[vtkusers] Choice of PC's

Berk Geveci berk.geveci at kitware.com
Wed Feb 7 12:07:25 EST 2001

	VTK has shared (via windows threads, pthread or sproc) and distributed 
	memory multiprocessor (via MPI) support. There are various levels
	at which these are available. I will, at one point, write some sort
	of documentation about these. By default, almost all of the imaging
	pipeline and a small part of the graphics pipeline will automatically
	launch multiple threads if there are multiple processors (in the
	directory, if you look for filters which has a Threader instance
	you will find most of the multi-threaded filters. On the imaging side, 
	there are very few filters which do not use threads). 


> Also, I don't believe the vtk code (although I haven't looked at the
> internal details) is set up to take advantage of multiple processors
> (I'm certain one of the developers will correct me if I'm wrong) so
> you're probably going to see very little benefit from a dual processor
> system.  The OS will hopefully run on one processor while the vtk
> program runs on the other, but the vtk program will not run on both
> processors simultaneously.
> Dave

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