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Home » Computers » Software » Operating_Systems » Submicrokernel Submicrokernel
This category is for submicrokernel operating systems: OSs with non-monolithic architectures based on structures smaller than microkernels. Varieties and synonyms: lightweight kernel, nanokernel, picokernel, femtokernel, exokernel, no-kernel, or closely related topics. Most, maybe all object-oriented OS architectures also qualify as submicrokernels.Traditional OS architectures limit application performance, flexibility, functionality by fixing interfaces and implementations of OS abstractions such as interprocess communication and virtual memory. Submicrokernels address these issues in varied ways. Most are runtime extensible. Exokernels address such issues by application-level management of physical resources: they put applications in control, to run 10x or more faster than normal OSs.On this page, OSs are arranged in three groups and levels: 1) Top group: types or classes of OS. 2) Middle group: OSs for which there are more than one instance of an OS of this name/type, an OS family. 3) Bottom group: specific OSs, individual instances; there is only one OS of this name/type.
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| MIT Exokernel OS - Puts applications in control, runs 10x or more faster. Exopc and XOK versions run on x86 PCs. ExOS library gives user-level extensible implementation of Unix OS, so most applications compile and run with no change. Download. [Open Source, MIT]
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| | Exokernel: An Operating System Architecture for Application-Level Resource Management - Summary of paper mentioning overview and design issues.
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| | Exokernel: An Operating System Architecture for Application-Level Resource Management - Traditional OSs limit application performance, flexibility, functionality by fixing interfaces and implementations of OS abstractions such as interprocess communication and virtual memory. Exokernel address this via application-level management of physical resources. [ResearchIndex]
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| | miray Software - Makes µnOS: 72k microkernel on 8k nanokernel client/server architecture based on OOP framework, symmetric multithreading, multitasking, priority based scheduling, fully interruptible, separated address spaces, and full memory protection. Free download.
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| | Unununium Operating Engine - Claimed as radical new approach to OSs: no-kernel, self-modifying cells (like objects); single address space, useful where memory and CPU power is low, and maybe for AI. Written in self-modifying, modular assembly language. [Open Source, BSD]
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| | Miranda - Planed features: Exokernel architecture, object-oriented, POSIX compliant, intuitive GUI, and best technologies: journaled main filesystems, LibOS modular library. Development documentation. [Open Source, LGPL]
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| | Miranda: SourceForge - Downloads, announcements, and a forum. Programming languages: Assembly, C, and C++.
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| | dr'ex - Kernel with architecture like exokernel but varies from such where simplicity can be had, coded in C/Assembly. Early development. [Open Source, GPL]
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| | dr'ex: SourceForge - Information, news, forum, CVS, downloads. [Open Source, GPL]
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| | Elysium - Main idea: enforce no abstractions, rather, have them as options, to all levels of system: hardware, kernel and file services, ways users interact with system; based on exo principles. Descriptions, news. [Open Source]
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| | TUNES Project: No-Kernel - Unique description of operating systems without kernels, links.
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