The perenial "Nuclear Power Plant" example
The perenial "Nuclear Power Plant" example
Posted Oct 12, 2004 19:50 UTC (Tue) by jens.richter (subscriber, #20650)In reply to: The perenial "Nuclear Power Plant" example by sbergman27
Parent article: Approaches to realtime Linux
Modern digital I&C safety systems require a hard realtime OS, yes it's true!
The timer tick of a system I know is 1 ms.
The response time of the I&C safety system to start the shutdown of the reactor in case of emergency is typically in the range below 1s.
You need a realtime OS, but the timig requirements are less dramatic than we think.
Posted Oct 13, 2004 9:52 UTC (Wed)
by pwaechtler (guest, #5075)
[Link]
The event is not triggered by the timer - it's interrupt driven.
http://www.qnx.com/developers/docs/qnx_4.25_docs/qnx4/sys...
>Modern digital I&C safety systems require a hard realtime OS, yes it's true!The perenial "Nuclear Power Plant" example
>The timer tick of a system I know is 1 ms.
Speak about interrupt latency in the range of 3-10 us and
scheduling latency in the range of 5-100 us.