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Load balancing is an evergreen topic in HPC mesh-and-particle codes like AMReX. Appropriate, fast and effective load balancing strategies are critical to ensure AMReX codes are capable of making the best use of available computational resources and maximizing the size and type of simulations that can be performed. I have begun investigating potential short and long term advancements in load balancing that may be of use to the AMReX community. In this talk, I will give an overview of the current load balancing options in AMReX plus an algorithmic investigation performed last summer by NERSC summer interns which found potential improvements in our current Knapsack and SFC algorithms. Then, I will present an overview of possible next steps, long-term advancements, and where I believe these advances would be most helpful. Hopefully, this will generate a discussion around which investigations would be most helpful to the AMReX community to determine the best targets for this summer’s interns and beyond.
