> It's a DELL PC at 450 MHz. That much speed should help.
Processor speed helps little. It's motherboard design that's the problem.
> I ran the same test on exactly the same hardware (dual boot) running LynxOS.
> With LynxOS the time between IT Handler and RT_Task (that is a kernel thread
> for LynxOS) is in the range 10-15 usecs. [20-25 for RTL].
>
> My question is then, is there any possible optimization in the rt_sched
> to get a better response time ?
It's most likely the unecessary timer overhead in the scheduler -- uncessary
for your example.
Try putting rt_set_periodic_mode (LATCH) into your example init code.
You are using 9J right?
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