From: Stephen Leake <stephen.a.leake.1@gsfc.nasa.gov>
Subject: Re: redirecting the standard output
Date: 11 Apr 2001 08:04:07 -0400
Date: 2001-04-11T12:19:03+00:00 [thread overview]
Message-ID: <ud7ajiqx4.fsf@gsfc.nasa.gov> (raw)
In-Reply-To: 3ad40649$1@pull.gecm.com
"Martin Dowie" <martin.dowie@nospam.baesystems.com> writes:
> > Backing up a bit, why do you want to do this? I can guess that you
> > want to turn off some debugging output. It is _far_ better to define a
> > Debug_IO package, with a Boolean or Integer debug enabled variable.
> > Then have a style guide that says "Ada.Text_IO is _forbidden_ in
> > delivered code; use Debug_IO if you need debug output".
>
> In our 'real' development code this is exactly what will be done (we have
> a Project.Text_IO package which is the same for all projects, and we
> slap on whatever the OS provides in the way of 'Simple_IO' via the body,
> or 'null'ed for production)
>
> This is for testing and timing purposes.
Hmm, another requirement I use is "test and time what you fly". It is
easier to use Project.Text_IO from the start, than to change to it
later.
Also, packages should be testable without editing; use child packages to
get access to private stuff.
> So far, from what simple tests we've run each character seems to be
> taking about 10ms to display via serial and 0.03ms via ethernet -
> does this sound reasonable to everyone?.. :-)
Hmm. Assuming 9600 baud serial link, 9 bits per character (with
parity), that's about 1 ms per character. So you seem to have a
significant tasking overhead in the serial implementation.
--
-- Stephe
next prev parent reply other threads:[~2001-04-11 12:04 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-04-10 14:32 redirecting the standard output Martin Dowie
2001-04-10 15:01 ` redirecting the standard output to different std outputs? Frank
2001-04-10 16:17 ` Mark Biggar
2001-04-10 20:38 ` James Rogers
2001-04-13 16:23 ` Tucker Taft
2001-04-10 16:08 ` redirecting the standard output Stephen Leake
2001-04-10 16:46 ` Stephen Leake
2001-04-10 17:13 ` Smark
2001-04-10 21:00 ` Ted Dennison
2001-04-11 7:32 ` Martin Dowie
2001-04-11 12:04 ` Stephen Leake [this message]
2001-04-11 14:15 ` Martin Dowie
2001-04-12 1:41 ` tmoran
2001-04-12 7:08 ` Martin Dowie
2001-04-10 16:46 ` Smark
2001-04-11 12:06 ` Stephen Leake
2001-04-11 14:11 ` Martin Dowie
2001-04-11 0:04 ` Jeff Creem
2001-04-11 9:48 ` Graham Baxter
2001-04-12 12:23 ` Martin Dowie
2001-04-12 14:01 ` Smark
2001-04-12 19:52 ` martin.m.dowie
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