[petsc-users] Report progress to an external driver code

[Dominik Szczerba]

Hi,

I need to report progress (0-100%, which I compute myself) of my Petsc
solver code to an external driver code that is controlling my solver.
I had a look at the many Petsc logging functions and examples but I am
still not sure which way to go. I tried PetscLogStage, but it does not
seem to display any information during the execution, and I also do
not see a way this information could be sent somewhere and accessed by
e.g. registering a custom (static) function used to inform the
downstream code what the solver is doing at the moment. The most
trivial solution that I have found is to output a message like [STATUS
50%], which could be intercepted in the downstream code by overwriting
PetscVFPrintf, but it sounds rather inelegant. I would be very glad to
receive some pointers where to start looking.

Regards,
Dominik