[petsc-users] Prometheus vs GAMG for elasticity/plasticity problems

[Jed Brown]

Thomas Gross <tgross at ilsb.tuwien.ac.at> writes:

> I was using a Newton Loop in Feap with a higher accuracy. This caused
> FEAP8.4 to call KSPSolve with GAMG 3 times but FEAP8.3 to call
> KSPSolve with Prometheus only 1 time.  I have now used a larger mesh
> and adapted the FEAP solve file to call KSPSolve only once for GAMG
> and Prometheus. However, Prometheus is about 3 times faster then GAMG
> (see attached log files).

At the very least, you're using different compilers and a different MPI
implementation (perhaps one is infiniband?).  Communication time is very
different in these cases.  Should fix that before thinking harder about
this.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 835 bytes
Desc: not available
URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20140127/d6cd5e85/attachment.pgp>