Hi Anton,

Well, the "march=barcelona" option might give you a few more percentage points, since the "amdfam10" is for the mainstream processors, not Opteron specific ;)

Best regards,
Bruno



PS: This line on the reference guide you followed just cracked me up:
Has implied the possible & unintended side effect to f*** whole program... :D

Thanks Bruno. According to the gcc documentation, barcelona and fam10 seem to be equivalent: http://gcc.gnu.org/onlinedocs/gcc/i3...4-Options.html. Am I reading that wrong?

Good catch! I was hoping they wouldn't do the exact same optimizations :(