On Tue, Dec 10, 2013 at 8:58 AM, Lorenzo Zanon <za...@aices.rwth-aachen.de> wrote: > Hi, > > After re-installing petsc with Hypre should I recompile libmesh as well?
Definitely. > Otherwise here are the detailed outputs (JFNK, LU, and -ksp_rtol 1e-4): > > > NL step 0, |residual|_2 = 3.464102e-05 > 0 KSP Residual norm 3.212616421517e-03 ... > 27 KSP Residual norm 5.868687294700e-08 > 28 KSP Residual norm 8.654056711463e-09 > NL step 1, |residual|_2 = 2.417677e-04 Here you can see you're "oversolving" the linear system quite a bit. > NL step 2, |residual|_2 = 6.140305e-08 > 0 KSP Residual norm 4.390107230670e-07 ... > 28 KSP Residual norm 3.523137533760e-12 Here, near the root, you possibly could have reached your nl_tol by using a smaller ksp_rtol and avoided doing another Newton step -snes_ksp_ew will theoretically help with both of these issues. -- John ------------------------------------------------------------------------------ Rapidly troubleshoot problems before they affect your business. Most IT organizations don't have a clear picture of how application performance affects their revenue. With AppDynamics, you get 100% visibility into your Java,.NET, & PHP application. Start your 15-day FREE TRIAL of AppDynamics Pro! http://pubads.g.doubleclick.net/gampad/clk?id=84349831&iu=/4140/ostg.clktrk _______________________________________________ Libmesh-users mailing list Libmesh-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/libmesh-users
