Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern AMD64 with MCP51 laptops

Rene Herman
2007-12-11T14:17:59Z

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