Set to specify how many process slots this test requires. If not set, the default is 1 processor.

Denotes the number of processors that this test will require. This is typically used for MPI tests, and should be used in conjunction with the ctest_test() PARALLEL_LEVEL option.

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.