On Mon, Oct 28, 2002, Scott Brozell wrote:
>
> Generally, a 64 bit addressable executable is only recommended for
> applications that require the extra addressing space because a
> 32 bit addressable executable will have superior performance by a
> couple of percent.
In my experience, there are some cases for sander where -n32 is quite a bit
faster than -64 on SGI processors. This is why we have specified -n32
compilation, even for machines where the default is -64. I don't have
details handy right now, but there are only a few, pretty unusual, situations
where sander requires 64 bit addressing. Nmode, is another story, and
we often compile 64-bit versions in order to do normal mode analysis.
..hope this helps...dac
--
==================================================================
David A. Case | e-mail: case_at_scripps.edu
Dept. of Molecular Biology, TPC15 | fax: +1-858-784-8896
The Scripps Research Institute | phone: +1-858-784-9768
10550 N. Torrey Pines Rd. | home page:
La Jolla CA 92037 USA | http://www.scripps.edu/case
==================================================================
Received on Mon Oct 28 2002 - 19:41:15 PST
