[petsc-dev] Iteration counter depends on KSP monitor!

Barry Smith bsmith at mcs.anl.gov
Wed Nov 7 12:49:39 CST 2012

    This is normally not expected but might happen under some combination of solver options. Please send the output of -ksp_view and the options you use and we'll try to understand the situation.


On Nov 7, 2012, at 12:12 PM, Thomas Witkowski <thomas.witkowski at tu-dresden.de> wrote:

> I have a very curious behavior in one of my codes: Whenever I enable a KSP Monitor for an inner solver, the outer iteration count goes down from 25 to 18! Okay, this is great :) I like it so see iteration counts decreasing, but I would like to know what's going on, and eventually, a KSP monitor should not influence the whole game. An to answer your first question, I run the code through valgrind and its free of any errors. Any idea what to check next? Thanks for any advice.
> Thomas

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