This is a list of real-time operating systems (RTOSs). This is an operating system in which the time taken to process an input stimulus is less than the time lapsed until the next input stimulus of the same type.


NameLicenseSource modelTarget usesStatusPlatforms
Apache MynewtApache 2.0open source embedded activeARM Cortex-M, MIPS32, Microchip PIC32, RISC-V
BeRTOSModified GNU GPLopen source embeddedarchivedARM, Cortex-M3, ARM ARM7TDMI, Atmel AVR, PowerPC (emu), x86 (emu), x86-64 (emu)
CapROSGNU GPL open source embedded activeIA-32, ARM9
ChibiOS/RTDual, GNU GPL or proprietaryopen sourceembedded, small footprint activex86, ARM7, ARM9, Cortex-M0-M3-M4, PowerPC e200z, STM8, STM32, AVR, MSP430, ColdFire, H8S
ChorusOS???defunctSPARC, x86, PowerPC
Concurrent CP/M,
became MP/M		Proprietaryclosed (meanwhile: open source)general purpose, industrialhistoric8080, Z80, 8086
Concurrent DOS,
became Multiuser DOS		Proprietarycloseddefunct8086, 286, 386, 68000, (also 8080/Z80 in dual-processor variants)
ContikiBSDopen sourceembedded, WSNactiveMSP430, AVR, ARM
Data General RDOSProprietary?general purposedefunctData General Nova, Data General Eclipse
DeosProprietaryclosedsafety criticalactivex86, PowerPC, MIPS
DioneOSProprietaryavailable for licenseeembeddedMSP430, MSP430x
DMERT
(Duplex Multi-Environment Real-Time)		Proprietary(Bell Labs)closedOS for long-distance telephone switching systemsinactiveBell Labs 3B20D
(a proprietary, VAX-like system with redundant [duplex] processors)
DNIXProprietaryclosedgeneral purposedefunct68000
GEC DOSProprietaryclosedprocess controldefunctGEC 4000 series
DSOSProprietaryclosed?defunctTI-980A minicomputer
DSP/BIOSProprietaryclosed, available with licensegeneral purposemaintenance onlyMostly Texas Instruments C2800, C5500, C6000 and OMAP DSP cores. Replaced by TI-RTOS, but available for download.
DSPnano RTOSProprietaryopen sourceMCU, DSC, DSP SoCactiveR8C, M16C, PIC24, dsPIC33
eCosModified GNU GPLopen source embeddedinactiveARM-XScale-Cortex-M, CalmRISC, 680x0-ColdFire, fr30, FR-V, H8, IA-32, MIPS, MN10300, OpenRISC, PowerPC, SPARC, SuperH, V8xx
eCosProModified GNU GPL or eCosPro licenseopen source with non-free portionsactiveARM7-9, Cortex-A5-A9-M3-M4-M7, 680x0-ColdFire, H8-H8S, IA-32, MIPS32, MIPS64, microMIPS, NIOS II, OpenRISC, PowerPC, SPARC, SH4/4A, TILE-Gx, XScale
embOSProprietaryclosed, available to customers, free object code for non-commercial useembedded, industrial, IoT, safety criticalactiveARM7/9/11, ARM Cortex-A/R/M, AVR, AVR32, C16x, CR16C, ColdFire, H8, HCS12, M16C, M32C, MSP430, NIOS2, PIC18/24/32, R32C, R8C, RISC-V, RL78, RH850, RX100/200/600/700, RZ, SH2A, STM8, ST7, V850, 78K0, 8051
ERIKA EnterpriseGPL and GPL linking exception open source embeddedARM7, ARM Cortex-M, ARM Cortex-A (on Jailhouse hypervisor), Hitachi H8, Altera Nios2, Microchip dsPIC (including dsPIC30, dsPIC33, and PIC24), Microchip PIC32, ST Microelectronics ST10, Infineon C167, Infineon Tricore, Freescale PPC e200 (MPC 56xx) (including PPC e200 z0, z6, z7), Freescale S12XS, EnSilica eSi-RISC, AVR, Lattice Mico32, MSP430, Renesas RX200, x86-64 (on Jailhouse hypervisor)
