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<p style="margin-top:0;margin-bottom:0">Hi Dave,</p>
<p style="margin-top:0;margin-bottom:0"> Thanks for the tip - you were right, and this works better for higher resolutions now.</p>
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<p style="margin-top:0;margin-bottom:0">all the best</p>
<p style="margin-top:0;margin-bottom:0">--Colin</p>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Dave May <dave.mayhem23@gmail.com><br>
<b>Sent:</b> 19 March 2019 11:25:11<br>
<b>To:</b> Cotter, Colin J<br>
<b>Cc:</b> petsc-users@mcs.anl.gov<br>
<b>Subject:</b> Re: [petsc-users] Confusing Schur preconditioner behaviour</font>
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Hi Colin,</div>
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<div class="x_gmail_quote">
<div dir="ltr" class="x_gmail_attr">On Tue, 19 Mar 2019 at 09:33, Cotter, Colin J <<a href="mailto:colin.cotter@imperial.ac.uk">colin.cotter@imperial.ac.uk</a>> wrote:<br>
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<p style="margin-top:0px; margin-bottom:0px">Hi Dave,</p>
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<div class="x_gmail-m_8482798322617626713x_gmail_quote">
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<div dir="auto">>If you are doing that, then you need to tell fieldsplit to use the Amat to define the splits otherwise it will define the Schur compliment as </div>
<div dir="auto">>S = B22 - B21 inv(B11) B12</div>
<div dir="auto">>preconditiones with B22, where as what you want is </div>
<div dir="auto">>S = A22 - A21 inv(A11) A12</div>
<div dir="auto">>preconditioned with B22.</div>
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<div dir="auto">>If your operators are set up this way and you didn't indicate to use Amat to define S this would definitely explain why preonly works but iterating on Schur does not.</div>
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<div dir="auto">Yes, thanks - this solves it! I need pc_use_amat.</div>
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<div>Okay great. But doesn't that option eradicate your custom Schur complement object which you inserted into the Bmat in the (2,2) slot?</div>
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</div>
<div>I thought you would use the option</div>
<div>-pc_fieldsplit_diag_use_amat<br>
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</div>
<div>In general for fieldsplit (Schur) I found that the best way to manage user defined Schur complement preconditioners is via PCFieldSplitSetSchurPre().</div>
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<div><a href="https://www.mcs.anl.gov/petsc/petsc-current/docs/manualpages/PC/PCFieldSplitSetSchurPre.html#PCFieldSplitSetSchurPre">https://www.mcs.anl.gov/petsc/petsc-current/docs/manualpages/PC/PCFieldSplitSetSchurPre.html#PCFieldSplitSetSchurPre</a><br>
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<div><br>
</div>
<div>Also, for solver debugging purposes with fieldsplit and MatNest, I find it incredibly useful to attach textual names to all the matrices going to into FieldSplit. You can use PetscObjectSetName() with each of your sub-matrices in the Amat and the Bmat,
and any schur complement operators. The textual names will be displayed in KSP view. In that way you have a better chance of understanding which operators are being used where. (Note that this trick is less useful with the Amat and Bmat are AIJ matrices).</div>
<div><br>
</div>
<div>Below is an example KSPView associated with 2x2 block system where I've attached the names Auu,Aup,Apu,App, and S* to the Amat sub-matices and the schur complement preconditioner.</div>
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</div>
<div>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures">PC Object:(dcy_) 1 MPI processes</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>type: fieldsplit</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>FieldSplit with Schur preconditioner, factorization FULL</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>Preconditioner for the Schur complement formed from Sp, an assembled approximation to S, which uses (lumped, if requested) A00's diagonal's inverse</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>Split info:</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>Split number 0 Defined by IS</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>Split number 1 Defined by IS</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>KSP solver for A00 block</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>KSP Object:<span class="x_gmail-Apple-converted-space"> </span>(dcy_fieldsplit_u_)
<span class="x_gmail-Apple-converted-space"> </span>1 MPI processes</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>type: preonly</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>maximum iterations=10000, initial guess is zero</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>tolerances:<span class="x_gmail-Apple-converted-space"> </span>relative=1e-05, absolute=1e-50, divergence=10000.</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>left preconditioning</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>using NONE norm type for convergence test</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>PC Object:<span class="x_gmail-Apple-converted-space"> </span>(dcy_fieldsplit_u_)
<span class="x_gmail-Apple-converted-space"> </span>1 MPI processes</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>type: lu</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>LU: out-of-place factorization</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>tolerance for zero pivot 2.22045e-14</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>matrix ordering: nd</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>factor fill ratio given 0., needed 0.</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>Factored matrix follows:</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>Mat Object: <span class="x_gmail-Apple-converted-space"> </span>
