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SubjectRe: [RFT] Port 0x80 I/O speed
Jiri Slaby wrote:
> On Dec 12, 2007 9:48 AM, Jiri Slaby <jirislaby@gmail.com> wrote:
>> On 12/12/2007 12:31 AM, 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
>
> model name : Intel(R) Xeon(R) CPU E5335 @ 2.00GHz
> cycles: out 3217, in 1898

1.6 µs, on the high end....
> model name : Dual Core AMD Opteron(tm) Processor 275
> cycles: out 5508, in 5524

Definitely an outlier; 2.5 µs here.

-hpa
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