Mon, 30 Oct 2000 15:02:09 -0600
Pascal Obry writes:
> Stephen Leake writes:
> > > What I would like to know is if anyone has programming (recently)
> > > for real time and what the current performances and specifications
> > > are for the Real_Time package?
> > For any language:
> > On Unix, 1 second.
> > On Windows NT, 10 milliseconds.
> > On VxWorks PowerPC, 100 microseconds (I think).
> I'am not sure what these values mean here. If it is the Clock
> precision then under NT it depends. The GNAT implementation use a
> performance counter and has a precision less than 1E-6 seconds, so
> far better than 10 milliseconds :)
For what it's worth, so does Janus/Ada. But ObjectAda and Rational Apex Ada
uses the standard clock tick for Calendar.Clock. Which is 10 milliseconds on
Windows NT; but if you run the same program (even the same executable) on
Windows 95/98, it is about 55 milliseconds.
All of which makes the original point: this depends completely on the target
system *and* implementation. The (original) question cannot be meaningfully
answered without knowing both the target system and implementation.