<div dir="ltr"><div dir="ltr"><div dir="ltr">On Fri, Mar 15, 2019 at 5:30 PM Yuyun Yang via petsc-users <<a href="mailto:petsc-users@mcs.anl.gov">petsc-users@mcs.anl.gov</a>> wrote:<br></div><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div lang="EN-US">
<div class="gmail-m_3638376659379130268WordSection1">
<p class="MsoNormal">Hello team,<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">Our group is thinking of using GPUs for the linear solves in our code, which is written in PETSc. I was reading the 2013 book chapter on implementation of PETSc using GPUs but wonder if there is any more updated reference that I check out?
I also saw one example cuda code online (using thrust), but would like to check with you if there is a more complete documentation of how the GPU implementation is done?</p></div></div></blockquote><div><br></div><div>Have you seen this page? <a href="https://www.mcs.anl.gov/petsc/features/gpus.html">https://www.mcs.anl.gov/petsc/features/gpus.html</a></div><div><br></div><div>Also, before using GPUs, I would take some time to understand what you think the possible benefit can be.</div><div>For example, there is almost no benefit is you use BLAS1, and you would have a huge maintenance burden</div><div>with a different toolchain. This is also largely true for SpMV, since the bandwidth difference between CPUs</div><div>and GPUs is now not much. So you really should have some kind of flop intensive (BLAS3-like) work in there</div><div>somewhere or its hard to see your motivation.</div><div><br></div><div> Thanks,</div><div><br></div><div> Matt</div><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div lang="EN-US"><div class="gmail-m_3638376659379130268WordSection1"><p class="MsoNormal"> </p><p class="MsoNormal"><u></u></p>
<p class="MsoNormal">Thanks very much!<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">Best regards,<u></u><u></u></p>
<p class="MsoNormal">Yuyun<u></u><u></u></p>
</div>
</div>
</blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr" class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div>What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead.<br>-- Norbert Wiener</div><div><br></div><div><a href="http://www.cse.buffalo.edu/~knepley/" target="_blank">https://www.cse.buffalo.edu/~knepley/</a><br></div></div></div></div></div></div></div></div></div>