EROSModified GNU GPLopen sourceexperimental
research use		dormantIA-32
FlexOSProprietaryclosedgeneral purpose, industrial, POSdefunct186, 286, 386, V60, V70, 68000
FreeRTOSMIT open source embedded activeARM, AVR, AVR32, ColdFire, ESP32, HCS12, IA-32, Cortex-M3-M4-M7, Infineon XMC4000, MicroBlaze, MSP430, PIC, PIC32, Renesas H8/S, RISC-V, RX100-200-600-700, 8052, STM32, TriCore, EFM32
FuchsiaVariesembeddedAArch64, x86-64
Keil RTXApache 2.0open sourceembeddedArm Cortex-M
FunkOSModified Sleepycat Licenseopen sourceembeddedAVR, MSP430, Cortex-M3
HeartOSProprietaryclosedsafety criticalx86, PowerPC, ARM
Huawei LiteOSBSDopen sourceembeddeddiscontinuedARM (M0/3/4/7, A7/17/53, ARM9/11), x86, RISC-V
IBM 4680 OSProprietaryclosedgeneral purpose, industrial, POSdefunct286
IBM 4690 OSProprietaryactive286, 386
INTEGRITYProprietaryembeddedARM, XScale, Blackfin, ColdFire, MIPS, PowerPC, x86
INtimeProprietaryx86
ITRONT-LicensevariesembeddedARM, MIPS, x86, Renesas RX100-200-600-700-others
Kaspersky OSProprietaryopen sourcesafety critical, virtualizationx86, x86_64, ARMV5, ARMV7, ARMV8, MIPS32
KolibriOSGNU GPLembeddablex86
LynxOSProprietarysource availableembeddedMotorola 68010, x86/IA-32, ARM, Freescale PowerPC, PowerPC 970, LEON
Mbed OSApache 2.0open sourceembeddedArm Cortex-M
MenuetOSGNU GPLopen source?IA-32
MERTProprietary(Bell Labs)closedOS for long-distance telephone switching systemsinactivePDP-11
MicroC/OS-IIIApache 2.0open sourceembeddedactiveARM7-9-11/Cortex-M1-3-4-A8/9, AVR, HC11/12/S12, ColdFire, Blackfin, MicroBlaze, NIOS, 8051, x86, Win32, H8S, M16C, M32C, MIPS, 68000, PIC24/dsPIC33/PIC32, MSP430, PowerPC, SH, StarCore, Renesas RX100-200-600-700, RL; STM32, …
MontaVista LinuxGNU GPLopen sourceembedded?
MP/MProprietaryclosed (meanwhile: open source)general purpose, industrialdefunct8080, Z80, 8086
MQXProprietarycomplimentary source availableembeddedactiveFreescale Power, ColdFire, Kinetis Cortex ARM, List of Freescale products
Multiuser DOSProprietaryclosedgeneral-purpose, industrialdefunct386
Nano-RKDual, GPL or commercialopen sourceembedded, WSNdefunctAVR, MSP430
NeutrinoProprietarysome source providedmicrokernel, embedded, industrialactiveARM, ARM64, MIPS, PPC, SH, x86, x86-64, XScale
Nucleus RTOSProprietarysource provided embeddedARM (Cortex-M3-M4-R4-R4F-A8-A9, ARM7-9-11), PowerPC, MIPS32-16e, microMIPS, ColdFire, SuperH
NUTProprietary open sourceembedded, industrialARM-M0, ARM-M0+, ARM Cortex-M3, ARM9, ARM Cortex-M7, Cortex-M3
Nut/OSBSDembedded, industrialAVR, AVR32, ARM7, ARM9, Cortex-M3
NuttXApache 2.0open sourceembedded, small footprintLinux user mode, ARM7-9, Cortex-A5-A8-A9-M0-M3-M4-M7, 8052, Espressif ESP32, Lattice LM32, Renesas MC16C/26/SH-1, RISC-V, Zilog Z16F, Zilog eZ80 Acclaim!, Zilog Z8Encore!, Z80, MIPS PIC32MX, PIC32MZ
OpenComRTOSProprietarysource providedembeddedFreescale PowerPC, Texas Instruments C66xxx DSP, ARM, XMOS, MicroBlaze, LEON, NXP CoolFlux DSP, Melexis MLX16, Win32, Linux
OS2000Proprietary?embeddedactiveMIPS (Baget variant), KOMDIV-32, KOMDIV-64, Intel BSPs (x86)
