<div dir="ltr"><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">Here are five steps of more detailed output for Trilinos and PETSc. Both are in optimized mode, using composition_passive.prm</div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">
<br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">PETSc:</div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></div><div class="gmail_default"><div class="gmail_default">
<font face="arial, helvetica, sans-serif">Running with 4 MPI tasks.</font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif">Number of active cells: 1,024 (on 6 levels)</font></div><div class="gmail_default">
<font face="arial, helvetica, sans-serif">Number of degrees of freedom: 22,214 (8,450+1,089+4,225+4,225+4,225)</font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif"><br></font></div><div class="gmail_default">
<font face="arial, helvetica, sans-serif">*** Timestep 0: t=0 seconds</font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif"> Solving temperature system... 0 iterations.</font></div><div class="gmail_default">
<font face="arial, helvetica, sans-serif"> Solving composition system 1... 0 iterations.</font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif"> Solving composition system 2... 0 iterations.</font></div>
<div class="gmail_default"><font face="arial, helvetica, sans-serif"> Rebuilding Stokes preconditioner...</font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif"> Solving Stokes system... 20 iterations.</font></div>
<div class="gmail_default"><font face="arial, helvetica, sans-serif"><br></font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif"> Postprocessing:</font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif"> Writing graphical output: output/solution-00000</font></div>
<div class="gmail_default"><font face="arial, helvetica, sans-serif"> Temperature min/avg/max: 0 K, 0.5 K, 1 K</font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif"> Compositions min/max/mass: 0/1/0.3854 // 0/1/0.3854</font></div>
<div class="gmail_default"><font face="arial, helvetica, sans-serif"><br></font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif">*** Timestep 1: t=0.015625 seconds</font></div><div class="gmail_default">
<font face="arial, helvetica, sans-serif"> Solving temperature system... 31 iterations.</font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif"> Solving composition system 1... 32 iterations.</font></div>
<div class="gmail_default"><font face="arial, helvetica, sans-serif"> Solving composition system 2... 39 iterations.</font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif"> Rebuilding Stokes preconditioner...</font></div>
<div class="gmail_default"><font face="arial, helvetica, sans-serif"> Solving Stokes system... 5 iterations.</font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif"><br></font></div><div class="gmail_default">
<font face="arial, helvetica, sans-serif"> Postprocessing:</font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif"> Temperature min/avg/max: 0 K, 0.5 K, 1 K</font></div><div class="gmail_default">
<font face="arial, helvetica, sans-serif"> Compositions min/max/mass: -0.04786/1.017/0.3854 // -0.04708/1.035/0.3854</font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif"><br></font></div><div class="gmail_default">
<font face="arial, helvetica, sans-serif">*** Timestep 2: t=0.03125 seconds</font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif"> Solving temperature system... 41 iterations.</font></div><div class="gmail_default">
<font face="arial, helvetica, sans-serif"> Solving composition system 1... 35 iterations.</font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif"> Solving composition system 2... 44 iterations.</font></div>
<div class="gmail_default"><font face="arial, helvetica, sans-serif"> Rebuilding Stokes preconditioner...</font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif"> Solving Stokes system... 20 iterations.</font></div>
<div class="gmail_default"><font face="arial, helvetica, sans-serif"><br></font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif"> Postprocessing:</font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif"> Temperature min/avg/max: 0 K, 0.5 K, 1 K</font></div>
<div class="gmail_default"><font face="arial, helvetica, sans-serif"> Compositions min/max/mass: -0.05936/1.007/0.3854 // -0.05107/1.01/0.3854</font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif"><br>
</font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif">*** Timestep 3: t=0.046875 seconds</font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif"> Solving temperature system... 43 iterations.</font></div>
