Compiling with GCC
PROTEUS ONLY
GCC will generate executables which are likely not as fast as the vendor-specific compilers' output, i.e. Intel Compiler for Intel CPUs, and Open64 for AMD CPUs.
Optimization Flags
Please see the Proteus Hardware and Software article for a list of the specific CPUs installed in Proteus. That will determine what optimization and feature flags you may use during compilation.
As of 2014-03-04, these options/flags may be used for both Intel and AMD CPUs:
-mavx -mfpmath=sse
The cpu-type[1] which applies to both Intel and AMD nodes is
corei7-avx.
The Intel C6220 and C6220 II nodes have cpu-type core-avx-i
The AMD C6145 nodes have cpu-type corei7-avx
This means that, instead of separate CPU feature flags "-mavx -mfpmath=sse", you may just use:
- for executables that will run on both Intel and AMD:
-march=corei7-avx - for executables that will run only on Intel:
-march=core-avx-i
Alternatively, you may log on to the login host which matches the target
execution hosts (proteusi01 for Intel, proteusa01 for AMD), and use:
-march=native