<div dir="ltr">
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><span style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline"><span> </span>Jumps like this usually indicate something is going very poorly in the algorithm. I hope the algorithmic experts have a chance to look at your case.</span></blockquote><div><br></div><div>I think the residual of the first unconverged eigenvalue is set to INF on purpose and not calculated in the iteration when a converged eigenvalue is found. Dividing the INF residual is a mistake:</div><br> if (d->nR[i]/a < data->fix) {<div><br></div><div>I think your suggestion will certainly fix this issue:</div><div><br></div><div>
<span style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:12.8px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline"> if (d->nR[i] < a*data->fix) {</span> </div><div><br></div><div>Just my guess.<div class="gmail_extra"><br></div><div class="gmail_extra">
<br><div class="gmail_quote">On Thu, May 3, 2018 at 11:28 PM, Smith, Barry F. <span dir="ltr"><<a href="mailto:bsmith@mcs.anl.gov" target="_blank">bsmith@mcs.anl.gov</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span><br>
<br>
> On May 3, 2018, at 10:24 PM, Harshad Sahasrabudhe <<a href="mailto:harshad.sahasrabudhe@gmail.com" target="_blank">harshad.sahasrabudhe@gmail.co<wbr>m</a>> wrote:<br>
> <br>
> Hi Barry,<br>
> <br>
> There's an overflow in the division:<br>
> <br>
> Program received signal SIGFPE, Arithmetic exception.<br>
> 0x00002aaab377ea26 in dvd_improvex_jd_lit_const_0 (d=0x1d29078, i=0, theta=0x1f396f8, thetai=0x1f39718, maxits=0x7fffffff816c, tol=0x7fffffff8140)<br>
> at /depot/ncn/apps/conte/conte-gc<wbr>c-petsc35-dbg/libs/slepc/build<wbr>-real/src/eps/impls/davidson/<wbr>common/dvd_improvex.c:1112<br>
> 1112 if (d->nR[i]/a < data->fix) {<br>
> <br>
> (gdb) p d->nR[i]<br>
> $7 = 1.7976931348623157e+308<br>
> (gdb) p a<br>
> $8 = 0.15744695659409991<br>
> <br>
> It looks like the residual is very high in the first GD iteration and rapidly drops in the second iteration<br>
> <br>
> 240 EPS nconv=0 first unconverged value (error) 0.0999172 (1.11889357e-12)<br>
> 241 EPS nconv=1 first unconverged value (error) 0.100311 (1.79769313e+308)<br>
<br>
</span> Jumps like this usually indicate something is going very poorly in the algorithm. I hope the algorithmic experts have a chance to look at your case.<br>
<span class="m_-714382692353963654HOEnZb"><font color="#888888"><br>
Barry<br>
</font></span><div class="m_-714382692353963654HOEnZb"><div class="m_-714382692353963654h5"><br>
> 242 EPS nconv=1 first unconverged value (error) 0.100311 (2.39980067e-04)<br>