<div class="gmail_default"><font face="arial, helvetica, sans-serif"> Solving composition system 1... 37 iterations.</font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif"> Solving composition system 2... 45 iterations.</font></div>
<div class="gmail_default"><font face="arial, helvetica, sans-serif"> Rebuilding Stokes preconditioner...</font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif"> Solving Stokes system... 19 iterations.</font></div>
<div class="gmail_default"><font face="arial, helvetica, sans-serif"><br></font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif"> Postprocessing:</font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif"> Temperature min/avg/max: 0 K, 0.4999 K, 1 K</font></div>
<div class="gmail_default"><font face="arial, helvetica, sans-serif"> Compositions min/max/mass: -0.03993/1.007/0.3854 // -0.03474/1.004/0.3854</font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif"><br>
</font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif">*** Timestep 4: t=0.0625 seconds</font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif"> Solving temperature system... 41 iterations.</font></div>
<div class="gmail_default"><font face="arial, helvetica, sans-serif"> Solving composition system 1... 37 iterations.</font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif"> Solving composition system 2... 44 iterations.</font></div>
<div class="gmail_default"><font face="arial, helvetica, sans-serif"> Rebuilding Stokes preconditioner...</font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif"> Solving Stokes system... 19 iterations.</font></div>
<div class="gmail_default"><font face="arial, helvetica, sans-serif"><br></font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif"> Postprocessing:</font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif"> Temperature min/avg/max: 0 K, 0.4999 K, 1 K</font></div>
<div class="gmail_default"><font face="arial, helvetica, sans-serif"> Compositions min/max/mass: -0.027/1.006/0.3854 // -0.02073/1.003/0.3854</font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif"><br>
</font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif">*** Timestep 5: t=0.078125 seconds</font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif"> Solving temperature system... 43 iterations.</font></div>
<div class="gmail_default"><font face="arial, helvetica, sans-serif"> Solving composition system 1... 36 iterations.</font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif"> Solving composition system 2... 43 iterations.</font></div>
<div class="gmail_default"><font face="arial, helvetica, sans-serif"> Rebuilding Stokes preconditioner...</font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif"> Solving Stokes system... 19 iterations.</font></div>
<div class="gmail_default"><font face="arial, helvetica, sans-serif"><br></font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif"> Postprocessing:</font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif"> Temperature min/avg/max: 0 K, 0.4999 K, 1 K</font></div>
<div class="gmail_default"><font face="arial, helvetica, sans-serif"> Compositions min/max/mass: -0.0177/1.006/0.3854 // -0.01353/1.002/0.3854</font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif"><br>
</font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif"><br></font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif"><br></font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif">+---------------------------------------------+------------+------------+</font></div>
<div class="gmail_default"><font face="arial, helvetica, sans-serif">| Total wallclock time elapsed since start | 3.16s | |</font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif">| | | |</font></div>
<div class="gmail_default"><font face="arial, helvetica, sans-serif">| Section | no. calls | wall time | % of total |</font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif">+---------------------------------+-----------+------------+------------+</font></div>
<div class="gmail_default"><font face="arial, helvetica, sans-serif">| Assemble Stokes system | 6 | 0.565s | 18% |</font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif">| Assemble composition system | 12 | 0.712s | 23% |</font></div>
<div class="gmail_default"><font face="arial, helvetica, sans-serif">| Assemble temperature system | 6 | 0.495s | 16% |</font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif">| Build Stokes preconditioner | 6 | 0.436s | 14% |</font></div>
<div class="gmail_default"><font face="arial, helvetica, sans-serif">| Build composition preconditioner| 12 | 0.000605s | 0.019% |</font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif">| Build temperature preconditioner| 6 | 0.000622s | 0.02% |</font></div>
