On Mon, 8 Oct 2007, Jaswinder Singh wrote:
> On 10/8/07, Steven Rostedt <[email protected]> wrote:
> >
> > Not sure what you mean by this, since interrupt handlers are run as
> > threads and are fully preemptible.
> >
> I think by nested or reentrant interrupt handling technique you can
> further reduce latencies.
> what you think.
Interrupt handlers in vanilla Linux and preempt-rt are never reentrant.
There is no advantage of allowing interrupt handler reentrancy, quite the
contrary it makes the code more complex.
The interrupt handlers in preempt-rt are running in threads. One thread
per interrupt, so depending on the thread priority the handlers a handler
of one interrupt can preempt the running handler of another interrupt.
> Can we can get guaranteed realtime throughput by using these realtime patch.
Realtime is not about throughput. It's about determinism.
tglx
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