May or may not apply -- possibly not relevant for Skylake or newer. Needs investigation.
Description
Description
| Status | Subtype | Assigned | Task | ||
|---|---|---|---|---|---|
| Resolved | Clement_Goubert | T332788 Set scaling_governor to performance for wikikube workers | |||
| Resolved | kamila | T333317 Investigate whether configuring hardware P-states would help with performance on k8s |
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TL;DR: "It's probably fine."
We currently have the following processors on our k8s nodes:
kubernetes[2018-2024].codfw.wmnet,kubernetes[1018-1024].eqiad.wmnet: Intel(R) Xeon(R) Silver 4210R CPU @ 2.40GHz kubernetes[2007-2014,2017].codfw.wmnet,kubernetes[1007-1014,1017].eqiad.wmnet: Intel(R) Xeon(R) Silver 4214 CPU @ 2.20GHz
These use Intel SpeedShift, which should behave correctly since kernel 4.10.
The CPU scaling driver and governor are set correctly:
----- OUTPUT of 'cat /sys/devices...q/scaling_driver' ----- intel_pstate ----- OUTPUT of 'cat /sys/devices...scaling_governor' ----- performance
I am not an expert on this topic, so let me know if this sounds wrong to you. If it sounds right, I suppose we can close this.