Date:	Thu, 15 Apr 1999 02:09:05 +0100
From:	Mark Brown <broonie AT tardis DOT ed DOT ac DOT uk>
To:	Bill Thorson <thorson AT atmos DOT colostate DOT edu>
Cc:	pgcc AT delorie DOT com
Subject:	Re: performance question
Message-ID:	<19990415020905.B231@tardis.ed.ac.uk>
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	pgcc AT delorie DOT com
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In-Reply-To:	<3714B295.DBFA9425@atmos.colostate.edu>; from Bill Thorson on Wed, Apr 14, 1999 at 09:21:58AM -0600
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On Wed, Apr 14, 1999 at 09:21:58AM -0600, Bill Thorson wrote:

> I'M NOT A MEMBER OF THIS LIST TO PLEASE REPLY TO ME AND NOT THE LIST.

Unfortunately, it has Reply-To: set to the list, so some replies may not
make it to you.

> I am involved with numerical weather modeling and we sometimes use
> Pentium class computers running Linux.  Does the PGCC compiler patch
> also provide speed improvements for g77?  Is this something that I
> should try?  When you have a model that may runs for 7 days a 5-10%
> speed-up IS significant.

The optimizations are in the back end, so g77 gets the improvements.
Exactly what you're going to see can only be found by benchmarking and
fine-tuning the options.  You may also encounter bugs, but if you're
running compute-intensive jobs on Pentium hardware it's probably worth
trying.  The FAQ contains a number of suggestions for optimizations to
try.

There have been a number of problems reported in the 1.1.2 release - 
you might want to try 1.1.1 or the latest development sources (avalible 
in CVS).

-- 
Mark Brown  mailto:broonie AT tardis DOT ed DOT ac DOT uk   (Trying to avoid grumpiness)
            http://www.tardis.ed.ac.uk/~broonie/
EUFS        http://www.eusa.ed.ac.uk/societies/filmsoc/

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