<div class="gmail_default"><font face="arial, helvetica, sans-serif">| Solve Stokes system | 6 | 0.393s | 12% |</font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif">| Solve composition system | 12 | 0.0991s | 3.1% |</font></div>
<div class="gmail_default"><font face="arial, helvetica, sans-serif">| Solve temperature system | 6 | 0.0648s | 2.1% |</font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif">| Initialization | 2 | 0.0381s | 1.2% |</font></div>
<div class="gmail_default"><font face="arial, helvetica, sans-serif">| Postprocessing | 6 | 0.0721s | 2.3% |</font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif">| Setup dof systems | 1 | 0.149s | 4.7% |</font></div>
<div class="gmail_default"><font face="arial, helvetica, sans-serif">+---------------------------------+-----------+------------+------------+</font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif"><br>
</font></div><div class="gmail_default" style><font face="arial, helvetica, sans-serif">Trilinos:</font></div><div class="gmail_default" style><font face="arial, helvetica, sans-serif"><br></font></div><div class="gmail_default" style>
<font face="arial, helvetica, sans-serif"><div class="gmail_default">Running with 4 MPI tasks.</div><div class="gmail_default">Number of active cells: 1,024 (on 6 levels)</div><div class="gmail_default">Number of degrees of freedom: 22,214 (8,450+1,089+4,225+4,225+4,225)</div>
<div class="gmail_default"><br></div><div class="gmail_default">*** Timestep 0: t=0 seconds</div><div class="gmail_default"> Solving temperature system... 0 iterations.</div><div class="gmail_default"> Solving composition system 1... 0 iterations.</div>
<div class="gmail_default"> Solving composition system 2... 0 iterations.</div><div class="gmail_default"> Rebuilding Stokes preconditioner...</div><div class="gmail_default"> Solving Stokes system... 30+2 iterations.</div>
<div class="gmail_default"><br></div><div class="gmail_default"> Postprocessing:</div><div class="gmail_default"> Writing graphical output: output/solution-00000</div><div class="gmail_default"> Temperature min/avg/max: 0 K, 0.5 K, 1 K</div>
<div class="gmail_default"> Compositions min/max/mass: 0/1/0.3854 // 0/1/0.3854</div><div class="gmail_default"><br></div><div class="gmail_default">*** Timestep 1: t=0.015625 seconds</div><div class="gmail_default">
Solving temperature system... 15 iterations.</div><div class="gmail_default"> Solving composition system 1... 13 iterations.</div><div class="gmail_default"> Solving composition system 2... 15 iterations.</div><div class="gmail_default">
Rebuilding Stokes preconditioner...</div><div class="gmail_default"> Solving Stokes system... 9 iterations.</div><div class="gmail_default"><br></div><div class="gmail_default"> Postprocessing:</div><div class="gmail_default">
Temperature min/avg/max: 0 K, 0.5 K, 1 K</div><div class="gmail_default"> Compositions min/max/mass: -0.04786/1.017/0.3854 // -0.04708/1.035/0.3854</div><div class="gmail_default"><br></div><div class="gmail_default">
*** Timestep 2: t=0.03125 seconds</div><div class="gmail_default"> Solving temperature system... 16 iterations.</div><div class="gmail_default"> Solving composition system 1... 13 iterations.</div><div class="gmail_default">
Solving composition system 2... 17 iterations.</div><div class="gmail_default"> Rebuilding Stokes preconditioner...</div><div class="gmail_default"> Solving Stokes system... 30+1 iterations.</div><div class="gmail_default">
<br></div><div class="gmail_default"> Postprocessing:</div><div class="gmail_default"> Temperature min/avg/max: 0 K, 0.5 K, 1 K</div><div class="gmail_default"> Compositions min/max/mass: -0.05936/1.007/0.3854 // -0.05107/1.01/0.3854</div>
<div class="gmail_default"><br></div><div class="gmail_default">*** Timestep 3: t=0.046875 seconds</div><div class="gmail_default"> Solving temperature system... 16 iterations.</div><div class="gmail_default"> Solving composition system 1... 12 iterations.</div>
<div class="gmail_default"> Solving composition system 2... 16 iterations.</div><div class="gmail_default"> Rebuilding Stokes preconditioner...</div><div class="gmail_default"> Solving Stokes system... 30 iterations.</div>
<div class="gmail_default"><br></div><div class="gmail_default"> Postprocessing:</div><div class="gmail_default"> Temperature min/avg/max: 0 K, 0.4999 K, 1 K</div><div class="gmail_default"> Compositions min/max/mass: -0.03993/1.007/0.3854 // -0.03474/1.004/0.3854</div>
<div class="gmail_default"><br></div><div class="gmail_default">*** Timestep 4: t=0.0625 seconds</div><div class="gmail_default"> Solving temperature system... 15 iterations.</div><div class="gmail_default"> Solving composition system 1... 12 iterations.</div>
