Eh, what’s a thread really? It’s a term for us humans. The difference between tw... | Hacker News

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		sroussey 9 days ago \| parent \| context \| favorite \| on: %CPU utilization is a lie Eh, what’s a thread really? It’s a term for us humans. The difference between two threads and one core or two cores with shared resources? Nothing is really all that neat and clean. It more of a 2 level NUMA type architecture with 2 sets of 6 SMP sets of 2. The scheduler may look at it that way (depending), but to the end user? Or even to most of the system? Nah.

tgma 9 days ago [–]

There are observable differences. For example, under HT, TLB flush or context switch will likely be observable by a neighboring thread whereas for in a full dedicated core, you won't observe such things.

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