OS4000Proprietaryclosedprocess controlmaintenance onlyGEC 4000 series
OSEProprietaryavailable to customersgeneral purpose activeARM, PowerPC, x86, TI OMAP, …
OS-9Proprietaryavailable to customersembeddedARM-strongARM, MIPS, PowerPC, SuperH, x86/Pentium, XSCALE, Motorola 6809, 680x0, SPARC
OSEKDual, GPL or commercialspecificationengine control units
Phoenix-RTOSBSDopen sourceembedded activeARMv7 Cortex-M, ARMv7 Cortex-A, IA-32, RISC V
PikeOSProprietaryavailable to customerscertifiable safety & security, embedded virtualisationPPC, x86, ARM, MIPS, SPARC-LEON, RISC-V
ProtothreadsBSDopen sourcegeneral purpose activeArchitecture independent
pSOSProprietary??discontinued680x0
PX5 RTOSProprietaryroyalty-free licensingembeddedactiveEmbedded MCU and MPU architectures. ARM's Cortex-M, Cortex-R, Cortex-A, RISC-V. AMP and SMP configurations.
QNXProprietary?microkernel, embedded, industrialactive
QPDual, GPL or commercialdualMCU, DSC, DSP SoCARM7/9, ARM Cortex-M3-M0, MSP430, TMS320C28x, AVR, AVRXmega, ColdFire, 68HC08, M16C/R8C, H8, 8051, 80251, PIC18, PIC24/dsPIC33, Nios II, PSoC1
REAL/32Proprietaryclosedgeneral-purpose, industrial386
Real-time Linux (CONFIG_RT_PREEMPT)GNU GPLv2open sourcegeneral purposesame as Linux
RedHawk Linux RTOS Proprietary closed hardware-in-the-loop, software-in-the-loop, general purpose active Intel, AMD, ARM, NVIDIA Drive, NVIDIA Jetson Orin
REX OSProprietaryclosed, available with licenseembeddedinactiveARM
RIOTGNU LGPLopen sourceactiveARM, MSP430, AVR, x86, RISC-V
RMXProprietarycloseddefunctIntel 8080, 8086, 80386, higher
RODOSBSDsource providedactiveARMv7 (M3, A8, A9), AVR32, PowerPC 405, SPARC64

Platforms: SmartFusion2, RaspberryPi, STM32 On an OS: Linux, Windows, macOS, FreeRTOS, RTEMS

RSX-11Proprietary??historicPDP-11
RT-11Proprietary?general purposedefunctPDP-11
RTAIGNU GPLopen sourcegeneral purposeactivex86 (with and without FPU and TSC), x86-64, PowerPC, ARM (StrongARM; ARM7: clps711x-family, Cirrus Logic EP7xxx, CS89712, PXA25x), m68k (supporting both MMU and NOMMU cpus)
RTEMSModified GNU GPLembeddedARM, Blackfin, ColdFire, TI C3x/C4x, H8/300, x86, 68k, Milkymist SoC, MIPS, Nios II, PowerPC, SuperH, SPARC, ERC32, LEON, Mongoose-V
RTLinuxGNU GPLgeneral purposeinactivesame as Linux
RT-KernelProprietarysource providedembeddedactiveARM, Blackfin
RT-ThreadApache 2.0open sourceembedded activeARM, ARM Cortex-M0-M3-R4-M4-M7, IA-32, AVR32, Blackfin, nios, PPC, M16C, MIPS (loongson-1b-1c, PIC32，xburst), MicroBlaze, V850, unicore32,
RTXC QuadrosProprietarysource availableembeddedARM - Atmel/Freescale/NXP/ST/TI, Blackfin, 680x0-ColdFire, PowerPC, StarCore, TI-Luminary Stellaris, TI OMAP, XScale
RTX, RTX64ProprietaryclosedMS Windows extensionx86, x86-64
RX116??embedded, industrialdefunctNEC V20, NEC V30, NEC V40, NEC V50
RX616??safety critical, embedded, industrialNEC V60, NEC V70
RX-UX832??embedded, industrial, general-purposeNEC V60, NEC V70
SafeRTOSProprietarysource code & Design Assurance Pack availableembedded, safety criticalactiveSame as FreeRTOS
SHaRKGNU GPL open source?inactive?
