[petsc-users] Building the same petsc matrix with different numprocs gives different results!

[Analabha Roy]

Hi all,


Compiling and running this
code<https://code.google.com/p/daneelrepo/source/browse/eth_question/eth.c>that
builds a petsc matrix gives different results when run with different
number of processors.

The code is large and complex, so I have created a smaller program
with the same
loop structure here. <http://pastebin.ca/2457643>

Compile it and run it with "mpirun -np $N ./test -draw_pause -1" gives
different results for different values of N even though it's not supposed
to.

Here is a sample output <http://i42.tinypic.com/2s16ccw.jpg> for N=1,2,3,4
from left to right.

Can anyone guide me as to what I'm doing wrong? Are any of the petssc
routines used not parallelizable?

Thanks in advance,

Regards.

-- 
---
*Analabha Roy*
C.S.I.R <http://www.csir.res.in>  Senior Research
Associate<http://csirhrdg.res.in/poolsra.htm>
Saha Institute of Nuclear Physics <http://www.saha.ac.in>
Section 1, Block AF
Bidhannagar, Calcutta 700064
India
*Emails*: daneel at physics.utexas.edu, hariseldon99 at gmail.com
*Webpage*: http://www.ph.utexas.edu/~daneel/
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