this post was submitted on 30 Nov 2023
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335
Yes, you can have too many CPU cores - Ampere's 192-core chips break ARM64 Linux kernel in two-socket systems, company requests higher core count support (www.tomshardware.com)
submitted 1 year ago by [email protected] to c/[email protected]
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[โ€“] [email protected] 1 points 1 year ago* (last edited 1 year ago) (1 children)

Unfortunately these kludge solutions that last a few years have a tendency to ripple more kludge solutions when they run out, because the "proper" fix still wasn't done. Shit that doesn't work, but needs to work, gets high priority. Shit that works just well enough usually gets neglected until that shit doesn't work (again).

[โ€“] mindbleach 1 points 1 year ago

This approach is slicing a finite resource. It can only extend so far, and it sounds like they extended it about that far in one step. The amount of information the kernel keeps about each core has to be drastically reduced, for the next order of magnitude, or else cache hardware and behavior will need to change in comically-parallel chips.