<div dir="ltr"><div>I'm exploring fieldsplit with Schur (this continues from some emails I sent a few weeks ago about this topic), and I had a quick question about the inner vs outer convergence.</div><div><br></div><div>I've pasted the output below from "-ksp_monitor -fieldsplit_FE_split_ksp_monitor", and I'm just wondering about why the second outer iteration has two inner iteration loops, whereas all the other outer iterations have one inner iteration loop? I assume it is something to do with a convergence tolerance, but it's not clear to me which tolerance would control that.</div><div><br></div><div>Thanks,</div><div>David</div><div><br></div><div>------------------------------------------------------------------</div><div><br></div><div><div> Residual norms for fieldsplit_FE_split_ solve.</div><div> 0 KSP Residual norm 4.742303891408e+01 </div><div> 1 KSP Residual norm 2.909253505630e-01 </div><div> 2 KSP Residual norm 9.891933795059e-02 </div><div> 3 KSP Residual norm 7.147789520745e-02 </div><div> 4 KSP Residual norm 1.668752967907e-02 </div><div> 5 KSP Residual norm 5.019869896662e-03 </div><div> 6 KSP Residual norm 2.848579237244e-03 </div><div> 7 KSP Residual norm 2.847897269641e-03 </div><div> 8 KSP Residual norm 2.840502392022e-03 </div><div> 9 KSP Residual norm 2.831875522381e-03 </div><div> 10 KSP Residual norm 2.688309287993e-03 </div><div> 11 KSP Residual norm 1.351494303229e-03 </div><div> 12 KSP Residual norm 1.350874246297e-03 </div><div> 13 KSP Residual norm 9.154691604943e-06 </div><div> 0 KSP Residual norm 2.254632353893e+02 </div><div> Residual norms for fieldsplit_FE_split_ solve.</div><div> 0 KSP Residual norm 4.742303891408e+01 </div><div> 1 KSP Residual norm 2.909253505630e-01 </div><div> 2 KSP Residual norm 9.891933795059e-02 </div><div> 3 KSP Residual norm 7.147789520745e-02 </div><div> 4 KSP Residual norm 1.668752967907e-02 </div><div> 5 KSP Residual norm 5.019869896662e-03 </div><div> 6 KSP Residual norm 2.848579237244e-03 </div><div> 7 KSP Residual norm 2.847897269641e-03 </div><div> 8 KSP Residual norm 2.840502392022e-03 </div><div> 9 KSP Residual norm 2.831875522381e-03 </div><div> 10 KSP Residual norm 2.688309287993e-03 </div><div> 11 KSP Residual norm 1.351494303229e-03 </div><div> 12 KSP Residual norm 1.350874246297e-03 </div><div> 13 KSP Residual norm 9.154691604943e-06 </div><div> Residual norms for fieldsplit_FE_split_ solve.</div><div> 0 KSP Residual norm 1.554697370480e-05 </div><div> 1 KSP Residual norm 1.554471967929e-05 </div><div> 2 KSP Residual norm 1.551293889691e-05 </div><div> 3 KSP Residual norm 8.031337431574e-06 </div><div> 4 KSP Residual norm 4.137185786243e-06 </div><div> 5 KSP Residual norm 4.066606123330e-06 </div><div> 6 KSP Residual norm 4.051107282928e-06 </div><div> 7 KSP Residual norm 4.047442850256e-06 </div><div> 8 KSP Residual norm 4.047129984657e-06 </div><div> 9 KSP Residual norm 4.030697964677e-06 </div><div> 10 KSP Residual norm 2.882383190940e-06 </div><div> 11 KSP Residual norm 3.325005138484e-07 </div><div> 12 KSP Residual norm 2.107354774516e-07 </div><div> 13 KSP Residual norm 2.107005548204e-07 </div><div> 14 KSP Residual norm 4.399320792736e-08 </div><div> 15 KSP Residual norm 4.236902403786e-08 </div><div> 16 KSP Residual norm 2.932877082709e-08 </div><div> 17 KSP Residual norm 3.881909203171e-09 </div><div> 18 KSP Residual norm 1.107791399514e-09 </div><div> 19 KSP Residual norm 2.645048006100e-11 </div><div> 1 KSP Residual norm 8.266776463696e-01 </div><div> Residual norms for fieldsplit_FE_split_ solve.