dolfin team mailing list archive

[Andy Terrel <aterrel@xxxxxxxxxxxx>]

Hello,

So I have been trying to run some simulations in parallel, when I 
noticed that I was getting the same timings and iteration counts on 4 
processors as on 1.  It seems that all the Petsc matrix, vector, ksp, 
... objects are created using PETSC_COMM_SELF, and thus I was running 
not 1 simulation on 4 processors but 4 simulations on 4 processors.  
When I go to change the PETSC_COMM I am confronted with lots of errors 
(mostly about getting non-local rows probably in the PETScMatrix.nz() 
function.  I also see some comments such as:

// FIXME: Temporary fix (assumes uniprocessor case)

I am just wondering if anyone else is running into these sorts of errors 
or if I have horribly misconfigured something while building things. I 
was using the 0.6.4 release because I wanted a stable release that I 
could use on a large cluster, but it seems that the same code is in the 
dev repo.

Thanks,
Andy

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Andy Terrel
Computer Science Dept
University of Chicago
aterrel@xxxxxxxxxxxx
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