Set to specify how many process slots this test requires.
If not set, the default is
Denotes the number of processors that this test will require. This is
typically used for MPI tests, and should be used in conjunction with
This will also be used to display a weighted test timing result in label and
subproject summaries in the command line output of
ctest(1). The wall
clock time for the test run will be multiplied by this property to give a
better idea of how much cpu resource CTest allocated for the test.
See also the
PROCESSOR_AFFINITY test property.