<html><head><style>p{margin-top:0px;margin-bottom:0px;}</style></head><body><div style="font-size:10pt; font-family:Gulim, sans-serif;"><p><span style="color: rgb(34, 34, 34); font-family: Arial, Helvetica, sans-serif; font-size: small; background-color: rgb(255, 255, 255);">Dear Zhengzhi and David </span> </p><p><span style="color: rgb(34, 34, 34); font-family: Arial, Helvetica, sans-serif; font-size: small; background-color: rgb(255, 255, 255);"> </span></p><div style="color: rgb(34, 34, 34); font-family: Arial, Helvetica, sans-serif; font-size: small; background-color: rgb(255, 255, 255);">As David mentioned, GPU is NO longer maintained after GATE version 7.</div><div style="color: rgb(34, 34, 34); font-family: Arial, Helvetica, sans-serif; font-size: small; background-color: rgb(255, 255, 255);">It would be better to optimize your GATE simulation conditions (physics cut) or use job splitter to reduce the simulation time.</div><div style="color: rgb(34, 34, 34); font-family: Arial, Helvetica, sans-serif; font-size: small; background-color: rgb(255, 255, 255);"><br></div><div style="color: rgb(34, 34, 34); font-family: Arial, Helvetica, sans-serif; font-size: small; background-color: rgb(255, 255, 255);">But if you REALLY want to run GATE simulations with <b>GPU</b>, you can use the <b>following example macro files</b> (PET, CT, and Optical) in <b>GATEv7.1</b>.</div><div style="background-color: rgb(255, 255, 255);"><font color="#222222" face="Arial, Helvetica, sans-serif" size="2"><a href="https://drive.google.com/file/d/1dl5ltfqzbAI1tsMwGF6N-UWYdhP-GFAR/view?usp=sharing">https://drive.google.com/file/d/1dl5ltfqzbAI1tsMwGF6N-UWYdhP-GFAR/view?usp=sharing</a></font><br></div><div style="background-color: rgb(255, 255, 255);"><font color="#222222" face="Arial, Helvetica, sans-serif" size="2"><br></font></div><div style="color: rgb(34, 34, 34); font-family: Arial, Helvetica, sans-serif; font-size: small; background-color: rgb(255, 255, 255);">The simulation time could be shortened about 4 times with GPU in comparison with CPU.(slide#7)</div><div style="color: rgb(34, 34, 34); font-family: Arial, Helvetica, sans-serif; font-size: small; background-color: rgb(255, 255, 255);"><br></div><div style="color: rgb(34, 34, 34); font-family: Arial, Helvetica, sans-serif; font-size: small; background-color: rgb(255, 255, 255);">Here is the list of software for the GATEv7.1 simulation with GPU (5 years ago)</div><div style="color: rgb(34, 34, 34); font-family: Arial, Helvetica, sans-serif; font-size: small; background-color: rgb(255, 255, 255);">==============================<wbr>===========================</div><div style="color: rgb(34, 34, 34); font-family: Arial, Helvetica, sans-serif; font-size: small; background-color: rgb(255, 255, 255);">-Ubuntu 14.04.1 LTS<br>-CLHEP 2.2.0.4<br>-cmake-2.8.10.2<br>-CUDA-v7.0<br>-root_v5.34.30<br>-Geant4.10.01.p02<br>-GATEv7.1 <br></div><div style="color: rgb(34, 34, 34); font-family: Arial, Helvetica, sans-serif; font-size: small; background-color: rgb(255, 255, 255);">==============================<wbr>===========================</div><div style="color: rgb(34, 34, 34); font-family: Arial, Helvetica, sans-serif; font-size: small; background-color: rgb(255, 255, 255);"><br></div><div style="color: rgb(34, 34, 34); font-family: Arial, Helvetica, sans-serif; font-size: small; background-color: rgb(255, 255, 255);">Again, GPU is NOT maintained in GATE anymore.</div><div style="color: rgb(34, 34, 34); font-family: Arial, Helvetica, sans-serif; font-size: small; background-color: rgb(255, 255, 255);"><br></div><div style="color: rgb(34, 34, 34); font-family: Arial, Helvetica, sans-serif; font-size: small; background-color: rgb(255, 255, 255);">Good luck for your works~!