I sthere a ready to use implementation to model MCS in the PF/RR scheduler files?

[Angèle Hager Hafaiedh]

Or should I implement it manually?

[Gabriel Ferreira]

I have no idea what you mean by that. Can you be more clear on what exactly you want to do?
(tip: if your english isn't that good, ask chatgpt/perplexity/grok/etc to translate it from your native language. it helps to convey the meaning, while google translate is a disaster)