No, Bulldozer won't have HT, but a BD module can handle 2 threads. Then again, I didn't see any 6 BD module chip anywhere on the roadmap so I don't think we're going to see any AMD offering with 12 thread capacity anytime soon (at least for desktop segment).
No. AMD does not have hyper-threading now, nor will they have it in their next arch (Bulldozer).
AMD multi-threading on a single 'core' is called CMT. They have not 'officially' said BD will support CMT (which is now commonly called 'Cluster-based Multi-threading') but what they have said is that their implementation is nothing like what Intel does with hyper-threading.
My understanding is Intel takes duplicate thread instructions and executes in the same pipeline. AMD will fetch duplicate thread instructions and execute two pipelines across a 'module' with 2 integer schedulers, each having their own dedicated chunk of L1 data cache and shared L2 and L3.
As you guys have noted, this is where AMD is 're-writing' techno-speak somewhat in that they reference a module as having two integer units or 'cores'.
The first desktop Bulldozer (Zambezi) will contain four modules for a total of eight 'cores'. Enterprise Opterons will combine six or eight modules (Valencia and Interlagos) for a total of 12 or 16 'cores'.
The 'scaling' across modules is said to be spectacular --- near 96% in some instances --- as opposed to the Intel HT.
You will be tested later ---
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