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<p class="MsoNormal">Hi everyone,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I have been using ADOL-C for the past months and I obtain expected jacobian results, validated by finite difference.
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I am looking to improve the computational cost of the method. I had posted a question a few weeks ago regarding outputs from my profiler, but unfortunately I did not get any answer
<span style="font-family:Wingdings">L</span>. I will try to ask it again, but in more general terms:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]>Generally speaking, what are the determining factors that influence the computational cost? (Number of independent variables, number of active variables, memory allocation, etc.)<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]>Is it faster if I pre-allocate the sparsed storage (rows, cols and values) to a known maximum number of non-zeros elements?<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]>I use the driver sparse_jac but my sparsity structure remains more or less the same for the bulk of my domain. Should I rather generate the jacobian pattern (jac_pat), followed by the seed matrix (generate_seed_jac) and then the
call to either forward or reverse? Is there any gain here? In other words, is the computation of the jacobian pattern a big part of the computational cost?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Any comment on improving my code performance is welcome!<o:p></o:p></p>
<p class="MsoNormal">Thank you for your time and efforts,<o:p></o:p></p>
<p class="MsoNormal">Antoine<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#7F7F7F">Antoine DeBlois</span></b><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#7F7F7F"><br>
Specialiste ingenierie, MDO lead / Engineering Specialist, MDO lead<br>
Aéronautique / Aerospace</span><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#131E29"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#7F7F7F">T 514-855-5001, x 50862<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#131E29"><a href="mailto:antoine.deblois@aero.bombardier.com">antoine.deblois@aero.bombardier.com</a><br>
<br>
</span><i><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#7F7F7F">2351 Blvd Alfred-Nobel</span></i><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#7F7F7F"><br>
<i>Montreal, Qc<o:p></o:p></i></span></p>
<p class="MsoNormal"><i><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#7F7F7F">H4S 1A9</span></i><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#7F7F7F"><br>
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