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[6]: HARD real time? I don't think so
by tomcat on Sat 19th Apr 2008 23:10
in reply to "RE[5]: HARD real time? I don't think so"
Member since:2006-01-06
The definition of hard real time is, in fact, so pedantic, that I think I can say with reasonable certainty, that nobody, except maybe God, legitimately needs it. In short, I think there's a Universal market of maybe 1 real time computer. And you can quote me on that. ;-)
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
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
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Member since:
2005-07-24
You contradict yourself, here. If hard real time means guaranteed deadlines (and it does) what do "microseconds" have to do with it? The guarantee could be that it will definitely do something within one millisecond, or one year, but if it can be even one Planck Time over that, it fails the test. The definition of hard real time is, in fact, so pedantic, that I think I can say with reasonable certainty, that nobody, except maybe God, legitimately needs it.
In short, I think there's a Universal market of maybe 1 real time computer. And you can quote me on that. ;-)
Edited 2008-04-19 19:52 UTC