On 10/28/2020 10:41 AM, Nathan Hartman wrote:
On Tue, Oct 27, 2020 at 10:21 AM Alan Carvalho de Assis <acas...@gmail.com>
wrote:
Hi Nathan,
I totally agree! Zero Jitter Interrupt is a better name.
We don't have zero latency, we have zero jitter.
BR,
Alan
The latency is pretty close to zero too, because it interrupts whatever
else is happening.
Some RTOSes call it Raw Interrupts or Unmanaged Interrupts. It doesn't
really matter what you call it as long as the concept is understood.
Cheers
Nathan
There is still latency, but the latency is due to hardware only: The
software introduces zero ADDITIONAL latency.
There is still some jitter way down in the nanosecond level. Jitter in
hardware interrupt response is naturally since interrupts are processed
only at instruction boundaries. This quantization introduces a small
hardware jitter. The software introduces zero ADDITIONAL jitter.
Unmanaged interrupts is the name used by the Nucleus OS and is a pretty
good name. Zero latency and zero jitter are okay names if you remember
the refer only to timing errors introduced by software.
