On Thu, Aug 9, 2012 at 3:19 PM, Alexander Goncharov <span dir="ltr"><<a href="mailto:alexvg77@gmail.com" target="_blank">alexvg77@gmail.com</a>></span> wrote:<br><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Hello PETSC developers!<br>
<br>
I would like to ask a couple of questions about symmetric sparse matrix<br>
storage<br>
<br>
1. Is matrix frees unused preallocated nonzero space. For example, when<br>
run with option -info, it says how many nonzeros were unused. Is this<br>
unused space unallocated?<br></blockquote><div><br></div><div>Yes, during assembly.</div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
2. How PETSC stores symmetric sparse matrices on a GPU? Does it stores<br>
only half of it or not?<br></blockquote><div><br></div><div>We do not have symmetric storage on the GPU since we only have what the CUDA libraries have.</div><div><br></div><div> Matt</div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Thank you!<br>
<span class="HOEnZb"><font color="#888888"><br>
Alexander.<br>
<br>
</font></span></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<br>