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SubjectRe: [RFT] Port 0x80 I/O speed
Date
$ for i in `seq 5`; do ./port80; sleep 1; done
cycles: out 5260, in 2372
cycles: out 5260, in 2384
cycles: out 5260, in 2323
cycles: out 5270, in 2382
cycles: out 5259, in 2323

$ cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 7
model name : Pentium III (Katmai)
stepping : 3
cpu MHz : 501.208
cache size : 512 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 : 993.28

#########

$ for i in `seq 5`; do ./port80; sleep 1; done
cycles: out 1214, in 1095
cycles: out 1215, in 1094
cycles: out 1214, in 1095
cycles: out 1216, in 1095
cycles: out 1213, in 1093

$ cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 11
model name : Intel(R) Celeron(TM) CPU 1000MHz
stepping : 1
cpu MHz : 1002.285
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 sep mtrr pge mca cmov pat
pse36 mmx fxsr sse
bogomips : 1998.84


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