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Re:Intel Discloses Lakefield CPUs Specifications by wtallis on Wednesday June 10, 2020 @03:31PM (#23481074)
A trap, followed by migrating the process to a different core, which may have been powered off and definitely has cold caches. Context switches don't get any worse than that.
Re:Intel Discloses Lakefield CPUs Specifications by monocasa on Wednesday June 10, 2020 @05:50PM (#23482555)
If the core has been powered off, then that shows how rare it is.
Re:Intel Discloses Lakefield CPUs Specifications by mlyle on Wednesday June 10, 2020 @05:38PM (#23482461)
Yes, so you pay one really bad context switch penalty per process.