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<div>Hi all, </div>
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<div>back at work on Aspect and performance related issues. Following your last email's advice to </div>
<div>use a different trilinos, I have installed trilinos-11.0.3 (we used 10.4.2 so far) yesterday and I am happy to report that it makes a difference:</div>
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<div>setup reinit has gone from 3.55s to 1.53s<br>
setup system matrix has gone from 214s to 68.8s<br>
setup system preconditioner has gone from 95.2s to 21.2s</div>
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<div><b>Q1</b>: are these numbers normal in your opinion ? still too high ?</div>
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<div>However, it has also had a nasty consequence on the Stokes timings:</div>
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<div>Assemble Stokes system has gone from <b>314s</b> to <b>445s</b></div>
<div>Build Stokes preconditioner has gone from <b>138s</b> to <b>250s</b></div>
<div>Solve Stokes system has gone from <b>81.4</b> to <b>115s</b> </div>
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<div>(Assemble composition system has remained the same at about 520s )<br>
(Assemble temperature system has remained the same at about 520s )<br>
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<div>I have had a look at the assembly routine and put there a number of "computing_timer" commands. </div>
<div>It turns out that the part between line 955 and line 998 (the WorkStream:: run … part) takes 260s </div>
<div>and that the part after it "system_matrix.compress();" takes 363s.</div>
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<div><b>Q2</b>: would you have any idea of what is happening and how we could solve this in the briefest delays ? </div>
<div>(EGU spring meeting is in less than three weeks)</div>
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<div>thanks,</div>
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<div>Cedric.</div>
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<div>ps: I hereby attach again a typical output, which is obtained on threads.</div>
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<div><img id="2384af9d-9883-460e-98b0-f311d5cc83ef" height="810" width="978" apple-width="yes" apple-height="yes" src="cid:0136F42E-C0EB-46E9-B601-E3C818D5CE87@geo.uu.nl"></div>
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