> What I miss from IRIX, that no other system has yet replicated: 1) Realtime mode. RTLinux doesn't count. FWIW, SGI didn't seem to agree. From SGI's own whit

> What I miss from IRIX, that no other system has yet replicated: 1) Realtime mode. RTLinux doesn't count. FWIW, SGI didn't seem to agree. From SGI's own whitepaper: "In addition, REACT for Linux adds unique capabilities including sgi-shield and kbar that were not available on IRIX. The Linux based platform delivers better real-time performance than SGI Origin running IRIX with realtime extensions: 30µs guaranteed interrupt response time versus 50µs for Origin." https://static.aminer.org/pdf/PDF/000/565/463/operating_system_extensions_for_dynamic_real_time_application.pdf https://static.aminer.org/pdf/PDF/000/565/463/operating_syst... Without REACT extensions, Irix realtime facilities aren't any different than the scheduling policies of Linux (this is akin to bypassing the normal scheduler). https://nixdoc.net/man-pages/IRIX/man5/realtime.5.html https://nixdoc.net/man-pages/IRIX/man5/realtime.5.html. I have a soft spot for Irix from the early 90s, and it had some clever accomodations for the technology at the time, but things have moved on and advanced.