| Date | Wed, 12 Dec 2007 09:17:15 +0100 | From | Paolo Ornati <> | Subject | Re: [RFT] Port 0x80 I/O speed |
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On Wed, 12 Dec 2007 00:31:18 +0100 Rene Herman <rene.herman@gmail.com> wrote: > > and on a PII 400 (Intel 440BX chipset) a constant: > > rene@6bap:~/src/port80$ su -c ./port80 > cycles: out 553, in 251 > > Results are (mostly) independent of compiler optimisation, but testing with > an -O2 compile should be most useful. Thanks! >
### Core2 Duo 1.8 GHz ###
X86_64 -m32 -O2:
$ for i in `seq 5`; do sudo ./port80; sleep 1; done cycles: out 1498, in 964 cycles: out 1498, in 964 cycles: out 1499, in 964 cycles: out 1498, in 964 cycles: out 1498, in 965
processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 15 model name : Intel(R) Core(TM)2 CPU 6300 @ 1.86GHz stepping : 6 cpu MHz : 1864.805 cache size : 2048 KB physical id : 0 siblings : 2 core id : 0 cpu cores : 2 fpu : yes fpu_exception : yes cpuid level : 10 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 ht tm pbe syscall nx lm constant_tsc arch_perfmon pebs bts rep_good pni monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr lahf_lm bogomips : 3731.82 clflush size : 64 cache_alignment : 64 address sizes : 36 bits physical, 48 bits virtual power management:
[...]
-- Paolo Ornati Linux 2.6.24-rc4-g94545bad on x86_64
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