Subj : Re: A question about atomic_ptr
To   : comp.programming.threads
From : Peter Dimov
Date : Mon Apr 18 2005 08:39 pm

Chris Thomasson wrote:
>> "Should" and "possibly" aside, which one is faster
>
> mfence is faster than LOCK.
>
>> and by what margin? ;-)
>
>
> Go ahead and try running the following code on your system:

[...]

mfence fails with exception C000001E, "an attempt was made to execute an 
invalid lock sequence". Athlon XP 2800+.

.