Rene Herman wrote:
> Good day.
>
> Would some people on x86 (both 32 and 64) be kind enough to compile
> and run the attached program? This is about testing how long I/O port
> access to port 0x80 takes. It measures in CPU cycles so CPU speed is
> crucial in reporting.

$ cat /proc/cpuinfo
processor       : 0
vendor_id       : GenuineIntel
cpu family      : 6
model           : 8
model name      : Pentium III (Coppermine)
stepping        : 6
cpu MHz         : 930.347
cache size      : 256 KB
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 2
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov 
pat pse36 mmx fxsr sse
bogomips        : 1861.99
clflush size    : 32

cycles: out 1183, in 706

cycles: out 1183, in 707

cycles: out 1182, in 706

cycles: out 1182, in 706

cycles: out 1183, in 706

cycles: out 1182, in 706

cycles: out 1182, in 706

cycles: out 1183, in 706

cycles: out 1183, in 707

cycles: out 1183, in 707

cycles: out 1183, in 706

cycles: out 1183, in 706

cycles: out 1183, in 706

cycles: out 1182, in 706

cycles: out 1183, in 707

cycles: out 1183, in 707

cycles: out 1183, in 706

cycles: out 1183, in 706

cycles: out 1182, in 706

cycles: out 1183, in 706

cycles: out 1183, in 706

cycles: out 1183, in 706

Dave.


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