AMD FX "Bulldozer" Review - (4) !exclusive! Excuse for 1-Threaded Perf.

[dess]

i am curious about the whole 1a and 1b thread that want to share resources. i assume this means they use the same L2 to their advantage, but im curious if software can determine if they want to do that, and then can windows give them the right thread assignments to accomplish it? and even if they did, how much of a bonus would there be, if the end result is just a little less L2 being used then it could never be better than independent CUs when looking at it from just performance. but if the data sharing increases code efficiency then there could be alot more perf. but i dont really know much about this kind of stuff

I wonder how Win8 judges which approach to choose "real-time". Perhaps it simply couples child-threads with their mother thread? That's not always good.

Anyway, if they're not going to implement it in Win7, as well, I hope at least they will enable the SMT-aware approach for BD (if Win7 really supports it already), that's still much better than the default one.

Can I supose that the 256 bit FPU remain fully active ?

Most probably, but worth a test.

so the fp performance will not be directly afected.

Actually, it raises FP performance, as well, for less-threaded apps.