<div class="gmail_default"> Solving composition system 2... 16 iterations.</div><div class="gmail_default"> Rebuilding Stokes preconditioner...</div><div class="gmail_default"> Solving Stokes system... 30 iterations.</div>
<div class="gmail_default"><br></div><div class="gmail_default"> Postprocessing:</div><div class="gmail_default"> Temperature min/avg/max: 0 K, 0.4999 K, 1 K</div><div class="gmail_default"> Compositions min/max/mass: -0.027/1.006/0.3854 // -0.02073/1.003/0.3854</div>
<div class="gmail_default"><br></div><div class="gmail_default">*** Timestep 5: t=0.078125 seconds</div><div class="gmail_default"> Solving temperature system... 15 iterations.</div><div class="gmail_default"> Solving composition system 1... 12 iterations.</div>
<div class="gmail_default"> Solving composition system 2... 15 iterations.</div><div class="gmail_default"> Rebuilding Stokes preconditioner...</div><div class="gmail_default"> Solving Stokes system... 30+2 iterations.</div>
<div class="gmail_default"><br></div><div class="gmail_default"> Postprocessing:</div><div class="gmail_default"> Temperature min/avg/max: 0 K, 0.4999 K, 1 K</div><div class="gmail_default"> Compositions min/max/mass: -0.0177/1.006/0.3854 // -0.01353/1.002/0.3854</div>
<div class="gmail_default"><br></div><div class="gmail_default"><br></div><div class="gmail_default"><br></div><div class="gmail_default">+---------------------------------------------+------------+------------+</div><div class="gmail_default">
| Total wallclock time elapsed since start | 3.29s | |</div><div class="gmail_default">| | | |</div><div class="gmail_default">| Section | no. calls | wall time | % of total |</div>
<div class="gmail_default">+---------------------------------+-----------+------------+------------+</div><div class="gmail_default">| Assemble Stokes system | 6 | 0.545s | 17% |</div><div class="gmail_default">
| Assemble composition system | 12 | 0.541s | 16% |</div><div class="gmail_default">| Assemble temperature system | 6 | 0.353s | 11% |</div><div class="gmail_default">| Build Stokes preconditioner | 6 | 0.51s | 15% |</div>
<div class="gmail_default">| Build composition preconditioner| 12 | 0.0777s | 2.4% |</div><div class="gmail_default">| Build temperature preconditioner| 6 | 0.0394s | 1.2% |</div><div class="gmail_default">
| Solve Stokes system | 6 | 0.657s | 20% |</div><div class="gmail_default">| Solve composition system | 12 | 0.0948s | 2.9% |</div><div class="gmail_default">| Solve temperature system | 6 | 0.0616s | 1.9% |</div>
<div class="gmail_default">| Initialization | 2 | 0.0493s | 1.5% |</div><div class="gmail_default">| Postprocessing | 6 | 0.0615s | 1.9% |</div><div class="gmail_default">
| Setup dof systems | 1 | 0.16s | 4.9% |</div><div class="gmail_default">+---------------------------------+-----------+------------+------------+</div><div><br></div></font></div><div class="gmail_default" style>
<font face="arial, helvetica, sans-serif"><br></font></div><div class="gmail_default" style><font face="arial, helvetica, sans-serif"><br></font></div><div class="gmail_default" style><font face="arial, helvetica, sans-serif"><br>
</font></div><div style="font-family:arial,helvetica,sans-serif"><br></div></div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Fri, Jan 17, 2014 at 11:58 AM, Ian Rose <span dir="ltr"><<a href="mailto:ian.rose@berkeley.edu" target="_blank">ian.rose@berkeley.edu</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div class="gmail_default"><div class="gmail_default"><font face="arial, helvetica, sans-serif">Alright, the problem seems to be in one of the inner CG solves. I can make it disappear by replacing </font></div>
<div class="gmail_default"><font face="arial, helvetica, sans-serif"> </font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif">SolverCG<LinearAlgebra::Vector> solver(solver_control);</font></div>
<div>with </div><div>PETScWrappers::SolverCG solver(solver_control);<br></div><div><br></div><div><br></div><div>Some timing information follows, composition_passive.prm run in optimized mode with four processors--</div>
<div><br></div><div class="gmail_default"><font face="arial, helvetica, sans-serif"><br></font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif">Aspect optimized, PETSc optimized:</font></div>
<div class="gmail_default"><font face="arial, helvetica, sans-serif">+---------------------------------------------+------------+------------+</font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif">| Total wallclock time elapsed since start | 69.9s | |</font></div>
<div class="im">
<div class="gmail_default"><font face="arial, helvetica, sans-serif">| | | |</font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif">| Section | no. calls | wall time | % of total |</font></div>