> <br>
> Thanks,<br>
> Harshad<br>
> <br>
> On Thu, May 3, 2018 at 11:11 PM, Smith, Barry F. <<a href="mailto:bsmith@mcs.anl.gov" target="_blank">bsmith@mcs.anl.gov</a>> wrote:<br>
> <br>
> at /depot/ncn/apps/conte/conte-gc<wbr>c-petsc35-dbg/libs/slepc/build<wbr>-real/src/eps/impls/davidson/<wbr>common/dvd_improvex.c:1112<br>
> 1112 if (d->nR[i]/a < data->fix) {<br>
> <br>
> Likely the problem is due to the division by a when a is zero. Perhaps the code needs above a check that a is not zero. Or rewrite the check as<br>
> <br>
> if (d->nR[i] < a*data->fix) {<br>
> <br>
> Barry<br>
> <br>
> <br>
> > On May 3, 2018, at 7:58 PM, Harshad Sahasrabudhe <<a href="mailto:harshad.sahasrabudhe@gmail.com" target="_blank">harshad.sahasrabudhe@gmail.co<wbr>m</a>> wrote:<br>
> > <br>
> > Hello,<br>
> > <br>
> > I am solving for the lowest eigenvalues and eigenvectors of symmetric positive definite matrices in the generalized eigenvalue problem. I am using the GD solver with the default settings of PCBJACOBI. When I run a standalone executable on 16 processes which loads the matrices from a file and solves the eigenproblem, I get converged results in ~600 iterations. I am using PETSc/SLEPc 3.5.4.<br>
> > <br>
> > However, when I use the same settings in my software, which uses LibMesh (0.9.5) for FEM discretization, I get a SIGFPE. The backtrace is:<br>
> > <br>
> > Program received signal SIGFPE, Arithmetic exception.<br>
> > 0x00002aaab377ea26 in dvd_improvex_jd_lit_const_0 (d=0x1d29078, i=0, theta=0x1f396f8, thetai=0x1f39718, maxits=0x7fffffff816c, tol=0x7fffffff8140)<br>
> > at /depot/ncn/apps/conte/conte-gc<wbr>c-petsc35-dbg/libs/slepc/build<wbr>-real/src/eps/impls/davidson/<wbr>common/dvd_improvex.c:1112<br>
> > 1112 if (d->nR[i]/a < data->fix) {<br>
> > <br>
> > #0 0x00002aaab377ea26 in dvd_improvex_jd_lit_const_0 (d=0x1d29078, i=0, theta=0x1f396f8, thetai=0x1f39718, maxits=0x7fffffff816c, tol=0x7fffffff8140)<br>
> > at /depot/ncn/apps/conte/conte-gc<wbr>c-petsc35-dbg/libs/slepc/build<wbr>-real/src/eps/impls/davidson/<wbr>common/dvd_improvex.c:1112<br>
> > #1 0x00002aaab3774316 in dvd_improvex_jd_gen (d=0x1d29078, r_s=0, r_e=1, size_D=0x7fffffff821c) at /depot/ncn/apps/conte/conte-gc<wbr>c-petsc35-dbg/libs/slepc/build<wbr>-real/src/eps/impls/davidson/<wbr>common/dvd_improvex.c:316<br>
> > #2 0x00002aaab3731ec4 in dvd_updateV_update_gen (d=0x1d29078) at /depot/ncn/apps/conte/conte-gc<wbr>c-petsc35-dbg/libs/slepc/build<wbr>-real/src/eps/impls/davidson/<wbr>common/dvd_updatev.c:360<br>
> > #3 0x00002aaab3730296 in dvd_updateV_extrapol (d=0x1d29078) at /depot/ncn/apps/conte/conte-gc<wbr>c-petsc35-dbg/libs/slepc/build<wbr>-real/src/eps/impls/davidson/<wbr>common/dvd_updatev.c:193<br>
