Messages in this thread | | | Subject | Re: [CPUISOL] CPU isolation extensions | From | Daniel Walker <> | Date | Mon, 28 Jan 2008 17:33:32 -0800 |
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On Mon, 2008-01-28 at 16:12 -0800, Max Krasnyanskiy wrote:
> Not accurate enough and way too much overhead for what I need. I know at this point it probably > sounds like I'm talking BS :). I wish I've released the engine and examples by now. Anyway let > me just say that SW MAC has crazy tight deadlines with lots of small tasks. Using nanosleep() & > gettimeofday() is simply not practical. So it's all TSC based with clever time sync logic between > HW and SW.
I don't know if it's BS or not, you clearly fixed your own problem which is good .. Although when you say "RT patches cannot achieve what I needed. Even RTAI/Xenomai can't do that." , and HRT is "Not accurate enough and way too much overhead" .. Given the hardware your using, that's all difficult to believe.. You also said this code has been running on production systems for two year, which means it's at least two years old .. There's been some good sized leaps in real time linux in the past two years ..
Daniel
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