Groucho said:
Interesting, you're telling me the hardware threading on the PPU doesn't alternate threads each cycle? That's something I certainly wasn't aware of.
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Yes, that's exactly what I'm telling you. SMT does fine-grained division of the CPU's resources, for example thread 1 uses the memory access hardware while thread 2 does a calculation.
http://en.wikipedia.org/wiki/Simultaneous_multithreading
However, I'm actually finding some conflicting sources on this. I'm not sure whether the PPE does interleaved or simultaneous multi-threading anymore, so you may be right on this one (in that case apologies in advance).
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