Sub-grid bubble GPU slowdown? - Githubissues

MFlowCode / MFC

Exascale simulation of multiphase/physics fluid dynamics

https://mflowcode.github.io

MIT License

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Sub-grid bubble GPU slowdown? #390

Closed sbryngelson closed 5 months ago

sbryngelson commented 5 months ago

The PR here https://github.com/MFlowCode/MFC/pull/285 shows the following result for this benchmark case on Phoenix GPU: viscous_weno5_sgb_mono 1.00x 0.45x 1.33x indicating that the code in this PR is about twice as fast as the current master branch for this case.

Link to Benchmark CI run: https://github.com/MFlowCode/MFC/actions/runs/8585260629/job/23579443541?pr=285
Link to the actual test case: https://github.com/MFlowCode/MFC/blob/master/benchmarks/viscous_weno5_sgb_mono/case.py

Notably, this case is not faster on CPUs. What's going on, here?

sbryngelson commented 5 months ago

close as this was entirely misinterpreted