P208: Variables that exist at the beginning and executable code are loaded into the heap.
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- May 2023
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Local file Local file
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Virtual addresses are grouped into blocks called pages, which are typically4 KB in size. This practice avoids the need to store a translation mapping for everysingle variable in every program.
Group addresses into pages to speed up translation
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The CPU maintains a cache of recently translated addresses. It has its own (fast)memory to speed up accessing memory.
Known as TLB
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For every running program, every virtual address is mapped to a physical address.Those instructions are stored at a predefined address in memory as well. That means,in the worst case, every attempt at accessing memory addresses incurs two memorylookups.
Virtual address -> MMU looks up the mapping in somewhere predefined -> Physical address
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