Will a dedicated core for OS bring more stability to general OS use?

https://news.ycombinator.com/item?id=22407239

by vijaybritto • 6 years ago

2 1 6 years ago

news.ycombinator.com

If we have a seperate core that runs kernel code and user code is only allowed to run on other cores, would it result in stable computers? For ex: one low powered core for windows 4 high powered or mixed cores for user tasks. Is this a feasible design? Has it been attempted in the past?

LinuxBender• 6 years ago

Title should contain "Ask HN".

What do you mean by stable? Typically people will set CPU affinity when they are optimizing for applications that very heavily depend on L1/L2 cache or to reduce interrupts. You will probably find similar questions on stackexchange [1] or serverfault [2] and most appropriate would be [3] superuser.com. Best to ask on SuperUser to avoid being marked down.

Stability is usually related to kernel or application bugs. CPU affinity and priority will only help applications in that regard if the bug can induce high CPU load. Affinity will not mitigate kernel bugs.

It is probably best to let your kernel handle process scheduling unless you have a specific need otherwise.

[1] https://unix.stackexchange.com/

[2] https://serverfault.com/

[3] https://superuser.com/

Will a dedicated core for OS bring more stability to general OS use?

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