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<p class="MsoNormal"><span style="color:#1F497D">Customer is saying:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">We are performing nonlinear SNES solvers with linear KSP solves inside of them. The KSP solver types that we use are CG, CGS, BiCG, BiCGS, GMRES, Richardson, and LSQR; though Richardson and LSQR are very infrequently
used. We use a block Jacobi preconditioner with the following sub-preconditioner types: None, ILU, LU, ICC, Cholesky, and Jacobi. The global system sizes range from 10k x 10k to 20M x 20M depending on model size. We typically run the smaller models on
4-core workstations and the larger models with between 32 and 128 cores on an HPC. The workstations will only have a single GPU, but the HPC may have one GPU per 16 cores (1 GPU per HPC node).<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Antoine</span><span style="color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext"> petsc-dev-bounces@mcs.anl.gov [mailto:petsc-dev-bounces@mcs.anl.gov]
<b>On Behalf Of </b>Paul Mullowney<br>
<b>Sent:</b> Wednesday, March 13, 2013 1:43 PM<br>
<b>To:</b> For users of the development version of PETSc<br>
<b>Subject:</b> Re: [petsc-dev] PETSc port to OpenCL<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Hi Antoine,<br>
<br>
I don't think one can claim that PETSc supports OpenCL right now. However, I think progress has definitely been made in getting core vector computations (for a Krylov algorithm) to run via OpenCL.
<br>
<br>
Karl, do you have any comment on this?<br>
<br>
Once those are in place, it wouldn't be too difficult to get a prototype matrix class into PETSc where the other core pieces of a solve, mainly SpMV (and potentially the triangular solves) run on AMD devices.<br>
<br>
The real question is, what algorithms does your customer want to run? i.e. is it a KSP solve? What is the preconditioner? How big is the system? Are multiple GPUs neeeded?<br>
<br>
-Paul<br>
<br>
<br>
<br>
<br>
<o:p></o:p></p>
<p class="MsoNormal">We (AMD FirePro) have a customer using PETSc and trying to port their thermal/ablation solver code to OpenCL.
<o:p></o:p></p>
<p class="MsoNormal">Do you support AMD GPUs and OpenCL?<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Ref: <a href="http://fireuser.com/blog/comparing_the_amd_firepro_s10000_to_the_tesla_k10_k20_and_k20x">
Comparing the AMD FirePro S10000 to the Nvidia Tesla K10, K20 and K20X</a><o:p></o:p></p>
<p class="MsoNormal"><a href="http://www.amd.com/us/products/workstation/graphics/firepro-remote-graphics/S10000/Pages/S10000.aspx#1">AMD FirePro™ S10000 Server Graphics</a><o:p></o:p></p>
<p class="MsoNormal">Heterogeneous Compute - <a href="http://developer.amd.com/tools/">
Tools</a><o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Regards,<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal" style="text-autospace:none;vertical-align:middle"><b><span style="font-family:"Arial","sans-serif";color:#00A76F">Antoine Reymond</span></b><o:p></o:p></p>
<p class="MsoNormal" style="text-autospace:none;vertical-align:middle"><span style="font-size:9.0pt;font-family:"Arial","sans-serif";color:#8C8C8C">Sr. Strategic Alliances Manager</span><o:p></o:p></p>
<p class="MsoNormal" style="text-autospace:none;vertical-align:middle"><span style="font-size:9.0pt;font-family:"Arial","sans-serif";color:#8C8C8C">AMD Professional Graphics</span><o:p></o:p></p>
<p class="MsoNormal" style="text-autospace:none;vertical-align:middle"><span style="font-size:9.0pt;font-family:"Arial","sans-serif";color:#8C8C8C">O: +(1) 949 336 6244 M: +(1) 949 870 2200</span><o:p></o:p></p>
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