<div dir="ltr"><div class="gmail_default" style="font-family:'trebuchet ms',sans-serif">Seems like a worthwhile enterprise. </div><div class="gmail_default" style="font-family:'trebuchet ms',sans-serif"><br>
</div><div class="gmail_default" style="font-family:'trebuchet ms',sans-serif">Looking at the site there are a number of interesting aspects of OpenBlas that could help with ideas for the Foundation, not least of which is their balance sheet and funding model:</div>
<div class="gmail_default" style="font-family:'trebuchet ms',sans-serif"><br></div><div class="gmail_default" style><font face="trebuchet ms, sans-serif"><a href="https://docs.google.com/spreadsheet/ccc?key=0AghkTjXe2lDndE1UZml0dGpaUzJmZGhvenBZd1F2R1E&usp=sharing#gid=0">https://docs.google.com/spreadsheet/ccc?key=0AghkTjXe2lDndE1UZml0dGpaUzJmZGhvenBZd1F2R1E&usp=sharing#gid=0</a></font><br>
</div><div class="gmail_default" style><font face="trebuchet ms, sans-serif"><br></font></div><div class="gmail_default" style><font face="trebuchet ms, sans-serif">also hadn't heard of:</font></div><div class="gmail_default" style>
<font face="trebuchet ms, sans-serif"><a href="https://www.bountysource.com/faq">https://www.bountysource.com/faq</a><br></font></div><div class="gmail_default" style><font face="trebuchet ms, sans-serif">before, looks like something of interest.</font></div>
<div class="gmail_default" style><font face="trebuchet ms, sans-serif"><br></font></div><div class="gmail_default" style><font face="trebuchet ms, sans-serif">also an aside but a useful git-branching model...: <a href="http://nvie.com/files/Git-branching-model.pdf">http://nvie.com/files/Git-branching-model.pdf</a></font></div>
<div class="gmail_default" style><font face="trebuchet ms, sans-serif"><br></font></div><div class="gmail_default" style><font face="trebuchet ms, sans-serif">so back to the question, how can we as a community help with the interface work? I suppose steps might be something like:</font></div>
<div class="gmail_default" style><ol><li><font face="trebuchet ms, sans-serif">pick some example function sets</font></li><li><font face="trebuchet ms, sans-serif">map the variable types appropriately (so they will work with ADMB</font></li>
<li><font face="trebuchet ms, sans-serif">write adjoint code for dvar functions </font><span style="font-family:'trebuchet ms',sans-serif">(?) </span></li><li><font face="trebuchet ms, sans-serif">test against current ADMB implmentations</font></li>
<li><font face="trebuchet ms, sans-serif">...</font></li></ol><div><font face="trebuchet ms, sans-serif">thanks for the interest dave.</font></div><div><font face="trebuchet ms, sans-serif"><br></font></div><div><font face="trebuchet ms, sans-serif">jim</font></div>
</div><div class="gmail_default" style><font face="trebuchet ms, sans-serif"><br></font></div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Mon, Aug 4, 2014 at 12:31 PM, dave fournier <span dir="ltr"><<a href="mailto:davef@otter-rsch.com" target="_blank">davef@otter-rsch.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">I wonder if there is any interest in doing a bit of work to interface some of the common<br>
function like ludecomp and choleski decomp with the openblas versions.<br>
<br>
this is not too difficult once one figures out the boring stuff like the fact that matrices are strored<br>
by column in contiguous arrays.<br>
<br>
we are now looking at ever larger problems. I compared the admb lu decomp of a 2,000x2,000 matrix<br>
from numerical recipes with the openblas version.<br>
<br>
Time for openblas lu decomp 172.05 ms<br>
Time for numerical recipes lu decomp 22102.9 ms<br>
<br>
which is about 125 times faster<br>
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</blockquote></div><br><br clear="all"><div><br></div>-- <br><div dir="ltr"><p><font face="trebuchet ms, sans-serif"><a name="SafeHtmlFilter_SafeHtmlFilter_SafeHtmlFilter_SafeHtmlFilter_SafeHtmlFilter_SafeHtmlFilter__MailAutoSig">James
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