> > #4 0x00002aaab3727cbc in EPSSolve_XD (eps=0x1d0ee10) at /depot/ncn/apps/conte/conte-gc<wbr>c-petsc35-dbg/libs/slepc/build<wbr>-real/src/eps/impls/davidson/<wbr>common/davidson.c:299<br>
> > #5 0x00002aaab35bafc8 in EPSSolve (eps=0x1d0ee10) at /depot/ncn/apps/conte/conte-gc<wbr>c-petsc35-dbg/libs/slepc/build<wbr>-real/src/eps/interface/epssol<wbr>ve.c:99<br>
> > #6 0x00002aaab30dbaf9 in libMesh::SlepcEigenSolver<doub<wbr>le>::_solve_generalized_helper (this=0x1b19880, mat_A=0x1c906d0, mat_B=0x1cb16b0, nev=5, ncv=20, tol=9.9999999999999998e-13, m_its=3000) at src/solvers/slepc_eigen_solver<wbr>.C:519<br>
> > #7 0x00002aaab30da56a in libMesh::SlepcEigenSolver<doub<wbr>le>::solve_generalized (this=0x1b19880, matrix_A_in=..., matrix_B_in=..., nev=5, ncv=20, tol=9.9999999999999998e-13, m_its=3000) at src/solvers/slepc_eigen_solver<wbr>.C:316<br>
> > #8 0x00002aaab30fb02e in libMesh::EigenSystem::solve (this=0x1b19930) at src/systems/eigen_system.C:241<br>
> > #9 0x00002aaab30e48a9 in libMesh::CondensedEigenSystem:<wbr>:solve (this=0x1b19930) at src/systems/condensed_eigen_sy<wbr>stem.C:106<br>
> > #10 0x00002aaaacce0e78 in EMSchrodingerFEM::do_solve (this=0x19d6a90) at EMSchrodingerFEM.cpp:879<br>
> > #11 0x00002aaaadaae3e5 in Simulation::solve (this=0x19d6a90) at Simulation.cpp:789<br>
> > #12 0x00002aaaad52458b in NonlinearPoissonFEM::do_my_ass<wbr>emble (this=0x19da050, x=..., residual=0x7fffffff9eb0, jacobian=0x0) at NonlinearPoissonFEM.cpp:179<br>
> > #13 0x00002aaaad555eec in NonlinearPoisson::my_assemble_<wbr>residual (x=..., r=..., s=...) at NonlinearPoisson.cpp:1469<br>
> > #14 0x00002aaab30c5dc3 in libMesh::__libmesh_petsc_snes_<wbr>residual (snes=0x1b9ed70, x=0x1a50330, r=0x1a47a50, ctx=0x19e5a60) at src/solvers/petsc_nonlinear_so<wbr>lver.C:137<br>
> > #15 0x00002aaab41048b9 in SNESComputeFunction (snes=0x1b9ed70, x=0x1a50330, y=0x1a47a50) at /depot/ncn/apps/conte/conte-gc<wbr>c-petsc35-dbg/libs/petsc/build<wbr>-real/src/snes/interface/snes.<wbr>c:2033<br>
> > #16 0x00002aaaad1c9ad8 in SNESShellSolve_PredictorCorrec<wbr>tor (snes=0x1b9ed70, vec_sol=0x1a2a5a0) at PredictorCorrectorModule.cpp:4<wbr>13<br>
> > #17 0x00002aaab4653e3d in SNESSolve_Shell (snes=0x1b9ed70) at /depot/ncn/apps/conte/conte-gc<wbr>c-petsc35-dbg/libs/petsc/build<wbr>-real/src/snes/impls/shell/<wbr>snesshell.c:167<br>
> > #18 0x00002aaab4116fb7 in SNESSolve (snes=0x1b9ed70, b=0x0, x=0x1a2a5a0) at /depot/ncn/apps/conte/conte-gc<wbr>c-petsc35-dbg/libs/petsc/build<wbr>-real/src/snes/interface/snes.<wbr>c:3743<br>
