Optimization level with PGI

[vdaniel@lmd_ens_fr]

Hello, when running CAM with the PGI compilers, the optimization level is set to -O1 by default.
When changing this level to -O2, I get a segmentation fault (with and without OpenMP).

Is there a way to improve run time with PGI compilers ??
Thanks,
Vincent.

 

[rneale]

Could you provide more information as to the nature of the error? Particularly what was CAM's output just prior to the segmentation fault. As a caution the Portland Group compiler has not provided consistantly stable performance with CAM so be cautious when changing the optimization level.

 

[vdaniel@lmd_ens_fr]

I had this seg fault when compiling CAM with -O2 and PGI 6.0-4
I tried with PGI 6.1-2 and it seems to work fine.
V