[petsc-users] MatLUFactorNumeric_SeqAIJ() consumes long runtime

[Debao Shao]

DA,

I'm using PETSc ILU(1)+GMRES to solve an QP problem. But the job may hang at "MatLUFactorNumeric_SeqAIJ()" for long time.

(gdb) bt
#0  0x0000000002284520 in MatLUFactorNumeric_SeqAIJ ()
#1  0x0000000002265f89 in MatLUFactorNumeric ()
#2  0x0000000002342ff3 in PCSetUp_ILU ()
#3  0x00000000024f8d65 in PCSetUp ()
#4  0x0000000002362964 in KSPSetUp ()
#5  0x0000000002363455 in KSPSolve ()

Do you have idea for such phenomenon?

Thanks,
Debao

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