<div dir="ltr">On Sat, Jul 20, 2013 at 8:39 AM, TAY wee-beng <span dir="ltr"><<a href="mailto:zonexo@gmail.com" target="_blank">zonexo@gmail.com</a>></span> wrote:<br><div class="gmail_extra"><div class="gmail_quote">
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div text="#000000" bgcolor="#FFFFFF">
Hi,<br>
<br>
I'm trying to use GAMG to speed up solving of Poisson eqn. I used:<br>
<br>
call KSPSetOptionsPrefix(ksp,"poisson_",ierr)<br>
<br>
-poisson_pc_gamg_agg_nsmooths 1 -poisson_pc_type gamg<br>
<br>
I remember it used to work in some problems but now it can't work,
with error:<br></div></blockquote><div><br></div><div>Upgrade to the latest release and we will help you debug this.</div><div><br></div><div> Matt</div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div text="#000000" bgcolor="#FFFFFF">
<b><i>[0]PETSC ERROR:
------------------------------------------------------------------------</i></b><b><i><br>
</i></b><b><i>[0]PETSC ERROR: Caught signal number 8 FPE: Floating
Point Exception,probably divide by zero</i></b><b><i><br>
</i></b><b><i>[0]PETSC ERROR: Try option -start_in_debugger or
-on_error_attach_debugger</i></b><b><i><br>
</i></b><b><i>[0]PETSC ERROR: or see
<a href="http://www.mcs.anl.gov/petsc/documentation/faq.html#valgrind" target="_blank">http://www.mcs.anl.gov/petsc/documentation/faq.html#valgrind</a>[0]PETSC
ERROR: or try <a href="http://valgrind.org" target="_blank">http://valgrind.org</a> on GNU/linux and Apple Mac OS
X to find memory corruption errors</i></b><b><i><br>
</i></b><b><i>[0]PETSC ERROR: likely location of problem given in
stack below</i></b><b><i><br>
</i></b><b><i>[0]PETSC ERROR: --------------------- Stack Frames
------------------------------------</i></b><b><i><br>
</i></b><b><i>[0]PETSC ERROR: Note: The EXACT line numbers in the
stack are not available,</i></b><b><i><br>
</i></b><b><i>[0]PETSC ERROR: INSTEAD the line number of the
start of the function</i></b><b><i><br>
</i></b><b><i>[0]PETSC ERROR: is given.</i></b><b><i><br>
</i></b><b><i>[0]PETSC ERROR: [0]
KSPComputeExtremeSingularValues_GMRES line 24
src/ksp/ksp/impls/gmres/C:\wtay\DOWNLO~1\Codes\PETSC-~1\src\ksp\ksp\impls\gmres\gmreig.c</i></b><b><i><br>
</i></b><b><i>[0]PETSC ERROR: [0] KSPComputeExtremeSingularValues
line 40
src/ksp/ksp/interface/C:\wtay\DOWNLO~1\Codes\PETSC-~1\src\ksp\ksp\INTERF~1\itfunc.c</i></b><b><i><br>
</i></b><b><i>[0]PETSC ERROR: [0] PCGAMGOptprol_AGG line 1295
src/ksp/pc/impls/gamg/C:\wtay\DOWNLO~1\Codes\PETSC-~1\src\ksp\pc\impls\gamg\agg.c</i></b><b><i><br>
</i></b><b><i>[0]PETSC ERROR: [0] PCSetUp_GAMG line 564
src/ksp/pc/impls/gamg/C:\wtay\DOWNLO~1\Codes\PETSC-~1\src\ksp\pc\impls\gamg\gamg.c</i></b><b><i><br>
</i></b><b><i>[0]PETSC ERROR: [0] PCSetUp line 810
src/ksp/pc/interface/C:\wtay\DOWNLO~1\Codes\PETSC-~1\src\ksp\pc\INTERF~1\precon.c</i></b><b><i><br>
</i></b><b><i>[0]PETSC ERROR: [0] KSPSetUp line 182
src/ksp/ksp/interface/C:\wtay\DOWNLO~1\Codes\PETSC-~1\src\ksp\ksp\INTERF~1\itfunc.c</i></b><b><i><br>
</i></b><b><i>[0]PETSC ERROR: [0] KSPSolve line 351
src/ksp/ksp/interface/C:\wtay\DOWNLO~1\Codes\PETSC-~1\src\ksp\ksp\INTERF~1\itfunc.c</i></b><b><i><br>
</i></b><b><i>[0]PETSC ERROR: --------------------- Error Message
------------------------------------</i></b><b><i><br>
</i></b><b><i>[0]PETSC ERROR: Signal received!</i></b><b><i><br>
</i></b><b><i>[0]PETSC ERROR:
------------------------------------------------------------------------</i></b><b><i><br>
</i></b><b><i>[0]PETSC ERROR: Petsc Development HG revision:
9850aeb5d33f0b33bc931843c4b3b3b4f8df6a3b HG Date: Tue Oct 02
22:18:53 2012 -0500</i></b><b><i><br>
