> MPI is not great at even high hundreds of cores I've used MPI on Titan for thousands of cores. It's essentially what MPI was invented for. I also know peop

> MPI is not great at even high hundreds of cores I've used MPI on Titan for thousands of cores. It's essentially what MPI was invented for. I also know people who perform QMC simulations using all of the cores on the machine at once using software built upon MPI.