From: "(see below)" <yaldnif.b@blueyonder.co.uk>
Subject: Re: Large arrays (again), problem case for GNAT
Date: Wed, 13 Apr 2005 23:01:23 +0100
Date: 2005-04-13T23:01:23+01:00 [thread overview]
Message-ID: <BE835543.C1F5E%yaldnif.b@blueyonder.co.uk> (raw)
In-Reply-To: ltGdnU4oIZ3j5cDfRVn-qw@megapath.net
On 13/4/05 8:54 pm, in article ltGdnU4oIZ3j5cDfRVn-qw@megapath.net,
"Randy Brukardt" <randy@rrsoftware.com> wrote:
> Text_IO.Put_Line ("Writing to all elements in loop");
> for I in Big_T'Range loop
> Big (I) := 0.0;
> end loop;
>
> Text_IO.Put_Line ("Writing to 'Last element");
> Big (Big_T'Last) := 0.0; -- Fails!!!!!
For better confirmation of success I changed this to:
> Text_IO.Put_Line ("Writing to all elements in loop");
> for I in Big_T'Range loop
> Big (I) := Float(i);
> end loop;
>
> Text_IO.Put_Line ("Reading 'Last element");
> if Big (Big_T'Last) /= Float(Big_T'Last) then
> Text_IO.Put_Line ("...FAILED");
> else
> Text_IO.Put_Line ("...OK");
> end if;
It compiled and ran perfectly on my 640Mb Macintosh iBook,
GNAT 3.3 20040913 (GNAT for Mac OS X build 1650):
> First element attribute 1
> Last element attribute 210000000
> Address of first element is 33587200
> Address of last element is 873587196
> (Last element should be at higher address than first)
> Address of last element is 873587196
> Writing to all elements in loop
> Reading 'Last element
> ...OK
I see that Adrian is using Linux.
Is Linux not notorious for problems of this kind?
I seem to remember that it has some kind of optimistic allocator
that can grant a memory allocation request, only for it to fail
when you try to use the memory you appear to have been granted.
--
Bill Findlay
<surname><forename> chez blueyonder.co.uk
next prev parent reply other threads:[~2005-04-13 22:01 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-04-13 12:46 Large arrays (again), problem case for GNAT Dr. Adrian Wrigley
2005-04-13 13:10 ` Larry Kilgallen
2005-04-13 13:24 ` Alex R. Mosteo
2005-04-13 13:31 ` Marc A. Criley
2005-04-13 19:52 ` Jeffrey Carter
2005-04-13 19:54 ` Randy Brukardt
2005-04-13 22:01 ` (see below) [this message]
2005-04-14 0:16 ` Robert A Duff
2005-04-14 1:11 ` Alexander E. Kopilovich
2005-04-14 7:29 ` Dmitry A. Kazakov
2005-04-14 7:45 ` Duncan Sands
[not found] ` <1113464720.9829.20.camel@localhost.localdomain>
2005-04-14 13:59 ` Marius Amado Alves
2005-04-14 14:09 ` Dr. Adrian Wrigley
2005-04-14 14:40 ` (see below)
[not found] ` <389d1596e98f95f0fdddc40afc0647b7@netcabo.pt>
2005-04-14 14:14 ` Duncan Sands
2005-04-14 15:18 ` Robert A Duff
2005-04-14 15:24 ` Robert A Duff
2005-04-15 5:21 ` Randy Brukardt
2005-04-15 11:49 ` Dr. Adrian Wrigley
2005-04-15 13:21 ` Dmitry A. Kazakov
2005-04-15 14:31 ` Dr. Adrian Wrigley
2005-04-15 14:57 ` Dmitry A. Kazakov
2005-04-14 15:39 ` Dr. Adrian Wrigley
2005-04-14 15:48 ` Dmitry A. Kazakov
2005-04-14 21:19 ` Robert A Duff
2005-04-15 8:23 ` Dmitry A. Kazakov
2005-04-15 8:38 ` Duncan Sands
2005-04-15 9:16 ` Dmitry A. Kazakov
2005-04-15 18:30 ` Mark Lorenzen
2005-04-15 19:06 ` Robert A Duff
[not found] ` <iSSDSN2L04G1@VB1162.spb.edu>
2005-04-14 7:34 ` Duncan Sands
2005-04-13 22:35 ` Robert A Duff
2005-04-14 11:40 ` Dr. Adrian Wrigley
2005-04-14 10:44 ` Dr. Adrian Wrigley
2005-04-14 15:03 ` Robert A Duff
2005-04-14 16:46 ` Dmitry A. Kazakov
2005-04-14 18:30 ` Pascal Obry
2005-04-14 19:45 ` Dmitry A. Kazakov
-- strict thread matches above, loose matches on Subject: below --
2005-04-13 13:52 Duncan Sands
2005-04-13 14:20 ` Dr. Adrian Wrigley
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