alt Hacker NewsI mean, part of it is that Linux's default scheduler is braindead by modern standards: https://en.wikipedia.org/wiki/Completely_Fair_Scheduler
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ranger207 • today at 5:40 AM
A lot of scheduler experimentation has been enabled by sched_ext: https://lwn.net/Articles/922405/
Part of that is the assumption that Amazon/Meta/Google all have dedicated engineers who should be doing nothing but tuning performance for 0.0001% efficiency gains. At the scale of millions of servers, those tweaks add up to real dollar savings, and I suspect little of how they run is stock.