[petsc-users] MatCopy and MatSetValue consume most 99 percentage of runtime

[Barry Smith]

   Debao,

      Please see http://www.mcs.anl.gov/petsc/petsc-as/documentation/faq.html#efficient-assembly It should resolve the difficulties.

    Barry

On Apr 15, 2011, at 2:16 AM, Debao Shao wrote:

> Dear Petsc:
>  
> I’m trying on Petsc iterative solver(KSPCG & PCJACOBI), but it’s strange that the two functions “MatCopy” and “MatSetValue” consume most of runtime, and the functions were not called frequently, just several times.
>  
> My libpetsc.a is built as follows:
> 1, /config/configure.py --with-mpi=0 --with-debugging=0 -with-log=0 -with-info=0
> 2, make all;
>  
> It’s very appreciated to get your reply.
>  
> Thanks a lot,
> Debao
> 
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