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 >
