this post was submitted on 02 Jul 2023
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So what I want to know is why do we still have programs that run on a single core when nearly every Windows PC out there is running a multi-core processor?
What are we missing to have the OS adapt any program to take advantage of the hardware?
You can't automatically adapt that. Multi thread safe programming takes extra work (or certain languages or frameworks that are able to optimize this). And even then, not all types of tasks make sense to multithread.
The OS still does take advantage of multiple cores, though. You never have just one process running. The OS will schedule different processes on different cores.