After 20 years, Linux is Officially a Real-time Operating System

No more need to patch the Linux kernel to make it an RTOS.

After over two decades of development, debate, and refinement, real-time preemption support has officially arrived in the mainline Linux kernel in 6.12. This groundbreaking milestone elevates Linux to new levels of reliability and performance, particularly for time-critical applications in industrial automation, robotics, and test and measurement. At acontis technologies, we celebrate this achievement as it aligns perfectly with our commitment to delivering high-performance industrial software solutions.

What is Real-time Linux?

Unlike general-purpose operating systems such as Windows and macOS, which prioritize a broad range of tasks, a real-time operating system (RTOS) is specifically designed to react to events and process data within strict time constraints, often measured in milliseconds or even microseconds.

Real-time preemption, often referred to as PREEMPT_RT, transforms the Linux kernel into a system capable of deterministic, low-latency performance. Originally proposed in the early 2000s, the PREEMPT_RT patch has undergone rigorous testing and contributions from countless developers, organizations, and open-source enthusiasts.

The addition of these real-time capabilities to the mainline kernel resolves longstanding challenges in applications requiring precise timing and reaction to real-world inputs. With reduced latency and predictable execution times, Linux can compete with proprietary real-time operating systems while retaining its open-source flexibility.

Benefits of Real-time Linux

At acontis, we understand the importance of real-time performance in modern industrial applications. Our software solutions, including our EtherCAT software and our real-time Hypervisors, rely on predictable execution to maintain synchronization and reliability. The incorporation of real-time capabilities into the Linux kernel makes it easier for our customers to use our software solutions to achieve:

  • Deterministic Control: Real-time performance ensures that time-critical tasks execute on schedule, essential for industrial automation and robotics.
  • Improved Stability: With native mainline kernel support, there’s no need for additional patches or workarounds, reducing system complexity, improving reliability, and simplifying maintenance.

Why This Matters

Of course, many industries have been leveraging real-time Linux for years by customizing and patching the kernel, but now that the mainline kernel has incorporated this functionality, we can expect even greater adoption of Linux in time-critical applications across various sectors.

For businesses relying on Linux-based systems, real-time preemption support unlocks new opportunities for growth and innovation. Industries requiring precise timing—such as aerospace, automotive, manufacturing, and healthcare—can now confidently adopt Linux as an RTOS.

Real-time Linux represents a significant step forward for the open-source community and industrial users alike. At acontis, we’re committed to leveraging real-time Linux to enhance our industrial software solutions. Whether you're developing cutting-edge robotics or streamlining industrial automation, our expertise ensures you’ll harness the full potential of real-time capabilities.

Learn More

Ready to explore how real-time Linux can benefit your business? Contact us to learn more about how our solutions align with the latest Linux advancements to help you achieve your real-time communications needs. Let’s build the future of real-time systems together!