Real-Time, Real Solutions. Home of TimeSys Linux/RT. Also Rate-Monotonic Analysis (RMA) based timing analysis and simulation. End-to-end real-time solutions. http://www.timesys.com/
Makes dual kernel RTLinux and RTCore/BSD, and OpenRTLinux RTOSs, realtime networking, protected memory, XML/RPC controls, embedded Linux developer kit; has RT developer tutorials and white papers; second tier support for Linux product vendors; software de http://www.fsmlabs.com/
Hard realtime OS, runs Linux as its lowest priority execution thread, on Alpha, some MIPS, PPC, x86. News, downloads, applications, documents, mail list, projects. http://www.rtlinux.org/
Commercial home of this hard realtime OS, runs Linux as its lowest priority execution thread; for Alpha, some MIPS, PPC, x86; limited only by hardware. Contract work, custom development, board ports. http://www.rtlinux.com/
RTLinux doesn't try to change Linux into an RTOS, it instead provides a new RT kernel incorporating Linux as a low-priority thread, so the RTOS stays small, streamlined and keeps Linux as a base for common applications. [EE Times] http://www.eetimes.com/story/OEG20000705S0044
When dealing with realtime systems, IPC overhead becomes important; examines two of the best IPC mechanisms available for Linux: FIFO, shared memory. [Dr. Dobb's Journal] http://www.ddj.com/documents/s=897/ddj9911b/9911b.htm