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<p class="MsoNormal"><span style="color:#1F497D">Dear all,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">I did more testing on the problem I described earlier. I made a minimum working example (see attachment), that causes the error.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">sparse_hess(…) crashes, when you perform operations on adoubles in the traced function which are not marked as independents.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">sparse_jac(…) does not show this behavior.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Kind regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">David<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal" style="punctuation-wrap:simple;text-autospace:none"><span lang="DE" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:dimgray">——————————————————————————<o:p></o:p></span></p>
<p class="MsoNormal" style="punctuation-wrap:simple;text-autospace:none"><span lang="DE" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:dimgray"><o:p> </o:p></span></p>
<p class="MsoNormal" style="punctuation-wrap:simple;text-autospace:none"><b><span lang="DE" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:dimgray">Dipl. Inform. David Seelbinder</span></b><span lang="DE" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:dimgray"><o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:16.0pt;punctuation-wrap:simple;text-autospace:none">
<a name="Telefon"></a><span lang="DE" style="font-size:8.5pt;font-family:"Arial","sans-serif";color:dimgray">Phone +49 421 24420-1283 |
<a href="mailto:david.seelbinder@dlr.de">david.seelbinder@dlr.de</a><o:p></o:p></span></p>
<p class="MsoNormal" style="punctuation-wrap:simple;text-autospace:none"><b><span lang="DE" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:dimgray"><o:p> </o:p></span></b></p>
<p class="MsoNormal" style="punctuation-wrap:simple;text-autospace:none"><b><span lang="DE" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:dimgray">Deutsches Zentrum für Luft- und Raumfahrt</span></b><span lang="DE" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:dimgray">
e.V. (DLR)<o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:16.0pt;punctuation-wrap:simple;text-autospace:none">
<a name="Institut"></a><span style="font-size:8.5pt;font-family:"Arial","sans-serif";color:dimgray">Institute of Space Systems| GNC Systems (RY-GNC) | Robert-Hooke-Str.
</span><span lang="DE" style="font-size:8.5pt;font-family:"Arial","sans-serif";color:dimgray">7 | 28359 Bremen |
<a href="http://www.dlr.de/">www.DLR.de</a></span><u><span lang="DE" style="font-size:8.5pt;font-family:"Arial","sans-serif";color:blue"><o:p></o:p></span></u></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><b><span lang="DE" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">Von:</span></b><span lang="DE" style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> adol-c-bounces@list.coin-or.org [mailto:adol-c-bounces@list.coin-or.org]
<b>Im Auftrag von </b>David.Seelbinder@dlr.de<br>
<b>Gesendet:</b> Montag, 12. Mai 2014 22:04<br>
<b>An:</b> adol-c@list.coin-or.org<br>
<b>Betreff:</b> [ADOL-C] Operations on passive adoubles? Nonsequential active adouble memory?<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Dear all,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I have recently started to work with ADOL-C and I came across some unexpected behavior. Now I am wondering if I am doing something that is not allowed. I tried to reduce my problem to minimal size and describe it below. I would much appreciate
any hints!<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b>Problem setup: <o:p></o:p></b></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I want to compute the sparse_hess(…) of a function <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas">adouble Func(<span style="color:blue">const</span> vector<vector<adouble>& myContainer,
<span style="color:blue">double</span>* otherArg)<o:p></o:p></span></p>
<p class="MsoNormal"><i><o:p> </o:p></i></p>
<p class="MsoNormal">But I am not interested in the hessian with respect to all values in <span style="font-size:9.5pt;font-family:Consolas">myContainer</span><i>,
</i>but only some subset.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">So when I trace <span style="font-size:9.5pt;font-family:Consolas">
Func</span><i> (…)</i> I selectively set some of the adoubles active, e.g.:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas">double x[] = {1, 2, 3};<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas">trace_on(tag);<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas">myContainer[3][2] <<= x[0];<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas">myContainer[1][2] <<= x[1];<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas">myContainer[5][0] <<= x[2];<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas">adouble result = Func(myContainer, …otherArgs)<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas">double result2;<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas">result >>= result2;<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas">trace_off();<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas"><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:blue">int</span><span style="font-size:9.5pt;font-family:Consolas"> options[] = {0, 0};<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas">double* rind = NULL;<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas">double* cind = NULL;<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas">double* val = NULL;<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas">int nnz = 0;<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas">sparse_hess(tag, 3, 0, x, &nnz, &rind, &cind, &val, options);<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas"><o:p> </o:p></span></p>
<p class="MsoNormal"><b>Problem description: <o:p></o:p></b></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas"><o:p> </o:p></span></p>
<p class="MsoNormal">The problem occurs when I perform operations in Func on other adoubles than the ones I activated. E.g If Func contains<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas">adouble dummy = myContainer[0][0] * myContainer[0][0];<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">This leads to a crash in sparse_hess->hess_pat->nonl_ind_forward_safe->traverse_unary<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="text-autospace:none">Uni5_for.c line 5622<span style="font-size:9.5pt;font-family:Consolas">
<span style="color:blue">if</span> (tree->left != NULL)<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Tree->left is undefined memory, probably because already in<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas">Line 2016: traverse_unary(&fod[arg_index[arg1]], nonl_dom, &fod[arg_index[arg2]], indcheck+1,maxopind+2);<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">the index arg1 was wrong. <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">However, if I only perform operations on the activated adoubles in Func, the sparse_hess works fine!<o:p></o:p></p>
<p class="MsoNormal"><u><o:p><span style="text-decoration:none"> </span></o:p></u></p>
<p class="MsoNormal">That makes me wonder:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b>Questions:<o:p></o:p></b></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo2"><![if !supportLists]><span style="mso-list:Ignore">1.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>I am doing something wrong, when using “passive” adoubles just as normal doubles?<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo2"><![if !supportLists]><span style="mso-list:Ignore">2.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>Does ADOL-C require activated adoubles to be in sequential memory or fulfill other conditions?<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo2"><![if !supportLists]><span style="mso-list:Ignore">3.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>Can adoubles be manipulated through pointers and references the same as normal doubles? What about the “const” ness of adouble arguments?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Any hints would be very welcome!<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Kind regards,<o:p></o:p></p>
<p class="MsoNormal">David<o:p></o:p></p>
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