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MikeB on 17 September 2007
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MikeB said:
@ erikguy

Xbox 360 CPU: 3 main threads, and 3 secondary threads.

CELL: 8 main threads, and only 1 secondary thread running on the PPE.

In terms of peak processing potential that's just 3 cores (Xenon, XBox 360) vs 8 processors (Cell, PS3). 2 threads on the PPE and one thread per SPE giving you a total of 9 hardware threads. Software threads are not limited so you can have as many of these as you wish!

A single core CPU allowing for 2 hardware threads does not equal to two of these CPUs running a single thread.

The comment regarding software threads of course regards the SPEs as well. Just to clarify considering some of things I read in the forums.

You can create software threads, multiple threads are held in a local store and the SPE switches between them when a thread stalls on memory access.

@sieanr

 I'll have a look at this thread again tomorrow to see what you were referring to.



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