* Jeremy Fitzhardinge <[email protected]> wrote:
> On 10/06/2011 10:40 AM, Jeremy Fitzhardinge wrote:
> > However, it looks like locked xadd is also has better performance: on
> > my Sandybridge laptop (2 cores, 4 threads), the add+mfence is 20% slower
> > than locked xadd, so that pretty much settles it unless you think
> > there'd be a dramatic difference on an AMD system.
>
> Konrad measures add+mfence is about 65% slower on AMD Phenom as well.
xadd also results in smaller/tighter code, right?
Thanks,
Ingo
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