1 MPI processes</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>type: seqaij</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>rows=85728, cols=85728</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>package used to perform factorization: umfpack</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>total: nonzeros=0, allocated nonzeros=0</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>total number of mallocs used during MatSetValues calls =0</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>not using I-node routines</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>UMFPACK run parameters:</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>Control[UMFPACK_PRL]: 1.</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>Control[UMFPACK_STRATEGY]: 0.</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>Control[UMFPACK_DENSE_COL]: 0.2</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>Control[UMFPACK_DENSE_ROW]: 0.2</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>Control[UMFPACK_AMD_DENSE]: 10.</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>Control[UMFPACK_BLOCK_SIZE]: 32.</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>Control[UMFPACK_FIXQ]: 0.</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>Control[UMFPACK_AGGRESSIVE]: 1.</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>Control[UMFPACK_PIVOT_TOLERANCE]: 0.1</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>Control[UMFPACK_SYM_PIVOT_TOLERANCE]: 0.001</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>Control[UMFPACK_SCALE]: 1.</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>Control[UMFPACK_ALLOC_INIT]: 0.7</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>Control[UMFPACK_DROPTOL]: 0.</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>Control[UMFPACK_IRSTEP]: 0.</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>Control[UMFPACK_ORDERING]: AMD (not using the PETSc ordering)</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>linear system matrix = precond matrix:</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>Mat Object:<span class="x_gmail-Apple-converted-space"> </span>Auu<span class="x_gmail-Apple-converted-space">
</span>(dcy_fieldsplit_u_) <span class="x_gmail-Apple-converted-space"> </span>
1 MPI processes</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>type: seqaij</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>rows=85728, cols=85728</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>total: nonzeros=1028736, allocated nonzeros=1028736</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>total number of mallocs used during MatSetValues calls =0</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>using I-node routines: found 21432 nodes, limit used is 5</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>KSP solver for S = A11 - A10 inv(A00) A01<span class="x_gmail-Apple-converted-space"> </span></span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>KSP Object:<span class="x_gmail-Apple-converted-space"> </span>(dcy_fieldsplit_p_)
<span class="x_gmail-Apple-converted-space"> </span>1 MPI processes</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>type: fgmres</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>GMRES: restart=30, using Classical (unmodified) Gram-Schmidt Orthogonalization with no iterative refinement</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>GMRES: happy breakdown tolerance 1e-30</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>maximum iterations=300, initial guess is zero</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>tolerances:<span class="x_gmail-Apple-converted-space"> </span>relative=0.01, absolute=1e-50, divergence=10000.</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>right preconditioning</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>using UNPRECONDITIONED norm type for convergence test</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>PC Object:<span class="x_gmail-Apple-converted-space"> </span>(dcy_fieldsplit_p_)
<span class="x_gmail-Apple-converted-space"> </span>1 MPI processes</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>type: lu</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>LU: out-of-place factorization</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>tolerance for zero pivot 2.22045e-14</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>matrix ordering: nd</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>factor fill ratio given 0., needed 0.</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>Factored matrix follows:</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>Mat Object: <span class="x_gmail-Apple-converted-space"> </span>
1 MPI processes</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>type: seqaij</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>rows=32542, cols=32542</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>package used to perform factorization: umfpack</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>total: nonzeros=0, allocated nonzeros=0</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>total number of mallocs used during MatSetValues calls =0</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>not using I-node routines</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>UMFPACK run parameters:</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>Control[UMFPACK_PRL]: 1.</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>Control[UMFPACK_STRATEGY]: 0.</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>Control[UMFPACK_DENSE_COL]: 0.2</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>Control[UMFPACK_DENSE_ROW]: 0.2</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>Control[UMFPACK_AMD_DENSE]: 10.</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>Control[UMFPACK_BLOCK_SIZE]: 32.