Developer | MIT | ||||
---|---|---|---|---|---|
Written in | C and assembly | ||||
OS family | Unix-like | ||||
Source model | Open source | ||||
Latest release |
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Available in | English | ||||
Platforms | multiprocessor Intel x86 and RISC-V | ||||
Kernel type | Monolithic | ||||
Default user interface | Command-line interface | ||||
License | MIT license | ||||
Official website | pdos |
xv6 is a modern reimplementation of Sixth Edition Unix in ANSI C for multiprocessor x86 and RISC-V systems. It was created for educational purposes in MIT's Operating System Engineering course in 2006. [1]
MIT's Operating System Engineering course formerly used the original V6 source code. xv6 was created as a modern replacement, because PDP-11 machines are not widely available and the original operating system was written in archaic pre-ANSI C. Unlike Linux or BSD, xv6 is simple enough to cover in a semester, yet still contains the important concepts and organization of Unix. [1]
One feature of the Makefile for xv6 is the option to produce a PDF of the entire source code listing in a readable format. The entire printout is only 99 pages, including cross references. [2] This is reminiscent of the original V6 source code, which was published in a similar form in Lions' Commentary on UNIX 6th Edition, with Source Code.
xv6 has been used in operating systems courses at many universities, including:
In electronics and computer science, a reduced instruction set computer (RISC) is a computer architecture designed to simplify the individual instructions given to the computer to accomplish tasks. Compared to the instructions given to a complex instruction set computer (CISC), a RISC computer might require more instructions in order to accomplish a task because the individual instructions are written in simpler code. The goal is to offset the need to process more instructions by increasing the speed of each instruction, in particular by implementing an instruction pipeline, which may be simpler to achieve given simpler instructions.
A Commentary on the Sixth Edition UNIX Operating System by John Lions is a highly influential 1976 publication containing analytical commentary on the source code of the 6th Edition Unix computer operating system "resident nucleus" software, plus copy formatted and indexed by Lions, of said source code obtained from the authors at AT&T Bell Labs.
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Xv6 is a teaching operating system developed in the summer of 2006
Zadatak studenta je da izmeni deo operativnog sistem xv6 tako da podrži raspoređivače čije je opis dat u ovom projektu.
RISC-V:
x86 (unmaintained):