[Ipopt] Ipopt Digest, Vol 145, Issue 6

Thu Jan 19 01:57:36 EST 2017

Perhaps you can try to set the IPOPT option 'print_timing_statistics' =
'yes': https://www.coin-or.org/Ipopt/documentation/node41.html

On Wed, Jan 18, 2017 at 10:00 AM, <ipopt-request at coin-or.org> wrote:

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> Today's Topics:
>
>    1. WSMP for IPOPT (Stuart Rogers)
>    2. Getting Accurate CPU Times from Ipopt (Anil Rao)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Tue, 17 Jan 2017 13:37:39 -0700
> From: Stuart Rogers <smr1 at ualberta.ca>
> To: ipopt at list.coin-or.org
> Subject: [Ipopt] WSMP for IPOPT
> Message-ID:
>         <CAHBg-_oNP4X5vCtig7RcrZuys=NG2cXg6vZK2Pkeyi4q=uEm0w at mail.
> gmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> I have a few questions regarding WSMP and how it is used by IPOPT.
>
> * The WSMP webpage (https://urldefense.proofpoint.com/v2/url?u=http-
> 3A__researcher.watson.ibm&d=CwICAg&c=Ngd-ta5yRYsqeUsEDgxhcqsYYY1Xs5ogLx
> WPA_2Wlc4&r=BAP9D2FFNY-E7nYzFI5fHw&m=sdB5SWDdjesA3HFY6oMVN57SUQ3e1b
> D-NFPtNrbSvys&s=Iz9GXtbtQBWDczHVOY8Aabhixqy90l_2D6hyVtuUesQ&e= .
> com/researcher/view_group.php?id=1426) says that version 15 includes
> GPU-accelerated libraries. Which WSMP solvers (i.e. symmetric direct,
> general direct, or iterative solvers) have been implemented to run on the
> GPUs? Was the GPU acceleration of WSMP implemented in CUDA or OpenCL? Are
> there any benchmark results showing a marked speed-up of IPOPT when using
> the GPU-accelerated version of WSMP?
>
> * The WSMP webpage seems to only offer downloads of WSMP. Is PWSMP included
> in these downloads? Is IPOPT able to utilize the PWSMP linear solver? If
> so, are there any benchmark results showing a marked speed-up of IPOPT when
> using PWSMP rather than WSMP?
>
> * The default value in IPOPT for the wsmp_num_threads option is 1:
> https://urldefense.proofpoint.com/v2/url?u=https-3A__www.
> coin-2Dor.org_Ipopt_documentation_node62.html&d=CwICAg&c=Ngd-
> ta5yRYsqeUsEDgxhcqsYYY1Xs5ogLxWPA_2Wlc4&r=BAP9D2FFNY-E7nYzFI5fHw&m=
> sdB5SWDdjesA3HFY6oMVN57SUQ3e1bD-NFPtNrbSvys&s=OzkYEyXCFXY-2nquX-
> ehE6Qitij6QQqxSWfwhmuJGig&e= . This option
> determines the number of threads to be used by WSMP. In the case when the
> user doesn't set this option, why doesn't IPOPT or WSMP internally set this
> option to the number of physical cores detected rather than defaulting to
> 1?
>
> * wsmp_iterative is an IPOPT option that uses the iterative rather than
> symmetric direct WSMP solver:
> https://urldefense.proofpoint.com/v2/url?u=https-3A__www.
> coin-2Dor.org_Bonmin_option-5Fpages_options-5Flist-
> 5Fipopt.html&d=CwICAg&c=Ngd-ta5yRYsqeUsEDgxhcqsYYY1Xs5ogLx
> WPA_2Wlc4&r=BAP9D2FFNY-E7nYzFI5fHw&m=sdB5SWDdjesA3HFY6oMVN57SUQ3e1b
> D-NFPtNrbSvys&s=GlF-iE9dbvi-t1mjuWs24cuv0aFUe_AXDb2PVDJmoeA&e= . Are
> there any benchmark results showing a marked speed-up of IPOPT when using
> this iterative WSMP option?
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> ------------------------------
>
> Message: 2
> Date: Tue, 17 Jan 2017 15:41:19 -0500
> From: Anil Rao <anilvrao at gmail.com>
> To: ipopt at list.coin-or.org
> Subject: [Ipopt] Getting Accurate CPU Times from Ipopt
> Message-ID: <8284AB55-1A48-42F5-B636-B2D63F3C1D1C at gmail.com>
> Content-Type: text/plain; charset="us-ascii"
>
> I would like to know how to get the most accurate CPU time from Ipopt.  I
> am running a large set of jobs and I need the CPU time from each job. I am
> using the MATLAB mex files compiled by Enrico Bertolazzi for my runs.  I am
> finding that Ipopt does not seem to provide accurate CPU times using the
> CPU time output from the mex interface.  I am grateful if somebody might be
> able to help me get an accurate execution time.  Thanks for your help.
>
> Regards,
>
> Anil
>
> Sent from my iPhone.  Please excuse any typos.
>
> Anil V. Rao, PhD
> Gainesville, FL 32607
> Tel: 352-672-1529 (cell)
> Email:  anilvrao at gmail.com
> Website:  https://urldefense.proofpoint.com/v2/url?u=http-3A__www.
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> ------------------------------
>
> End of Ipopt Digest, Vol 145, Issue 6
> *************************************
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