Subj : Re: Using hierarchical memory as an acquire memory barrier for
To   : comp.programming.threads,comp.arch
From : Alexander Terekhov
Date : Tue Sep 13 2005 08:10 pm


David Hopwood wrote:
[...]
> I don't think that the cost of acquire barriers, ... Note that these 
> barriers are almost certainly not needed anyway on x86[-64], PPC 

You probably mean ddacq in conjunction with loads (RMW stuff aside 
for a moment). Because extra sync is certainly needed for both ccacq_* 
and plain acq loads on PPC.

regards,
alexander.

.