On Wed, 22 Feb 2006, Greg Lindahl wrote:
On Wed, Feb 22, 2006 at 05:45:06PM -0500, Mark Hahn wrote:
these days, gcc does pretty well compared to commercial compilers, if you
take care to -march, -msse2 and other tweaks. I can't see why this
pretty respectable code quality for c/c++/etc wouldn't also apply to
fortran. even the ada and java people seem to be almost happy with
gcc's code-gen...
Er, it depends. gcc is a pretty good compiler for integer, but it's
way behind the curve for numerical code and peak options. For Fortran,
there's also the issue that performance-sensitive use of intrinsics
really needs them expanded and optimized in-line. I don't know if
g95 or gfortran have implemented these yet, but I do see people showing
relatively poor performance for those cases.
-- greg
(disclaimer: we sell compilers, but then again, we compare against
gcc in a regular basis...)
Yeah, yours was the first compiler I suggested. And I suspect/hope that
we end up getting at least one copy of your whole suite to build
against. The software the project will distribute should certainly be
ABLE to build against gcc and g++ and g-fort*-whatever, but for people
who plan to use it in expensive high end resources, it is just silly to
give up even a very few percent in overall performance on many many
systems if it can be had for a few hundred dollars.
rgb
--
Robert G. Brown http://www.phy.duke.edu/~rgb/
Duke University Dept. of Physics, Box 90305
Durham, N.C. 27708-0305
Phone: 1-919-660-2567 Fax: 919-660-2525 email:[EMAIL PROTECTED]
_______________________________________________
Beowulf mailing list, [email protected]
To change your subscription (digest mode or unsubscribe) visit
http://www.beowulf.org/mailman/listinfo/beowulf
