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Real-time operating system

A real-time operating system (RTOS) is an operating system (OS) for real-time computing applications that processes data and events that have critically defined time constraints. An RTOS mainly targets resource constrained devices like microcontrollers. It is distinct from a time-sharing operating system, such as Unix, which manages the sharing of system…

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Scheduling

CPUCoreResource starvationDoubly linked listCooperative scheduling
13 related topics

Characteristics

TaskJitterThroughputDeterministicallyScheduling
7 related topics

Intertask communication and resource sharing

User modeKernel modeSystem callCritical sectionMutex
9 related topics

Design philosophies

Switches tasksInterruptRound-robinMultitaskingCPU designs
5 related topics

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Overview

Characteristics

Design philosophies

Scheduling

Intertask communication and resource sharing

Interrupt handlers and the scheduler

Memory allocation

Hardware abstraction

  • Zephyr Zephyr (operating system)

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Real-time operating system

Nodes58
Edges57
Triples27
Avg. degree1.97
Density0.034483
Components1

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Real-time operating system

Top relations

related to Interrupt handlers and the scheduler · 12
Real-time operating system → An OS, As, For, OS, OSes, RTOSs, Since, The, The OS, There, This, Updates
related to Memory allocation · 5
Real-time operating system → First, For, Memory, The, Whenever
see also · 3
Real-time operating system → Adaptive, DO-178BEarliest, RTOS

Important terminology Word statistics

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Important terminology

task tasks interrupt time systems operating interrupts priority rtos resource ready real-time os mutex system cpu scheduler memory critical allocation

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
priority inversioninstance ofThere are several well-known problems with mutex based designs0.80text
deadlocks.In priority inversion a high priority task waits because a low priority task has a mutexinstance ofThere are several well-known problems with mutex based designs0.80text
but the lower priority task is not given CPU time to finish its workinstance ofThere are several well-known problems with mutex based designs0.80text
threadsinstance ofA scheduler often provides the ability to unblock a task from interrupt handler context.An OS maintains catalogues of objects it manages0.80text
mutexesinstance ofA scheduler often provides the ability to unblock a task from interrupt handler context.An OS maintains catalogues of objects it manages0.80text
memoryinstance ofA scheduler often provides the ability to unblock a task from interrupt handler context.An OS maintains catalogues of objects it manages0.80text
and so oninstance ofA scheduler often provides the ability to unblock a task from interrupt handler context.An OS maintains catalogues of objects it manages0.80text
Real-time operating systemrelated to Interrupt handlers and the schedulerSince0.60section
Real-time operating systemrelated to Interrupt handlers and the schedulerThe0.60section
Real-time operating systemrelated to Interrupt handlers and the schedulerThis0.60section
Real-time operating systemrelated to Interrupt handlers and the schedulerAn OS0.60section
Real-time operating systemrelated to Interrupt handlers and the schedulerUpdates0.60section

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