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SubjectRe: [RFT] Port 0x80 I/O speed
On Wed, Dec 12, 2007 at 12:31:18AM +0100, 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.

vendor_id : GenuineIntel
cpu family : 6
model : 15
model name : Intel(R) Core(TM)2 CPU 6600 @ 2.40GHz
stepping : 6

cpu MHz : 2394.000
cycles: out 1830, in 1166

cpu MHz : 1596.000
cycles: out 1925, in 1266

##

vendor_id : GenuineIntel
cpu family : 6
model : 8
model name : Pentium III (Coppermine)
stepping : 10

cpu MHz : 850.000
cycles: out 1142, in 475

cpu MHz : 700.000
cycles: out 914, in 406

##

vendor_id : AuthenticAMD
cpu family : 6
model : 7
model name : AMD Duron(tm) processor
stepping : 1

cpu MHz : 1300.108
cycles: out 2562, in 2562

##

vendor_id : GenuineIntel
cpu family : 6
model : 5
model name : Pentium II (Deschutes)
stepping : 2

cpu MHz : 449.242
cycles: out 607, in 272

--
Ville Syrjälä
syrjala@sci.fi
http://www.sci.fi/~syrjala/
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