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IncludeOS
IncludeOS is a minimal, open source, unikernel operating system for cloud services and IoT, developed by Alf Walla and Andreas Åkesson. IncludeOS allows users to run C++ applications in the cloud without any operating system. IncludeOS runs on virtual machines like Linux KVM, and VMWare ESXi/Fusion. IncludeOS applications boot in about 300 ms. On Solo5/uKVM from IBM Research, boot times as low as 10 milliseconds are possible. Architecture The minimalist architecture of IncludeOS means that it does not have any virtual memory space. In turn, therefore, there is no concept of either system calls or user space A modern computer operating system usually uses virtual memory to provide separate address spaces or regions of a single address space, called user space and kernel space. This separation primarily provides memory protection and hardware prote .... References {{reflist , refs= {{cite web , author= Stig Øyvann , date= November 12, 2018 , df= ymd , url= https:// ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Unikernel
A unikernel is a type of computer program that is static linking, statically linked with the operating system code on which it depends. Unikernels are built with a specialized compiler that identifies the operating system services that a program uses and links it with one or more Operating_system#Library, library operating systems that provide them. Such a program requires no separate operating system and can run instead as the guest of a hypervisor. The unikernel architecture builds on concepts developed by Exokernel and Nemesis (operating system), Nemesis in the late 1990s. Design In a library operating system, protection boundaries are pushed to the lowest hardware layers, resulting in: # a set of libraries that implement mechanisms such as those needed to drive hardware or talk network protocols; # a set of policies that enforce access control and isolation in the application layer. The library OS architecture has several advantages and disadvantages compared with convent ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Aksjeselskap
is the Norwegian term for a stock-based company. It is usually abbreviated AS, historically often written as A/S. An AS is always a limited company, i.e. the owners cannot be held liable for any debt beyond the stock capital. Public companies are called (ASA), while companies without limited liability are called (ANS). All AS companies must have a stock capital of at least NOK 30,000. In addition, they must have a board of directors, depending on the size of turnover, balance sheet total or number of employees, an auditor. They may appoint a managing director (MD) or chief executive (CEO). If the company has assets exceeding NOK 3 million, the board must have at least three members and cannot be chaired by the MD/CEO. Practically all Norwegian companies have a fiscal year from January to December, but some foreign subsidiaries may have a different fiscal year, as is allowed, to match the parent corporation. The ASA differentiates from the in that it has rules regu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Virtual Memory
In computing, virtual memory, or virtual storage, is a memory management technique that provides an "idealized abstraction of the storage resources that are actually available on a given machine" which "creates the illusion to users of a very large (main) memory". The computer's operating system, using a combination of hardware and software, maps memory addresses used by a program, called '' virtual addresses'', into ''physical addresses'' in computer memory. Main storage, as seen by a process or task, appears as a contiguous address space or collection of contiguous segments. The operating system manages virtual address spaces and the assignment of real memory to virtual memory. Address translation hardware in the CPU, often referred to as a memory management unit (MMU), automatically translates virtual addresses to physical addresses. Software within the operating system may extend these capabilities, utilizing, e.g., disk storage, to provide a virtual address space ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Free Software Programmed In C++
Free may refer to: Concept * Freedom, the ability to act or change without constraint or restriction * Emancipate, attaining civil and political rights or equality * Free (''gratis''), free of charge * Gratis versus libre, the difference between the two common meanings of the adjective "free". Computing * Free (programming), a function that releases dynamically allocated memory for reuse * Free software, software usable and distributable with few restrictions and no payment *, an emoji in the Enclosed Alphanumeric Supplement block. Mathematics * Free object ** Free abelian group ** Free algebra ** Free group ** Free module ** Free semigroup * Free variable People * Free (surname) * Free (rapper) (born 1968), or Free Marie, American rapper and media personality * Free, a pseudonym for the activist and writer Abbie Hoffman * Free (active 2003–), American musician in the band FreeSol Arts and media Film and television * ''Free'' (film), a 2001 American dramedy * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Software Companies Of Norway
Software consists of computer programs that instruct the execution of a computer. Software also includes design documents and specifications. The history of software is closely tied to the development of digital computers in the mid-20th century. Early programs were written in the machine language specific to the hardware. The introduction of high-level programming languages in 1958 allowed for more human-readable instructions, making software development easier and more portable across different computer architectures. Software in a programming language is run through a compiler or interpreter to execute on the architecture's hardware. Over time, software has become complex, owing to developments in networking, operating systems, and databases. Software can generally be categorized into two main types: # operating systems, which manage hardware resources and provide services for applications # application software, which performs specific tasks for users The rise of cloud ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Free Software Operating Systems
Free may refer to: Concept * Freedom, the ability to act or change without constraint or restriction * Emancipate, attaining civil and political rights or equality * Free (''gratis''), free of charge * Gratis versus libre, the difference between the two common meanings of the adjective "free". Computing * Free (programming), a function that releases dynamically allocated memory for reuse * Free software, software usable and distributable with few restrictions and no payment *, an emoji in the Enclosed Alphanumeric Supplement block. Mathematics * Free object ** Free abelian group ** Free algebra ** Free group ** Free module ** Free semigroup * Free variable People * Free (surname) * Free (rapper) (born 1968), or Free Marie, American rapper and media personality * Free, a pseudonym for the activist and writer Abbie Hoffman * Free (active 2003–), American musician in the band FreeSol Arts and media Film and television * ''Free'' (film), a 2001 American dra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Computing Platforms
A computing platform, digital platform, or software platform is the infrastructure on which software is executed. While the individual components of a computing platform may be obfuscated under layers of abstraction, the ''summation of the required components comprise the computing platform''. Sometimes, the most relevant layer for a specific software is called a computing platform in itself to facilitate the communication, referring to the whole using only one of its attributes – i.e. using a metonymy. For example, in a single computer system, this would be the computer's architecture, operating system (OS), and runtime libraries. In the case of an application program or a computer video game, the most relevant layer is the operating system, so it can be called a platform itself (hence the term cross-platform for software that can be executed on multiple OSes, in this context). In a multi-computer system, such as in the case of offloading processing, it would encompass bo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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User Space
A modern computer operating system usually uses virtual memory to provide separate address spaces or regions of a single address space, called user space and kernel space. This separation primarily provides memory protection and hardware protection from malicious or errant software behaviour. Kernel space is strictly reserved for running a privileged operating system kernel, kernel extensions, and most device drivers. In contrast, user space is the memory area where application software and some drivers execute, typically with one address space per process. Overview The term user space (or userland) refers to all code that runs outside the operating system's kernel. User space usually refers to the various programs and libraries that the operating system uses to interact with the kernel: software that performs input/output, manipulates file system objects, application software, etc. Each user space process usually runs in its own virtual memory space, and, unless explici ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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System Calls
In computing, a system call (syscall) is the programmatic way in which a computer program requests a service from the operating system on which it is executed. This may include hardware-related services (for example, accessing a hard disk drive or accessing the device's camera), creation and execution of new processes, and communication with integral kernel services such as process scheduling. System calls provide an essential interface between a process and the operating system. In most systems, system calls can only be made from userspace processes, while in some systems, OS/360 and successors for example, privileged system code also issues system calls. For embedded systems, system calls typically do not change the privilege mode of the CPU. Privileges The architecture of most modern processors, with the exception of some embedded systems, involves a security model. For example, the '' rings'' model specifies multiple privilege levels under which software may be ex ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |