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From: andrew <andrew.carroll@okstate.edu>
Newsgroups: comp.lang.ada
Subject: Re: Real Time IO routines
Date: Sat, 27 Oct 2007 13:12:22 -0700
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Date: 2007-10-27T13:12:22-07:00
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On Oct 27, 7:40 am, John McCormick <mccorm...@cs.uni.edu> wrote:
> On Oct 26, 4:14 pm, andrew <andrew.carr...@okstate.edu> wrote:
>
>
>
> > start := clock;
> > --I run my algorithm here
> > finish := clock;
> > ada.Text_IO.put_line("time = " & duration'image(to_duration(finish -
> > start)));
>
> > the output is always time = 0.000000000.  I know it had to take some
> > time because it takes about 10 seconds for the program to reach that
> > point in the code.  Overflow maybe?
>
> For years I used the identical logic in an exercise in plotting
> running times for various sorting algortihms in a unit on Big-O.  It
> worked fine for the old GNAT (Ada 95).  Last year when I recompiled it
> with GNAT GPL, I got the same results as you - all times gave zero.
> When I added a delay 10.0, it worked as Adam reported.  I meant to
> submit a bug report, but never got around to writing it up.  I haven't
> tried it with the latest GPL version.
>
> John

Ahhh haaa, that's it.  I put a delay 1.0 before I run my algorithm and
before I do start := clock and now it gives me a value.  ;-)

Dare I say something is not quite right?