> > #19 0x00002aaab30c7c3c in libMesh::PetscNonlinearSolver<<wbr>double>::solve (this=0x19e5a60, jac_in=..., x_in=..., r_in=...) at src/solvers/petsc_nonlinear_so<wbr>lver.C:714<br>
> > #20 0x00002aaab3136ad9 in libMesh::NonlinearImplicitSyst<wbr>em::solve (this=0x19e4b80) at src/systems/nonlinear_implicit<wbr>_system.C:183<br>
> > #21 0x00002aaaad5791f3 in NonlinearPoisson::execute_solv<wbr>er (this=0x19da050) at NonlinearPoisson.cpp:1218<br>
> > #22 0x00002aaaad554a99 in NonlinearPoisson::do_solve (this=0x19da050) at NonlinearPoisson.cpp:961<br>
> > #23 0x00002aaaadaae3e5 in Simulation::solve (this=0x19da050) at Simulation.cpp:789<br>
> > #24 0x00002aaaad1c9657 in PredictorCorrectorModule::do_s<wbr>olve (this=0x19c0210) at PredictorCorrectorModule.cpp:3<wbr>34<br>
> > #25 0x00002aaaadaae3e5 in Simulation::solve (this=0x19c0210) at Simulation.cpp:789<br>
> > #26 0x00002aaaad9e8f4a in Nemo::run_simulations (this=0x63ba80 <Nemo::instance()::impl>) at Nemo.cpp:1367<br>
> > #27 0x0000000000426f36 in main (argc=2, argv=0x7fffffffd0f8) at main.cpp:452<br>
> > <br>
> > <br>
> > Here is the log_view from the standalone executable:<br>
> > <br>
> > ******************************<wbr>******************************<wbr>******************************<wbr>******************************<br>
> > *** WIDEN YOUR WINDOW TO 120 CHARACTERS. Use 'enscript -r -fCourier9' to print this document ***<br>
> > ******************************<wbr>******************************<wbr>******************************<wbr>******************************<br>
> > <br>
> > ------------------------------<wbr>---------------- PETSc Performance Summary: ------------------------------<wbr>----------------<br>
> > <br>
> > ./libmesh_solve_eigenproblem on a linux named <a href="http://conte-a373.rcac.purdue.edu" rel="noreferrer" target="_blank">conte-a373.rcac.purdue.edu</a> with 16 processors, by hsahasra Thu May 3 20:56:03 2018<br>
> > Using Petsc Release Version 3.5.4, May, 23, 2015 <br>
> > <br>
> > Max Max/Min Avg Total <br>
> > Time (sec): 2.628e+01 1.00158 2.625e+01<br>
> > Objects: 6.400e+03 1.00000 6.400e+03<br>
> > Flops: 3.576e+09 1.00908 3.564e+09 5.702e+10<br>
> > Flops/sec: 1.363e+08 1.00907 1.358e+08 2.172e+09<br>
> > MPI Messages: 1.808e+04 2.74920 1.192e+04 1.907e+05<br>
> > MPI Message Lengths: 4.500e+07 1.61013 3.219e+03 6.139e+08<br>
> > MPI Reductions: 8.522e+03 1.00000<br>
> > <br>
> > Flop counting convention: 1 flop = 1 real number operation of type (multiply/divide/add/subtract)<br>
> > e.g., VecAXPY() for real vectors of length N --> 2N flops<br>
> > and VecAXPY() for complex vectors of length N --> 8N flops<br>
> > <br>
