On Mon, 8 Oct 2007, Jaswinder Singh wrote: > On 10/8/07, Steven Rostedt <rostedt@xxxxxxxxxxx> 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 - To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
