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DateTue, 11 Dec 2007 15:15:55 +0100
FromRene Herman <>
SubjectRe: RFC: outb 0x80 in inb_p, outb_p harmful on some modern AMD64 with MCP51 laptops
On 11-12-07 14:32, Paul Rolland wrote:

>> On 11-12-07 13:08, David Newall wrote:
>>
>>> Rene Herman wrote:
> 
>> (*) some local testing shows it to be almost exactly that for both out and 
>> in on my own PC -- a little over. If anyone cares, see attached little test 
>> program. The "little over" I don't worry about. 0 us delay is also fine for 
>> me and if any code was _that_ fragile it would have broken long ago.
> 
> Some results :

Okay, these vary to wildly for you and might I suppose be a serialising 
artifact or some such. Give me a bit and I'll try to improve it...

Rene


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