> > Summary of Stages: ----- Time ------ ----- Flops ----- --- Messages --- -- Message Lengths -- -- Reductions --<br>
> > Avg %Total Avg %Total counts %Total Avg %Total counts %Total <br>
> > 0: Main Stage: 2.6254e+01 100.0% 5.7023e+10 100.0% 1.907e+05 100.0% 3.219e+03 100.0% 8.521e+03 100.0% <br>
> > <br>
> > ------------------------------<wbr>------------------------------<wbr>------------------------------<wbr>------------------------------<br>
> > See the 'Profiling' chapter of the users' manual for details on interpreting output.<br>
> > Phase summary info:<br>
> > Count: number of times phase was executed<br>
> > Time and Flops: Max - maximum over all processors<br>
> > Ratio - ratio of maximum to minimum over all processors<br>
> > Mess: number of messages sent<br>
> > Avg. len: average message length (bytes)<br>
> > Reduct: number of global reductions<br>
> > Global: entire computation<br>
> > Stage: stages of a computation. Set stages with PetscLogStagePush() and PetscLogStagePop().<br>
> > %T - percent time in this phase %F - percent flops in this phase<br>
> > %M - percent messages in this phase %L - percent message lengths in this phase<br>
> > %R - percent reductions in this phase<br>
> > Total Mflop/s: 10e-6 * (sum of flops over all processors)/(max time over all processors)<br>
> > ------------------------------<wbr>------------------------------<wbr>------------------------------<wbr>------------------------------<br>
> > Event Count Time (sec) Flops --- Global --- --- Stage --- Total<br>
> > Max Ratio Max Ratio Max Ratio Mess Avg len Reduct %T %F %M %L %R %T %F %M %L %R Mflop/s<br>
> > ------------------------------<wbr>------------------------------<wbr>------------------------------<wbr>------------------------------<br>
> > <br>
> > --- Event Stage 0: Main Stage<br>
> > <br>
> > MatMult 1639 1.0 4.7509e+00 1.7 3.64e+08 1.1 1.9e+05 3.0e+03 0.0e+00 13 10100 93 0 13 10100 93 0 1209<br>
> > MatSolve 1045 1.0 6.4188e-01 1.0 2.16e+08 1.1 0.0e+00 0.0e+00 0.0e+00 2 6 0 0 0 2 6 0 0 0 5163<br>
> > MatLUFactorNum 1 1.0 2.0798e-02 3.5 9.18e+05 1.1 0.0e+00 0.0e+00 0.0e+00 0 0 0 0 0 0 0 0 0 0 664<br>
> > MatILUFactorSym 1 1.0 1.1777e-02 5.9 0.00e+00 0.0 0.0e+00 0.0e+00 0.0e+00 0 0 0 0 0 0 0 0 0 0 0<br>
> > MatAssemblyBegin 4 1.0 1.3677e-01 6.8 0.00e+00 0.0 0.0e+00 0.0e+00 8.0e+00 0 0 0 0 0 0 0 0 0 0 0<br>
> > MatAssemblyEnd 4 1.0 3.7882e-02 1.3 0.00e+00 0.0 4.6e+02 7.5e+02 1.6e+01 0 0 0 0 0 0 0 0 0 0 0<br>
> > MatGetRowIJ 1 1.0 7.1526e-06 3.8 0.00e+00 0.0 0.0e+00 0.0e+00 0.0e+00 0 0 0 0 0 0 0 0 0 0 0<br>
> > MatGetOrdering 1 1.0 2.3198e-04 1.4 0.00e+00 0.0 0.0e+00 0.0e+00 0.0e+00 0 0 0 0 0 0 0 0 0 0 0<br>
