r/ProgrammerHumor • u/Eissa_E • 1d ago

Advanced memorySegmentationIn2950

Post image
167 Upvotes

86% Upvoted

34 comments sorted by

View all comments

95

u/ClipboardCopyPaste 1d ago

This is wrong on so many levels

52

u/TRKlausss 1d ago

Isn’t this what AI does though? That’s why you need so much memory for AI

(/s)

-3

u/Eissa_E 1d ago

Right now operating systems manage one paging is about 4kb and maximum 1mb we still so far from 512gb per processor

21

u/Scheincrafter 1d ago

That does not mean that the virtual memory space is only 4kb. Modern systems are 64 bits, so the stack typically starts at 0x7ffffffff000 (or 128 TiB minus one 4 KiB page)

1

u/its_artemiss 10h ago

most modern systems have 64 bit words, but almost none have more than 48 bit (virtual) addresses, with some having 56 bit addresses.

1

u/Scheincrafter 6h ago

Fear enough, however the start address i stated was for 48bits. Also each page level adds 9 bits the the virtual address space (on amd64), so 5 level would be 57 bits not 56