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Processor family
  1. Opteron/Athlon64/Hammer/K8 (MK8)
  2. Intel P4 / older Netburst based Xeon (MPSC)
  3. Core 2/newer Xeon (MCORE2) (NEW)
  4. Intel Atom (MATOM) (NEW)
> 5. Generic-x86-64 (GENERIC_CPU)

I'm compiling the linux kernel,how can I know which one to choose?

processor   : 0
vendor_id   : GenuineIntel
cpu family  : 6
model       : 23
model name  : Intel(R) Core(TM)2 Duo CPU     E7500  @ 2.93GHz
stepping    : 10
cpu MHz     : 2926.030
cache size  : 3072 KB
fpu     : yes
fpu_exception   : yes
cpuid level : 13
wp      : yes
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 up pni ssse3 cx16 sse4_1 lahf_lm
bogomips    : 5852.06
clflush size    : 64
cache_alignment : 64
address sizes   : 40 bits physical, 48 bits virtual
power management:
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You have a Core(TM)2 Duo - which appears to match option 3. – Iain Mar 21 '11 at 9:22
up vote 3 down vote accepted
cat /proc/cpuinfo

and you will see the processor what you have.

In your case is option 3.

From kernel help about MCORE2

Select this for Intel Core 2 and newer Core 2 Xeons (Xeon 51xx and 53xx) CPUs. You can distinguish newer from older Xeons by the CPU family in /proc/cpuinfo. Newer ones have 6 and older ones 15 (not a typo)

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I've pasted the cpu info here,but which family does it belong? – yum Mar 21 '11 at 9:19

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