Ultrasparc-III+ performance of GCC 3.1

["Alaeddin A. Aydiner" <aydiner at empc22 dot ece dot uiuc dot edu>]

Hello,

I was wondering if anybody could suggest compiler flags to improve the
performance of some numerical C++ code I have. My problem is that the
code seems to run more slowly on the ultrasparcs here than it does on a
linux PC although the ultrasparc machines have excellent C and Fortran
performance and are, on the whole, a lot faster. I should note that
Solaris does not provide 64-bit versions of libc.a and libm.a, which
prevented me from producing a staticly linked executable as I could on
the linux machine.

The flags I have used thus far are:

-m64 -O3 -mcpu=ultrasparc -mtune=ultrasparc

Would upgrading to GCC 3.1.1 or 3.2 help? The release notes do not seem
to say much about Sparcs.

Thanks very much.

-- 
Alaeddin Ahmet Aydiner - PhD candidate         _        _        _
Office Tel: 217 333 0434                      / \      / \      / \
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