On Fri, Jan 25, 2002 at 05:53:57PM -0800, Linus Torvalds wrote:
>
> On 26 Jan 2002, Andi Kleen wrote:
> >
> > It doesn't explain the Athlon speedups. On athlon cli is ~4 cycles.
>
> .. and it probably serializes the instruction stream.
I have word from AMD engineering that it doesn't stall the pipeline
or serializes.
(I asked the question during the design of the x86-64 syscall code)
-Andi
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