Re: [PATCH] x86_64, asm: Work around AMD SYSRET SS descriptor attribute issue

[Denys Vlasenko]

On 04/27/2015 09:11 PM, Borislav Petkov wrote:
> A:     709.528485252 seconds time elapsed                                          ( +-  0.02% )
> B:     708.976557288 seconds time elapsed                                          ( +-  0.04% )
> C:     709.312844791 seconds time elapsed                                          ( +-  0.02% )
> D:     709.400050112 seconds time elapsed                                          ( +-  0.01% )
> E:     708.914562508 seconds time elapsed                                          ( +-  0.06% )
> F:     709.602255085 seconds time elapsed                                          ( +-  0.02% )

That's about 0.2% variance. Very small.

Sounds obvious, but. Did you try running a test several times?
Maybe you are measuring random noise.


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