup v1 enters the maintenance mode As Kubernetes continues to evolve and adapt to the changing landscape of container orchestration, the community has decided to move cgroup v1 support into maintenance mode in v1.31. …
… Support for cgroups v2 Graduates to Stable It has been more than two years since the Linux kernel cgroups v2 API was declared stable. …
… This work was done as a part of KEP 4020 led by SIG API Machinery Memory QoS with cgroups v2 Kubernetes now enhances memory QoS on Linux cgroup v2 nodes with smarter, tiered memory protection that better aligns kernel controls with pod requests and limits, reducing interference and thrashing for wo… …