All Autodesk's CAD products based on AutoCAD 2000i, 2002, 2004, 2005, 2006, 2007, 2008, 2009 and higher are multi-threaded, display operations run on multiple processors.
The WHIPTHREAD variable controls the way how AutoCAD uses the second processor (or core) for display operations.
0 - use only a single processor (as A2000)
1 - regen done on multiple CPUs
2 - redraw done on multiple CPUs
3 - both regens and redraws done on multiple CPUs
Multi-CPU and multithreading systems are used by AutoCAD also for other operations, e.g. for the mental ray rendering (2007 and higher), background publishing, xref loading, or for background loading of .NET Framework.
Intel processors with the hyperthreading (HT) and dual-core technology are considered by the operating system as multiprocessor PCs.
Have we helped you? If you want to support the CAD Forum web service, consider buying one of our CAD applications, or our custom software development offerings, or donating via PayPal (see above).
You may also add a link to your web - like this "fan" link:
Featuring: Track your time spent working on AutoCAD or Revit jobs - automatically with CADstudio JobTime
Please use these tips at your own risk. CAD Studio (Xanadu) is not responsible for possible problems that may occur as a result of using any of these tips.
CAD Forum - tips, tricks, help, how-tos and FAQ for AutoCAD, LT, Inventor, Revit, Map, Civil 3D, MapGuide, 3ds max and other Autodesk software (support by CAD Studio)