[petsc-users] [petsc-maint #98908] Slow MatSetValues in just one of the process

[Barry Smith]

http://www.mcs.anl.gov/petsc/documentation/faq.html#efficient-assembly


On Dec 7, 2011, at 6:19 AM, Manuel Ricardo Perez Cerquera wrote:

> Dear all,
> 
> I'm having a problem with my code, when I ran with 2 processors  or more,
> when I'm setting the values The process zero seems as like I didn't do any
> kind of preallocation in its local part. I'm really confused because the
> other processes go faster. I already check the d_nnz  and o_nnz vectors and
> they are ok. Does anybody has ever had this problem? I appreciate any clue.
> Thanks
> 
> Manuel.
> 
> -- 
> Eng. Manuel Ricardo Perez Cerquera. MSc. Ph.D student
> Antenna and EMC Lab (LACE)
> Istituto Superiore Mario Boella (ISMB)
> Politecnico di Torino
> Via Pier Carlo Boggio 61, Torino 10138, Italy
> Email: manuel.perezcerquera at polito.it
> Phone: +39 0112276704
> Fax: +39 011 2276 299
>