Best Real-Time Operating Systems (RTOS) in Asia

VxWorks®, a leading real-time operating platform in the industry, provides all the performance, reliability, safety and security capabilities you need for the most critical infrastructure's embedded computing systems. VxWorks is a preemptive, deterministic RTOS that prioritizes real-time embedded applications. It has low latency and minimaljitter. VxWorks has many security features that address the evolving security threats connected devices face at every stage, from boot-up to operation to data transfer to powered off. VxWorks has been certified to IEC 61508, ISO 26262, and DO-178C safety standards. VxWorks is built on an extensible, future-proof architecture that allows you to quickly respond to changing market demands, customer needs, technological advancements, and preserves your investment.

Arm Mbed OS is an open-source operating system tailored for IoT applications, providing all the essential tools for creating IoT devices. This robust OS is equipped to support smart and connected products built on Arm Cortex-M architecture, offering features such as machine learning, secure connectivity stacks, an RTOS kernel, and drivers for various sensors and I/O devices. Specifically designed for the Internet of Things, Arm Mbed OS integrates capabilities in connectivity, machine learning, networking, and security, complemented by a wealth of software libraries, development boards, tutorials, and practical examples. It fosters collaboration across a vast ecosystem, supporting over 70 partners in silicon, modules, cloud services, and OEMs, thereby enhancing choices for developers. By leveraging the Mbed OS API, developers can maintain clean, portable, and straightforward application code while benefiting from advanced security, communication, and machine learning functionalities. This cohesive solution ultimately streamlines the development process, significantly lowering costs, minimizing time investment, and reducing associated risks. Furthermore, Mbed OS empowers innovation, enabling developers to rapidly prototype and deploy IoT solutions with confidence.

RT-Thread, short for Real Time-Thread, is an embedded real-time multi-threaded operating system. It has been designed to support multi-tasking, allowing multiple tasks to run simultaneously. Although a processor core can only run one task at a time, RT-Thread executes every task quickly and switches between them rapidly according to priority, creating the illusion of simultaneous task execution. RT-Thread is mainly written in the C programming language, making it easy to understand and port. It applies object-oriented programming methods to real-time system design, resulting in elegant, structured, modular, and highly customizable code. The system comes in a few varieties. The NANO version is a minimal kernel that requires only 3KB of flash and 1.2KB of RAM. For resource-rich IoT devices, RT-Thread can use an online software package management tool, together with system configuration tools, to achieve an intuitive and rapid modular design.

LynxOS has been utilized in countless embedded devices, demonstrating dependable performance for over three decades in various safety and security-sensitive markets. This operating system offers a proven method for running applications within a Unix-like environment, where a unified kernel manages all resources and application services, making it particularly effective for hardware designs that were developed before the advent of virtualization. We aim to ensure our customers purchase only what is necessary for their specific needs. While real-time operating systems (RTOS) can deliver significant advantages, they are not essential for every embedded system configuration. For a more extensive overview of our resources related to RTOS, we invite you to explore our Embedded Systems Learning Center, which provides valuable information to assist you in making informed software purchasing choices as you design or enhance your system and evaluate potential real-time platform vendors. Moreover, this center is a great resource to help you understand the trade-offs and benefits associated with various embedded system approaches.

The Keil RTX is a deterministic, royalty-free real-time operating system tailored for ARM and Cortex-M devices, enabling the development of applications that can handle multiple tasks concurrently, resulting in more organized and maintainable code. This RTOS comes with source code, allowing for greater flexibility in programming. While it is feasible to implement real-time applications without an RTOS by using a Super-loop to run one or more functions, doing so can lead to various challenges related to scheduling, maintenance, and timing, all of which are efficiently managed by the Keil RTX. For those interested in understanding the benefits of an RTOS compared to a Super-loop approach, a detailed comparison highlights the advantages of adopting an RTOS. Additionally, Keil RTX offers high-speed real-time operations with minimal interrupt latency and a compact footprint suitable for resource-limited systems. It supports an unlimited number of tasks, each capable of having up to 254 levels of priority, as well as an infinite number of mailboxes, semaphores, mutexes, and timers, making it an ideal choice for applications requiring multithreading and thread-safe functionality. Overall, the Keil RTX provides developers with a powerful toolset for creating efficient and robust real-time applications.

