[petsc-dev] GPU preconditioners

[Andrea Lani]

Dear Devs,

is the PCBJACOBI solver fully ported to GPU in the latest petsc-dev
version? if not, is there any intention to do so in the near future?

I have a convection-dominated (with strong discontinuities in the flow
field) MHD problem where PCASM and PCBJACOBI both work fine with KSPGMRES.

Looking for a speedup in my code (which is using a petsc-dev version about
two-months old), the only GPU alternative I found was PCJACOBI. This is
indeed considerably faster on GPU, but does not converge (neither does,
consistently, its CPU counterpart) if not for a few iterations before
blowing up. Any other alternative for GPU-based preconditioners or solvers
worth trying at the moment?

Thanks in advance for your advice

Andrea



-- 
Dr. Andrea
Lani
Senior Research Engineer, PhD
Aeronautics & Aerospace dept., CFD group
Von Karman Institute for Fluid Dynamics
Chausse de Waterloo 72,
B-1640, Rhode-Saint-Genese,  Belgium
fax  : +32-2-3599600
work : +32-2-3599769
*lani at vki.ac.be <lani at vki.ac.be>*
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