<html><head><meta http-equiv="Content-Type" content="text/html charset=iso-8859-1"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Dear Matt,<div><br></div><div>the output files obtained with PETSc-3.4p4 and 3.5p1 versions using the following command line:</div><div><div apple-content-edited="true">
<span class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px; "><span class="Apple-style-span" style="border-collapse: separate; orphans: 2; text-align: -webkit-auto; text-indent: 0px; widows: 2; border-spacing: 0px; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="orphans: 2; text-align: -webkit-auto; text-indent: 0px; widows: 2; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="orphans: 2; text-align: -webkit-auto; text-indent: 0px; widows: 2; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="orphans: 2; text-indent: 0px; widows: 2; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="orphans: 2; text-indent: 0px; widows: 2; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div style="color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; border-collapse: separate; border-spacing: 0px; "><span style="font-size: medium; ">-ksp_type preonly -pc_type lu -pc_factor_mat_solver_package mumps -mat_mumps_icntl_8 0 </span><span style="font-size: medium; ">-ksp_monitor -ksp_view</span></div><div style="color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; border-collapse: separate; border-spacing: 0px; "><span style="font-size: medium; "><br></span></div><div style="color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; border-collapse: separate; border-spacing: 0px; "><span style="font-size: medium; ">are attached below. If skipping flops and memory usage per core, a diff between the two output files reduces to:</span></div><div style="color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; border-collapse: separate; border-spacing: 0px; ">diff Output_3.4p4.txt Output_3.5p1.txt</div><div style="border-collapse: separate; border-spacing: 0px; "><div style="border-collapse: separate; border-spacing: 0px; ">14c14</div><div style="border-collapse: separate; border-spacing: 0px; ">< Matrix Object: 64 MPI processes</div><div style="border-collapse: separate; border-spacing: 0px; ">---</div><div style="border-collapse: separate; border-spacing: 0px; ">> Mat Object: 64 MPI processes</div><div style="border-collapse: separate; border-spacing: 0px; ">18c18</div><div style="border-collapse: separate; border-spacing: 0px; ">< total: nonzeros=481059588, allocated nonzeros=481059588</div><div style="border-collapse: separate; border-spacing: 0px; ">---</div><div style="border-collapse: separate; border-spacing: 0px; ">> total: nonzeros=4.8106e+08, allocated nonzeros=4.8106e+08</div></div><div style="border-collapse: separate; border-spacing: 0px; "><div style="border-collapse: separate; border-spacing: 0px; ">457c457</div><div style="border-collapse: separate; border-spacing: 0px; ">< INFOG(10) (total integer space store the matrix factors after factorization): 26149876 </div><div style="border-collapse: separate; border-spacing: 0px; ">---</div><div style="border-collapse: separate; border-spacing: 0px; ">> INFOG(10) (total integer space store the matrix factors after factorization): 26136333 </div><div style="border-collapse: separate; border-spacing: 0px; ">461c461</div><div style="border-collapse: separate; border-spacing: 0px; ">< INFOG(14) (number of memory compress after factorization): 54 </div><div style="border-collapse: separate; border-spacing: 0px; ">---</div><div style="border-collapse: separate; border-spacing: 0px; ">> INFOG(14) (number of memory compress after factorization): 48 </div><div style="border-collapse: separate; border-spacing: 0px; ">468,469c468,469</div><div style="border-collapse: separate; border-spacing: 0px; ">< INFOG(21) (size in MB of memory effectively used during factorization - value on the most memory consuming processor): 338 </div><div style="border-collapse: separate; border-spacing: 0px; ">< INFOG(22) (size in MB of memory effectively used during factorization - sum over all processors): 19782 </div><div style="border-collapse: separate; border-spacing: 0px; ">---</div><div style="border-collapse: separate; border-spacing: 0px; ">> INFOG(21) (size in MB of memory effectively used during factorization - value on the most memory consuming