eppy will be able to run energyplus on multiple cores. It is not well documented in the user documentation - see https://eppy.readthedocs.io/en/latest/runningeplus.html#running-in-parallel-processes.

You may be able to figure it out from the code and the unit tests

• code is here - https://github.com/santoshphilip/eppy/blob/55410ff7c11722f35bc4331ff5e00a0b86f787e1/eppy/runner/run_functions.py#L141
• unit tests are here:
  • https://github.com/santoshphilip/eppy/blob/55410ff7c11722f35bc4331ff5e00a0b86f787e1/eppy/tests/test_runner.py#L547
  • https://github.com/santoshphilip/eppy/blob/55410ff7c11722f35bc4331ff5e00a0b86f787e1/eppy/tests/test_runner.py#L571

We would be mighty obliged if you can help improve the documentation.