Should I use -march=nocona
or -march=core2
when compiling binaries for this processor with gcc 4.3?
vendor_id : GenuineIntel cpu family : 6 model : 15 model name : Intel(R) Xeon(R) CPU X3220 @ 2.40GHz stepping : 8 cpuid level : 10 flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss syscall nx lm constant_tsc arch_perfmon pebs bts rep_good pni ssse3 cx16 lahf_lm
I cannot really find if this CPU is already core2 architecture... Only find information about the quad core variants, but this CPU is only dual core.