Linked by David Adams on Fri 18th Apr 2008 17:34 UTC, submitted by Rahul
Lennart Poettering of Red Hat, PulseAudio maintainer has blogged in detail about the impact of Real-Time Group scheduling in 2.6.25 kernel. The Real time patches come from -rt patchset maintained by Ingo Molnar of Red Hat which aims to make Linux the first general purpose operating system with hard real time features. 
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RE[7]: HARD real time? I don't think so
by sbergman27 on Sat 19th Apr 2008 23:29
in reply to "RE[6]: HARD real time? I don't think so"
Member since:2005-07-24
Try to remember that the next time you're riding on a plane and you're approaching for landing. Or, when you need to stop suddenly in your car. Or, when a nuke plant operator needs to regulate cooling. Because those are scenarios where it's needed.
Where what is needed? Please be *very* specific in your answer.
BTW, what are the actual real time requirements of the nuclear power plant cooling system? Why should it require microsecond precision?
Edited 2008-04-19 23:38 UTC
RE[8]: HARD real time? I don't think so
by tomcat on Mon 21st Apr 2008 04:09
in reply to "RE[7]: HARD real time? I don't think so"
Member since:2006-01-06
Where what is needed?
Response time. Would you really like a latency of even a second or two for an aircraft after the pilot initiates a given action? It could kill the plane.
BTW, what are the actual real time requirements of the nuclear power plant cooling system? Why should it require microsecond precision?
You should know this already. It may not necessarily be any one given action that requires microsecond precision; rather, it's often dependent events that require high precision synchronization (ie. emergency systems) where several things need to happen at once when a dangerous condition is detected (eg. dropping of control rods, pumps need to be activated, power needs to be reduced, etc). It's academic.
Member since:
2006-01-06
Try to remember that the next time you're riding on a plane and you're approaching for landing. Or, when you need to stop suddenly in your car. Or, when a nuke plant operator needs to regulate cooling. Because those are scenarios where it's needed.
Edited 2008-04-19 23:12 UTC