</div><div style="color: rgb(34, 34, 34); font-family: Arial, Helvetica, sans-serif; font-size: small; background-color: rgb(255, 255, 255);"><br></div><div style="color: rgb(34, 34, 34); font-family: Arial, Helvetica, sans-serif; font-size: small; background-color: rgb(255, 255, 255);">Best regards,</div><div style="color: rgb(34, 34, 34); font-family: Arial, Helvetica, sans-serif; font-size: small; background-color: rgb(255, 255, 255);"><br></div><div style="color: rgb(34, 34, 34); font-family: Arial, Helvetica, sans-serif; font-size: small; background-color: rgb(255, 255, 255);">Han Gyu</div>--------Han Gyu Kang, Ph.D, Researcher<br><br>National Institute of Radiological Sciences (NIRS)<br>National Institutes for Quantum and Radiological Science and Technology (QST)<br> 4-9-1 Anagawa, Inage-ku, Chiba 263-8555, JAPAN<p> </p><p style="font-size:10pt;font-family:sans-serif;padding:0 0 0 10pt"><span>-----Original Message-----</span><br><b>From:</b> "David Sarrut"<David.Sarrut@creatis.insa-lyon.fr> <br><b>To:</b> "Albert Grace Lieu"<albertnew2018@gmail.com>; <br><b>Cc:</b> "gate-users"<gate-users@lists.opengatecollaboration.org>; "Peter Olcott"<polcott@reflexion.com>; <br><b>Sent:</b> 2020-11-17 (화) 15:50:40 (GMT+09:00)<br><b>Subject:</b> Re: [Gate-users] Running GATE on GPU<br> </p><div dir="ltr">Hello Zhengzhi, <div> </div><div>yes sorry, GPU part is no more maintained. It still is viewable in the history of git to keep the memory, but probably difficult to make it work. </div><div> </div><div>The current best way to speed up simulation is </div><div>1) to optimize your physics (cut), geometry (less voxels), etc</div><div>2) to run several Gate in parallel, via several jobs (with 56 cores, this is nice!), providing that you use 'auto' as the random seed to avoid reproducing the exact same simulation. You will have to merge results at the end. </div><div> </div><div>Sincerely, </div><div>David </div></div><br><div><div dir="ltr">On Tue, Nov 17, 2020 at 1:28 AM Albert Grace Lieu <<a href="mailto:albertnew2018@gmail.com" rel="noreferrer noopener" target="_blank">albertnew2018@gmail.com</a>> wrote: </div><blockquote style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">Dear Gate users, <br><div> </div><div>First thing first, can we still possibly use the GATE GPU version? I am trying to run a GATE simulation on GPU (GATE V8.2, CUDA-10.1), but end up with a similar problem reported <a href="https://github.com/OpenGATE/Gate/issues/188" target="_blank" rel="noreferrer noopener">[1]</a> by Thomas Funck. In the post, David Sarrut said "Hello, sorry the GPU part is no more maintained ...". Although it might not be maintained anymore (which is really unfortunate), can one still use, say with the old GATE version? Without CUDA acceleration, GATE running with 56 cores is still painfully slow. Please give me any help.</div><div> </div><div>Thanks a lot,</div><div>Sincerely</div><div> </div><div>Zhengzhi</div><div> </div><div>[1] <a href="https://github.com/OpenGATE/Gate/issues/188" target="_blank" rel="noreferrer noopener">https://github.com/OpenGATE/Gate/issues/188</a></div><div> </div></div><br><div><div dir="ltr">On Fri, Nov 13, 2020 at 2:39 PM Albert Grace Lieu <<a href="mailto:albertnew2018@gmail.com" target="_blank" rel="noreferrer noopener">albertnew2018@gmail.com</a>> wrote: </div><blockquote style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">Dear Gate users, <div> </div><div>In the <a href="https://opengate.readthedocs.io/en/latest/how_to_use_gate_on_a_gpu.html" target="_blank" rel="noreferrer noopener">user manual</a>, it says "<b> Examples are provided within the GATE source package and users can find a complete example about How To define and run a complete PET simulation set-up by using a GPU architecture</b>.", does anyone know where the example is? (I did not find it)</div><div> </div><div>I try to run GATE simulation on GPU but could not find enough information about how to do so. The only pieces of information about running GATE on GPU that I can find are [<a href="http://www.opengatecollaboration.org/sites/default/files/Talk6.pdf" target="_blank" rel="noreferrer noopener">1</a>, <a href="https://github.com/OpenGATE/GateContrib/tree/master/imaging/SPECT_GPU" target="_blank" rel="noreferrer noopener">2</a>] and the<a href="https://opengate.readthedocs.io/en/latest/how_to_use_gate_on_a_gpu.html" target="_blank" rel="noreferrer noopener"> user manual</a>. None of them seem to give me an entire picture of running GATE PET simulation on GATE. I am using GATE V8.2 with GATE_USE_GPU enabled along with the Nvidia toolkit 10.1. </div><div> </div><div>I deeply appreciate any suggestions and help.</div><div>Sincerely,</div><div> </div><div>Zhengzhi</div><div> </div><div> </div></div>
</blockquote></div>
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