Inconsistent results for Pardiso with multiple threads

[Rawlins__David]

Hi,

I am running a finite element analysis code which uses Pardiso as the linear solver. If I use one thread, the log files are identical except for the time of the run. If I use four threads, there are significant differences in the number of iterations and right-hand-side evaluations. Do you have any idea why this might be?

Thanks,

Dave

[Gennady_F_Intel]

Hi Dave,

the similar question has been discussed here.

May be make sense to add that the problem will depends on conditional numbers of the inputmatrices.

especially if the inputmatricesis ill-conditioned.

--Gennady