Better test case timings: I changed from doing entire linear write testing to just touching the pages, to take memory bandwidth out of the equation. VirtualAlloc takes 0ms on 4k pages, 6ms on 2mb pages. Fault handling takes 60ms on 4k pages, 0ms on 2mb pages. So that's that.
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Thank you for finding some explanation at least, that really shouldn't be a constraint today
Thanks. Twitter will use this to make your timeline better. UndoUndo
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So what would you do if you had to page in a 2MB page when there isn't 2MB of contiguous physical memory?
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I understand that this is apparently a concern, but I'm not sure I understand why. On modern machines that all have 16+gb of memory, is there some reason the OS can't just sub-divide 4k pages from 2mb pages, and evict all 512 4k pages when deciding to swap in a 2mb page?
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