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Real-time Linux : GNU GPLv2: open source: general purpose: x86, x86_64, RISC-V, ARM64 and LoongArch (ARM and POWER in the -rt branch) [1] 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 OS: Proprietary: closed, available with license ...
Since February 2023, Canonical has been releasing real-time versions of Ubuntu Pro, free for personal and small-scale commercial use in up to 5 machines. [7] [8] The real-time kernel can be added to various existing Ubuntu releases through an enablement process. [8] These kernels include the PREEMPT_RT patchset and offer long-term support. [8]
Linux distributions that have highly modified kernels — for example, real-time computing kernels — should be listed separately. There are also a wide variety of minor BSD operating systems, many of which can be found at comparison of BSD operating systems .
A "hard" real-time operating system (hard RTOS) has less jitter than a "soft" real-time operating system (soft RTOS); a late answer is a wrong answer in a hard RTOS while a late answer is acceptable in a soft RTOS. The chief design goal is not high throughput, but rather a guarantee of a soft or hard performance category.
For software to be considered cross-platform, it must function on more than one computer architecture or OS. Developing such software can be a time-consuming task because different OSs have different application programming interfaces (API). Software written for one OS may not automatically work on all architectures that OS supports.
Soft real-time systems are typically used to solve issues of concurrent access and the need to keep a number of connected systems up-to-date through changing situations. Some examples of soft real-time systems: Software that maintains and updates the flight plans for commercial airliners. The flight plans must be kept reasonably current, but ...
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WSL beta was introduced in Windows 10 version 1607 (Anniversary Update) on August 2, 2016. Only Ubuntu (with Bash as the default shell) was supported. WSL beta was also called "Bash on Ubuntu on Windows" or "Bash on Windows". WSL was no longer beta in Windows 10 version 1709 (Fall Creators Update), released on October 17, 2017.