</i></b><b><i>[0]PETSC ERROR: See docs/changes/index.html for
recent updates.</i></b><b><i><br>
</i></b><b><i>[0]PETSC ERROR: See docs/faq.html for hints about
trouble shooting.</i></b><b><i><br>
</i></b><b><i>[0]PETSC ERROR: See docs/index.html for manual
pages.</i></b><b><i><br>
</i></b><b><i>[0]PETSC ERROR:
------------------------------------------------------------------------</i></b><b><i><br>
</i></b><b><i>[0]PETSC ERROR:
C:\Obj_tmp\ibm3d_high_Re_staggered_AB2\Debug\ibm3d_high_Re_staggered_AB2.exe
on a petsc-3.3 named USER-PC by User Sat Jul 20 15:37:40 2013</i></b><b><i><br>
</i></b><b><i>[0]PETSC ERROR: Libraries linked from
/cygdrive/d/wtay/Lib/petsc-3.3-dev_win32_vs2008/lib</i></b><b><i><br>
</i></b><b><i>[0]PETSC ERROR: Configure run at Thu Oct 4 10:01:13
2012</i></b><b><i><br>
</i></b><b><i>[0]PETSC ERROR: Configure options --with-cc="win32fe
cl" --with-fc="win32fe ifort" --with-cxx="win32fe cl"
--with-mpi-dir=/cygdrive/c/MPICH2/ --download-f-blas-lapack=1
--prefix=/cygdrive/d/wtay/Lib/petsc-3.3-dev_win32_vs2008
--with-debugging=1 --useThreads=0</i></b><b><i><br>
</i></b><b><i>[0]PETSC ERROR:
------------------------------------------------------------------------</i></b><b><i><br>
</i></b><b><i>[0]PETSC ERROR: User provided function() line 0 in
unknown directory unknown file</i></b><b><i><br>
</i></b><b><i>application called MPI_Abort(MPI_COMM_WORLD, 59) -
process 0</i></b><b><i><br>
</i></b><b><i><br>
</i></b><b><i>job aborted:</i></b><b><i><br>
</i></b><b><i>rank: node: exit code[: error message]</i></b><b><i><br>
</i></b><b><i>0: User-PC: 59: process 0 exited without calling
finalize</i></b><i><br>
</i><br>
<br>
I read in one of the threads that I can use:<br>
<br>
-pc_type gamg -pc_gamg_agg_nsmooths 1 -mg_levels_ksp_type richardson
-mg_levels_pc_type sor<br>
<br>
It worked but I got the msg:<br>
<br>
WARNING! There are options you set that were not used!<br>
WARNING! could be spelling mistake, etc!<br>
Option left: name:-mg_levels_ksp_type value: richardson<br>
Option left: name:-mg_levels_pc_type value: sor<br>
Option left: name:-pc_gamg_agg_nsmooths value: 1<br>
Option left: name:-pc_type value: gamg<br>
Press any key to continue . . .<br>
<br>
If I used this:<br>
<br>
-poisson_pc_type gamg -poisson_pc_gamg_agg_nsmooths 1
-poisson_mg_levels_ksp_type richardson -poisson_mg_levels_pc_type
sor<br>
<br>
It aborts with error:<br>
<br>
<b><i>[0]PETSC ERROR:
------------------------------------------------------------------------</i></b><b><i><br>
</i></b><b><i>[0]PETSC ERROR: Caught signal number 8 FPE: Floating
Point Exception,probably divide by zero</i></b><b><i><br>
</i></b><b><i>[0]PETSC ERROR: Try option -start_in_debugger or
-on_error_attach_debugger</i></b><b><i><br>
</i></b><b><i>[0]PETSC ERROR: or see
<a href="http://www.mcs.anl.gov/petsc/documentation/faq.html#valgrind" target="_blank">http://www.mcs.anl.gov/petsc/documentation/faq.html#valgrind</a>[0]PETSC
ERROR: or try <a href="http://valgrind.org" target="_blank">http://valgrind.org</a> on GNU/linux and Apple Mac OS
X to find memory corruption errors</i></b><b><i><br>
</i></b><b><i>[0]PETSC ERROR: likely location of problem given in
stack below</i></b><b><i><br>
</i></b><b><i>[0]PETSC ERROR: --------------------- Stack Frames
------------------------------------</i></b><b><i><br>
</i></b><b><i>[0]PETSC ERROR: Note: The EXACT line numbers in the
stack are not available,</i></b><b><i><br>
</i></b><b><i>[0]PETSC ERROR: INSTEAD the line number of the
start of the function</i></b><b><i><br>
</i></b><b><i>[0]PETSC ERROR: is given.</i></b><b><i><br>
