Source
- URL: https://x.com/NOTimothyLottes/status/2072135292115427728
- Author: NOTimothyLottes (@NOTimothyLottes)
- Posted: 2026-07-01 01:48:46
Thread
1/ @NOTimothyLottes
Linux by default doesn’t allow any increase in scheduling priority. Users need to manually setup special user|group with elevated rights. Also system calls that try elevated scheduling don’t clamp, instead they fail -EPREM if out of bounds. So all around a pain in the ass.
2/ @NOTimothyLottes
I’m a little lazy right now and don’t feel like trying SteamOS big picture mode to see what the default ulimits are. Curious what they allow.
3/ @NOTimothyLottes
Linux priority workarounds
(a.) Use getrlimit() to get {soft,hard} limits
(b.) Use setrlimit() to set ‘soft=hard’ limit
(c.) Then set priority or nice based on new soft limit
4/ @NOTimothyLottes
I don’t do one-time global priority maximums, just in case someone sudo’s higher priority hard limit dynamically it should pickup the new limit.
5/ @NOTimothyLottes
Also while on setrlimit, I also bump up the RLIMIT_MEMLOCK to it’s maximum just in case before the mlockall().
