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Hi Junchao and Barry, I tried adding -log_view to my OpenFOAM command since that is what I am running the entire package through. However, it does not recognize that as a valid option. I am not sure where to put that tag in this setup. I am
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Hi Junchao and Barry,</div>
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I tried adding -log_view to my OpenFOAM command since that is what I am running the entire package through. However, it does not recognize that as a valid option. I am not sure where to put that tag in this setup.</div>
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I am however using a Kokkos profiling tool, the output of which (for the GPU run) is attached with this email. Do let me know if this is useful or if you have ideas of where to put the -log_view tag.</div>
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<br>
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Junchao - Great nice running into you here.</div>
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Thanks,</div>
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Arpan</div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Junchao Zhang <junchao.zhang@gmail.com><br>
<b>Sent:</b> Friday, June 14, 2024 3:16 PM<br>
<b>To:</b> Sircar, Arpan <sircara@ornl.gov><br>
<b>Cc:</b> Barry Smith <bsmith@petsc.dev>; petsc-users@mcs.anl.gov <petsc-users@mcs.anl.gov>; Gottiparthi, Kalyan <gottiparthik@ornl.gov><br>
<b>Subject:</b> Re: [petsc-users] [EXTERNAL] Re: Running PETSc with a Kokkos backend on OLCF Frontier</font>
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<div dir="ltr">Arpan,
<div> Did you add -log_view ?</div>
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<div dir="ltr">--Junchao Zhang</div>
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<div dir="ltr" class="x_gmail_attr">On Fri, Jun 14, 2024 at 2:00 PM Sircar, Arpan via petsc-users <<a href="mailto:petsc-users@mcs.anl.gov">petsc-users@mcs.anl.gov</a>> wrote:<br>
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Hi Barry, Thanks for your prompt response. These are run with with the same PETSc solvers but the one on GPUs (log_pKok) uses mataijkokkos while the other one does not. Please let me know if you need any other information. Thanks, Arpan From:
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Hi Barry,</div>
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Thanks for your prompt response. These are run with with the same PETSc solvers but the one on GPUs (log_pKok) uses mataijkokkos while the other one does not.</div>
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Please let me know if you need any other information.</div>
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Thanks,</div>
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Arpan</div>
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<div id="x_m_8085757438764483939divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> Barry Smith <<a href="mailto:bsmith@petsc.dev" target="_blank">bsmith@petsc.dev</a>><br>
<b>Sent:</b> Friday, June 14, 2024 1:47 PM<br>
<b>To:</b> Sircar, Arpan <<a href="mailto:sircara@ornl.gov" target="_blank">sircara@ornl.gov</a>><br>
<b>Cc:</b> <a href="mailto:petsc-users@mcs.anl.gov" target="_blank">petsc-users@mcs.anl.gov</a> <<a href="mailto:petsc-users@mcs.anl.gov" target="_blank">petsc-users@mcs.anl.gov</a>>; Gottiparthi, Kalyan <<a href="mailto:gottiparthik@ornl.gov" target="_blank">gottiparthik@ornl.gov</a>><br>
<b>Subject:</b> [EXTERNAL] Re: [petsc-users] Running PETSc with a Kokkos backend on OLCF Frontier</font>
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Please run both the CPU solvers and GPU solvers cases with -log_view and send the two outputs.
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<div> Barry</div>
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<div>On Jun 14, 2024, at 1:35 PM, Sircar, Arpan via petsc-users <<a href="mailto:petsc-users@mcs.anl.gov" target="_blank">petsc-users@mcs.anl.gov</a>> wrote:</div>
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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<span> </span><i>bash_petsc4foam_gpu</i>) and configuring PETSc correctly (attached file<span> </span><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<span> </span><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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<span id="x_m_8085757438764483939x_cid:30E5FD77-BD68-4987-9F1C-4EF987DA4B33"><fvSolution_petsc_pKok_Uof></span><span id="x_m_8085757438764483939x_cid:F8894B7F-0EC7-4EB0-8607-4434E292F59C"><bash_petsc4foam_gpu></span><span id="x_m_8085757438764483939x_cid:9F0AA58D-E203-4872-8D80-814D21CBB4C1"><config_gpu></span></div>
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