</i></b><b><i>[0]PETSC ERROR: [0]
KSPComputeExtremeSingularValues_GMRES line 24
src/ksp/ksp/impls/gmres/C:\wtay\DOWNLO~1\Codes\PETSC-~1\src\ksp\ksp\impls\gmres\gmreig.c</i></b><b><i><br>
</i></b><b><i>[0]PETSC ERROR: [0] KSPComputeExtremeSingularValues
line 40
src/ksp/ksp/interface/C:\wtay\DOWNLO~1\Codes\PETSC-~1\src\ksp\ksp\INTERF~1\itfunc.c</i></b><b><i><br>
</i></b><b><i>[0]PETSC ERROR: [0] PCGAMGOptprol_AGG line 1295
src/ksp/pc/impls/gamg/C:\wtay\DOWNLO~1\Codes\PETSC-~1\src\ksp\pc\impls\gamg\agg.c</i></b><b><i><br>
</i></b><b><i>[0]PETSC ERROR: [0] PCSetUp_GAMG line 564
src/ksp/pc/impls/gamg/C:\wtay\DOWNLO~1\Codes\PETSC-~1\src\ksp\pc\impls\gamg\gamg.c</i></b><b><i><br>
</i></b><b><i>[0]PETSC ERROR: [0] PCSetUp line 810
src/ksp/pc/interface/C:\wtay\DOWNLO~1\Codes\PETSC-~1\src\ksp\pc\INTERF~1\precon.c</i></b><b><i><br>
</i></b><b><i>[0]PETSC ERROR: [0] KSPSetUp line 182
src/ksp/ksp/interface/C:\wtay\DOWNLO~1\Codes\PETSC-~1\src\ksp\ksp\INTERF~1\itfunc.c</i></b><b><i><br>
</i></b><b><i>[0]PETSC ERROR: [0] KSPSolve line 351
src/ksp/ksp/interface/C:\wtay\DOWNLO~1\Codes\PETSC-~1\src\ksp\ksp\INTERF~1\itfunc.c</i></b><b><i><br>
</i></b><b><i>[0]PETSC ERROR: --------------------- Error Message
------------------------------------</i></b><b><i><br>
</i></b><b><i>[0]PETSC ERROR: Signal received!</i></b><b><i><br>
</i></b><b><i>[0]PETSC ERROR:
------------------------------------------------------------------------</i></b><b><i><br>
</i></b><b><i>[0]PETSC ERROR: Petsc Development HG revision:
9850aeb5d33f0b33bc931843c4b3b3b4f8df6a3b HG Date: Tue Oct 02
22:18:53 2012 -0500</i></b><b><i><br>
</i></b><b><i>[0]PETSC ERROR: See docs/changes/index.html for
recent updates.</i></b><b><i><br>
</i></b><b><i>[0]PETSC ERROR: See docs/faq.html for hints about
trouble shooting.</i></b><b><i><br>
</i></b><b><i>[0]PETSC ERROR: See docs/index.html for manual
pages.</i></b><b><i><br>
</i></b><b><i>[0]PETSC ERROR:
------------------------------------------------------------------------</i></b><b><i><br>
</i></b><b><i>[0]PETSC ERROR:
C:\Obj_tmp\ibm3d_high_Re_staggered_AB2\Debug\ibm3d_high_Re_staggered_AB2.exe
on a petsc-3.3 named USER-PC by User Sat Jul 20 15:36:24 2013</i></b><b><i><br>
</i></b><b><i>[0]PETSC ERROR: Libraries linked from
/cygdrive/d/wtay/Lib/petsc-3.3-dev_win32_vs2008/lib</i></b><b><i><br>
</i></b><b><i>[0]PETSC ERROR: Configure run at Thu Oct 4 10:01:13
2012</i></b><b><i><br>
</i></b><b><i>[0]PETSC ERROR: Configure options --with-cc="win32fe
cl" --with-fc="win32fe ifort" --with-cxx="win32fe cl"
--with-mpi-dir=/cygdrive/c/MPICH2/ --download-f-blas-lapack=1
--prefix=/cygdrive/d/wtay/Lib/petsc-3.3-dev_win32_vs2008
--with-debugging=1 --useThreads=0</i></b><b><i><br>
</i></b><b><i>[0]PETSC ERROR:
------------------------------------------------------------------------</i></b><b><i><br>
</i></b><b><i>[0]PETSC ERROR: User provided function() line 0 in
unknown directory unknown file</i></b><b><i><br>
</i></b><b><i>application called MPI_Abort(MPI_COMM_WORLD, 59) -
process 0</i></b><b><i><br>
</i></b><b><i><br>
</i></b><b><i>job aborted:</i></b><b><i><br>
</i></b><b><i>rank: node: exit code[: error message]</i></b><b><i><br>
</i></b><b><i>0: User-PC: 59: process 0 exited without calling
finalize</i></b><b><i><br>
</i></b><br>
<br>
<br>
So is there a recommended test command or method?<br>
<br>
Thank!<span class="HOEnZb"><font color="#888888"><br>
<pre cols="72">--
Yours sincerely,
TAY wee-beng</pre>
</font></span></div>
</blockquote></div><br><br clear="all"><div><br></div>-- <br>What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead.<br>
-- Norbert Wiener
</div></div>