This Week in Plasma: Shadows for Steam and Discord

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https://blogs.kde.org/2026/07/18/this-week-in-plasma-shadows-for-steam-and-discord/

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You can now assign processes to specific CPUs or groups of CPUs in System Monitor, known as setting CPU affinity. (Taras Oleksyn, KDE Bugzilla #429151)

Huh. I wonder when this is needed to set it after a process is started. Is there an actual use case for this? I understand what this does, but why would anyone change it? Is there a real world example someone could give me?

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Some generally older software has buggy multi threading implementation, and forcing its threads to execute “interleaved, but never simultaneously” often improves stability or even completely hides the issue.

Also I know some games used to have big performance issues if they had too many hardware threads available, but I don’t know why exactly

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There’s also modern CPU structure, where there might be a performance hit if you involve cores that are attached to a different cache or don’t have direct access to memory. Threadripper ran into that sort of thing.

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Some older games (example: GTA 4) have broken physics with modern CPUs due to core count.

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Emulation i would guess?

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Just what I was missing.

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