> > MatZeroEntries 33 1.0 1.1992e-04 1.1 0.00e+00 0.0 0.0e+00 0.0e+00 0.0e+00 0 0 0 0 0 0 0 0 0 0 0<br>
> > MatLoad 2 1.0 2.9271e-01 1.0 0.00e+00 0.0 5.5e+02 7.6e+04 2.6e+01 1 0 0 7 0 1 0 0 7 0 0<br>
> > VecCopy 2096 1.0 4.0181e-02 1.1 0.00e+00 0.0 0.0e+00 0.0e+00 0.0e+00 0 0 0 0 0 0 0 0 0 0 0<br>
> > VecSet 1047 1.0 1.7598e-02 1.1 0.00e+00 0.0 0.0e+00 0.0e+00 0.0e+00 0 0 0 0 0 0 0 0 0 0 0<br>
> > VecScatterBegin 1639 1.0 4.3395e-01 2.0 0.00e+00 0.0 1.9e+05 3.0e+03 0.0e+00 1 0100 93 0 1 0100 93 0 0<br>
> > VecScatterEnd 1639 1.0 3.2399e+00 2.3 0.00e+00 0.0 0.0e+00 0.0e+00 0.0e+00 8 0 0 0 0 8 0 0 0 0 0<br>
> > VecReduceArith 2096 1.0 5.6402e-02 1.1 3.27e+07 1.0 0.0e+00 0.0e+00 0.0e+00 0 1 0 0 0 0 1 0 0 0 9287<br>
> > VecReduceComm 1572 1.0 5.5213e+00 1.2 0.00e+00 0.0 0.0e+00 0.0e+00 1.6e+03 20 0 0 0 18 20 0 0 0 18 0<br>
> > EPSSetUp 1 1.0 9.0121e-02 1.3 0.00e+00 0.0 0.0e+00 0.0e+00 5.2e+01 0 0 0 0 1 0 0 0 0 1 0<br>
> > EPSSolve 1 1.0 2.5917e+01 1.0 3.58e+09 1.0 1.9e+05 3.0e+03 8.5e+03 99100100 93100 99100100 93100 2200<br>
> > STSetUp 1 1.0 4.8380e-03 5.6 0.00e+00 0.0 0.0e+00 0.0e+00 2.0e+00 0 0 0 0 0 0 0 0 0 0 0<br>
> > KSPSetUp 1 1.0 1.1921e-06 0.0 0.00e+00 0.0 0.0e+00 0.0e+00 0.0e+00 0 0 0 0 0 0 0 0 0 0 0<br>
> > KSPSolve 1045 1.0 6.8107e-01 1.0 2.17e+08 1.1 0.0e+00 0.0e+00 0.0e+00 3 6 0 0 0 3 6 0 0 0 4886<br>
> > PCSetUp 2 1.0 2.3827e-02 2.8 9.18e+05 1.1 0.0e+00 0.0e+00 0.0e+00 0 0 0 0 0 0 0 0 0 0 580<br>
> > PCApply 1045 1.0 7.0819e-01 1.0 2.17e+08 1.1 0.0e+00 0.0e+00 0.0e+00 3 6 0 0 0 3 6 0 0 0 4699<br>
> > BVCreate 529 1.0 3.7145e+00 1.6 0.00e+00 0.0 0.0e+00 0.0e+00 3.2e+03 11 0 0 0 37 11 0 0 0 37 0<br>
> > BVCopy 1048 1.0 1.3941e-02 1.2 0.00e+00 0.0 0.0e+00 0.0e+00 0.0e+00 0 0 0 0 0 0 0 0 0 0 0<br>
> > BVMult 3761 1.0 3.6953e+00 1.1 2.00e+09 1.0 0.0e+00 0.0e+00 0.0e+00 14 56 0 0 0 14 56 0 0 0 8674<br>
> > BVDot 2675 1.0 9.6611e+00 1.3 1.08e+09 1.0 6.8e+04 3.0e+03 2.7e+03 34 30 36 33 31 34 30 36 33 31 1791<br>
> > BVOrthogonalize 526 1.0 4.0705e+00 1.1 7.89e+08 1.0 6.8e+04 3.0e+03 5.9e+02 15 22 36 33 7 15 22 36 33 7 3092<br>
> > BVScale 1047 1.0 1.6144e-02 1.1 8.18e+06 1.0 0.0e+00 0.0e+00 0.0e+00 0 0 0 0 0 0 0 0 0 0 8105<br>
> > BVSetRandom 5 1.0 4.7204e-02 2.0 0.00e+00 0.0 0.0e+00 0.0e+00 0.0e+00 0 0 0 0 0 0 0 0 0 0 0<br>
> > BVMatProject 1046 1.0 5.1708e+00 1.4 6.11e+08 1.0 0.0e+00 0.0e+00 1.6e+03 18 17 0 0 18 18 17 0 0 18 1891<br>
> > DSSolve 533 1.0 9.7243e-01 1.0 0.00e+00 0.0 0.0e+00 0.0e+00 0.0e+00 4 0 0 0 0 4 0 0 0 0 0<br>
> > DSVectors 1048 1.0 1.3440e-03 1.4 0.00e+00 0.0 0.0e+00 0.0e+00 0.0e+00 0 0 0 0 0 0 0 0 0 0 0<br>
> > DSOther 2123 1.0 8.8778e-03 1.1 0.00e+00 0.0 0.0e+00 0.0e+00 0.0e+00 0 0 0 0 0 0 0 0 0 0 0<br>
