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<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Thank you for your response.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">It tried running ksp/ex2.c using<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="p1"><span class="s1"><span style="font-size:10.0pt">./ex2</span></span><span class="apple-converted-space"><span style="font-size:10.0pt"> </span></span><span class="s1"><span style="font-size:10.0pt">-m 9 -n 9 –vec_type cuda -mat_type aijcusparse</span></span><span class="apple-converted-space"><span style="font-size:10.0pt"> </span></span><span class="s1"><span style="font-size:10.0pt">-ksp_type
cg</span></span><span class="apple-converted-space"><span style="font-size:10.0pt"> </span></span><span class="s1"><span style="font-size:10.0pt">-pc_type jacobi -log_view<o:p></o:p></span></span></p>
<p class="p1"><span style="font-size:10.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">but the log file didn’t record any gpu flops.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Sorry, my next question doesn’t belong to this thread.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Does </span>DMDA only work on structured grid/mesh and not on unstructured grid/mesh?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Best,<o:p></o:p></p>
<p class="MsoNormal">Karthik.<span style="mso-fareast-language:EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:12.0pt;color:black">From: </span></b><span style="font-size:12.0pt;color:black">Junchao Zhang <junchao.zhang@gmail.com><br>
<b>Date: </b>Wednesday, 27 October 2021 at 21:13<br>
<b>To: </b>"Chockalingam, Karthikeyan (STFC,DL,HC)" <karthikeyan.chockalingam@stfc.ac.uk><br>
<b>Cc: </b>"petsc-users@mcs.anl.gov" <petsc-users@mcs.anl.gov><br>
<b>Subject: </b>Re: [petsc-users] Cuda: Vec and Mat types<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><o:p> </o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">On Wed, Oct 27, 2021 at 2:24 PM Karthikeyan Chockalingam - STFC UKRI <<a href="mailto:karthikeyan.chockalingam@stfc.ac.uk">karthikeyan.chockalingam@stfc.ac.uk</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Hello,<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">I hope, I am framing the question currently.
<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Are only distributed arrays (DMDA) of -vec_type and -mat_type only supported by CUDA?<o:p></o:p></p>
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<p class="MsoNormal">I don't understand this question. Currently, CUDA-capable types include VECCUDA, MATAIJCUDA and MATDENSECUDA, either sequential or MPI. <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">I am reading the petsc user manual in section 2.4 distributed arrays are introduced but at the start of chapter two there are other vector and matrix types as well. I wonder if
these types (I don’t how they are referred by) are also CUDA supported?<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Can you please point me to some tutorial examples in KSP and SNES that can run on gpus?<o:p></o:p></p>
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<p class="MsoNormal">search "-mat_type aijcusparse" or "-dm_mat_type aijcusparse" in petsc tests/tutorials, you will find many.<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">At the moment I am testing KSP/ex45.c with different preconditioners on cpus and gpus.<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">I tried to run KSP/ex2.c with -vec_type cuda and -mat_type aijcuda noticed there was no gpu flops recorded in my log file.<o:p></o:p></p>
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<p class="MsoNormal">It is -mat_type aijcusparse<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Many thanks,<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Karthik.<o:p></o:p></p>
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