Messages in this thread | | | Date | Sat, 26 Jan 2002 03:03:41 +0100 | From | Andi Kleen <> | Subject | Re: [PATCH] syscall latency improvement #1 |
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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)
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