Print out the amount of GPU memory used at the end of each time step #322
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Added a call to that function to the end of the main loop
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Summary
When
CPU_TIMEis enabled Cholla now prints out how much GPU memory is allocated at the end of each time step. To do this I added new functions,Reduce_size_t_MaxanPrint_GPU_Memory_Usage, to determine the maximum amount of memory used on any GPU and print that information out. The motivation was to determine how many cells we can fit on a given GPU with a given Cholla configuration easily. Early tests show that on Frontier we can fit about 457^3 cells per GPU in an MHD only build.