Time to execute KSPSetUp

jerome ho jerome.snho at gmail.com
Thu Jan 29 19:46:12 CST 2009


I wonder if there's any way I can speed up KSPSetUp()?
On larger test cases with 1e8 unknowns, it's taking more than 17 hours (and
still incomplete) to execute this command across 3 processors with
where as the whole setup+solving takes 2 min if the problem size is 1e6.

I've verified that the matrices has completed assembly and I'm using the
non-debugging Petsc version.

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