通过CPUID命令访问CPU详细信息
通过cpuid命令，来获取CPU的信息，这个命令的底层是通过CPUID指令。获取的内容比/proc/cpuinfo要详细很多,如果要获取详细信息就使用cpuid命令吧。
例如，执行
#cpuid
CPU 0:
vendor_id = "GenuineIntel"
version information (1/eax):
processor type = primary processor (0)
family = Intel Pentium Pro/II/III/Celeron/Core/Core 2/Atom, AMD Athlon/Duron, Cyrix M2, VIA C3
(6)
model = 0x5 (5)
stepping id = 0x1 (1)
extended family = 0x0 (0)
extended model = 0x4 (4)
(simple synth) = Intel Mobile Core i3-4000Y / Mobile Core i5-4000Y / Mobile Core i7-4000Y / Mobile Pent
ium 3500U/3600U/3500Y / Mobile Celeron 2900U (Mobile U/Y) (Haswell), 22nm
miscellaneous (1/ebx):
process local APIC physical ID = 0x0 (0)
cpu count = 0x0 (0)
CLFLUSH line size = 0x8 (8)
brand index = 0x0 (0)
brand id = 0x00 (0): unknown
feature information (1/edx):
x87 FPU on chip = true
virtual-8086 mode enhancement = true
debugging extensions = true
page size extensions = true
time stamp counter = true
RDMSR and WRMSR support = true
