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TLB look
TLB Look A TLB (Translation Lookaside Buffer) is a small cache located in a memory space called the Translation Unit (TFU). It stores recently used page tab...
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TLB Look A TLB (Translation Lookaside Buffer) is a small cache located in a memory space called the Translation Unit (TFU). It stores recently used page tab...
TLB Look
A TLB (Translation Lookaside Buffer) is a small cache located in a memory space called the Translation Unit (TFU). It stores recently used page table entries (PTEs) that are being translated from virtual addresses to physical memory addresses.
TLB Look Operation:
When a page table entry needs to be translated, the TLB is consulted first.
If the entry is found in the TLB, it is used to generate the physical address.
If the entry is not found in the TLB, the page must be loaded from main memory.
The TLB is organized based on the page number, allowing it to store entries for recently used pages.
The TLB is typically smaller than the memory space available in the TFU, but it significantly reduces the time taken to translate pages.
Example:
Imagine a program that is trying to access memory addresses 0x1234 and 0x5678.
The virtual address of the first page is 0x1234.
The virtual address of the second page is 0x5678.
The TLB is consulted first.
The page with address 0x1234 is found in the TLB.
The physical address of the page is calculated using the TLB entry.
The physical address is 0x1234.
The page is loaded into memory and the translation is successful