</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>Control[UMFPACK_FIXQ]: 0.</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>Control[UMFPACK_AGGRESSIVE]: 1.</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>Control[UMFPACK_PIVOT_TOLERANCE]: 0.1</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>Control[UMFPACK_SYM_PIVOT_TOLERANCE]: 0.001</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>Control[UMFPACK_SCALE]: 1.</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>Control[UMFPACK_ALLOC_INIT]: 0.7</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>Control[UMFPACK_DROPTOL]: 0.</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>Control[UMFPACK_IRSTEP]: 0.</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>Control[UMFPACK_ORDERING]: AMD (not using the PETSc ordering)</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>linear system matrix followed by preconditioner matrix:</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>Mat Object:<span class="x_gmail-Apple-converted-space"> </span>(dcy_fieldsplit_p_)
<span class="x_gmail-Apple-converted-space"> </span>1 MPI processes</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>type: schurcomplement</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>rows=32542, cols=32542</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>Schur complement A11 - A10 inv(A00) A01</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>A11</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>Mat Object:<span class="x_gmail-Apple-converted-space"> </span>
App<span class="x_gmail-Apple-converted-space"> </span>(dcy_fieldsplit_p_)
<span class="x_gmail-Apple-converted-space"> </span>1 MPI processes</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>type: seqaij</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>rows=32542, cols=32542</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>total: nonzeros=548482, allocated nonzeros=548482</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>total number of mallocs used during MatSetValues calls =0</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>not using I-node routines</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>A10</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>Mat Object:<span class="x_gmail-Apple-converted-space"> </span>
Apu <span class="x_gmail-Apple-converted-space"> </span>1 MPI processes</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>type: seqaij</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>rows=32542, cols=85728</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>total: nonzeros=857280, allocated nonzeros=921990</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>total number of mallocs used during MatSetValues calls =0</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>not using I-node routines</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>KSP of A00</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>KSP Object:<span class="x_gmail-Apple-converted-space"> </span>
(dcy_fieldsplit_u_) <span class="x_gmail-Apple-converted-space"> </span>
1 MPI processes</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>type: preonly</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>maximum iterations=10000, initial guess is zero</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>tolerances:<span class="x_gmail-Apple-converted-space"> </span>relative=1e-05, absolute=1e-50, divergence=10000.</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>left preconditioning</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>using NONE norm type for convergence test</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>PC Object:<span class="x_gmail-Apple-converted-space"> </span>
(dcy_fieldsplit_u_) <span class="x_gmail-Apple-converted-space"> </span>
1 MPI processes</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>type: lu</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>LU: out-of-place factorization</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>tolerance for zero pivot 2.22045e-14</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>matrix ordering: nd</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>factor fill ratio given 0., needed 0.</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>Factored matrix follows:</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>Mat Object: <span class="x_gmail-Apple-converted-space">
</span>1 MPI processes</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>type: seqaij</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>rows=85728, cols=85728</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>package used to perform factorization: umfpack</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>total: nonzeros=0, allocated nonzeros=0</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>total number of mallocs used during MatSetValues calls =0</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>not using I-node routines</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>UMFPACK run parameters:</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>Control[UMFPACK_PRL]: 1.</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>Control[UMFPACK_STRATEGY]: 0.</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>Control[UMFPACK_DENSE_COL]: 0.2</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>Control[UMFPACK_DENSE_ROW]: 0.2</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>Control[UMFPACK_AMD_DENSE]: 10.</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>Control[UMFPACK_BLOCK_SIZE]: 32.</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>Control[UMFPACK_FIXQ]: 0.</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>Control[UMFPACK_AGGRESSIVE]: 1.</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>Control[UMFPACK_PIVOT_TOLERANCE]: 0.1</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>Control[UMFPACK_SYM_PIVOT_TOLERANCE]: 0.001</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>Control[UMFPACK_SCALE]: 1.</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>Control[UMFPACK_ALLOC_INIT]: 0.7</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>Control[UMFPACK_DROPTOL]: 0.</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>Control[UMFPACK_IRSTEP]: 0.</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>Control[UMFPACK_ORDERING]: AMD (not using the PETSc ordering)</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>linear system matrix = precond matrix:</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>Mat Object:<span class="x_gmail-Apple-converted-space"> </span>
