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+PROCESSOR_AFFINITY
+------------------
+
+Set to a true value to ask CTest to launch the test process with CPU affinity
+for a fixed set of processors. If enabled and supported for the current
+platform, CTest will choose a set of processors to place in the CPU affinity
+mask when launching the test process. The number of processors in the set is
+determined by the :prop_test:`PROCESSORS` test property or the number of
+processors available to CTest, whichever is smaller. The set of processors
+chosen will be disjoint from the processors assigned to other concurrently
+running tests that also have the ``PROCESSOR_AFFINITY`` property enabled.