Direct Rendering Manager and System call

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Difference between Direct Rendering Manager and System call

Direct Rendering Manager vs. System call

In computing, the Direct Rendering Manager (DRM), a subsystem of the Linux kernel, interfaces with the GPUs of modern video cards. In computing, a system call is the programmatic way in which a computer program requests a service from the kernel of the operating system it is executed on.

Application programming interface

In computer programming, an application programming interface (API) is a set of subroutine definitions, protocols, and tools for building software.

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C (programming language)

C (as in the letter ''c'') is a general-purpose, imperative computer programming language, supporting structured programming, lexical variable scope and recursion, while a static type system prevents many unintended operations.

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Computing

Computing is any goal-oriented activity requiring, benefiting from, or creating computers.

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Context switch

In computing, a context switch is the process of storing the state of a process or of a thread, so that it can be restored and execution resumed from the same point later.

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Framebuffer

A framebuffer (frame buffer, or sometimes framestore) is a portion of RAM containing a bitmap that drives a video display.

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Interrupt

In system programming, an interrupt is a signal to the processor emitted by hardware or software indicating an event that needs immediate attention.

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Library (computing)

In computer science, a library is a collection of non-volatile resources used by computer programs, often for software development.

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Linux

Linux is a family of free and open-source software operating systems built around the Linux kernel.

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Linux kernel

The Linux kernel is an open-source monolithic Unix-like computer operating system kernel.

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Memory management

Memory management is a form of resource management applied to computer memory.

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Open (system call)

For most file systems, a program initializes access to a file in a file system using the open system call.

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Process (computing)

In computing, a process is an instance of a computer program that is being executed.

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Subroutine

In computer programming, a subroutine is a sequence of program instructions that performs a specific task, packaged as a unit.

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Unix

Unix (trademarked as UNIX) is a family of multitasking, multiuser computer operating systems that derive from the original AT&T Unix, development starting in the 1970s at the Bell Labs research center by Ken Thompson, Dennis Ritchie, and others.

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User space

A modern computer operating system usually segregates virtual memory into kernel space and user space.

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