Why mmu required

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Techopedia Terms. Connect with us. Sign up. Term of the Day. Yes — not necessarily as a separate component, but they do have the necessary support in the emulation.

Both newer high-end Intel and AMD CPUs have support for nested page tables, which allow the emulator to express this nesting within the MMU itself, instead of having to expensively emulate it. Most hypervisors still include some level of software emulation though so that they will work without the extra hardware support. JenniferAnderson: Yes, this functionality was specifically introduced for para-virtualization.

Note that it is nothing new, hardware-assisted para-virtualization has existed in the mainframe world since the early s. It turns out however, that it can also be used for other interesting applications, such as speeding up Garbage Collection see the C4 collector in Azul's Zing JVM for an example. Show 8 more comments. MSalters MSalters 5 5 silver badges 10 10 bronze badges.

Toby Speight Toby Speight 7, 1 1 gold badge 18 18 silver badges 44 44 bronze badges. Each process has its own view of the address space - I'll edit to clarify the definition I'm using. So it seems that not only are MMUs not necessary, but systems are better off without them. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. Does ES6 make JavaScript frameworks obsolete?

Colin Walls has over thirty years experience in the electronics industry, largelydedicated to embedded software. A frequent presenter at conferences andseminars and author of numerous technical articles and two books onembedded software, Colin is an embedded software technologist with the Mentor Graphics Embedded Software Division], and is based in the UK.

His regular blog is located at: blogs. He may be reached by email at. Any use case of MMU in bare Metal. The use of the MMU is most likely to be quite transparent to the application developer. Once the OS is configured, there is little else to do. In theory, an MMU can. Most more recent systems with address translation use paging. Paul: You are right — I am a little sloppy about my terminology. You must Sign in or Register to post a comment. This site uses Akismet to reduce spam.

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