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That diagram should be read as: The Page Directory (PD) is an array of Page Directory Entries (PDEs), pointed to by Control Register 3 (CR3). The leftmost 10 bits of the address are used as an index into the PD. The PDE at that position points to one of many Page Tables (PTs), specifically the PT that maps pages for the desired address. The next 10 bits ...


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N page tables. If you look at the Wikipedia entry for Page Tables, you'll see two diagrams there; one for the two-level page table structure, and one for the three-level page table structure. The purpose of the three-level page table structure is to implement PAE, which allows memory access beyond 4GB.


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When it comes to understanding parallel processing (I'm going to use this term as a generic term), it's best to start out with the basics. Take it slow and simple at first. It's my understanding that threads and processes are much the same, but threads are a light-weight work system whereas processes are heavy-weight. These are the terms used to indicate ...


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Please be careful to understand that priority is not the same as order of running. As a rule, when you fork a process it runs at the same priority, unless you ask for it to be lower. The order in which parent and child run is separate. The answer is that you cannot and should not depend on the order. In many cases after forking (or using any comparable ...



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