CAD tip # 5847:

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% platform category

An undocumented AutoCAD command sets CPU affinity.

The undocumented (and unsupported) AutoCAD command DUMPMEMALLOC offers among other the option Affinity which enables the so called "affinity" - an association of a Windows process (ACAD.EXE in this case) with a specific processor (or CPU core) on multi-processor and multi-core (dual-core, quad-core) computers. After enabling this option, AutoCAD will run on a single (the first) CPU/core only.

A similar function can be set in the Windows Task manager.

ACAD

* CAD

8.11.2007 4904x

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applies to: AutoCAD ·

See also:
Tip 4905:	Using multiprocessing in AutoCAD.
Tip 2075:	How to enable multiple CPU support in 3D Studio VIZ or MAX or Inventor?
Tip 1215:	Does 3D Studio VIZ, MAX and LightScape make use of a second processor in my PC?
Tip 991:	Will Inventor run faster on a multiprocessor PC?
Tip 774:	AutoCAD crashes on a 2-processor PC.

Selected tip: Easter Egg hidden in AutoCAD 2008.

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