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Hi, We have been working with OpenFOAM (an open-source CFD software) which can transfer its matrices to PETSc to use its linear solvers. This has been tested and is working well on OCLF's Frontier machine. Next we are trying to use the Kokkos
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Hi,</div>
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We have been working with OpenFOAM (an open-source CFD software) which can transfer its matrices to PETSc to use its linear solvers. This has been tested and is working well on OCLF's Frontier machine. Next we are trying to use the Kokkos backend to run it
on Frontier GPUs. While the OpenFOAM+PETSc+Kokkos environment built correctly on Frontier using the modules sourced (attached file
<i>bash_petsc4foam_gpu</i>) and configuring PETSc correctly (attached file <i>config_gpu</i>), the GPU solve seems to take more time than the CPU solve.</div>
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The PETSc run-time options we are using are attached to this email (file <i>fvSolution_petsc_pKok_Uof</i>). Could you please take a look and let us know if this combination of options is fine? In this approach we are trying to solve the pressure equation only
on the GPUs.</div>
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Thanks,</div>
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Arpan</div>
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<span style="background-color: rgb(255, 255, 255);"><b>Arpan Sircar</b></span></div>
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<span style="background-color: rgb(255, 255, 255);">R&D Associate Staff</span></div>
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<span style="background-color: rgb(255, 255, 255);">Thermal Hydraulics Group</span></div>
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Nuclear Energy and Fuel Cycle Division</div>
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<b>Oak Ridge National Laboratory</b></div>
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