<div dir="ltr"><div dir="ltr">On Mon, Oct 21, 2019 at 7:27 PM Xiangdong 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 dir="ltr">Hello everyone,<div><br></div><div>When I use matsetvalueslocal to form the matrix in aijcusparse format, I found that it takes forever to finish the loops of matsetvalueslocal. I am setting one entry a time, and there are about about 28 Million nonzeros. (It is fast if the matrix is aij, instead of aijcusparse).</div><div><br></div><div>However, if I have the matrix ready in binary format and use matload to get it into aijcusparse format, it is fast.</div><div><br></div><div>Is it the issue of matsetvalueslocal or my wrong way of using matsetvalueslocal? any suggestions to speed up the process?</div></div></blockquote><div><br></div><div>Is the matrix preallocated properly? You should be able to check with -info.</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 dir="ltr"><div>Thank you.</div><div><br></div><div>Xiangdong</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>