Auu<span class="x_gmail-Apple-converted-space"> </span>(dcy_fieldsplit_u_)
<span class="x_gmail-Apple-converted-space"> </span>1 MPI processes</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>type: seqaij</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>rows=85728, cols=85728</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>total: nonzeros=1028736, allocated nonzeros=1028736</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>total number of mallocs used during MatSetValues calls =0</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>using I-node routines: found 21432 nodes, limit used is 5</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>A01</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>Mat Object:<span class="x_gmail-Apple-converted-space"> </span>
Aup <span class="x_gmail-Apple-converted-space"> </span>1 MPI processes</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>type: seqaij</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>rows=85728, cols=32542</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>total: nonzeros=857280, allocated nonzeros=942634</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>total number of mallocs used during MatSetValues calls =0</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>using I-node routines: found 21432 nodes, limit used is 5</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space"> </span></span><span style="font-variant-ligatures:no-common-ligatures">Mat Object:</span><span class="x_gmail-Apple-converted-space" style="font-variant-ligatures:no-common-ligatures">
</span><span style="font-variant-ligatures:no-common-ligatures">S* </span><span class="x_gmail-Apple-converted-space" style="font-variant-ligatures:no-common-ligatures"> </span><span style="font-variant-ligatures:no-common-ligatures">1
MPI processes</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>type: seqaij</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>rows=32542, cols=32542</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>total: nonzeros=548482, allocated nonzeros=548482</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>total number of mallocs used during MatSetValues calls =0</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>not using I-node routines</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>linear system matrix = precond matrix:</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>Mat Object: <span class="x_gmail-Apple-converted-space"> </span>1 MPI processes</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>type: nest</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>rows=118270, cols=118270</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>has attached null space</span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>Matrix object:<span class="x_gmail-Apple-converted-space"> </span></span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>type=nest, rows=2, cols=2<span class="x_gmail-Apple-converted-space"> </span></span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>MatNest structure:<span class="x_gmail-Apple-converted-space"> </span></span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>(0,0) : name="Auu", prefix="dcy_fieldsplit_u_", type=seqaij, rows=85728, cols=85728<span class="x_gmail-Apple-converted-space"> </span></span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>(0,1) : name="Aup", type=seqaij, rows=85728, cols=32542<span class="x_gmail-Apple-converted-space"> </span></span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>(1,0) : name="Apu", type=seqaij, rows=32542, cols=85728<span class="x_gmail-Apple-converted-space"> </span></span></p>
<p class="x_gmail-p1" style="margin:0px; font:10px Monaco; color:rgb(245,245,245); background-color:rgb(0,0,0)">
<span class="x_gmail-s1" style="font-variant-ligatures:no-common-ligatures"><span class="x_gmail-Apple-converted-space">
</span>(1,1) : name="App", prefix="dcy_fieldsplit_p_", type=seqaij, rows=32542, cols=32542<span class="x_gmail-Apple-converted-space"> </span></span></p>
</div>
<div><br>
</div>
<div><br>
</div>
<div><br>
</div>
<div><br>
</div>
<div><br>
</div>
<div> </div>
<blockquote class="x_gmail_quote" style="margin:0px 0px 0px 0.8ex; border-left:1px solid rgb(204,204,204); padding-left:1ex">
<div dir="ltr">
<div id="x_gmail-m_8482798322617626713divtagdefaultwrapper" dir="ltr" style="font-size:12pt; color:rgb(0,0,0); font-family:Calibri,Helvetica,sans-serif,EmojiFont,"Apple Color Emoji","Segoe UI Emoji",NotoColorEmoji,"Segoe UI Symbol","Android Emoji",EmojiSymbols">
<div style="color:rgb(0,0,0)">
<div>
<div>
<div class="x_gmail-m_8482798322617626713x_gmail_quote">
<div dir="auto"><br>
</div>
<div dir="auto">all the best</div>
<div dir="auto">--Colin</div>
<blockquote class="x_gmail-m_8482798322617626713x_gmail_quote" style="margin:0px 0px 0px 0.8ex; border-left:1px solid rgb(204,204,204); padding-left:1ex">
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<blockquote class="x_gmail-m_8482798322617626713x_gmail_quote" style="margin:0px 0px 0px 0.8ex; border-left:1px solid rgb(204,204,204); padding-left:1ex">
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<p></p>
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</blockquote>
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</blockquote>
</div>
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