Jan Kiszka wrote:
> There is a shadow relax procedure running before the timer IRQ fires,
> and that takes another context switch. So the latency sum is:
> - unrelated context switch
> - timer IRQ
> - switch to woken up RT process
> - serial IRQ
> Almost the theoretical worst case.
The problem is that it does not happen when launching latency with -t 1
or -t 2, or if latency is not run in the background.
Anyway, I will investigate on the double ack issue, because it could
mean that there is a double EOI, which, I guess could cause some
troubles at interrupt controller level.
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