[Users] CarpetX Meeting Minutes (02-13-2025)

[Liwei Ji]

Hi all,

Here are the minutes from today’s CarpetX Call:

Present: Liwei, Roland, Steve, Lucas, Cheng-Hsin, Yosef, Allen, Helvi, Swapnil, Zach, Erik

Liwei
Optimized the subcycling implementation in CarpetX, acchieving better performance compared to Carpet

Roland
Working on adding a Z4c test

Lucas
Tuning the parameter within the hybrid RK integrator to achieve larger CFL factors (7x faster already compared to the traditional RK method)
Trying to evolve BBH simulations on Multipatch grids using CanudaX
PR on NewRadX is almost ready

Cheng-Hsin
Successfully compiled CanudaX on Bridges-2, which features V100 GPUs. Next steps include testing and profiling its performance
Based on the tests on Delta, CanudaX is slightly faster then Z4c, but still comparable (~1.5 M/h on 1 GPU node, with qc0).

Jay
Installing Fuka on Frontier to test the optimized subcycling implementation with BNS simulations

Swapnil
A colleague is interested in porting their nucleosynthesis code to CarpetX

Zach
BHaHAHA is working with ETK, doing some final performance and accuracy tests

Steve
Progress on generating BSSN with NRPy+ for CarpetX

Erik
Investigating an issue where the compiler struggles with accessing grid functions using foo(p.I), particularly when an object file is provided.

Regards,
Liwei
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