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You can also use XGrid if you want an integrated solution. Technically  
you can modify the script that submits it to SGE and make it so it  
starts multiple processes locally.

Evi Vanoost
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(585) 275-4549



On Aug 26, 2009, at 5:59 AM, Ajay Garg wrote:

> Dear Dave,
>
> Thanks a lot.
> So  I have to learn about SGE installation.
>
> Regards,
> -Ajay
> On 26-Aug-09, at 10:35 AM, Dave Flitney wrote:
>
>> Dear Ajay,
>>
>> On 26 Aug 2009, at 01:38, Ajay Garg wrote:
>>
>>> Dear FSL users
>>>
>>> The snow leopard is coming this Friday. They say it can make use  
>>> of multiple processors. I
>>> have 8-core Mac Pro? What could be advantage in the processing  
>>> time of TBSS? Will there
>>> be any need for SGE grid engine installation?
>>>
>>> Regards.
>>> Ajay
>>>
>>
>> As far as I'm aware all versions of MacOS X have been able to use  
>> multiple processors where available, however, FSL scripts and  
>> programs are not inherently able to use multiple processors, i.e.,  
>> "threaded". Instead these scripts use scheduling software, SGE, and  
>> divide the tasks into smaller, independent parallelisable sections.  
>> This form of parallel processing has the advantage that it is  
>> compatible with using both multiple processors and multiple hosts  
>> and doesn't need any complex thread code to achieve parallelism.
>>
>> So the short answer is that any of Snow Leopard's new multiple  
>> processor capabilities are not  going to make any difference to  
>> TBSS or any other FSL software. You still need SGE or similar  
>> installed to take advantage of your Mac's multiple cores.
>>
>> Regards, Dave
>>
>> --
>> Dave Flitney, IT Manager
>> Oxford Centre for Functional MRI of the Brain
>> E:[log in to unmask] W:+44-1865-222713 F:+44-1865-222717
>> URL: http://www.fmrib.ox.ac.uk/~flitney
>