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On Apr 14, 2004, at 1:23 AM, Bernd Sieker wrote:

> An interesting related question: can you mix SuperSPARC (TI) and
> HyperSPARC (Ross) CPUs? I have been running an SS20 for some months
> with 60MHz SuperSPARC plus 75MHz SuperSPARC-II without problems,
> but could I add, say, a Twin HyperSPARC 50MHz to an existing
> SuperSPARC 60MHz?

My guess would be "no".  For different CPUs of the same class (all of 
those SuperSPARC CPUs are the same class), that works because the cache 
functions, etc. are all the same for CPUs in the class.

But if you mix CPUs of different classes (e.g. SuperSPARC and 
HyperSPARC), you then have to deal with cache flushing and what not 
different for each CPU, which is a problem so difficult and 
complicated, it's not worth solving.

         -- Jason R. Thorpe <thorpej@wasabisystems.com>


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