[petsc-users] PaStix is slower in pestc-dev

[Xiangdong Liang]

Hello PETSc team,

I was using PaStiX within petsc 3.1-p8. Today, I am trying PaStiX
within petsc-dev. However, For the same code, solving the same linear
system takes longer time (120s vs 90s) in petsc-dev. Both are compiled
with debugging mode off. Is it possible that the newer PaStiX is
slower than old version? or due to some options in compiling?

Best,
Xiangdong

PS. I cannot use PaStiX in 3.2 because in the runtime, PaStiX crashed
due to missing of the option -DWITHSCOTCH during compiling. It was
reported before by one user and fixed in petsc-dev, but not in
petsc-3.2-p5.

http://lists.mcs.anl.gov/pipermail/petsc-users/2011-March/008356.html