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Rawlins__David
Beginner
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Inconsistent results for Pardiso with multiple threads

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
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Gennady_F_Intel
Moderator
32 Views

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
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