[petsc-users] PetscInitalize() and console output

[Matthew Knepley]

On Tue, Dec 13, 2011 at 8:43 AM, Thomas Leissing <thomas.leissing at cstb.fr>wrote:

> **
> Dear all,
>
> Somewhere in my boundary element solver I have a console progress bar
> which prints to screen the progress of an operation.
> It looks like this:
> INFO    :     50%  [------------>                   ]
>
> The function is very simple:
> //i is the current iteration number
> //n is the total number of iterations
> void progressBar(int x, int n)
> {
>
>     if ( x % (n/100) != 0 ) return;
>
>     // Calculate the ratio of complete-to-incomplete.
>     float ratio = x/(float)n;
>     int   c     = ratio * 80
>
>     // Show the percentage complete.
>     printf("INFO      :\t%3d%% [", (int)(ratio*100) );
>
>     // Show the load bar.
>     for (int x=0; x<c-1; x++)
>        printf("-");
>
>     printf(">");
>
>     for (int x=c; x<pBarWidth; x++)
>        printf(" ");
>
>     // ANSI Control codes to go back to the
>     // previous line and clear it.
>     printf("]\n\033[F\033[J");
> }
>
>
> My problem is that the progress bar doesn't print to screen as soon as I
> call the PetscInitialize() function (it works fine otherwise).
> I tried to play with fflush(stdout) commands without any success.
>
> Any ideas ?
>

This sounds like MPI rather than PETSc, since it plays with output. Are you
running with mpiexec?

   Matt


> Thanks,
> Thomas Leissing
>
>


-- 
What most experimenters take for granted before they begin their
experiments is infinitely more interesting than any results to which their
experiments lead.
-- Norbert Wiener
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