> > ------------------------------<wbr>------------------------------<wbr>------------------------------<wbr>------------------------------<br>
> > <br>
> > Memory usage is given in bytes:<br>
> > <br>
> > Object Type Creations Destructions Memory Descendants' Mem.<br>
> > Reports information only for process 0.<br>
> > <br>
> > --- Event Stage 0: Main Stage<br>
> > <br>
> > Viewer 3 2 1504 0<br>
> > Matrix 3196 3190 31529868 0<br>
> > Vector 2653 2651 218802920 0<br>
> > Vector Scatter 2 0 0 0<br>
> > Index Set 7 7 84184 0<br>
> > Eigenvalue Problem Solver 1 1 4564 0<br>
> > PetscRandom 1 1 632 0<br>
> > Spectral Transform 1 1 828 0<br>
> > Krylov Solver 2 2 2320 0<br>
> > Preconditioner 2 2 1912 0<br>
> > Basis Vectors 530 530 1111328 0<br>
> > Region 1 1 648 0<br>
> > Direct solver 1 1 201200 0<br>
> > ==============================<wbr>==============================<wbr>==============================<wbr>==============================<br>
> > Average time to get PetscTime(): 9.53674e-08<br>
> > Average time for MPI_Barrier(): 0.0004704<br>
> > Average time for zero size MPI_Send(): 0.000118256<br>
> > #PETSc Option Table entries:<br>
> > -eps_monitor<br>
> > -f1 A.mat<br>
> > -f2 B.mat<br>
> > -log_view<br>
> > -matload_block_size 1<br>
> > -ncv 70<br>
> > -st_ksp_tol 1e-12<br>
> > #End of PETSc Option Table entries<br>
> > Compiled without FORTRAN kernels<br>
> > Compiled with full precision matrices (default)<br>
> > sizeof(short) 2 sizeof(int) 4 sizeof(long) 8 sizeof(void*) 8 sizeof(PetscScalar) 8 sizeof(PetscInt) 4<br>
> > Configure options: --with-x=0 --download-hdf5=1 --with-scalar-type=real --with-single-library=1 --with-pic=1 --with-shared-libraries=0 --with-clanguage=C++ --with-fortran=1 --with-debugging=0 --with-cc=mpicc --with-fc=mpif90 --with-cxx=mpicxx --download-metis=1 --download-parmetis=1 --with-valgrind-dir=/apps/rhel<wbr>6/valgrind/3.8.1/ --download-mumps=1 --with-fortran-kernels=0 --download-superlu_dist=1 --download-scalapack --download-fblaslapack=1<br>
> > ------------------------------<wbr>-----------<br>
> > Libraries compiled on Thu Sep 22 10:19:43 2016 on <a href="http://carter-g008.rcac.purdue.edu" rel="noreferrer" target="_blank">carter-g008.rcac.purdue.edu</a> <br>
> > Machine characteristics: Linux-2.6.32-573.8.1.el6.x86_6<wbr>4-x86_64-with-redhat-6.7-Santi<wbr>ago<br>
> > Using PETSc directory: /depot/ncn/apps/conte/conte-gc<wbr>c-petsc35/libs/petsc/build-rea<wbr>l<br>
> > Using PETSc arch: linux<br>
> > ------------------------------<wbr>-----------<br>
> > <br>
> > Using C compiler: mpicxx -Wall -Wwrite-strings -Wno-strict-aliasing -Wno-unknown-pragmas -O -fPIC ${COPTFLAGS} ${CFLAGS}<br>
