[G4] OS X SMP

[sr ferenczy]

true, inter-machine communications is a result of infiniband and some 
custom software, but intra-machine communication is still by the OS. if 
OS X couldnt get above 60% efficiency with SMP, then the whole cluster 
couldnt. They probably have kernel level controls with their software, 
but i would think intra-machine, all code would have to go through the 
X kernel... maybe not though...?

sandor


On Feb 8, 2004, at 12:48 PM, Jonathan Armstrong wrote:

>
> On Feb 8, 2004, at 10:04 AM, sr ferenczy wrote:
>
>>> Does the VT cluster run Mac OS X -- and is it really relevant to our 
>>> issue?
>>>
>>> f
>>
>> yes it does, and yes, i believe it is highly relevant. it is the 
>> largest working example of SMP we have on the macintosh, and i 
>> believe it shows how well the OS handles SMP.
>
> The VT cluster is not an SMP machine, and OS X isn't directly 
> responsible for it's process scheduling.
>
> It is a relevant case for parallelism in general, and the Apple 
> hardware has some advantageous properties that are being exploited in 
> this system, but in this case the OS has less to do with performance 
> than you might think.