INTEGRITY RT Operating System

👤 tarun basu • 📅 April 5, 2026 • 👁️ 17 views • 🔄 Updated April 10, 2026

os operatingsystem

## 🧩 1. Basic Information | Field | Description | | --- | --- | | OS Name | INTEGRITY® RTOS | | Developer | Green Hills Software | | First Released | 1997 | | Latest Version | INTEGRITY® Multivisor (secure virtualization), latest releases in 2024 | | License Type | Proprietary commercial | | Supported Platforms | ARM, PowerPC, x86, MIPS, RISC-V, and more | | Still Active? | ✅ Yes (widely used in avionics, automotive, medical, industrial, defense systems) | ## ⚙️ 2. Kernel & Architecture | | | | --- | --- | | Kernel Type | Real-time microkernel, designed for hard real-time determinism | | Architecture | Fully preemptive, memory-protected, partitioned kernel | | Based On | Built from scratch by Green Hills (not derived from Linux, UNIX, or POSIX) | | Mixed Criticality Support | Can isolate high-safety tasks from general software | | SMP Support | Supports Symmetric Multiprocessing (SMP) on multi-core processors | ## 🌟 3. Key Features **Hard real-time performance:** guaranteed scheduling deadlines even under high load **Memory partitioning:** each process in its own isolated address space, preventing faults from spreading **Secure multivisor:** runs guest OSes (like Linux or Android) alongside critical RTOS tasks safely Supports DO-178C Level A certification for avionics, ISO 26262 for automotive, IEC 62304 for medical Minimal trusted code base (TCB) for high assurance Multi-core scheduling with asymmetric or symmetric strategies Broad toolchain support with MULTI IDE, MISRA compliance checking, static analysis ## 📈 4. Version History & Important Milestones ✅ | Milestone / Version | Year | Description | | --- | --- | --- | | INTEGRITY RTOS launched | 1997 | Green Hills’ secure hard RTOS for embedded & safety-critical | | INTEGRITY-178B for avionics | 2001± | Certified DO-178B Level A, later DO-178C, widely used in military/aerospace | | INTEGRITY Multivisor | ~2010s | Hypervisor + RTOS combination to run Linux/Android alongside secure RT tasks | | Ongoing releases | 2020s± | Continues to evolve with new ARM64, RISC-V, AUTOSAR support | ## 🎯 5. Target Audience & Use Cases **Aerospace & Defense:** Avionics flight computers, drones, satellite systems **Automotive:** ADAS, autonomous driving controllers, instrument clusters (ASIL-D) **Medical devices:** Robotic surgery systems, infusion pumps, imaging devices **Industrial & Robotics:** PLCs, motion controllers, factory automation **Secure multi-OS gateways:** Where Linux runs non-critical UI while INTEGRITY handles critical control ## ✅ 6. Pros & Cons | Pros | Cons | | --- | --- | | Ultra-reliable, certified for highest safety levels | Proprietary, expensive licensing | | Memory partitioning prevents fault propagation | Complex to configure for general developers | | Extremely fast, deterministic performance | Fewer general-purpose community libraries than Linux | | Can run guest OSes like Linux safely isolated | Primarily for embedded & safety-critical, not general desktop | ## 🎨 7. UI Demo & Visuals MULTI IDE showing INTEGRITY tasks, trace debugging & memory partitions Real-time scheduling trace with timeline visualization Example automotive dashboard powered by INTEGRITY Diagram: ARM SoC running INTEGRITY RTOS alongside a Linux guest in Multivisor Configuration screens showing task priorities & partition memory limits ## 📦 8. Ecosystem & App Support Full Green Hills MULTI IDE + TimeMachine debugger for deep system analysis Supports C, C++, Ada, even some Java (via safety runtimes) Common communication stacks: TCP/IP, CAN, ARINC-653, I2C, SPI Secure partition running guest Linux/Android on side for infotainment or non-critical apps ## 🔐 9. Security & Updates Designed for security-critical environments: small attack surface, strict separation Certifications: Common Criteria EAL 6+, DO-178C Level A, ISO 26262 ASIL D Regular updates via Green Hills, often aligned with customer long-term maintenance contracts Features like stack overflow detection, secure boot, kernel lockdowns by default ## 🌍 10. Community, License & Development License: Proprietary, licensed per project or SoC family, often under long-term support contracts Global user base includes Boeing, Lockheed Martin, GM, Toyota, Siemens, GE Healthcare Supported by Green Hills direct engineers & certified safety consultants Active in safety-critical conferences (embedded world, avionics expos, ISO/AUTOSAR working groups)