Hello, I would like to know some information about GMRES performance in PETSc if you have any experience.
I am running a parallel test case(9300 cells) comparing cpu time using by solvers in Petsc. While BICGSTAB was doing 0.9 sec, GMRES 15 sec with the same preconditioner(Additive Schwarz). I did not expect that GMRES would be that much slower. Everything is default. Please share your experiences, how the performance of solvers are in your test cases. Which option I should set to improve GMRES performance? Is there the best combination of Preconditioner and solver? Thank you very much Jarunan -- Jarunan Panyasantisuk Development Engineer ASCOMP GmbH, Technoparkstr. 1 CH-8005 Zurich, Switzerland Phone : +41 44 445 4072 Fax : +41 44 445 4075 E-mail: jarunan at ascomp.ch www.ascomp.ch
