1. Source Build
svn co http://sunshout.googlecode.com/svn/trunk/os/cpuid cpuid
cd cpuid
make
2. Test
Basic Usage
2.1 print usage
./cpuid -h
[root@tesla-xen cpuid]# ./cpuid -h
Usage: cpuid -[h|b|f|s]
Options:
-h print help
-b print cpu brand
-f <eax> print standard CPUID functions
-s print cpu signature
2.2 print CPU branch
./cpuid -b
[root@tesla-xen cpuid]# ./cpuid -b
GenuineIntel
2.3 print CPU flags
./cpuid -s
2.4 print CPU register value (eax,ebx,ecx,edx)
./cpuid -f <eax register value>
This option shows raw values of eax, ebx, ecx, and edx register.
example
To check Architectural Performance Monitor Feature (Function 0Ah)
./cpuid -f 10 (since hex 0xA is integer 10.)
[root@tesla-xen cpuid]# ./cpuid -f 10
EAX:00000111001100000000010000000011
EBX:00000000000000000000000000000000
ECX:00000000000000000000000000000000
EDX:00000000000000000000011000000011
Reference
[1] Intel Processor Identification and the CPUID Instruction