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On Fri, Aug 7, 2015 at 12:48 PM, Coda Highland <chighland@gmail.com> wrote:
> Oh, there quite is:
>
> http://x86.renejeschke.de/html/file_module_x86_id_159.html

ah, ok.  yes, this is avoidable in some cases, like CAS and simple
atomics.  still, the time penalty is the invalidation request that
must be propagated to interested cores. (fortunately, this is only
sent to those other cores that actually hold the relevant address in
cache)

the numbers i've shared are totally "lock- and cas-free"  :-)

-- 
Javier