> > Using Fortran compiler: mpif90 -fPIC -Wall -Wno-unused-variable -ffree-line-length-0 -O ${FOPTFLAGS} ${FFLAGS} <br>
> > ------------------------------<wbr>-----------<br>
> > <br>
> > Using include paths: -I/depot/ncn/apps/conte/conte-<wbr>gcc-petsc35/libs/petsc/build-r<wbr>eal/linux/include -I/depot/ncn/apps/conte/conte-<wbr>gcc-petsc35/libs/petsc/build-r<wbr>eal/include -I/depot/ncn/apps/conte/conte-<wbr>gcc-petsc35/libs/petsc/build-r<wbr>eal/include -I/depot/ncn/apps/conte/conte-<wbr>gcc-petsc35/libs/petsc/build-r<wbr>eal/linux/include -I/apps/rhel6/valgrind/3.8.1/i<wbr>nclude -I/depot/apps/ncn/conte/mpich-<wbr>3.1/include<br>
> > ------------------------------<wbr>-----------<br>
> > <br>
> > Using C linker: mpicxx<br>
> > Using Fortran linker: mpif90<br>
> > Using libraries: -Wl,-rpath,/depot/ncn/apps/con<wbr>te/conte-gcc-petsc35/libs/pets<wbr>c/build-real/linux/lib -L/depot/ncn/apps/conte/conte-<wbr>gcc-petsc35/libs/petsc/build-r<wbr>eal/linux/lib -lpetsc -Wl,-rpath,/depot/ncn/apps/con<wbr>te/conte-gcc-petsc35/libs/pets<wbr>c/build-real/linux/lib -L/depot/ncn/apps/conte/conte-<wbr>gcc-petsc35/libs/petsc/build-r<wbr>eal/linux/lib -lcmumps -ldmumps -lsmumps -lzmumps -lmumps_common -lpord -lscalapack -lsuperlu_dist_3.3 -lflapack -lfblas -lparmetis -lmetis -lpthread -lssl -lcrypto -lhdf5hl_fortran -lhdf5_fortran -lhdf5_hl -lhdf5 -lz -Wl,-rpath,/depot/apps/ncn/con<wbr>te/mpich-3.1/lib -L/depot/apps/ncn/conte/mpich-<wbr>3.1/lib -Wl,-rpath,/apps/rhel6/gcc/5.2<wbr>.0/lib/gcc/x86_64-unknown-linu<wbr>x-gnu/5.2.0 -L/apps/rhel6/gcc/5.2.0/lib/gc<wbr>c/x86_64-unknown-linux-gnu/5.<wbr>2.0 -Wl,-rpath,/apps/rhel6/gcc/5.2<wbr>.0/lib64 -L/apps/rhel6/gcc/5.2.0/lib64 -Wl,-rpath,/apps/rhel6/gcc/5.2<wbr>.0/lib -L/apps/rhel6/gcc/5.2.0/lib -lmpichf90 -lgfortran -lm -lgfortran -lm -lquadmath -lm -lmpichcxx -lstdc++ -Wl,-rpath,/depot/apps/ncn/con<wbr>te/mpich-3.1/lib -L/depot/apps/ncn/conte/mpich-<wbr>3.1/lib -Wl,-rpath,/apps/rhel6/gcc/5.2<wbr>.0/lib/gcc/x86_64-unknown-linu<wbr>x-gnu/5.2.0 -L/apps/rhel6/gcc/5.2.0/lib/gc<wbr>c/x86_64-unknown-linux-gnu/5.<wbr>2.0 -Wl,-rpath,/apps/rhel6/gcc/5.2<wbr>.0/lib64 -L/apps/rhel6/gcc/5.2.0/lib64 -Wl,-rpath,/apps/rhel6/gcc/5.2<wbr>.0/lib -L/apps/rhel6/gcc/5.2.0/lib -ldl -Wl,-rpath,/depot/apps/ncn/con<wbr>te/mpich-3.1/lib -lmpich -lopa -lmpl -lrt -lpthread -lgcc_s -ldl <br>
> > ------------------------------<wbr>-----------<br>
> > <br>
> > Can you please point me to what could be going wrong with the larger software?<br>
> > <br>
> > Thanks!<br>
> > Harshad<br>
> <br>
> <br>
<br>
</div></div></blockquote></div><br></div></div></div>