> 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."
Without REACT extensions, Irix realtime facilities aren't any different than the scheduling policies of Linux (this is akin to bypassing the normal scheduler).
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.
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_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.
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.