This is not quite correct. RT tasks under rtlinux can access all Linux services
indirectly by passing their requests to Linux processes. For example it is quite
easy to have a linux process log data collected by a rt task and, in fact, this
is probably the most common use of RTLinux right now.
> A purely binary distinction between hard and soft real-time is clearly
> not acceptable for all applications. Many applications have
> requirements spanning a continuum between the two. ...
I think that this is confused. Many RT _applications_ include both RT and non RT
components. But hard RT means that the OS guarrantees irq and scheduling latencies to
tasks. This is binary.
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