<div class="gmail_default"><font face="arial, helvetica, sans-serif">+---------------------------------+-----------+------------+------------+</font></div></div><div class="gmail_default"><font face="arial, helvetica, sans-serif">| Assemble Stokes system | 101 | 9.88s | 14% |</font></div>
<div class="gmail_default"><font face="arial, helvetica, sans-serif">| Assemble composition system | 202 | 12.6s | 18% |</font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif">| Assemble temperature system | 101 | 8.66s | 12% |</font></div>
<div class="gmail_default"><font face="arial, helvetica, sans-serif">| Build Stokes preconditioner | 101 | 7.66s | 11% |</font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif">| Build composition preconditioner| 202 | 0.0144s | 0.021% |</font></div>
<div class="gmail_default"><font face="arial, helvetica, sans-serif">| Build temperature preconditioner| 101 | 0.00868s | 0.012% |</font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif">| Solve Stokes system | 101 | 15.2s | 22% |</font></div>
<div class="gmail_default"><font face="arial, helvetica, sans-serif">| Solve composition system | 202 | 8.11s | 12% |</font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif">| Solve temperature system | 101 | 4.12s | 5.9% |</font></div>
<div class="gmail_default"><font face="arial, helvetica, sans-serif">| Initialization | 2 | 0.0451s | 0.065% |</font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif">| Postprocessing | 101 | 1.27s | 1.8% |</font></div>
<div class="gmail_default"><font face="arial, helvetica, sans-serif">| Setup dof systems | 1 | 0.157s | 0.22% |</font></div><div class="gmail_default"><font face="arial, helvetica, sans-serif">+---------------------------------+-----------+------------+------------+</font></div>
<div style="font-family:arial,helvetica,sans-serif"><br></div><div style="font-family:arial,helvetica,sans-serif">Aspect optimized, Trilinos: </div><div><div><font face="arial, helvetica, sans-serif">+---------------------------------------------+------------+------------+</font></div>
<div><font face="arial, helvetica, sans-serif">| Total wallclock time elapsed since start | 49.1s | |</font></div><div class="im"><div><font face="arial, helvetica, sans-serif">| | | |</font></div>
<div><font face="arial, helvetica, sans-serif">| Section | no. calls | wall time | % of total |</font></div><div><font face="arial, helvetica, sans-serif">+---------------------------------+-----------+------------+------------+</font></div>
</div><div><font face="arial, helvetica, sans-serif">| Assemble Stokes system | 101 | 9.16s | 19% |</font></div><div><font face="arial, helvetica, sans-serif">| Assemble composition system | 202 | 9.31s | 19% |</font></div>
<div><font face="arial, helvetica, sans-serif">| Assemble temperature system | 101 | 6.03s | 12% |</font></div><div><font face="arial, helvetica, sans-serif">| Build Stokes preconditioner | 101 | 8.51s | 17% |</font></div>
<div><font face="arial, helvetica, sans-serif">| Build composition preconditioner| 202 | 1.32s | 2.7% |</font></div><div><font face="arial, helvetica, sans-serif">| Build temperature preconditioner| 101 | 0.652s | 1.3% |</font></div>
<div><font face="arial, helvetica, sans-serif">| Solve Stokes system | 101 | 8.24s | 17% |</font></div><div><font face="arial, helvetica, sans-serif">| Solve composition system | 202 | 1.57s | 3.2% |</font></div>
<div><font face="arial, helvetica, sans-serif">| Solve temperature system | 101 | 0.836s | 1.7% |</font></div><div><font face="arial, helvetica, sans-serif">| Initialization | 2 | 0.0537s | 0.11% |</font></div>
<div><font face="arial, helvetica, sans-serif">| Postprocessing | 101 | 1.04s | 2.1% |</font></div><div><font face="arial, helvetica, sans-serif">| Setup dof systems | 1 | 0.157s | 0.32% |</font></div>
<div><font face="arial, helvetica, sans-serif">+---------------------------------+-----------+------------+------------+</font></div><div style="font-family:arial,helvetica,sans-serif"><br></div></div></div></div><div class="HOEnZb">
<div class="h5"><div class="gmail_extra">
<br><br><div class="gmail_quote">On Fri, Jan 17, 2014 at 11:32 AM, Ian Rose <span dir="ltr"><<a href="mailto:ian.rose@berkeley.edu" target="_blank">ian.rose@berkeley.edu</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr"><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">Okay, I can reproduce the 50x slowdown by linking to the debug PETSc. So there's that. However, I still get unsynchronized calls to PETSc when running on several processors with the debug version... It's certainly possible that something is up with my install, but the step-40 tutorial does seem to run fine.</div>
</div>
</blockquote></div><br></div>
</div></div></blockquote></div><br></div>