Re: 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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