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AMReX-Combustion / PeleLMeX

An adaptive mesh hydrodynamics simulation code for low Mach number reacting flows without level sub-cycling.
https://amrex-combustion.github.io/PeleLMeX/
BSD 3-Clause "New" or "Revised" License
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peleLM.isothermal_EB = 1 causes CUDA error 700 - illegal memory access was encountered !!! #237

Closed taaresh1 closed 10 months ago

taaresh1 commented 10 months ago

Hello, I am able to run a low Mach case with a fairly complex geometry with EB on CPUs. However, the same setup doesn't run on GPUs. It complains of illegal memory access. My case has isothermal walls. After ruling out all possibilities, I have narrowed down the issue: switching the flag to peleLM.isothermal_EB = 0 runs seamlessly, but setting it to 1 results in the above mentioned error.

The Backtrace file points to PeleLMUtils.cpp (line 333 - function - intFluxDivergenceLevelEB) where this issue may have arisen first.

Is there a fix for this? Looking forward to some help on this.

Thanks!

Taaresh

baperry2 commented 10 months ago

Ok, I was able to reproduce with the EB_BackwardStepFlame in 2D running on Eagle GPUs. Definitely a bug, will have to investigate

taaresh1 commented 10 months ago

Thanks for looking into it, Bruce! Looking forward to the fix.