Since its inception in 1980, QNX has been the choice of thousands of enterprises seeking to implement real-time operating systems that deliver an optimal blend of performance, security, and reliability for their mission-critical operations. Central to QNX's innovation is the QNX Neutrino® Real-time Operating System (RTOS), which is a comprehensive solution that facilitates the development of next-generation products across various sectors where dependability is paramount, such as automotive, healthcare devices, robotics, transportation, and industrial embedded environments. Thanks to its microkernel architecture, QNX ensures that a failure in one component does not disrupt the operation of others or compromise the kernel, as the malfunctioning part can be simply halted and restarted without negatively impacting the overall system. The QNX Neutrino RTOS stands out by providing the determinism unique to real-time operating systems, employing methods like adaptive partitioning to ensure that essential processes receive the necessary processing cycles to perform their tasks promptly, all while sustaining the performance expectations of intricate embedded systems. This combination of features makes QNX Neutrino RTOS a preferred choice for developers looking to create robust and resilient applications. As technology continues to evolve, the adaptability of QNX's offerings ensures that they remain at the forefront of real-time operating system solutions.

Deos™, developed by DDC-I, is a safety-critical real-time operating system (RTOS) that has been rigorously verified according to DO-178C/ED-12C Design Assurance Level A (DAL A) standards specifically for avionics applications. This RTOS supports ARINC 653 APEX and rate monotonic scheduling (RMS), and it is designed to meet the FACE Safety Base Profile requirements. Since its initial verification by Transport Canada in 1998, it has been a trusted solution in the aviation industry, with its certification allowing it to operate in tens of thousands of aircraft. Over the past two decades, Deos has adapted and evolved to incorporate new processors and features, demonstrating its flexibility and resilience. It has also undergone successful audits by a range of global certification authorities, including the FAA, ENAC, JAA, EASA, and CAAC, as well as by designated engineering representatives from various airframe and avionics suppliers, ensuring its continued compliance with industry standards. Its proven track record and ongoing development make it a pivotal component in modern aviation safety systems.

Nucleus® RTOS empowers system developers to meet the intricate demands of modern embedded designs. By combining a robust kernel with essential tooling features, Nucleus is perfectly suited for applications that prioritize scalability, connectivity, security, power efficiency, and reliable deterministic performance. This real-time operating system is not only proven and dependable but also fully optimized for various applications. It has demonstrated success in demanding sectors that require stringent safety and security standards, including industrial systems, medical devices, airborne systems, and automotive applications. Nucleus features a stable deterministic kernel designed to occupy minimal memory, complemented by a lightweight process model that enhances memory partitioning. Additionally, it supports dynamic loading and unloading of processes, allowing for increased modularity in applications, thus providing developers with the flexibility needed for diverse project requirements. This adaptability ensures that Nucleus RTOS can effectively cater to the evolving landscape of embedded technology.

Azure RTOS serves as a comprehensive suite for embedded development, featuring a compact yet powerful operating system that delivers reliable and ultra-fast performance tailored for devices with limited resources. Its user-friendly design and proven market success are evident, with deployment figures exceeding 10 billion devices globally. This operating system is compatible with the leading 32-bit microcontrollers and embedded development platforms, allowing teams to leverage their existing expertise effectively. With Azure RTOS, developers can seamlessly integrate cloud and local network connectivity, create robust flash file systems, and craft sophisticated user interfaces. Additionally, the code adheres to rigorous industry safety and security standards, ensuring its reliability. Clean and straightforward code not only enhances usability and maintenance but also contributes to a reduced total cost of ownership. Furthermore, achieving most safety-related certifications necessitates the submission of the entire source code for the software, including components of the RTOS, which underscores the importance of transparency in development processes. Each of these features collectively enhances the overall effectiveness of the development lifecycle.

PikeOS is a separation kernel-based hypervisor that supports multiple partitions for many operating systems and applications. It allows you to create smart devices for the Internet-of-Things. PikeOS is the best choice for systems that require protection against Cyber-Security attack due to its separation kernel approach. It is widely used in millions of edge and IoT systems. However, it has also been deployed in critical communications infrastructures. PikeOS combines virtualization and real time with unique technologies that have never been seen before. It allows you to move multiple complex embedded circuit boards into one hardware. It is also able to handle new hardware concepts like Big-SoCs that have multiple heterogeneous cores. PikeOS can run on multiple architectures and support processors that have a memory management unit (MMU).