Simulink Real-TimeProprietaryclosedreal-time testing-embeddedactivex86
SINTRAN IIIProprietary???Norsk Data computers
Symbian OSEclipse open source embeddeddefunctARM
T-KernelT-Licensesource availableembedded RTOS activeARM, MIPS, SH, more
THEOSProprietary????
ThreadXProprietarypartial source available?activeARC, ARM/Thumb, AVR32, BlackFin, 680x0-ColdFire, H8-300H, Luminary Micro Stellaris, M-CORE, MicroBlaze, PIC24-dsPIC, PIC32, MIPS, V8xx, Nios II, PowerPC, Renesas RX100, RX200, RX600, RX700, Synergy, SH, SHARC, StarCore, STM32, StrongARM, TMS320C54x, TMS320C6x, x86/x386, XScale, Xtensa/Diamond, ZSP
TI-RTOS Kernel (SYS/BIOS)BSDopen source embeddedMostly Texas Instruments: MSP430-432, C2000-5000-6000, TI's ARM families (Cortex M3-4F-R4-A8-A15), SimpleLink Wireless CC2xxx-CC3xxx
TizenRTApache 2.0open sourceembeddedactive
Transaction Processing FacilityProprietarymixedgeneral purposeactiveIBM Z series
TRON projectFreemixedmixedactiveany: is a specification, not an implementation
UNIX-RTR???defunctPDP-11
UNOS???historic680x0
UniProtonFreeopen sourceembeddedactiveAArch64 (Kunpeng), x86-64 on openEuler community & ARM, RISC-V, x86, x64 and LoongArch on OpenHarmony
µITRONT-License open source embeddedactiveARM, MIPS, x86, Renesas RX100-200-600-700-others
µ-velOSityProprietary?microkernelactive?
velOSityProprietary??Power ISA, ARM/XScale, MIPS, x86/Pentium, ColdFire, Blackfin, OMAP, DaVinci
VAXELNProprietaryclosed source?historicVAX
VRTXProprietary??superseded by Nucleus RTOSARM, MIPS, PowerPC, RISC
VxWorksProprietary?embeddedactiveARM, IA-32, Intel 64, MIPS, PowerPC, SH-4, StrongARM, xScale
Windows CEProprietaryMicrosoft Shared Sourcex86, MIPS, ARM, SuperH
Windows 10 IoTProprietary?Intel Atom, Celeron, Pentium; Qualcomm Snapdragon, Broadcom, NXP i.MX
XenomaiGNU GPLv2open sourcegeneralx86, x86-64, PowerPC, ARM, Analog Devices Blackfin BF52x, BF53x, BF54x and BF56x
XINUFreeembeddedactivex86, MIPS, ARM, AVR
XMKBSDopen sourceembeddedinactive
ZephyrApache 2.0 open source embedded activeARM (Cortex-M0, -M3, -M4, -M23, -M33, -R4, -R5, -A53), x86, ARC, RISC-V, Nios II, Xtensa, SPARC

References

    This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.