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by OldHand2018 1697 days ago
The first link in the linked article mentions Linus saying (in 2019) that performance needs to be better than simply running with SMT disabled.

There is no mention of performance though. How is it? Presumably it is better!! And if so, this sounds like a concept that the OpenBSD community would be interested in since they prefer SMT disabled for security reasons.
1 comments
Arcuru 1697 days ago
Yea, I'm curious what they even mean by 'performance' in this context.

It would obviously impact whole-system performance, since this setting would intentionally limit what can run on each core leading to some idle cycles. That's expected though, and is merely a consequence of using this feature for security.

I'm curious if it measurably slows down the scheduler and impacts performance from there.

link