[petsc-users] MatSOR for matrix of seqcusp type

[Chao Yang]

Hi, Barry,

So it's just like MatSolve, too sequential.
Thanks for the hint!

Chao

On Mar 4, 2011, at 9:43 PM, Barry Smith wrote:

> 
> On Mar 4, 2011, at 3:42 AM, Chao Yang wrote:
> 
>> Dear PETSc team,
>> 
>> I am developing a code using PETSc on GPU. In the code an SOR preconditioner is needed.
>> Is there an available version of SOR for matrix of seqcusp type in the current petsc-dev?
> 
>    No. The problem is that SOR is a sequential algorithm, there is not much parallelism in it and GPUs require/use a great deal of parallelism to get good performance. 
> Do you have alternatives? How about diagonal scaled CG or Bi-CG-stab?
> 
> 
>   Barry
> 
> 
> 
>> Thanks!
>> 
>> Best regards,
>> 
>> Chao Yang
>