</div><div> 0 KSP Residual norm 9.262528453386e-08 </div><div> 1 KSP Residual norm 5.683232925010e-10 </div><div> 2 KSP Residual norm 1.915223168286e-10 </div><div> 3 KSP Residual norm 1.397893184942e-10 </div><div> 4 KSP Residual norm 1.691441435404e-11 </div><div> 5 KSP Residual norm 6.138315243419e-12 </div><div> 6 KSP Residual norm 5.576043830003e-12 </div><div> 7 KSP Residual norm 5.574440028225e-12 </div><div> 8 KSP Residual norm 5.559544964428e-12 </div><div> 9 KSP Residual norm 5.539862581746e-12 </div><div> 10 KSP Residual norm 5.258329460152e-12 </div><div> 11 KSP Residual norm 2.643581511791e-12 </div><div> 12 KSP Residual norm 2.641293392449e-12 </div><div> 13 KSP Residual norm 2.354608977643e-14 </div><div> 2 KSP Residual norm 4.450925351013e-07 </div><div> Residual norms for fieldsplit_FE_split_ solve.</div><div> 0 KSP Residual norm 6.653681330477e-14 </div><div> 1 KSP Residual norm 6.650750698147e-14 </div><div> 2 KSP Residual norm 6.111123464526e-14 </div><div> 3 KSP Residual norm 2.026817941567e-14 </div><div> 4 KSP Residual norm 9.604999144183e-15 </div><div> 5 KSP Residual norm 9.208296307424e-15 </div><div> 6 KSP Residual norm 9.196769686859e-15 </div><div> 7 KSP Residual norm 9.185058975459e-15 </div><div> 8 KSP Residual norm 9.180207477303e-15 </div><div> 9 KSP Residual norm 8.991574890909e-15 </div><div> 10 KSP Residual norm 8.032736869820e-15 </div><div> 11 KSP Residual norm 1.536409278928e-15 </div><div> 12 KSP Residual norm 1.177374264280e-15 </div><div> 13 KSP Residual norm 1.175712092044e-15 </div><div> 14 KSP Residual norm 2.572275406087e-16 </div><div> 15 KSP Residual norm 2.548423809711e-16 </div><div> 16 KSP Residual norm 8.616505207588e-17 </div><div> 17 KSP Residual norm 7.563053994201e-18 </div><div> 18 KSP Residual norm 6.807636198601e-18 </div><div> 19 KSP Residual norm 9.747028518744e-19 </div><div> 20 KSP Residual norm 2.419807103570e-21 </div><div> 3 KSP Residual norm 2.986369469883e-09 </div><div> Residual norms for fieldsplit_FE_split_ solve.</div><div> 0 KSP Residual norm 7.813223137340e-16 </div><div> 1 KSP Residual norm 4.793103235095e-18 </div><div> 2 KSP Residual norm 1.615526128222e-18 </div><div> 3 KSP Residual norm 1.179102504397e-18 </div><div> 4 KSP Residual norm 1.427467627551e-19 </div><div> 5 KSP Residual norm 5.177440470993e-20 </div><div> 6 KSP Residual norm 4.703763659148e-20 </div><div> 7 KSP Residual norm 4.701953228322e-20 </div><div> 8 KSP Residual norm 4.689269668869e-20 </div><div> 9 KSP Residual norm 4.672625361251e-20 </div><div> 10 KSP Residual norm 4.435174006113e-20 </div><div> 11 KSP Residual norm 2.229156843383e-20 </div><div> 12 KSP Residual norm 2.228887211080e-20 </div><div> 13 KSP Residual norm 3.492936921635e-22 </div><div> 4 KSP Residual norm 3.753341263086e-15</div></div>
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