<div dir="ltr">On Mon, Aug 12, 2013 at 12:24 PM, Jim Fonseca <span dir="ltr"><<a href="mailto:jefonseca@gmail.com" target="_blank">jefonseca@gmail.com</a>></span> wrote:<br><div class="gmail_extra"><div class="gmail_quote">
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Hi,<div>We are curious about the mixed-precision capabilities in NEMO5. I see that there is a newish configure option to allow single precision for linear solve. Other than that, I found this old post:</div>
<div><a href="https://lists.mcs.anl.gov/mailman/htdig/petsc-users/2012-August/014842.html" target="_blank">https://lists.mcs.anl.gov/mailman/htdig/petsc-users/2012-August/014842.html</a><br></div><div><br></div><div>Is there any other information about to see if we can take advantage of this capability?</div>
</div></blockquote><div><br></div><div>Mixed-precision is hard, and especially hard in PETSc because the C type system is limited.</div><div>However, it also needs to be embedded in an algorithm that can take advantage of it. I would</div>
<div>always start out with a clear motivation:</div><div><br></div><div> - What would mixed precision accomplish in your code?</div><div><br></div><div> - What is the most possible benefit you would see?</div><div><br></div>
<div>and decide if that is worth a large time investment.</div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div>Thanks,</div><div>Jim</div>
<span class="HOEnZb"><font color="#888888"><div><div><br></div>-- <br>Jim Fonseca, PhD<div>Research Scientist</div><div>Network for Computational Nanotechnology</div><div>Purdue University</div><div><a href="tel:765-496-6495" value="+17654966495" target="_blank">765-496-6495</a><br>
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<a href="http://www.jimfonseca.com" target="_blank">www.jimfonseca.com</a></div><div><br><div><br></div></div></div>
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</blockquote></div><br><br clear="all"><div><br></div>-- <br>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
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