processor): 334 </div><div style="border-collapse: separate; border-spacing: 0px; ">> INFOG(22) (size in MB of memory effectively used during factorization - sum over all processors): 19779 </div><div style="border-collapse: separate; border-spacing: 0px; ">472a473,478</div><div style="border-collapse: separate; border-spacing: 0px; ">> INFOG(28) (after factorization: number of null pivots encountered): 0</div><div style="border-collapse: separate; border-spacing: 0px; ">> INFOG(29) (after factorization: effective number of entries in the factors (sum over all processors)): 470143172</div><div style="border-collapse: separate; border-spacing: 0px; ">> INFOG(30, 31) (after solution: size in Mbytes of memory used during solution phase): 202, 10547</div><div style="border-collapse: separate; border-spacing: 0px; ">> INFOG(32) (after analysis: type of analysis done): 1</div><div style="border-collapse: separate; border-spacing: 0px; ">> INFOG(33) (value used for ICNTL(8)): 0</div><div style="border-collapse: separate; border-spacing: 0px; ">> INFOG(34) (exponent of the determinant if determinant is requested): 0</div><div style="border-collapse: separate; border-spacing: 0px; ">474c480</div><div style="border-collapse: separate; border-spacing: 0px; ">< Matrix Object: 64 MPI processes</div><div style="border-collapse: separate; border-spacing: 0px; ">---</div><div style="border-collapse: separate; border-spacing: 0px; ">> Mat Object: 64 MPI processes</div><div style="border-collapse: separate; border-spacing: 0px; ">477c483</div><div style="border-collapse: separate; border-spacing: 0px; ">< total: nonzeros=63720324, allocated nonzeros=63720324</div><div style="border-collapse: separate; border-spacing: 0px; ">---</div><div style="border-collapse: separate; border-spacing: 0px; ">> total: nonzeros=6.37203e+07, allocated nonzeros=6.37203e+07</div><div style="border-collapse: separate; border-spacing: 0px; ">481c487</div><div style="border-collapse: separate; border-spacing: 0px; ">< Norme de U 1 7.37266E-02, L 1 1.00000E+00</div><div style="border-collapse: separate; border-spacing: 0px; ">---</div><div style="border-collapse: separate; border-spacing: 0px; ">> Norme de U 1 1.61172E-02, L 1 1.00000E+00</div><div style="border-collapse: separate; border-spacing: 0px; ">483c489</div><div style="border-collapse: separate; border-spacing: 0px; ">< Temps total d execution : 198.373291969299 </div><div style="border-collapse: separate; border-spacing: 0px; ">---</div><div style="border-collapse: separate; border-spacing: 0px; ">> Temps total d execution : 216.934082031250 </div><div style="border-collapse: separate; border-spacing: 0px; "><br></div><div style="border-collapse: separate; border-spacing: 0px; "><br></div><div style="border-collapse: separate; border-spacing: 0px; ">Which does not reveal any striking differences, except in the L2 norm of the solution vectors.</div><div style="border-collapse: separate; border-spacing: 0px; "><br></div><div style="border-collapse: separate; border-spacing: 0px; ">I need assistance to help me to overcome this quite bizarre behavior.</div><div style="border-collapse: separate; border-spacing: 0px; "><br></div><div style="border-collapse: separate; border-spacing: 0px; ">Thank you.</div><div style="border-collapse: separate; border-spacing: 0px; "><br></div>Marc MEDALE</div><div style="color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; border-collapse: separate; border-spacing: 0px; "><br></div><div style="color: rgb(0, 0, 0); font-family: Helvetica; font-size: medium; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; ">=========================================================<br><div>Université Aix-Marseille, Polytech'Marseille, Dépt Mécanique Energétique</div>Laboratoire IUSTI, UMR 7343 CNRS-Université Aix-Marseille<br>Technopole de Chateau-Gombert, 5 rue Enrico Fermi<br>13453 MARSEILLE, Cedex 13, FRANCE<br>---------------------------------------------------------------------------------------------------<br>Tel : +33 (0)4.91.10.69.14 ou 38<br>Fax : +33 (0)4.91.10.69.69<br>e-mail : <a href="mailto:marc.medale@univ-amu.fr">marc.medale@univ-amu.fr</a><br>=========================================================</div><br class="Apple-interchange-newline"></div></span><br></div></span></div></span></div></span></div></span></span></div></div></body></html>